“Found the company to be very efficient from the word go. The Rep after giving us a quote, told us he would not chase us up – he would wait for us to call him. Required no deposit. Works team arrived on time – worked hard. The days they were here included two of the hottest days of the year. They just kept working despite the extreme heat in the loft. After completion there were a couple areas that I felt needed improving on. Within 24 hours a senior employee arrived and completed the work to my satisfaction. Each day the left the house clean. All rubbish was cleared to our satisfaction.”
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Open-Cell vs Closed-Cell Spray Foam Removal: What's the Difference?
If you’ve been told your property has spray foam insulation, the type matters more than you’d think. Open-cell and closed-cell spray foam behave very differently once they’re in your roof, affecting everything from your mortgage risk to how straightforward removal will be.
Whichever type you have, our spray foam removal contractors are equipped to handle it safely, restoring your roof to a dry, breathable, mortgage-friendly condition with a completion certificate as standard.
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The Core Difference Between Open Cell and Closed Cell Spray Foam
You may be thinking, what actually makes these two types of foam different? Well, it comes down to texture, density, and how tightly the foam bonds to your roof.
Open-cell spray foam is soft, lightweight, and spongy to the touch, similar in feel to a stiff sponge. It’s more flexible, allows some air and moisture to pass through, and forms a lighter bond with the surfaces underneath.
Closed-cell spray foam is dense, hard, and rigid once cured. It bonds aggressively to rafters, tiles, membranes, and roof felt, forming a solid, airtight barrier rather than a soft layer sitting on top.
Why This Matters for Your Mortgage
This difference isn’t just technical. It’s often what decides how a lender views your property. Closed-cell tends to be the bigger red flag, since it seals the roof space completely and bonds so firmly to the timbers underneath that a surveyor often can’t properly inspect the structure for rot, damp, or existing damage. Open-cell’s lighter, more permeable structure is sometimes easier for a surveyor to assess around, though it can still raise the same concerns depending on how it’s been applied.
If you’re trying to work out how your lender might view your specific situation, our guide on which mortgage lenders accept or reject spray foam insulation goes into this in more detail.
Why This Matters for Spray Foam Removal
The same properties that affect your mortgage also determine how removal is carried out and how long it takes.
- Open-cell removal is generally quicker, since its softer structure can be broken apart and stripped out with less resistance, typically causing less disturbance to the surface underneath.
- Closed-cell removal takes considerably more time and care. Its rigidity and strong adhesion mean it has to be carefully worked away from rafters and roof felt without damaging the timber beneath, which is often the single biggest factor in how long a job takes.
This is also why we can’t give an accurate quote without seeing your loft first. Foam type, thickness, and how it was originally applied all affect the scope of the job, which is exactly what our free inspection is for.
Our Spray Foam Removal Process
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Frequently Asked Questions
Get answers to your most common questions about spray foam removal. Our experts provide valuable insights, tips, and advice to help you understand the process, benefits, and best practices for effective removal.How do I know which type of spray foam I have?
It’s not always obvious just by looking. Open-cell tends to be lighter and softer to the touch, while closed-cell is hard and rigid. If you’re unsure, our free inspection will confirm exactly what you’re dealing with.
Is closed-cell foam always more expensive to remove?
Generally, yes, since it takes longer and requires more careful work to avoid damaging the roof structure underneath. We’ll always confirm exact costs after seeing your specific property rather than giving a generic estimate.
Can open-cell foam still cause mortgage problems?
Yes, while closed-cell tends to be the bigger concern, any spray foam that restricts a surveyor’s ability to inspect the roof can raise questions, regardless of type.
Does it matter which type was originally recommended for my roof?
Not for removal purposes, whichever type is present, our process is built to handle it safely and restore your roof to an inspectable, mortgage-ready condition.
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Check out our client reviews and see why so many people love working with us! We’re proud to have built lasting relationships with happy clients who consistently praise our reliability, attention to detail, and outstanding service. Don’t just take our word for it – hear directly from those who’ve experienced the difference.
