Up to 35% of your home's heat escapes straight through uninsulated cavity walls. One day's work changes that permanently — and the savings start from the very first bill.
Cavity wall insulation isn't just about saving money — though the savings are real. Here is everything that improves from the day the work is done.
Stop paying to heat the outdoors. Insulated walls keep warmth inside — and money in your pocket from the very first heating season.
No more cold walls or rooms that just won't warm up. Your home reaches temperature faster and holds it longer — without working your boiler harder.
Energy-efficient homes attract higher sale prices and move faster. A certified installation is a permanent, verifiable improvement to your EPC rating.
Every installation is certified under PAS 2035 and backed by a 25-year CIGA guarantee. Fully documented and transferable when you sell.
The average installation saves over 560kg of CO₂ per year. A meaningful environmental contribution that costs you nothing extra to maintain.
Cavity wall insulation works both ways — it keeps heat out in summer as well as in during winter. Comfortable all year, not just in the cold months.
Cavity wall insulation works differently depending on what you need. Here is what it means for each type of property owner.
Most homeowners notice the difference within days of installation — rooms that were always cold become comfortable, and the boiler works less hard to maintain temperature.
All work is carried out from outside your property. No interior access, no scaffolding, no mess indoors. Most homes are completed in 3–5 hours.
A higher EPC rating is a documented improvement that shows up in valuations. Energy efficient homes sell faster and at better prices.
We send a certified surveyor to assess your property at no cost. If your home isn't suitable, we'll tell you straight. No pressure to proceed.
EPC E is already the legal minimum for all rental properties. Cavity insulation typically improves ratings by 1–2 bands — often enough to ensure compliance.
All work is done from outside — tenants don't need to leave or change their routine. Installations can also be scheduled around tenancy changeovers.
Managing multiple properties? We co-ordinate surveys and installations across your entire portfolio. Speak to us about your specific requirements.
Tenants in warmer, more efficient properties spend less on heating — reducing complaints and improving your retention rates.
Commercial heating bills are significant. Cavity wall insulation typically reduces heating costs by 15–20% — a meaningful saving at commercial scale.
A better EPC rating affects mortgage terms, lease values, and planning decisions. Every improvement is certified and permanently documented.
Work is timed around your hours — evenings, weekends, or holiday closures. All from outside the building, so your business keeps running.
Our installation partner works with all commercial property types — from single offices to multi-site portfolios and housing association estates.
From your first enquiry to a fully insulated, certified property — here is exactly what happens at every stage.
Fill in the quick form or give us a call. Takes 60 seconds and there's no obligation.
⏱ 60 secondsOur certified installation partner calls you within 24 hours to discuss your property.
⏱ Within 24 hoursA certified surveyor visits your property and confirms suitability. No obligation to proceed.
⏱ Around 30 minsAll work done from outside. Small holes drilled, insulation injected, holes sealed. Done in a day.
⏱ Most homes: 1 dayPAS 2035 certificate and 25-year CIGA guarantee issued on completion day.
⏱ Guaranteed 25 yearsFree, no obligation. You'll hear back within 24 hours.
Use our quick calculator to get a rough idea of your annual saving. The free survey will give you a precise figure for your specific property.
Indicative estimate only. Based on 15–20% reduction in heating costs. Actual savings vary by property.
Genuine feedback from customers whose properties were insulated through CavityTherm UK by First Choice Energy Ltd.
"Our house always felt cold in the winter no matter how much we had the heating on. After getting cavity wall insulation installed, the difference was really noticeable. The walls don't feel cold anymore and the house warms up much quicker. We're already seeing lower heating usage and the whole place just feels more comfortable."
"We decided to have cavity wall insulation installed after hearing it could help reduce energy bills. The process was quicker than we expected and there was very little disruption. Since having it done, the house keeps heat much better and we've definitely noticed a drop in how often the heating needs to be on."
"Our property is an older house and some rooms were always colder than others. After installing cavity wall insulation, the temperature feels much more even throughout the house. It's made a big difference to comfort, especially during colder evenings."
Get a free quote today. You'll hear back within 24 hours.