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Underfloor Insulation

Reduce your home, business, or local authority public buildings’ heating bills and carbon footprint and improve their energy efficiency with underfloor insulation from Grant Store.

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  • We’re with you all the way, from installation to aftercare
  • Expert advisors and approved installers
  • Nationwide coverage with 50 years of experience

Your insulation underfloor solutions

It might shock you to know that your home can lose between 10 and 20% of its heat through the floor if you don’t have adequate insulation. By upgrading your existing underfloor insulation or installing it for the very first time, you could save up to £400 on your heating bills.

We use as many eco-friendly materials in our underfloor insulation projects as possible. Not only does this make your property warmer, but it also reduces your carbon footprint. Our team has over 50 years of experience in advising homeowners, business owners, and local councils on the best possible way to make buildings more energy efficient, so speak to them to get a highly competitive quote for floor insulation today.


How insulation under the floor is installed

Here’s how Grant Store’s underfloor insulation is installed:

  • We’ll remove your carpets and laminate flooring (and your floorboards, if necessary)
  • A vapour barrier made of plastic sheeting is installed to prevent moisture from condensing on the underside of the insulation
  • The insulation is then installed between the floor joists
  • A secondary vapour barrier is added
  • Your floorboards/carpet/laminate flooring are replaced again

Interested? Speak to the team today for a competitive quote!

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How much could you save?

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  • We’re with you all the way, from lead to aftercare
  • Expert advisors and approved installers
  • Nationwide coverage with 50 years of experience

Why add underfloor insulation to your home?

There are so many benefits to having insulation under the floor in your home. Here are five good reasons that will convince you that it’s a sound investment:

It reduces heat loss

Underfloor insulation can help reduce heat loss from your home by up to 20%, making it warmer and cheaper to heat.

Improved energy efficiency

It improves your home’s energy efficiency by making it more airtight. This can also save you money on your energy bills.

A more comfortable home

Floor insulation can help reduce drafts and cold spots and improve your sleep quality.

Adds value to your home

By making it more energy efficient and comfortable, underfloor insulation can help to improve your home’s resale value

Reduces condensation

Thanks to the vapour barriers, it can help reduce condensation and prevent mold growth by preventing moisture from rising up from the ground.

If you have any questions or would like to get a competitive quote, get in touch with our expert team today.

Fully Accredited Underfloor Insulation Installers

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Why get your underfloor insulation from us?

At Grant Store, we pride ourselves on being the only point of contact you’ll need throughout the whole process, from the initial quote all the way through to your aftercare. With over half a century of experience, fully qualified and regulated insulation installers, and a host of glowing Trustpilot reviews to back this up, you can count on us to get the job done right.

How it works

We’ve devised a simple 1, 2, 3 system to make the underfloor insulation installation process hassle-free.


Tell us about your property

This is just to establish a few basic facts, like its location, size, floor square footage, and heating requirements. It’s also to find out if you’re eligible for floor insulation grants under the Great British Insulation Scheme or the LA Flex Scheme.



We’ll use our 50+ years of expertise to conduct a survey of your home to find you the best possible solution for your insulation underfloor needs. If you do meet any required funding criteria, we’ll also help you apply for underfloor insulation grants.



Our professional installers are fully regulated and accredited, so you know you’ll be getting first-class service every step of the way on your new underfloor insulation journey.

If you have any questions about any of the above, then we’re only a phone call away.


You must have a few questions. We’ve answered some of the most commonly-asked questions about loft insulation here, but please speak to the team if you have any more.

What type of insulation is best for underfloor?

The best type of underfloor insulation for your property will depend on your specific needs and budget. There are a few different types of insulation, including:

  • EPS is a rigid foam insulation that is made from small beads of polystyrene that are expanded with gas
  • XPS is similar to EPS, but it is made with a different manufacturing process that makes it more durable and resistant to moisture
  • Polyurethane foam is a flexible foam insulation that is made from a chemical reaction between isocyanates and polyols
  • Cellulose insulation is made from recycled paper that has been treated with fire-retardant chemicals

However, we’ll carry out a thorough survey of your property before recommending which type of insulation we think is the best.

Is it worth insulating under the floor?

Yes. The average home loses about 20% of its heat through the floor, which equates to paying an extra £300 to £400 per year in energy bills. Not only that, but a well-insulated floor can make it less draughty, better soundproofed, and more eco-friendly as it won’t lose as much heat.

It also works extremely well when combined with other types of new heating technology to make your home even more eco-friendly. If you’re interested in upgrading your boiler, central heating system, heat pumps, or even a solar energy system, then speak to our expert team for advice.

What is the best way to insulate a wooden floor underneath?

There are a few different ways to put insulation under your floor, and our fully qualified and regulated installers will do their thorough due diligence before deciding which method will work most effectively for your home. Speak to the team for a FREE quote today.

Does underfloor insulation cause damp?

Underfloor insulation doesn’t cause damp on its own. However, if it’s not installed properly, it can trap moisture and lead to damp problems. This is because underfloor insulation can create a barrier that prevents moisture from escaping from the ground. Fortunately, we always install a vapour barrier between the layers of insulation to prevent this from happening.