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Spray Foam Insulation

Can you use Expanding Foam in Cavity Walls?

expanding foam

Spray foam insulation is still a very new technology, and there’s limited installers and technicians available in the UK to advise on it.If you’re looking for answers to questions such as “How long does spray foam insulation last?”, “Can you use expanding foam in cavity walls?” and “Who installs spray foam insulation?”, look no further! We explain all right here, right now…

What is Spray Foam?

Spray foam insulation is an industrial foam that’s blown with water, and then sprayed directly onto surfaces, or injected into cavities.

The foam expands to fill the space around it, before drying out completely. Icynene’s insulation properties are so vast because it is an impenetrable material to air and moisture, and its expansion allows it to fill and seal off any size or shape of area.

Blocking air flow allows for a comfortable temperature to be maintained within the property, and no danger of damp or mould growth.

Where Does Spray Foam Insulation Go?

This multi-purpose product can be sprayed directly onto surfaces, or injected into spaces.

In the case of cavity walls, it can be injected into the cavity from one or more access points..

How Long Does Spray Expanding foam Insulation Last?

When installed by a specialist technician, spray foam insulation comes with a twenty-five-year guarantee. After this time period, ‘top-up’ sprays or injections can be made.

However, spray foam will not degrade or sag over time, and so it is a long-lasting solution that will not need replacing.

Who Installs Spray Foam Insulation?

Spray foam insulation can only be installed by a certified technician. In the UK, the only company with the relevant British Board of Agrement (BBA) accreditation is Home Logic.

Our teams of specialist technicians can give advice tailored to your property, and will even complete a free home survey to identify how best to keep your home warm.

Is Spray Foam Insulation Sound-Proof?

Whilst not sold as a sound-roofing product as such, independent lab tests have shown spray foam to effectively block up to 40% of loud noise passing through.

For properties on busy roads or under flight paths, it will be a welcome addition to help quieten things down, and keep peace of mind intact.


Tens of thousands of homes in the UK are now insulated with spray foam insulation, but elsewhere in the world, it’s the market leader and the default insulation option

Is Spray Foam Toxic?

No. Spray Foam does not contain formaldehyde, or any harmful chemicals. Even as the insulation ages, it will not ‘off-gas’ and nothing harmful will be emitted.

The seal that spray foam creates is impenetrable to airborne pollutants, so no allergens or toxins will be able to pass through it from the outside in, either. This can actually enhance the air quality within the insulated propertyand make it easier and cleaner to breathe.

How Can I Save Money With Spray Foam?

Increasing the heat-saving capacity of your property by decreasing the air flow lessens the need for heating and cooling.

Existing customers report savings on their energy bills of between 40%-50%, compared to the price they were paying having traditional fibreglass insulation panels.

The average UK home will therefore make back its financial investment in the installation within three years, based on energy bill savings alone.

Is It Popular?

Tens of thousands of homes in the UK are now insulated with spray foam insulation, but elsewhere in the world, it’s the market leader and the default insulation option.

You can read up on reviews of the product from existing customers on third party review website TrustPilot, where spray foam insulation currently has a 9.5 rating out of 10.

Where Can I Find Out More?

Simply call 0800 1700 636, or click the button below to contact our spray foam experts for a free discussion, quotation and home survey today!