Loft Insulation Boards

(4 products)

Loft Insulation Boards

Loft insulation boards are one of the most effective ways to reduce heat loss in both domestic and commercial buildings. Up to 25% of a building's heat can escape through an uninsulated roof, making the loft one of the highest-priority areas to address. Rigid insulation boards offer a slim, high-performance alternative to loose mineral wool, particularly suited to loft conversions and rooms-in-roof where space is limited.

When to Use Rigid Loft Insulation Boards

Rigid boards are the preferred choice when:

  • Converting a loft into a habitable room and insulating between or below rafters
  • Topping up existing insulation where additional thickness is impractical
  • Insulating a flat or low-pitch roof where roll insulation won't fit
  • A precise U-value target needs to be hit with minimal build-up

PIR Boards for Loft Insulation

Our loft insulation boards are primarily PIR (Polyisocyanurate), offering the best thermal performance per millimetre of thickness. This makes them ideal for between-rafter and below-rafter applications in loft conversions, where every millimetre of headroom counts. Available in a range of thicknesses from 25mm to 150mm.

Next-Day UK Delivery

All loft insulation boards are available for next-day delivery across mainland UK on qualifying orders. Browse the full range below and filter by thickness or brand to find the right board for your project.

High Performance Insulated Loft Boards

With our range of high-performance loft insulation boards, you can combine storage and insulation into one product. The boards are designed to save space, cut down on your energy costs, and their composite of PIR insulation with tough OSB board provides safe and solid access to insulated roof spaces.

Loft boards maintain very high insulation values and comply with health and safety guidelines and building regulations, so they will provide your home with safety and warmth.

Long-Term Loft Insulation

Loft insulation boards are designed to be long-lasting, and provide your home with an eco-friendly solution for many years, so you can be confident that you are investing in a loft insulation style that is worth it.

Our range is designed to eliminate cold spots and fit a wide variety of spaces, including floors, walls, and even the roof. They are also lightweight and compact, allowing them easy handling in tight spaces.

Frequently Asked Questions

Are insulation boards better than insulation rolls?

Insulation boards offer a number of advantages over insulation rolls. These include:

  • Easier to install
  • Save space
  • Half the thickness of insulation rolls

The insulation boards that we sell at Construction Megastore are perfect for loft insulation and more.

Can you put too much insulation in a loft?

Insulating your loft correctly is important; too little and it doesn’t work, too much and it causes condensation and damp. That is why striking the right balance is key. Our loft insulation boards provide you with the perfect amount to insulate your loft.

Do you need a gap between insulation and loft boards?

It is important to leave a small air gap between loft boards and other mineral wool insulation in order to stop damp forming.

What customers say about us

We do our best to provide you the best experience ever

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Exceptional service, great product choice

Nov 15, 2023

Exceptional service. I needed insulation, this company had the brand I wanted, were able to deal with a query I had via chat and even though it was quite late in the...

A C-Ward

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I ordered SuperFoil insulation on 15th…

Nov 16, 2023

I ordered SuperFoil insulation on 15th… I ordered SuperFoil insulation on 15th November and it was delivered on 16th November. The prices are...

James

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Construction Megastore were really...

Nov 15, 2023

Construction Megastore were really helpful and friendly when I was ordering some SuperQuilt and they offer very competitive prices. Highly recommend them!

jenifercorkerhotmail.com

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