What Property Owners in London Need to Know about Spray Foam Insulation

+44(0) 20 7820 4774

Insulating your home is generally a good way to cut back on energy bills and add value to your property.

But there’s one type of insulation that could cause structural problems and prove costly in time and money: spray polyurethane foam (SPF).

In this article, we explain why many professionals in the property industry are urging homeowners to be wary of installing SPF and what to do if it’s already in your home.

But firstly, what is SPF?

More commonly known as spray foam, SPF has been used for decades in the UK. It’s sprayed in liquid form into roofs and other hard-to-reach places, where it expands, sets and then acts as an insulator.

Why does it cause problems?

Some types of spray foam block airflow and cause condensation. Over time, this can lead to wooden beams and rafters rotting.

And because spray foam sets hard across the inside of the roof, it’s impossible to inspect what’s going on underneath. So, if there is a problem with damp or warping, you can’t spot it early and take action. For this reason, many surveyors refuse to sign off on properties with spray foam; they simply can’t see enough to make a professional assessment.

What are the implications?

As many banks won’t lend on homes with spray foam, its presence can impact the saleability of a property. Similarly, a homeowner could be ineligible for equity release if spray foam is present in their home.

What to do if spray foam is in your property

Firstly, don’t panic or make any rash decisions. Seek advice from a chartered surveyor about next steps.

One option is to have the spray foam removed. (It’s a specialist job, and not one to do yourself, as the spray foam can be toxic to touch or inhale.)

The cost of removal will depend on the size of your roof space and the availability of specialists to carry out the work. But expect the bill to run into the thousands. (Last year, Checkatrade suggested removing spray foam from the roof of a three-bed home would cost around £3,200.)

If you’re considering having spray foam removed, do your homework and check the credentials of the tradesperson quoting for the work. Unfortunately, there are cowboys out there. If someone asks for a large sum upfront to do the job or pressures you to commit to work on the spot, be suspicious and send them packing.

This post was written by:

Steven Herd

Steven's extensive 30 years of estate agency experience in London culminated in launching MyLondonHome, which has enabled him to bring together a hand-picked team to provide the high level of quality advice, market strength and service he is renowned for.

Share this post

Join The Discussion

Similar Posts

Conservatives Promise No Capital Gains Tax for Landlords Selling to Tenants

Shock policy proposals yesterday by the Conservative Party, as reported by the BBC and Letting Agent Today, introduce significant incentives for landlords. The key proposal is the scrapping of Capital Gains Tax (CGT) for landlords who sell properties to their tenants. This move could have a big impact for landlords,

Seven Must-Ask Questions for Your Estate Agent

Choosing the right estate agent is a big step on the road to successfully selling your home. But with so many agents making big promises to win your business, how can you identify the genuine professionals from the wheeler dealers? Meeting different agents at the start of the process can leave

Rental Red Flags: Warning Signs London Landlords Should Look Out For

If you’re a landlord, you can probably think of nothing worse than your rental sitting empty. The prospect of covering the mortgage and utility bills in between tenancies may keep you awake at night. And there are security implications too: a lengthy void period may invalidate your landlord insurance and

Subscribe to our YouTube channel to get a notification every time we post a video.

Compare listings