Suspended Timber Floor Insulation
Underfloor Insulation helps UK homeowners improve comfort, reduce draughts, and prevent heat loss through suspended timber floors. LAMTANS Engineering delivers professional retrofit insulation solutions from our Manchester base, helping properties across the UK achieve better thermal performance and energy efficiency.
Floor Check
If your home was built before 1960, you likely have suspended timber floors — floorboards laid on top of joists with a void underneath.
Cold air rises through gaps in the floorboards. You feel draughts, rooms take longer to warm up, and heat escapes through the floor.
Draughts stop. Your home stays warmer and more comfortable, and less heat is lost through the floor — helping to reduce your energy costs.
The Benefits
Underfloor insulation provides an effective way to improve the comfort and energy efficiency of homes with suspended timber floors by reducing draughts, preventing heat loss, and creating a warmer indoor environment throughout the year.
Prevents cold air entering through gaps in floorboards, making rooms feel warmer and more comfortable.
Reduces heat loss through floors, with a typical estimated annual saving of around £100–£200 on energy costs.
Takes the chill out of cold floors and improves underfoot comfort, especially during the colder months.
Warmer floor surfaces help minimise moisture build-up and condensation risks in your rooms.
The typical investment can be recovered within around 3–5 years through estimated energy savings, depending on your home and usage.
Eligible homeowners may receive partial funding towards underfloor insulation through schemes such as ECO4 — a top-up contribution may be required.
Savings and payback figures are typical estimates only and depend on your property, floor area, usage patterns and energy prices.
Check Your ECO4 Grant Eligibility →Indicative Guide Prices
Underfloor insulation costs vary depending on the size of the area, floor access and installation requirements. The table below shows indicative guide prices for different room sizes, together with how ECO4 support may affect your cost if you are eligible.
| Room Size | Indicative Cost | With ECO4 Support (If Eligible) |
|---|---|---|
| 15m² (small room) | £500 – £800 | May be fully or partially funded |
| 25m² (medium room) | £800 – £1,200 | May be fully or partially funded |
| 40m² (large room) | £1,200 – £1,800 | May be fully or partially funded |
| Whole ground floor | £2,000 – £3,000 | May be fully or partially funded |
All costs shown are indicative guide prices, not fixed quotes. ECO4 funding is partial in many cases and depends on eligibility — a top-up contribution may be required. Your free survey confirms an accurate written quote and what funding may apply to you.
Check Your ECO4 Grant Eligibility →Step by Step
The underfloor insulation installation process involves a careful step-by-step approach, from inspecting the existing floor void and preparing floorboards to fitting insulation, managing moisture, and completing the final finish for long-lasting thermal performance — all delivered to PAS2035 retrofit standards.
We check the void depth, floor condition and ventilation to confirm your home is suitable.
Boards are lifted and numbered so every one goes back exactly where it came from.
We check for damp, pests and services (pipes and cables) before any insulation is fitted.
Mineral wool, PIR boards or sheep's wool fitted snugly between the joists, matched to your floor and budget.
A breathable membrane supports the insulation and holds it securely in place between the joists.
A vapour control layer prevents moisture rising into the floor structure. Getting moisture management right at this stage protects your joists and insulation for the long term — it's the step that determines the lasting success of the whole installation.
Boards are refitted in their original positions, then sanded and finished if required.
Suitability Check
Before installing underfloor insulation, we check your floor type, access, ventilation and existing condition to confirm whether insulation is suitable for your property.
Our honest promise: we assess your property during a free survey and recommend the most suitable insulation solution for your home — if underfloor insulation isn't right for it, we'll tell you and point you to what is.
Trusted Installer
We provide professional underfloor insulation services designed for UK homes, combining retrofit expertise, quality materials and compliant installation methods to reduce heat loss, improve comfort and deliver long-term energy efficiency.
Insulation installed following recognised retrofit standards for quality, safety and energy efficiency.
Government-endorsed quality assurance for reliable workmanship and customer confidence.
We understand the challenges of older UK housing stock, including suspended timber floors and draught issues.
An honest assessment of your floor construction, insulation requirements and suitability.
We help identify whether you may qualify for partial ECO4 funding support towards your insulation.
Based in Manchester and serving Stockport, Oldham, Droylsden, Ashton-under-Lyne, Tameside and Greater Manchester, with nationwide UK coverage.
Common Questions
As an indicative guide: a small room is around £500–£800, a medium room £800–£1,200, and a whole ground floor £2,000–£3,000. These are indicative estimates only — actual costs depend on floor area, access and condition, and your free survey confirms an accurate written quote.
Partial funding may be available through schemes such as ECO4 or the Warm Homes Plan if you are eligible. Funding is not guaranteed, and in some cases you may need to pay a top-up contribution. Contact us for a free, no-obligation eligibility check.
Yes. Floor draughts come from cold air rising through gaps in the floorboards, and underfloor insulation is designed to stop this — making rooms feel noticeably warmer and more comfortable.
No. The work is done room by room, we can work around your furniture, and you can stay in your home throughout. Installation typically takes 1–2 days per room.
Correctly installed underfloor insulation is designed to last 40+ years with minimal maintenance. Our PAS2035-compliant installation — including proper ventilation and moisture management — is what protects that lifespan.
Yes. We are TrustMark Registered, RECC Accredited and PAS2035 Compliant, and we deliver ECO4 eligible projects. You can view our credentials on our accreditations page.
Free Survey & Quote
Get your free, no-obligation underfloor insulation quote today — contact LAMTANS Engineering to book your free survey. Not sure if you have suspended timber floors? Book a free consultation and we'll confirm what you have and advise you within 72 hours following your free survey.
Free survey · No obligation · Advice within 72 hours following your free survey