- 4.9 on Google
- 4.7 on Trustpilot
- 9.87/10 on Checkatrade
- 20+ years’ experience
- Free survey
- 40-mile radius
Home / Services / External wall insulation
External wall insulation in Nottingham
Insulation goes on the outside of your walls, finished in a silicone render in the colour you choose. Warmer rooms inside and a house that looks new from the street.
Free survey · insulated render · the colour you choose
Is it time?
Could your walls be the problem?
Older homes with solid walls have no cavity to fill, so the warmth goes straight through.
Cold rooms and cold walls
Walls that feel cold to the touch, and rooms that never warm up.
Damp or condensation
Cold walls can encourage condensation inside the house.
High heating bills
Heat escaping through the walls means the heating has to work harder.
Tired render or brick
Failing render or worn pebbledash, and a house you’d like to look better.
What you get
How does external wall insulation go on?
The insulation goes on the outside, so you don’t lose any room space and we don’t need to work inside.
- A free survey of the walls and the fixings they need
- Scaffold put up and windows protected
- Insulation boards, usually 90mm
- Mechanical fixings through to the wall
- Render over the boards
- A silicone finish in your choice of colour
- Scaffold down and the site cleared
You can’t inspect it afterwards
Once it’s rendered, the fixings and boards are out of sight. That’s why what’s covered is set out in your quote, before you decide anything.
Four steps, no surprises
What happens on a wall insulation job?
No call centre and no pushy sales visit. Just this.
- 01
Free survey
We check the walls and talk through colours and finishes.
- 02
A written quote
You get what’s included and the render colours to choose from, before you decide anything.
- 03
Boards, render, finish
Insulation goes on and gets fixed back, then the render and silicone finish.
- 04
Checked before you pay
The scaffold comes down, we clean up and check you’re happy before you pay.
Our guarantee
What our guarantees cover*
Once the job’s finished, you can’t see what’s underneath. So what’s covered is set out in your quote, before you decide anything.
- New roofs: 10-year workmanship guarantee
- Tiled roof repairs: 12-month guarantee
- EPDM flat roofs: workmanship and materials covered
- £1m public liability insurance
More of our work
More houses: before & after
A few more jobs. Drag the handle to compare.
Our work
More houses by our team
Reviews
What our customers say
Our 48 reviews, from Google, Trustpilot & Checkatrade.
4.7 stars · 48 reviews
“Great experience, came on time, good communication. They worked well and did a good job and cleaned up well before they left. The roof looks great, and we now have a conservatory that we can use all year round. Lovely company to deal with.”
“Very impressed from start to finish. No hard sell, got a quote and was left to us to decide. We decided to have the conservatory roof insulated on the inside. Looks amazing. The fitters arrived early and straight onto the job, and left everything clean and tidy!”
“Excellent service. Clear quote, efficient team, high quality work completed quickly despite awful weather. Very impressed!!”
“Absolutely brilliant from sales to finishing the installation. Great job all done in six hours. The site was cleared and cleaned up. You wouldn’t know they had been except for a great new roof on our conservatory. If we could award ten stars we would. Highly recommended.”
“Great job done boarding our loft by a polite and tidy team. Happy to recommend.”
“Very satisfied with Cozy Top, excellent work, staff would recommend this company to do a good job, would deal with this company again.”
“Following a visit by the Director of Cozy Top Home, to discuss the best options for my conservatory roof. I placed the order, the Surveyor visited and he explained in full detail how the work would be carried out. The two fitters turned up at the time advised, and worked non stop, they did an excellent job, and tidied up after them. I am extremely pleased with the service provided, and would recommend them.”
“The entire team is brilliant. Gareth came in and provided a free quote, clearly explaining the entire process. David and Mark arrived early in the morning and completed the work within just 4 hours. The work was carried out very professionally and meticulously.”
“We started with the Estimator/Sales Gareth who was very helpful, friendly and discussed how the work would be done. The work was carried out with 2 brothers who had a good work ethic, got on with the job with precision and cleanliness. On completion we had a visit from the company work inspector to check we were happy with the work done.”
Written reviews from this platform are on its own page — use the button above to read them.
Where we work
External wall insulation near you
Based in Nottingham, covering homes up to about 40 miles around. Pick your town to see the homes and jobs we see most there.
FAQs
Common wall insulation questions
Yes, usually for the better. The insulation goes on the outside of the walls and is finished in a silicone render in the colour you choose, so a tired pebbledash or brick house looks freshly done from the street. We show you the colours before you decide, and nothing changes inside.
We usually fit 90mm insulation boards, fixed to the outside walls, then a render coat and a silicone finish over the top. The silicone finish comes in many colours and sheds dirt and rain well. We confirm the right thickness for your house at the survey.
No. External wall insulation goes entirely on the outside of the house, so you don’t lose any room inside and the work doesn’t disrupt your rooms. That’s the main difference from internal wall insulation, which takes space from every room it’s fitted in.
It suits homes with solid walls in particular, such as older terraces and many pre-war houses, which have no cavity to fill and lose heat fast. Some homes need planning permission, especially in conservation areas or on the front of the house. The free survey confirms whether it suits yours.
Every house is priced after a free survey, because its size, the windows and doors, and details such as pipes and sills all change the figure. You get the price and the render options together, so you can see what the finished house will look like. There’s no obligation to go ahead.
Reviewed by Anthony Harrison, Co-owner, 20 years in the trade, 13 of them in roofing and insulation. Updated November 2026.
Get the roof sorted, and the heat kept in
Tell us what’s going on with the roof or the conservatory. We’ll come out, look properly and talk you through the options. The survey costs nothing.