Landlords: spray foam, EPCs and remortgaging a portfolio
Our contractors: 15,123 verified reviews across 8 platforms, rated 4.9 on GoogleSpray foam creates the same valuation problem for a buy-to-let mortgage as it does for a residential one, and it can complicate an EPC assessment and tenant conversations too. If more than one of your properties is affected, the maths changes, because you are paying per roof, not once.
The short version
A buy-to-let remortgage valuation follows the same survey logic as a residential one: a surveyor who cannot see the timbers cannot confirm the roof's condition, and BBC News found in November 2024 that around a quarter of the UK's largest mortgage providers would not lend on a foamed roof. Where you hold several affected properties, work out the removal cost and the refinancing benefit per property, then decide whether to tackle them together or one at a time.
Buy-to-let lending follows the same logic
A buy-to-let mortgage still requires a valuation, and that valuation still relies on a surveyor being able to inspect the property properly. Spray foam sprayed over the roof timbers creates the identical problem it creates for a residential mortgage: the surveyor cannot see what they need to see. Whether a specific lender in the buy-to-let market takes the same position as the residential lenders BBC News surveyed in November 2024 is a question for that lender directly, since buy-to-let and residential lending criteria are set separately even within the same banking group.
If you are remortgaging a single property, this is the same decision any homeowner faces. If you are remortgaging a portfolio, or several properties come up for renewal around the same time, it is worth checking every affected property's status before any of the individual deals are due, rather than discovering the problem one property at a time under deadline pressure.
The EPC is a different question to the mortgage
Spray foam is insulation, and it usually helps a property's Energy Performance Certificate rating, because the EPC assessment is measuring thermal performance, not surveying the roof structure for a lender. A good EPC score and a declined mortgage valuation are not contradictory. They are two different assessments asking two different questions, and passing one does not resolve the other.
Where it can complicate things is future work needed to maintain or improve the EPC rating, such as loft access for other upgrades, where a foamed roof can be harder to work around than an unfoamed one.
Practical questions
Tenants and disclosure
| Situation | What is sensible |
|---|---|
| A current tenant, no work planned yet | No action needed. This is not typically something that affects day to day tenancy. |
| Removal work is about to be scheduled | Tell the tenant what is happening and roughly how long the loft or property will have contractors in it, so there are no surprises. |
| A new tenant moving into a property with known spray foam | Not usually a material fact for the tenancy itself, but being upfront if asked avoids a poor first impression, particularly if work is planned. |
| A tenant asks directly about insulation or roof condition | Answer honestly. Vague or evasive answers tend to create more concern than the fact itself. |
This is practical guidance, not legal advice. Speak to your letting agent or a solicitor about any specific disclosure obligation that applies to your tenancy agreement.
Scheduling around a tenancy
Removal takes two to five days on most homes, and the work is loft based rather than throughout the whole property, so most tenants can continue living there normally while it happens. Give proper notice under your tenancy agreement, agree access with the tenant directly rather than assuming it, and let them know there will be some noise and dust sheeting while contractors are on site.
Where a property is between tenancies, that gap is often the easiest window to schedule the work, since it removes the access question entirely.
No obligation, no deposit
Have someone look at it properly
An hour in the loft and you will know exactly where you stand, in writing, with photographs. If the foam is sound, that is what the report says and there is nothing to pay.
Book the free inspection
Two steps. No deposit, and nothing to pay if the foam is sound.
Working out the portfolio maths
With one affected property, the decision is straightforward: weigh the removal cost against what staying locked out of your current lender, or a wider pool of lenders, is costing you in rate or in restricted options. With several affected properties, ask yourself three questions before committing to anything.
- Which properties are actually coming up for refinancing soonest? There is rarely a case for doing all of them at once if only one or two deals are due in the near term.
- Does removing on one property meaningfully change your access to lenders, or only that one deal? Some portfolio lenders assess the whole portfolio together, in which case one unresolved property can affect more than its own remortgage.
- Is the removal cost on a given property smaller than the rate difference you would be accepting by staying with a narrower pool of lenders over the life of the next deal? This is the calculation that usually decides it.
An inspection on each affected property, free either way, gives you the real condition and a firm removal price to run that maths against, rather than an estimate.
Common questions
Do specialist buy-to-let lenders take a different view to residential lenders?
Some do, and criteria vary between lenders and between buy-to-let and residential products even within the same banking group. There is no single confirmed portfolio-wide position, which is why checking with your specific lender or broker for each property matters more than a general rule.
Will spray foam removal improve my EPC rating?
Removing insulation without replacing it would likely reduce your EPC score, not improve it. Our process re-insulates the loft to current Building Regulations as part of the same job, which keeps the thermal performance intact once the foam itself is gone.
If I have several affected properties, should I get them all inspected at once?
It is a reasonable approach if your time allows it, since it gives you the full picture to plan against rather than dealing with each one reactively as a remortgage deadline arrives.
Does this affect landlord insurance?
That depends on your specific policy and insurer, and is worth a direct conversation with them rather than an assumption either way.
Is removal cost different for a rented property compared with an owner occupied one?
No. The cost is set by the foam type and the treated roof area, not by who lives there. The same rates apply, on the cost page.
Read next
Where the lenders stand
The residential lending picture that buy-to-let criteria are often set alongside.
Read thisWhat removal costs
The figures to run your portfolio maths against, by property type and foam type.
Read thisSelling instead of remortgaging
If refinancing stays closed on a property, here is how selling it compares.
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