Live · the OMEGA retrofit
Watch your home, fully retrofitted with spray foam
One cinematic minute. Same house — your house — at every stage of the OMEGA retrofit. Click any chapter to jump. Tap the speaker to hear it.
Home energy upgrades
Spray foam in your loft? Here's what to do about it
Around a quarter of UK mortgage lenders refuse to lend on properties with spray foam in the roof, and RICS guidance instructs surveyors to flag it as a material concern. If a lender or surveyor has flagged yours, we remove it safely and re-insulate the loft with multifoil instead. We only install open-cell where the survey confirms the roof can take it — and almost always recommend multifoil first.
Surveyed first
designed from heat-loss numbers, not a postcode estimate
Within the week
survey usually booked in 2–3 days, plan in writing 48 hours later
Your surveyor
MCS-certified, employed by OMEGA — not subcontracted
The plan is yours to keep. Take it to two other installers if you like.
Installed by OMEGA's own teams across the United Kingdom.
Live · 2026 install figures
The numbers, at a glance.
Typical figures for a 3-bed UK home. Your real numbers come in writing within 48 hours of a free home survey.
Install time (typical)
1day
Typical U-value achieved
0.18
–0.22 W/m²K
Product type
BBA-certified open-cell only
Guarantee
25
-year product, 5-year workmanship
Accreditation
PAS2030 · TrustMark · BBA
About this service
Spray foam, designed properly.
If you're considering spray foam for a stubborn loft conversion, or you've inherited a home where someone else fitted it and now your mortgage application is stuck, you've landed in the most divisive corner of UK insulation. You need a surveyor who'll be straight with you, not pitch you a product. Done correctly on the right property, open-cell foam on the underside of the rafters delivers a U-value of 0.18 W/m²K with minimal depth. Sometimes the only practical option for a room-in-roof conversion. Done badly, or closed-cell specified without a breather membrane, it traps moisture in timbers and from 2023 onward makes the home difficult to remortgage. We survey every roof against the 2023 RICS guidance, the BS 5250 moisture model, and your lender's specific stance — install open-cell only, BBA-certified, with a written justification on the quote. We also remove existing foam where a survey or mortgage application has flagged it: extraction, substrate inspection, rafter repair, and ceiling-line re-insulation, all in one job.
What independent experts say
Policy Briefing · OMG-033
House of Commons Library briefing
As many as 250,000 homes in the UK are estimated to have this type of insulation.
What you get
- Open-cell BBA-certified systems only — vapour-permeable, not moisture-trapping
- Written fabric survey with a RICS 2023-aligned suitability ruling before you commit
- Mortgage-lender aware: we check your lender's stated position before quoting
- Fully PAS2030-accredited install team; 25-year product guarantee
- Extraction and remediation service — including lender sign-off letter — where removal is the right call
See the numbers
Spray foam — costs and savings, fitted for your home
Live tool, Q2 2026 prices. Slide through property size for an honest instant estimate — your real quote will come in writing within 48 hours of a free survey.
How it works
How it works, step by step.
01
Fabric survey + lender check
Our RICS-aligned surveyor assesses the roof structure, ventilation, existing insulation and — critically — cross-references your mortgage lender's published stance on spray foam. Written report follows within 72 hours.
02
Honest recommendation
Three possible rulings: (a) install open-cell; (b) extraction required; (c) alternative method recommended. We put the reasoning on the quote so it is clear to surveyors and lenders.
03
Install or remove
Install: single-day application with controlled curing and full ventilation balance. Removal: mechanical extraction, substrate scrape, rafter inspection, and clean finish to the rafter line.
04
Certification + lender letter
TrustMark-lodged certificate on install, 25-year BBA product guarantee, 5-year workmanship. Removal jobs get a signed lender letter confirming the extraction and the specification of the replacement insulation.
Accreditations that matter
Not logos. The certifications that matter for Spray foam.
Every one of these is checkable online. Every one changes something concrete about the job — the survey, the materials, the guarantees, the way the grants land.
PAS 2030
Install quality standard for retrofit measures
Our teams are certified to the installation standard that grant-funded work is audited against.
PAS 2035
Whole-house retrofit co-ordination standard
We sequence fabric-first so measures don't undermine each other — the same discipline ECO4 requires.
TrustMark
The only endorsement scheme backed by the UK consumer body
Every install is lodged on the TrustMark register so your cover travels with the property.
BBA certified
British Board of Agrément product certification
Every insulation layer we install is named on the quote and BBA-certified — no unlisted substitutes.
Your numbers
Real numbers. Your postcode. Your home.
Type your postcode below. We pull the latest EPC for your home, blend in this month's Ofgem tariffs, and show you what you're paying this year — and what you could pay after the three upgrades most likely to make sense for a house like yours. No email. No follow-up. Just your numbers.
Model: NEED 2024 demand medians · Ofgem default tariff cap Apr 2026 (gas 5.9p · elec 27.7p · dual-fuel standing ~£328) · OMEGA install ledger 2026 retrofit-depth medians · ECO4/HUG2/BUS grant tables
Want a 2-minute answer first?
Not ready to book a full survey?
Tell us a bit about your place and we’ll come back with specific numbers for your home — no slot to pick, no pressure.
Prefer to talk now? Call free on 0800 229 4094.
Proof in the data
Spray foam — how the numbers stack up
Cumulative £ saved vs install cost for your property type. Drag the chart to scrub through the years.
Ready to see what spray foam would cost on your home?
Free 45-minute home energy survey — thermal imaging, grant check, written plan within 48 hours.
The plan is yours to keep. Take it to two other installers if you like.
Grants and funding
The grants you can get.
Eligibility changes often, the schemes don’t reward homeowners who fill the forms in themselves, and the paperwork is genuinely tedious. So we file it for you.
We handle the paperwork end-to-end
- ECO4 + GBIS — insulation, paid direct to us
- BUS — up to £7,500 off heat pumps
- SEG — export tariff registration
- OZEV / EVHS — EV charger grants
You sign once. We submit, evidence, and chase. The grant comes off your final invoice — nothing for you to claim back.
ECO4 funding — where the PAS2035 assessor approves the measure
Home Upgrade Grant 2 — off-gas-grid properties only
Common questions
Common questions, answered honestly.
Will spray foam stop me re-mortgaging?
It depends on your lender and the survey. Since 2023 the major UK lenders have moved to case-by-case assessment rather than blanket refusals. The key factors are whether it is open or closed cell, whether the roof is still ventilated, and whether a RICS surveyor can inspect the timbers. We check your lender's current stance before quoting and either install to the standard they accept or recommend removal.
What is the difference between open-cell and closed-cell?
Open-cell foam is vapour-permeable — moisture can still pass through it, so the rafters stay in equilibrium with the air. Closed-cell is rigid and vapour-tight, which is fine in a correctly designed warm-roof build-up but has historically caused timber-rot problems when applied directly to tiling battens without a membrane. We install open-cell only.
How do you remove old spray foam?
Mechanical extraction tools strip the foam back to clean rafters; stubborn residue is hand-scraped. Every rafter is inspected for rot, breather membrane condition is checked, and any damaged timber is replaced before we re-insulate at the ceiling line with 300mm of BBA-certified mineral wool. The full job typically takes 2–3 days on a 3-bed semi.
Do you do closed-cell foam?
No. Our policy is open-cell only, applied to vapour-permeable build-ups that meet BS 5250. If a third party has recommended closed-cell, we will happily talk through the moisture-model concerns before you decide.
Is spray foam eligible for grants?
Sometimes. ECO4 and HUG2 allow spray foam as a named measure but only where the PAS2035 retrofit assessor signs off that it is the correct intervention for the building. We handle that coordination for every grant-funded quote.
Where we install
Spray foam across the United Kingdom.
We install spray foam with our own crews across the United Kingdom. Each local team knows the housing stock, the grant routes, and the council-specific flex schemes that apply in their patch.
Often paired with…
Ready to start?
Free 45-minute home energy survey. Written plan within 48 hours. Zero pressure.
The plan is yours to keep. Take it to two other installers if you like.
25-year product warranty. 5-year workmanship guarantee. Both insurer-backed. If we vanished tomorrow, your cover still pays out.