Your Canberra home does not have to be freezing cold over the icy winter or roasting hot in the Canberra summer.

No matter the age of your home, there is a high-performance retrofit insulation solution available.

Our engineered blow-in wall insulation systems are designed to keep you Snug and Sound year round.

Available exclusively through Alexander Watson, the Supafil wall insulation range is the only independently certified product on the market to give you guaranteed performance and peace of mind. 

There is a simple solution to your wall insulation woes…

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Hear from our delighted past clients…

Very prompt and polite. Always called before coming. Good quote. The guys installing did a great job plus insulated a bulkhead that wasn’t in the quote. Further put in fan seals so they had to get back on the cavity. Amazing service. Plus the job looks perfectly complete.

Rob Narel, Duffy, ACT

I’m very impressed with the results – my house is 10-12 degrees cooler since I had my roof and walls insulated In September. Today with temperatures outside around 40 degrees the inside thermometer is showing 28 and I haven’t turned in the aircon! Staff at the office and installation team were a pleasure to deal with – very professional and efficient.

Lilian Prdjan, McKellar, ACT

Very responsible attitude, giving me a reminder of booking in time. Boys on site are hard working!

Ann Yan, Red Hill, ACT

The team at Alexander Watson were exceptional, very professional from first quote to final install. They did under floor spray foam insulation, it’s fantastic.

Liam Hart, Scullin, ACT

The boys came out during a Canberra arctic blast and sprayed our van. Highly recommend. Great customer service and the product speaks for itself.

Martina Johnson, Murrumbateman, NSW

Great job, efficient staff, pleasant, competent and a great price for foam insulation under my deck. A big difference to the room. Thanks Alexander Watson! JT

Jonathan Taylor, Melba, ACT

I just had wall and ceiling insulation, as well as removal and clean up of old insulation completed from the team at Alexander Watson. The office staff were so professional and responsive with their communication throughout. Their prices were competitive and the team who installed were really friendly and efficient. We’ve just had our first series of cold days/nights in Canberra and I can feel the difference already. Thanks guys! Highly recommend you.

Jen Margules, Weston, ACT

Had the walls in an old 1897 house done by these guys last week. best money I have spent. Temp has gone up in the affected rooms by at least 8° and I now have even temperatures through the whole house. Even had to turn the heater down, will make a huge difference on energy costs. The installers were professional and knowledgeable and the whole job went like clockwork. Job well done on all levels. thank you.

Julie Hays, Queanbeyan, NSW

Hard workers. Cleanliness was paramount. Under estimated the work to be done but stayed after hours to make sure the job was completed. House so warm now.

Roy Volmari, Hawker, ACT

We have been extremely impressed with the service we received from Alexander Watson.
The whole team have been super friendly and professional. The work carried out at our home was completed on time without any mess whatsoever, they all did a fantastic job and we cannot believe the difference it has made in the temperature of our house, highly recommend Alexander Watson!

Suzie Walden, Kaleen, ACT

Really great service, care and attention to detail. Fantastic after-care as well. Couldn’t recommend highly enough, especially if you’re doing a retrofit!

Rachael Thoms, Casey, ACT

Excellent service provided by cooperative and friendly business. I would have no hesitation recommending them.

Paul Hill, Flynn, ACT

Very prompt and polite. Always called before coming. Good quote. The guys installing did a great job plus insulated a bulkhead that wasn’t in the quote. Further put in fan seals so they had to get back on the cavity. Amazing service. Plus the job looks perfectly complete.

Fiona Engeler, Ngunnawal, ACT

We would highly recommend Alexander Watson for home insulation. They have just retrofitted under floor, wall and ceiling insulation to our 1960’s home And have already noticed our central heating reduce the amount of time it kicks in. Their service before and after has been sterling and couldn’t ask for anything more. They may be a bit pricier then some others but you really get what you pay for.

Kate Lyall, Garran, ACT

Brilliant service – prompt and efficient from the girls on the phone to the chaps who did our job. Appreciate everyone’s efforts (travel etc) excellent service!

Lynne Arnold, Cudmirrah, NSW

Great service and already feeling the difference.
The guys who came out were great and explained everything perfectly.
Definitely will be recommending.

Alan Horner, Higgins, ACT

I cannot recommend Alexander Watson Insulation any higher. We were really well looked after in terms of competitive pricing and the whole team were so lovely to work with. We had our insulation installed this week and the difference is already outstanding. We have had our heater on every evening since moving into our new home and since having the insulation in, it is the first time we didn’t have to turn it on.

Ashley Thompson, Macgregor, ACT

Already noticed the difference with a few freezing nights. The staff were professional, informed us what they were doing. Thanks!

Tim Lipscombe, Kambah, ACT

Excellent service provided by cooperative and friendly business. I would have no hesitation recommending them.

Paul Hill, Flynn, ACT

Very prompt and polite. Always called before coming. Good quote. The guys installing did a great job plus insulated a bulkhead that wasn’t in the quote. Further put in fan seals so they had to get back on the cavity. Amazing service. Plus the job looks perfectly complete.

Fiona Engeler, Ngunnawal, ACT

We would highly recommend Alexander Watson for home insulation. They have just retrofitted under floor, wall and ceiling insulation to our 1960’s home And have already noticed our central heating reduce the amount of time it kicks in. Their service before and after has been sterling and couldn’t ask for anything more. They may be a bit pricier then some others but you really get what you pay for.

Kate Lyall, Garran, ACT

Brilliant service – prompt and efficient from the girls on the phone to the chaps who did our job. Appreciate everyone’s efforts (travel etc) excellent service!

Lynne Arnold, Cudmirrah, NSW

Great service and already feeling the difference.
The guys who came out were great and explained everything perfectly.
Definitely will be recommending.

Alan Horner, Higgins, ACT

I cannot recommend Alexander Watson Insulation any higher. We were really well looked after in terms of competitive pricing and the whole team were so lovely to work with. We had our insulation installed this week and the difference is already outstanding. We have had our heater on every evening since moving into our new home and since having the insulation in, it is the first time we didn’t have to turn it on.

Ashley Thompson, Macgregor, ACT

Already noticed the difference with a few freezing nights. The staff were professional, informed us what they were doing. Thanks!

Tim Lipscombe, Kambah, ACT

Very prompt and polite. Always called before coming. Good quote. The guys installing did a great job plus insulated a bulkhead that wasn’t in the quote. Further put in fan seals so they had to get back on the cavity. Amazing service. Plus the job looks perfectly complete.

Rob Narel, Duffy, ACT

I’m very impressed with the results – my house is 10-12 degrees cooler since I had my roof and walls insulated In September. Today with temperatures outside around 40 degrees the inside thermometer is showing 28 and I haven’t turned in the aircon! Staff at the office and installation team were a pleasure to deal with – very professional and efficient.

Lilian Prdjan, McKellar, ACT

Very responsible attitude, giving me a reminder of booking in time. Boys on site are hard working!

Ann Yan, Red Hill, ACT

The team at Alexander Watson were exceptional, very professional from first quote to final install. They did under floor spray foam insulation, it’s fantastic.

Liam Hart, Scullin, ACT

The boys came out during a Canberra arctic blast and sprayed our van. Highly recommend. Great customer service and the product speaks for itself.

Martina Johnson, Murrumbateman, NSW

Great job, efficient staff, pleasant, competent and a great price for foam insulation under my deck. A big difference to the room. Thanks Alexander Watson! JT

Jonathan Taylor, Melba, ACT

I just had wall and ceiling insulation, as well as removal and clean up of old insulation completed from the team at Alexander Watson. The office staff were so professional and responsive with their communication throughout. Their prices were competitive and the team who installed were really friendly and efficient. We’ve just had our first series of cold days/nights in Canberra and I can feel the difference already. Thanks guys! Highly recommend you.

Jen Margules, Weston, ACT

Had the walls in an old 1897 house done by these guys last week. best money I have spent. Temp has gone up in the affected rooms by at least 8° and I now have even temperatures through the whole house. Even had to turn the heater down, will make a huge difference on energy costs. The installers were professional and knowledgeable and the whole job went like clockwork. Job well done on all levels. thank you.

Julie Hays, Queanbeyan, NSW

Hard workers. Cleanliness was paramount. Under estimated the work to be done but stayed after hours to make sure the job was completed. House so warm now.

Roy Volmari, Hawker, ACT

We have been extremely impressed with the service we received from Alexander Watson.
The whole team have been super friendly and professional. The work carried out at our home was completed on time without any mess whatsoever, they all did a fantastic job and we cannot believe the difference it has made in the temperature of our house, highly recommend Alexander Watson!

Suzie Walden, Kaleen, ACT

Really great service, care and attention to detail. Fantastic after-care as well. Couldn’t recommend highly enough, especially if you’re doing a retrofit!

Rachael Thoms, Casey, ACT

The boys came out during a Canberra arctic blast and sprayed our van. Highly recommend. Great customer service and the product speaks for itself.

Martina Johnson, Murrumbateman, NSW

Great job, efficient staff, pleasant, competent and a great price for foam insulation under my deck. A big difference to the room. Thanks Alexander Watson! JT

Jonathan Taylor, Melba, ACT

I just had wall and ceiling insulation, as well as removal and clean up of old insulation completed from the team at Alexander Watson. The office staff were so professional and responsive with their communication throughout. Their prices were competitive and the team who installed were really friendly and efficient. We’ve just had our first series of cold days/nights in Canberra and I can feel the difference already. Thanks guys! Highly recommend you.

Jen Margules, Weston, ACT

Had the walls in an old 1897 house done by these guys last week. best money I have spent. Temp has gone up in the affected rooms by at least 8° and I now have even temperatures through the whole house. Even had to turn the heater down, will make a huge difference on energy costs. The installers were professional and knowledgeable and the whole job went like clockwork. Job well done on all levels. thank you.

Julie Hays, Queanbeyan, NSW

Hard workers. Cleanliness was paramount. Under estimated the work to be done but stayed after hours to make sure the job was completed. House so warm now.

Roy Volmari, Hawker, ACT

We have been extremely impressed with the service we received from Alexander Watson.
The whole team have been super friendly and professional. The work carried out at our home was completed on time without any mess whatsoever, they all did a fantastic job and we cannot believe the difference it has made in the temperature of our house, highly recommend Alexander Watson!

Suzie Walden, Kaleen, ACT

Really great service, care and attention to detail. Fantastic after-care as well. Couldn’t recommend highly enough, especially if you’re doing a retrofit!

Rachael Thoms, Casey, ACT

Excellent service provided by cooperative and friendly business. I would have no hesitation recommending them.

Paul Hill, Flynn, ACT

Very prompt and polite. Always called before coming. Good quote. The guys installing did a great job plus insulated a bulkhead that wasn’t in the quote. Further put in fan seals so they had to get back on the cavity. Amazing service. Plus the job looks perfectly complete.

Fiona Engeler, Ngunnawal, ACT

We would highly recommend Alexander Watson for home insulation. They have just retrofitted under floor, wall and ceiling insulation to our 1960’s home And have already noticed our central heating reduce the amount of time it kicks in. Their service before and after has been sterling and couldn’t ask for anything more. They may be a bit pricier then some others but you really get what you pay for.

Kate Lyall, Garran, ACT

Brilliant service – prompt and efficient from the girls on the phone to the chaps who did our job. Appreciate everyone’s efforts (travel etc) excellent service!

Lynne Arnold, Cudmirrah, NSW

Great service and already feeling the difference.
The guys who came out were great and explained everything perfectly.
Definitely will be recommending.

Alan Horner, Higgins, ACT

I cannot recommend Alexander Watson Insulation any higher. We were really well looked after in terms of competitive pricing and the whole team were so lovely to work with. We had our insulation installed this week and the difference is already outstanding. We have had our heater on every evening since moving into our new home and since having the insulation in, it is the first time we didn’t have to turn it on.

Ashley Thompson, Macgregor, ACT

Already noticed the difference with a few freezing nights. The staff were professional, informed us what they were doing. Thanks!

Tim Lipscombe, Kambah, ACT

Very prompt and polite. Always called before coming. Good quote. The guys installing did a great job plus insulated a bulkhead that wasn’t in the quote. Further put in fan seals so they had to get back on the cavity. Amazing service. Plus the job looks perfectly complete.

Rob Narel, Duffy, ACT

I’m very impressed with the results – my house is 10-12 degrees cooler since I had my roof and walls insulated In September. Today with temperatures outside around 40 degrees the inside thermometer is showing 28 and I haven’t turned in the aircon! Staff at the office and installation team were a pleasure to deal with – very professional and efficient.

Lilian Prdjan, McKellar, ACT

Very responsible attitude, giving me a reminder of booking in time. Boys on site are hard working!

Ann Yan, Red Hill, ACT

The team at Alexander Watson were exceptional, very professional from first quote to final install. They did under floor spray foam insulation, it’s fantastic.

Liam Hart, Scullin, ACT

It’s a simple process…

Plugging The Wall Cavity

Preventing the insulation from falling out the bottom of the cavity.

ENSURING A PERFECT FILL...

When we undertake a wall insulation installation the very first step is to plug the wall cavities if the house is built on a suspended timber floor. This prevents the wall insulation from falling out the bottom of the wall cavity. This obviously is not required for houses that are constructed directly onto a slab. This also ensures the walls are filled gap free.

Filling From Above

Easy access through the roof tiles for minimal fuss.

A QUICK AND EASY PROCESS...

After the cavities have been plugged the wall cavity is filled from above. Roof tiles are removed to gain access to the cavity and using a lay flat style hose the product is pumped into the wall cavity and it is filled from the bottom, the operator then lifts the hose and continues to fill the cavity until the product has reached the top of the wall cavity.

Filling Under The Windows

Hard to reach areas are filled through a 16mm hole in the mortar joint.

ALL AREAS ARE EASILY FILLED...

Areas under windows that cannot be filled from above are filled by gaining access through a 16mm hole drilled through the mortar joint. The drill is small enough to only go through the mortar and in most cases not effect the brick work. The product is then pumped into the wall cavity under the window through these holes after which the holes are patched.

Thermal Camera Check

Ensuring we can offer our gap free guarantee.

THERMAL IMAGE GUARANTEE...

Once the wall cavities have been completely filled from above and under the windows the last step in ensuring a perfect installation is doing a thorough thermal camera check. This ensures uniform coverage throughout and in the unlikely event any areas not being completely filled this shows up clearly and these gaps can be easily topped up.

Our team are waiting to transform the comfort of your home…

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Need to find out more? Get all the information in our installation guide

Never suffer at the hands of a freezing cold Winter or blistering hot Summer again…

Retrofitting high performance ceiling, wall and floor insulation will turn your uncomfortable home into a year round pleasure to live in.

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