Spray foam in a rented property

Three parties have a stake: the lender, the insurer and the tenant. The RICS consumer guide advises owners to put the question to the mortgage company and to the insurer: does each of them accept foam in the roof? A landlord should ask the same questions, and a buy-to-let lender may take its own view, so ask for it in writing.

Lender positions were reported as split in November 2024, with some named lenders refusing foamed homes and others weighing each case. That matters when you remortgage or sell with a tenant in place. Take advice from your solicitor or mortgage adviser on legal duties as a landlord; this page covers the roofing side only.

Tenants rarely know foam is there. What they notice are its effects: a stale chemical smell, damp patches on a ceiling, condensation on windows or a bedroom that stays cold. Reports like these deserve a prompt response, because they can point to trapped moisture. Our page on why spray foam smells explains what an odour can mean.

The Energy Saving Trust links wet or condensing roofs with timber rot. A landlord who investigates early protects the building and the occupant, and leaves a record that the problem was handled. Keep any message from the tenant, and note the date you replied.

Foam does not have to come out in every case, and our page on whether spray foam has to be removed explains the factors. In a rental, the deciding points are usually the lender's position, the insurer's response and what the timbers show on inspection.

An assessment gives you evidence either way. We photograph the roof and the rafters, which are the sloping timbers under the covering, wherever they can be reached, and put a quote in writing to you once the survey is done. If the foam can stay, you hold a record. If it needs to go, you have the scope of the work. RICS warns that removal could damage the structure if done carelessly, so the method matters.

Work in an occupied home needs notice and access arrangements. Agree dates with the tenant in writing, explain that there will be noise and dust, and make clear which rooms are affected. The loft hatch must be reachable, belongings need moving from the landing, and any room under the work should be covered. Pets, children and anyone with breathing difficulties need thinking about before dates are set.

Timing matters for warmth too. Once the foam is out the roof has no insulation until the replacement goes in, so plan the reinsulation to follow at once. The page on removing spray foam in winter explains how the sequence works in cold weather, and reinsulating the loft after spray foam removal describes the replacement options.

When a tenant reports a smell or a damp ceiling, the first reply sets the tone. Acknowledge the message in writing, say when someone will look, and ask for photographs and a note of when the problem is worst. Rain, cold mornings and showers are common triggers, and knowing which one helps an assessor narrow the search.

Do not assume the tenant is exaggerating, and do not assume the foam is the cause. Condensation from drying washing can mimic a roof fault, and a roof fault can look like condensation. A survey sorts the two. Offering a date for the inspection quickly, then keeping to it, does more to protect your relationship with the tenant than any reassurance.

A buyer of a rented house will ask the same questions as any other buyer, and their lender will too. Our page on buying a house with spray foam shows what they see from the other side, which is useful to know before you list.

If the roof has been assessed and the timbers are dry, a copy of the report can calm a sale. If the foam has been removed and the roof reinsulated, the file of photographs and invoices does the same. Either way, the work done now with a tenant in place is cheaper than a price cut agreed under pressure later.

MyBuilder's guide, updated on 21 August 2026, puts foam removal at £20 to £50 per square metre, averaging around £1,500, with an assessment at £100 to £200. These are national averages and not a price for your property. Only the written quote following a survey tells you what yours will cost, and it is worth checking that any quote shows VAT and scaffolding clearly.

Keep the survey photographs, the quote, the invoice and any lender or insurer letters in one folder, so a future buyer or letting agent can see the history. A landlord with several properties may want a standard folder for each, with the same headings every time.

We understand that a void period costs money and a tenant's patience is finite, so we agree the order of work with you before it starts. Once the survey is finished, pictures of the roof and a quotation on paper follow. Should you go ahead, the workmanship carries a ten-year written guarantee and the rubbish leaves with us.

Begin on the spray foam insulation removal page.