Insulation & Building Fabric Specialists – Replacement Windows & Doors – Solar, Batteries & EV Points
Up to a quarter of a typical UK home's heat escapes through an under-insulated roof, and more still through draughty walls, floors and windows. We design and install the fabric upgrades that keep the heat where you paid for it — inside, keeping you and your family warm and comfortable. Loft, cavity and solid wall insulation, underfloor insulation, ventilation and energy-efficient windows and doors also save you ££££. They're also great in the summer at keeping you cool too!
Heat loss costing ££££
We offer free, no-obligation home assessments to identify how you can improve the energy efficiency of your home. Upgrading your home can save you ££££ · We are an award winning, friendly fabric company. TrustMark & RECC registered · Fully Insured · Funded options may be available.
What We Install
From the roof down to the floor, each of these measures plays a different part in stopping heat loss and damp. We assess your whole property and recommend only what it actually needs.
Topped-up or fresh mineral wool laid between and over joists — usually the fastest payback of any home improvement.
Check your loftRaised, boarded storage decking fitted over your insulation so you don't have to sacrifice loft storage to stay warm.
Ask about boardingInsulating material injected into the gap between brick layers — minimal disruption, typically done in half a day.
Check your wallsInternal or external wall insulation for older, solid-brick properties that can't take a cavity fill.
Find out moreWarm or cold deck insulation systems for extensions, garages and flat-roofed properties.
Find out moreFitted beneath suspended timber floors to stop cold air and draughts rising into living spaces.
Find out moreModern double or triple glazing and insulated doors that cut draughts and heat loss at every opening.
Find out moreBackground and mechanical ventilation that keeps a newly airtight, well-insulated home healthy and condensation-free.
Find out moreSafe, specialist removal of old or problem spray foam insulation, restoring your roof to a mortgageable condition.
Find out moreLaunching Soon
We're expanding beyond the building fabric. Soon you'll be able to add solar panels, battery storage and EV charge points through the same accountable team that insulates your home — one company, one point of contact, from first survey to final sign-off.
Generate your own clean electricity and lean less on the grid, with a system sized around how your home actually uses energy.
Store the solar you make by day and use it after dark — keeping more of your own power instead of selling it back cheaply.
Fast, safe home charging fitted by certified electricians, ready for today's electric cars and tomorrow's.
Want to be first to know? Register your interest and we'll let you know the moment these go live.
Register your interestWhat our customers say
Real feedback from real installs — loft, wall and underfloor insulation across the country.
This company did internal wall insulation at my mum’s house. The installers were excellent and caused minimal disruption for such a major project — would definitely recommend them.
The work carried out in my property was first class. They were very professional in every way, from setting up at the start to cleaning up after finishing the job. They kept us updated from start to finish and were very respectful throughout.
Excellent service from start to finish — left everything neat and tidy, with no mess anywhere. Very polite workmen, as well as administration staff. They started work exactly when I was told and completed it all in a day. Cannot fault the company.
Very professional service, with regular communication to discuss appointments, check-ins and follow-ups on the quality of work completed. The staff who attended my home were polite and friendly and did a splendid job. I would highly recommend this company.
I was very pleased from the initial surveyor who checked what work was to be done. The guys who fitted the insulation were clean, tidy and on time.
Turned up on time. Completed the work quickly and with a minimum of fuss.
Your home, your numbers
Answer a few quick questions about your property and current insulation. We'll estimate your potential annual saving and which measures are likely to make the biggest difference — free, with no obligation. Your no-obligation home assessment gives you exact figures.
How It Works
We manage every stage so you're not left chasing tradespeople or paperwork.
A qualified assessor visits, surveys your loft, walls and floors, and completes a comprehensive survey.
You receive a clear plan of which measures will make the most difference to your home, and an upfront cost.
Our accredited installers carry out the work, usually within a day or two, with minimal disruption to your home.
Every job is checked against TrustMark standards and signed off, with paperwork for your records and any warranty.
Who we are
CT Eco Plus is an award-winning insulation and home-energy specialist based in Sussex, working with homeowners right across the UK. We manage every stage ourselves — from the first survey through installation to final sign-off — so you’ve got one accountable team and never have to chase separate trades. In 2025 we were named National Insulation & Fabric Project of the Year and earned our fifth consecutive regional Installer of the Year award. Every job is carried out to TrustMark, RECC and ISO-certified standards.
Recent Projects
A snapshot of the homes and buildings we’ve upgraded. Select any project to see what was involved.
Our national award-winning project brought a full fabric-first upgrade to a single home — loft insulation, internal wall insulation, controlled ventilation, and replacement energy-efficient windows and doors. Delivered in partnership with SWIP Ltd, it was named Insulation & Fabric Project of the Year at the 2025 Energy Efficiency Awards National Awards, recognising both the standard of workmanship and the comfort and efficiency gains for the household.
Read the full case study (PDF)A community-focused commercial retrofit delivered in partnership, bringing ventilation, underfloor insulation and internal wall insulation to Belchamp Community House. It’s a good example of how the right fabric measures and strong collaboration can cut a building’s energy demand while keeping a well-used community space warm and comfortable year-round.
Read the full case study (PDF)A whole-home package focused on the roof space: room-in-roof insulation and loft insulation to stop heat escaping upwards, paired with ventilation to manage moisture and keep the air fresh as the home is made more airtight.
Read the full case study (PDF)Cavity wall insulation is one of the most cost-effective ways to cut heating bills — insulating material fills the gap between the inner and outer walls to slow heat loss, usually with minimal disruption. Paired here with ventilation to keep the home breathing properly once it’s better sealed.
Read the full case study (PDF)Loft insulation is one of the simplest, highest-impact upgrades for most UK homes, since a large share of heat is lost through an under-insulated roof. Brought up to the recommended depth and paired with ventilation, it makes a real difference to both comfort and running costs.
Read the full case study (PDF)A comprehensive fabric upgrade combining internal wall insulation, room-in-roof insulation and loft insulation, with ventilation throughout. Tackling the walls and roof together delivers the biggest reduction in heat loss and the most consistent, comfortable temperatures across the whole home.
Read the full case study (PDF)Accredited & certified
Independently assessed and registered — so your insulation work is compliant, insurance-backed and signed off to recognised standards.
See Us In Action
Common Questions
Most loft insulation top-ups are completed in a few hours. Cavity wall insulation is typically done from the outside in half a day, with no need to move furniture or take time off work.
Properly installed insulation shouldn't cause damp. Where a home is being made significantly more airtight, we assess ventilation as part of the same visit, so moisture has somewhere to go rather than building up.
Usually yes. Heat loss through an under-insulated loft doesn't fall in a straight line as you add depth, but most UK homes built before the 1990s are well below the recommended 270mm and see a worthwhile saving from topping up.
Older spray foam can trap moisture against timber roof structures, which some mortgage lenders and surveyors flag during a sale or remortgage. We remove it safely and recommend a more breathable insulation system in its place.
Get In Touch
Tell us a little about your property and we'll call you back.
