Winter has a way of exposing every weak spot in a house. The extra jumper comes out. Doors close to keep warmth in. Someone grabs the blanket off the couch. The heater’s been running for hours, but one room still feels colder than the rest. That’s usually when homeowners start asking questions. Is the heater the problem? Are the old batts doing anything anymore? Or is the roof letting all the warmth out? That’s usually when spray foam comes into the conversation. Ask a neighbour, scroll Reddit, check a renovation Facebook group, or spend ten minutes on YouTube and you’ll find strong opinions in every direction. Some homeowners swear by it. Others say avoid it completely. So what’s the real answer? This guide breaks down where spray foam roof insulation makes sense, where it doesn’t, and what Australian homeowners should know before making the call.

Why Roof Insulation Makes Such a Big Difference

If your roof space feels like an oven in summer, that heat doesn’t politely stay up there. It pushes down into the rooms below. In winter, the opposite happens. Warm air rises, and if insulation underperforms, much of that warmth escapes through the top of the home. According to Australian government energy guidance, heating and cooling account for about 40% of household energy use. For many Australian homes, upgrading insulation can reduce heating and cooling costs by 10% to 30%. That’s why roof insulation is often one of the first places homeowners upgrade. If your home struggles to stay comfortable, improving your roof and ceiling insulation can make a measurable difference. But not all insulation works the same way. That’s when homeowners start comparing options, especially if standard insulation hasn’t solved the problem.

What Makes Spray Foam Roof & Ceiling Insulation Different

Traditional insulation like batts can do a good job, but only when it fits neatly and stays that way. Roof spaces are rarely neat. You’ve got pipes, wiring, downlights, ductwork, odd corners, and framing that doesn’t always line up cleanly. A few small gaps around those areas can be enough to let air move through, which means the insulation may look fine but still underperform. Spray foam works differently because installers apply it as a liquid. It expands into edges, gaps, and uneven spots before it sets into place. That gives it two practical benefits. It slows heat transfer and helps reduce unwanted air movement. For many homes, both batts and spray foam can work. The better choice depends on your roof and the problem you’re trying to solve.

Insulation type	May suit	Limitations
Batts	Lower upfront budgets	Rely on neat fitting
	Straightforward roof cavities	Can leave gaps
	Easy access roof spaces	May shift over time
	Simple ceiling insulation upgrades	Rodents can disturb some bulk insulation products
Spray foam	Awkward roof spaces	Higher upfront investment
	Leakage-prone areas	Requires specialist installation
	Long-term stability	Not appropriate for every roof type
	Hard-to-access cavities	Future access to services may need planning

If you want the deeper technical breakdown, our complete spray foam insulation guide explains how the system works. So, where does that actually make sense?

Where Spray Foam Roof Insulation Makes Sense

Spray foam is not a one-size-fits-all solution, but there are situations where it solves problems other insulation products struggle with.

• Older homes with inconsistent insulation: Older roof spaces often contain insulation that has shifted, sagged, deteriorated, or never properly covered the area, creating weak spots.
• Roof cavities with awkward access: Some homes have tight roof spaces where installing traditional bulk insulation neatly is difficult. Spray foam can be useful where access is limited or framing is irregular.
• Homes with noticeable drafts or uneven comfort: If one room always feels different from the rest, air leakage may be a contributing factor. Spray foam can help reduce that uncontrolled movement.
• Cathedral ceilings or limited cavity depth: Where thickness is restricted, insulation performance per thickness becomes more important.
• Retrofit upgrades: Existing homes often create practical installation constraints that new builds don’t. That can change what makes sense.

If you’re weighing alternatives, our spray foam vs batts comparison breaks down the differences. If spray foam sounds promising so far, this is usually where the practical questions start.

Does Spray Foam Cause Condensation Problems?

This is probably the biggest concern. The short answer? Not automatically. Condensation happens when moisture-laden air meets cooler surfaces under the right conditions. Poor ventilation, incorrect assembly design, hidden moisture problems, or the wrong insulation approach can all contribute. Spray foam itself is not the villain, and installation quality matters. So does roof design. That’s why the real question is not: “Is spray foam bad?” It’s: “Is my roof suitable for this type of insulation?”

Will Spray Foam Make the House Too Airtight?

This is often mentioned, but reducing uncontrolled air leakage is usually beneficial. It doesn’t mean sealing the home into an unhealthy environment. Homes still need proper ventilation, moisture management, and good insulation working together. The goal is controlled performance, not trapped stale air.

Can Spray Foam Damage Roof Timbers, Wiring, or Pipes?

It shouldn’t, as long as the roof is suitable and the job is handled properly. Leaks, moisture issues, damaged timbers, or faulty wiring should be fixed first. Insulation should never cover problems that still need repair. Spray foam bonds to the surface and forms a continuous layer, which is one reason it performs well in irregular spaces, as outlined in this spray polyurethane foam technical overview. That also means checking wiring, pipes, ducting, and anything that may need future access before spraying starts. That is why spray foam is not a DIY can-from-Bunnings job. A qualified installer should assess the roof space, plan around services, and confirm the area suits the product before application.

How Long Does Spray Foam Roof Insulation Last?

One reason homeowners consider spray foam is longevity. Unlike some fibrous insulation products, it doesn’t typically sag, slump, or shift when installed correctly. Performance lifespan depends on:

• installation quality
• roof condition
• exposure
• product selection

But properly installed spray foam is generally considered a long-term insulation solution. It usually doesn’t require ongoing maintenance, but roof spaces should be checked periodically as part of normal home maintenance, especially if leaks or other roof issues develop. Learn more: How Long Does Spray Foam Insulation Last?

When Spray Foam Is Probably Not the Right Fit

This is where it pays to be honest. Spray foam may not be the right option if:

• Insulation should never hide existing roof problems: leaks, moisture issues, or structural damage should be fixed first.
• Budget is your main concern: batts or other systems may be a more practical starting point.
• Your roof needs a specific moisture strategy: some roof assemblies require a different insulation approach.
• Your home has heritage or upgrade restrictions: not every structure suits spray foam.
• Future access to the roof space matters: planned electrical or plumbing work should be considered.
• A simpler fix may solve the issue: not every comfort problem needs premium insulation.

That’s why blanket recommendations are rarely helpful.

So, Is Spray Foam Roof Insulation Worth It?

For the right Australian home, yes. Especially where:

• traditional insulation has underperformed
• roof geometry is difficult
• air leakage affects comfort
• long-term performance matters

But “worth it” depends on the home, the roof, and the actual problem you’re trying to solve. If your heating or cooling seems to be working harder than it should, the roof may be part of the story. At Tates Coating Services, we help homeowners understand what’s happening before recommending an insulation solution. That starts with clear advice, not guesswork. If you’re unsure whether spray foam roof insulation suits your home, get in touch for a free consultation. We’ll talk through your roof space, your comfort issues, and what options make practical sense.

This winter, that dreaded power bill could feel heavier than ever.

Global energy pressures, fuel price swings, and rising living costs are already making households more cautious.

The ABS reported that annual CPI rose 4.6% in the 12 months to March 2026, the highest rate since September 2023.

Then winter hits, and we’re spending more time indoors.

The Ugg boots come out. The extra jumper stays on. Someone grabs the blanket from the couch and still says, “Why is this house so cold?”

In many homes, the problem isn’t the heater itself. It’s how fast the heat escapes.

Warm air leaks out through the roof, walls, gaps, and often the floor. So the heater runs longer, the temperature drops faster, and the cost builds without much comfort to show for it.

In this guide, you’ll learn where homes lose heat, how insulation helps, and what can make the biggest difference before winter.

Let’s get started.

Why Heating Feels More Expensive This Winter

When costs rise everywhere, small leaks at home matter more.

Energy.gov.au recommends setting the heating between 18°C and 20°C in winter. Every degree higher can add 5-10% to energy costs.

That matters when your home loses heat quickly.

You turn the heater up. The room warms for a bit. Then the heat disappears again.

That cycle usually points to poor house insulation, air gaps, or older insulation that no longer performs as it should.

Where Homes Lose Heat (What Most People Miss)

Most people start by checking the roof, which makes sense.

Warm air rises, so roof and ceiling insulation play a big role. But heat loss does not stop there.

It can happen through:

• Roof and ceiling spaces
• Wall cavities
• Gaps around doors, windows, and vents
• Raised timber floors
• Underfloor areas with open airflow

That last one gets missed often.

Cold air moving under your home can pull warmth through the floor. This is why some homes feel cold from the ground up, even with the heater running.

Homes without underfloor insulation often feel this first in bedrooms, living rooms, and older timber-floor areas.

Why Insulation Makes a Bigger Difference Than Turning the Heater Up

Turning the heater up treats the symptom.

Insulation deals with the cause.

Energy.gov.au says installing the right insulation in roofs, walls, and floors can save more than 45% on heating and cooling costs.

For example, if your winter electricity bill is $400, you could save up to $180. Suddenly, the difference feels much more tangible.

That does not mean every home gets the same result. Access, materials, climate, and installation quality all matter.

But the principle is simple.

If your home holds heat better, your heater does less work.

Draught proofing also plays a part. Air leaks alone can account for up to 25 per cent of heat loss in winter.

That’s why insulation and air sealing work best together.

Why Spray Foam Insulation Works in Real Homes

Older homes often have tricky spaces.

You might find uneven framing, tight roof areas, old batts, gaps around pipes, or underfloor spaces that are hard to reach.

Traditional insulation can work well, but it needs a clean fit. Gaps and movement reduce performance.

Spray foam insulation works differently.

Installers apply it as a liquid. It expands into gaps, sets in place, and helps reduce both heat transfer and air movement.

That makes it useful in:

• Roof spaces with awkward framing
• Underfloor areas with open airflow
• Wall cavities during renovations
• Gaps around services and penetrations

It is not the right answer for every home. But where access is difficult, or air leaks are part of the issue, spray foam can solve problems that batts often miss.

Read more: A Complete Guide to Spray Foam Insulation

source: yourhome.gov.au

Check the Areas That Cost You Most First

You do not need to upgrade the whole house in one go.

Start with the areas causing the biggest comfort problem.

If your floors feel cold, check the subfloor.
If upstairs rooms overheat and cool quickly, check the roof space.
If one room never holds temperature, look for gaps, missing insulation, or old materials.

The best starting point depends on your home.

For older homes with suspended timber floors, the subfloor often gives clear signs. Cold boards, draughts, and rooms that drop in temperature overnight usually point to the underside.

 

Source: yourhome.gov.au

Winter Tips That Go Beyond “Put On a Jumper”

Small changes won’t replace insulation, but they can help reduce energy use.

Try these, including a few you might not have considered:

• Set your thermostat between 18°C and 20°C
• Close doors to rooms you’re not using
• Open curtains during the day and close them at night.
• Seal gaps around doors, floors, and skirting boards
• Turn heaters off when they’re not needed
• Insulate hot water pipes with foam sleeves.
• Use door snakes at external and internal doors.
• Install removable window insulation film on older windows.
• Cover unused fireplaces or chimneys to stop draughts.
• Use rugs over bare floors, especially at night.

Each degree above 20°C can increase energy use by 5 to 10 per cent, so small adjustments make a difference over time.

These steps work best when your home already holds heat well.
If cold floors are part of the problem, our guide on underfloor insulation and home energy efficiency explains how the subfloor affects comfort.

When Old Insulation Stops Doing Its Job

Insulation doesn’t always fail overnight. It gradually loses performance.

Common issues include:

• Sagging or gaps
• Moisture damage
• Dust build-up
• Pest activity
• Poor original installation

Many older homes have insulation that no longer performs the way it should.

If it hasn’t been checked in years, it’s worth reviewing before winter gets colder.

A Warmer Home Starts With Less Heat Loss

If your home still feels cold even when the heater is running, the issue is usually how quickly heat is escaping.

Fixing where that heat is going often makes a bigger difference than increasing your heating.

For many Western Australian homes, especially older ones, that means better comfort, fewer draughts, and less reliance on heating.

If you want to understand where your home is losing heat and what options make sense, start by looking at the areas that matter most.

Ready to decide? Here’s what to do next

We hope this gave you a clearer picture of why your home may feel cold, even when the heater is running.

Spray foam isn’t the right fit for every home, but when used in the right areas, it can solve problems that other insulation types can’t. Knowing where it works best helps you make a more informed decision.

At Tates Coating Services, we’ve been installing spray foam insulation and polyurethane coatings across Western Australia since the 1980s. Our work covers homes, farms, commercial buildings, and industrial sites.

Whether you’re building, renovating, or improving an existing home, we can walk you through your options and help you understand what will actually make a difference.

If you want a clear answer or a quote, get in touch. No pressure. Just practical advice to help you move forward. Click here to get a free quote.

You’ve probably heard people talk about spray foam insulation.

Maybe your neighbour says their house is quieter and stays cooler, saving up to $1,000 a year on cooling costs. Or maybe you’re tired of a home that never keeps a steady temperature, even after spending on batts, curtains, and running the air conditioner.

You are not alone. Many people end up in the same spot.

Spray foam is not perfect for every home and may not always be the best option. But when designed and installed properly, it can solve problems other insulation cannot, especially in hard-to-reach places, areas with moisture issues, and spots where air leaks are common.

This guide explains what spray foam is, where it works best, how much it costs, and what to expect if you are planning an upgrade or renovation.

Let’s dive in.

What is spray foam insulation?

Polyurethane spray foam is a type of insulation that installers spray as a liquid onto surfaces. The liquid expands, sets, and hardens, forming a thermal barrier that helps keep heat in or out of a building. It also acts as an air barrier, a vapor retarder, and sometimes structural reinforcement.

Spray foam can be used for insulation in walls, roofs, attics, and underfloors. It creates an airtight seal, so drafty hallways become a thing of the past. In winter, rooms stay cosy without constantly adjusting the thermostat. In summer, your house feels cool, reducing stuffy, hot spaces. This improves your home’s energy efficiency by retaining the ambient temperature.

A chemical combination of polyol resin and isocyanate makes the hardened foam. When combined, they react and expand to 30-60 times their original liquid volume. All products are safe once applied. After installation, any early odour from the foam usually dissipates quickly with proper ventilation. The formulation minimizes off-gassing, so you can feel confident about air quality. There are no known long-term health risks once the foam has fully cured and settled.

What makes spray foam different from batts and boards?

Batts and boards can work well, but they rely on a neat fit and ideal environmental conditions. Gaps around wiring, pipes, and uneven framing can leave small air paths behind. Combined, these gaps can equal a basketball-sized hole in the average ceiling, letting conditioned air escape and increasing energy costs. Environmental conditions such as air flow and moisture in the air can significantly reduce the thermal performance of batts by up to 60%.

Spray foam fills the cavity and locks into place once it cures. It does not sag or shift like some bulk insulation can over time.

If you want a simple comparison, this article explains where spray foam and batts differ in real homes.

Read more: Should I Use Spray Foam or Batts for Insulation? Get The True Facts

So, before you make a home-changing choice, let’s run through a quick guide to the two types of spray foam insulation.

The 2 types of spray foam insulation

There are two main types of spray foam insulation: open cell and closed cell. Both come as liquids that, when mixed, create an expanding foam. Each type has particular traits. The two types are:

Open Cell Foam

Open cell foam is a good option for areas that are hard to reach or irregularly shaped. Its sound reduction properties are also a benefit in places with high traffic or aircraft noise. In Australia, there is usually no price difference between open and closed cell foam. However, in some regions or specific applications, such as high-moisture environments or where structural strength is needed, closed cell foam can be more expensive because of its superior properties.

Open cell foam is a good choice in these situations:

• This spray foam is more flexible than closed cell insulation, so it’s best in areas where movement is expected or settling is needed.
• It’s easier to use in awkward shapes, like hard-to-reach spaces around pipes or near wiring.
• Its soundproofing properties are slightly better than closed cell foam.

Closed Cell Foam

Closed cell foam creates a more effective thermal break than open cell foam. It acts like an extra layer of plywood, improving support with its rigidity and strengthening overall durability. This rigid material also keeps water out. Closed cell can be applied thinly, so it does not allow rodents to burrow in it or take up excessive space.

Closed cell spray foam insulation is denser and has a slightly higher R-value. It’s popular in residential applications such as basements, crawl spaces, and exterior walls. It’s also widely used in commercial and industrial construction. When finished, it can have a neater appearance.

Here’s why we recommend people choose closed cell spray foam insulation:

• It has a higher R-value per inch than open cell spray foam insulation, providing better thermal resistance.
• This insulation adds structural strength to a building, making it suitable for use in load-bearing walls and other areas where added strength is valuable.
• It’s highly effective in areas where air leakage is a concern.
• Closed cell is resistant to moisture and should help prevent mould growth in crawl spaces and basements.
• It’s more durable than open cell spray foam insulation and more robust in high-traffic areas.
• It can be applied at minimal thickness, taking up less space and stopping rodents from making a home in it.

Cost factor	Open-cell foam	Closed-cell foam
R-value per inch*	0.65	1.11
Expansion	Expands 1000%	Expands 300%
Density (per m3)	10 Kg / m3	32-40 Kg / m3
Moisture barrier	Semi-permeable	Impermeable
Vapor retardant	Semi-permeable	Impermeable
Sound dampening	Excellent	Good

* R-Values fluctuate depending on specific product utilised.

Read more: Open Vs. Closed Cell Foam – A Must-Read Comparison Guide

How does spray foam insulation work?

Spray foam insulation starts as two liquids that mix at the spray gun. Once sprayed onto a surface, the materials react and expand quickly, filling the space you want to insulate.

As the foam expands, it pushes into small gaps and cracks that batts and boards often miss. Then it cures and bonds to the surface, forming one continuous layer of insulation.

Installers build up the final thickness in passes. This helps control depth and coverage, especially in roof spaces, wall cavities, and underfloor areas where framing and services make neat fitting difficult.

The practical benefit is that spray foam does two jobs at once. It slows heat flow and reduces unwanted air movement through the insulated area. That sealing effect is why spray foam can feel different in daily comfort compared to insulation that only fills a cavity.

Now that you know how spray foam works, let’s look at what that actually means in a real home. Here are the main benefits people notice once it’s installed.

The benefits of spray foam insulation

Spray foam insulation offers many benefits for homeowners, which is why more people in Australia are choosing it. Here are the main reasons to consider spray foam insulation:

• Increased Energy Efficiency: Spray foam insulation helps keep heat inside during winter and blocks it out during summer, lowering your energy bills. Its higher R-value compared to most traditional insulation keeps your home’s temperature steady.
• Environmental Protection: Manufacturers make spray foam from polyurethane without ozone-depleting chemicals, making it safe for the environment. Its durability means less waste over time. Compared to traditional insulation like batts, spray foam can lower greenhouse gas emissions by up to 30% over its lifetime, reducing your home’s environmental impact.
• Increased Comfort and Indoor Air Quality: Spray foam insulation creates an airtight seal that stops drafts and keeps your home’s temperature steady. It also helps keep out dust, allergens, and other pollutants, making the air inside your home cleaner. This is especially helpful for people with allergies or breathing problems.
• Longevity and Durability: Spray foam is tough and stands up well to water, mold, and pests. Unlike other insulation that can sag or settle, spray foam stays effective for decades. When installed correctly, it can last up to 80 years, giving your home long-term protection and support.
• Superior Soundproofing: Because spray foam is dense and expands to fill gaps, it helps block out noise. This makes it a good choice if you live in a noisy area or want a quieter home.
• Seamless Installation and Versatility: Spray foam sticks to uneven surfaces and fills all the gaps, leaving no spots uncovered. This makes it useful for many parts of your home, like roofs, walls, and under floors.

One of the best things about spray foam is that it creates a solid barrier against air and moisture. This not only helps save energy but also makes your home stronger. Because it covers everything, you won’t have to worry about leaks, drafts, or cold spots that can happen with other insulation.

Choosing spray foam insulation makes your home more comfortable, energy-efficient, and environmentally friendly. You can save on heating and cooling bills, help the environment, and make your home healthier. For example, cutting your energy bill by 25% each year could add up to big savings over a decade. Think about what you could do with that extra money.

1. Site Preparation

Before any spraying begins, installers must prep the area.

Installers will:

• Clear the work zone of loose debris and personal items.
• Look for moisture problems or structural issues.
• Cover nearby surfaces and windows to protect from overspray.
• Check access to the areas being treated, like roof voids, underfloors, or cavities.

You may be asked to vacate the space during this part if the work zone is inside the home. You should also keep pets away from the site.

If the project involves a new build or renovation, the space needs to be weather-tight but not lined. If you’re retrofitting, installers may need to remove partial walls or ceilings, depending on the access points.

2. Application of Spray Foam

Once the area is ready, installers suit up and start the process.

• Installers apply spray foam on-site using specialised equipment responsible for mixing two liquid components: polyol and isocyanate.
• The installer sprays the foam directly into the cavity or onto the surface.
• The foam expands rapidly to fill gaps and sets in place within seconds.

Installers apply it in layers or passes to manage expansion and achieve the right thickness.

Expect some noise from the pump and compressor setup. It’s not loud enough to cause damage, but it might be noticeable if you’re nearby.

3. Curing and Ventilation

Spray foam sets quickly, but it still needs time to cure completely.

• Most modern formulations are touch-dry within seconds.
• Full curing takes only minutes , depending on conditions.
• Ventilation is important during and after application to disperse any chemical odours.

Installers may recommend staying out of the space for a few hours after the job finishes. If it’s a large area or enclosed zone, they’ll often use extraction fans to speed up the process.

Once cured, the foam is inert and safe.

4. Access and Re-entry

For residential jobs, you might need to stay out of affected rooms for a short period — usually around 2 to 24 hours, depending on the scale and location.

In commercial or new build settings, this isn’t usually a concern since other work is happening around the insulation.

If installers are working underfloor or in roof spaces, they may restrict re-entry to those areas until they give the all-clear.

5. Aftercare and Clean-Up

Professional teams will tidy up once the foam is in place. You should not have to deal with overspray, leftover drums, or mess.

What they’ll check before leaving:

• Foam thickness and coverage
• Seal integrity
• Signs of shrinkage or pull-away (rare but needs correction if it happens)
• Access points are safely closed or secured.

Installers may advise you to avoid painting or drilling into the foamed area for a set period. If you plan to line or cover the area, ask about any wait times or product compatibility.

How much does spray foam insulation cost?

The cost of spray foam insulation varies depending on factors like the type of spray foam, area to cover, R-value, and labour costs. Other variables can affect the overall cost, but we’ll get into that shortly. First, here’s a ballpark estimate of your required investment.

Australians can expect to pay $1,800-$7,000 for spray foam insulation installation. .

The cost of installing insulation under floors or in ceiling areas is around $35-$40/m² but is always relevant to the customers desired thickness of application, and from $35/m² for walls in Australia depending on method of application. The difficulty of installation determines the cost. An average home in Western Australia is 214.18m². Here’s what you can expect to pay to insulate a ceiling or floor depending on your home type.

Home type	Size square meters	Average Cost
Apartment	50	$1750
Small house	125	$4375
Mid-size house	200	$7000
Large house	250	$8750

Spray foam insulation contractors often provide an all-inclusive price, but check this carefully before accepting an offer. Some companies add labour costs ranging from $50-$80 per hour.

While this investment is higher than common varieties like batts, the advantages should outweigh upfront costs over time. Spray foam’s superior insulating properties and long lifespan are important to consider.

Read more: Should I Use Spray Foam or Batts for Insulation? Get The True Facts

Factors that affect the cost of spray foam insulation

• Type of foam: There are two main spray foam insulation types: open cell and closed cell. Both come as liquids that, when mixed, create an expanding foam.   These different foams then contain varying properties that can then be utilised and considered when applying to each scope of work. .
• Size of home: The area to insulate has a significant impact on project costs. A larger home requires more insulation materials and additional labour. Complex architectural features, such as vaulted ceilings or multiple levels, can also make the job more time-consuming.
• R-value: R-value measures a material’s thermal resistance or insulating ability. The higher the R-value, the more effective and expensive the product will be.
• Cladding: The type of cladding used on a building impacts installation costs in terms of accessibility, potential damage, and compatibility. It also dictates whether the installer needs to drill holes to access the space.
• Climate: It is often more expensive to install spray foam insulation in areas that reach extremely high or low temperatures.
• New vs. old home: Insulation costs are typically lower if it’s a new home being built. There is unrestricted access to recesses that are much harder to reach in a completed house.
• Space availability: Areas like tight crawl spaces make installing insulation more difficult and time-consuming, which increases the overall cost.
• Labour costs: These may vary depending on who provides the service and their experience level.
• Other costs: Additional costs, such as equipment and permits, could also affect the overall project budget.

Tip: Try to budget an additional 7-15% on top of what our calculator gives. Difficult configurations, patterns, and added complexity will increase costs.

DIY spray foam insulation cost

Some homeowners choose the DIY route to install spray foam insulation. Take extreme care if you choose this option, as incorrectly mixed chemicals can cause harm. Always follow safety best practices and read the manufacturer’s instructions carefully.

You can purchase spray foam insulation kits from reputable providers, and they’re more affordable than hiring an expert installer. A 40L Polyurethane Foam Mix Kit will cost around $900-$1,000 as a retail product.

These take-home kits usually include:

• Quick-cure polyurethane foam
• A dispensing spray gun
• An ISO (A) cylinder
• Spray fan nozzles
• Polyol (B) cylinder
• Cone spray nozzles
• A gun hose

A standard kit should allow you to insulate an area of 18.6m² at a thickness of 25 mm.

Read more: The Real Truth Behind DIY Home Insulation Kits.

What is the best time of year for insulating your house?

There’s no bad time to insulate, but the best time depends on your location and goals.

Here’s a breakdown:

Summer (Ideal for Winter Prep):

1. Get ahead of the winter rush.
2. Insulate before the cold arrives.
3. Best for underfloor insulation to reduce winter chills.

Winter (Ideal for Summer Prep):

1. Install ceiling and roof insulation before the summer heat hits.
2. Spray foam works well in colder weather.
3. Avoid the spring and summer demand surge.

According to Energy.gov.au, sealing air leaks and upgradinginsulation before winter can reduce energy use by up to 45%, providing significant savings for Australian homes.

How to choose the right insulation contractor

Choosing the wrong insulation contractor often costs more later. Poor workmanship leads to draughts, moisture problems, and higher energy bills. Fixing these mistakes can be expensive.

Whether you’re building new or upgrading your home, the right installer should make things straightforward.

Here’s how to choose the right insulation contractor:

Qualifications and Compliance
Look for someone trained in spray foam systems and who understands ICANZ, BCA, and safety rules. General trade experience is not enough.

Experience Across Projects
Each site has different needs. Ask if they’ve worked on homes, commercial sites, or agricultural sheds like yours. A contractor with broad experience is more likely to manage challenges without delay.

Product Knowledge
They should clearly explain the products they use, how long they last, and whether they meet Australian standards. They should also provide information about warranty coverage and any aftercare services. This will help you understand what to expect in terms of product service life and maintenance. Ask if the product suits your climate and building type.

Transparent Pricing and Advice
Contractors should provide itemised and transparent quotes. A professional will explain potential costs and give you time to make a decision.

Reputation and Reviews
Genuine feedback matters. Look for verified reviews and real project examples. Case studies or photos confirm they’ve done similar work before.

Safety and Jobsite Readiness
Installers must carry insurance and follow correct safety procedures. They should work neatly and safely around other trades as needed.

Education, Not Just Installation
The best contractors take time to explain how insulation works, what to expect, and which options make sense for your home.

Red Flags to Watch For
Be cautious if they give vague answers, avoid showing past work, or push for quick decisions. A good contractor gives clear information and builds trust from the start.

Ready to decide? Here’s what to do next

We hope this guide gave you the clarity you were looking for.

Spray foam isn’t the answer for every build, but when used correctly, it solves problems other insulation types can’t. Whether you’re still weighing it up or already planning your next steps, knowing how it works and where it fits makes a difference.

At Tates Coating Services, we’ve been installing spray foam insulation and polyurethane coatings across Western Australia since the 1980s. Our work spans homes, farms, retail spaces, and industrial sites. Clients include names like BHP, ALCOA, FMG, and McDonald’s, but we’re just as committed to helping homeowners get it right the first time.

Whether you’re building, renovating, or retrofitting, our experienced team can walk you through your options. We’ll help you understand what’s possible, what to avoid, and what’s worth spending on.

If you’d like a quote or need a straight answer before making a decision, we’re here to help. No pressure. No sales pitch. Just the facts you need to plan with confidence. Click here to get a free quote.