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Internal Wall Insulation

Internal Wall Insulation

(30 products)

Internal wall insulation is designed to reduce heat loss, lower energy bills, and improve indoor comfort. Ideal for solid wall properties and renovations, these solutions help maintain a stable indoor temperature while preventing cold spots and damp issues.

Browse our collection, including insulation from leading brands such as Knauf, Isover, Rockwool, and Kingspan, offering a variety of solutions, including PIR and APR insulation boards, as well as insulation slabs and rolls.

Whether you need moisture-resistant, breathable, or eco-friendly options, we have products suited for both DIY projects and professional installations.

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Celotex
Celotex PIR Insulation Board - 2400mm x 1200mm - All Thicknesses

(102)

From £10.50 GBP ~~£12.64~~
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Most popular
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Rockwool
Rockwool RWA45 Slab - 1200mm x 600mm - All Thicknesses

(26)

From £21.30 GBP ~~£22.38~~
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Recticel
Recticel General Purpose PIR Insulation Board - 2400mm x 1200mm - All Thicknesses

(18)

From £10.35 GBP ~~£12.04~~
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Rockwool
Rockwool Flexi Slab - All Thicknesses

(1)

From £38.56 GBP
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Knauf
Knauf Dritherm Cavity Slab 37 - 1200mm x 455mm - All Thicknesses

(1)

From £17.29 GBP
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Ecotherm
Ecotherm Eco-Versal PIR Insulation Board - 2400mm x 1200mm - All Thicknesses

From £12.85 GBP
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Knauf
Knauf Acoustic Partition Roll (APR) - 600mm Width - All Thicknesses

From £43.17 GBP
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Knauf
Knauf Dritherm® Cavity Slab 32 - 1200mm x 455mm - All Thicknesses

(1)

From £27.20 GBP
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Isover
Isover Acoustic Partition Roll - All Thicknesses

From £40.50 GBP
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Knauf
Knauf Rocksilk RS45 - 1200mm x 600mm - All Thicknesses

From £28.40 GBP
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Kingspan
Kingspan Kooltherm K112 Framing Board - 2400mm x 1200mm - All Thicknesses

From £297.00 GBP
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Knauf
Knauf Rocksilk RS60 - 1200mm x 600mm - All Thicknesses

From £363.85 GBP
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Isover
Isover Cavity Wall Slab 36 - 1200mm x 455mm - All Thicknesses

(1)

From £28.60 GBP
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Unilin
Unilin (Xtratherm) XT/PR (PIR Insulation Board) - 2400mm x 1200mm - All Thicknesses

(1)

From £14.02 GBP
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Rockwool
Rockwool RW3 Slab - All Thicknesses

From £395.30 GBP
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Isover
Isover Cavity Wall Slab 32 - 1200mm x 455mm - All Thicknesses

From £37.48 GBP
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Kingspan
Kingspan Thermawall TW50 - 1200mm x 450mm - All Thicknesses

From £48.07 GBP
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Kingspan
Kingspan Thermawall TW55 - 2400mm x 1200mm - All Thicknesses

From £106.31 GBP

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Afsheen Far

Knauf Loft Roll 44 is a brilliant choice

Knauf Loft Roll 44 is a brilliant choice for anyone looking to improve their home’s insulation quickly and cost-effectively. The rolls are lightweight, easy to handle, and cut far cleaner than many other brands I’ve used. Once installed, the acoustic and thermal difference is noticeable almost immediately — rooms feel warmer, and draughts are reduced.

The product fluffs up nicely after unrolling and fills gaps well, giving excellent coverage with no fuss. Being made from ECOSE® Technology, it also has far less itch and smell compared to older-style fiberglass insulation, making the installation much more comfortable.

Overall, Knauf Loft Roll 44 delivers strong thermal performance, is simple to fit even for DIYers, and offers great value for money. Highly recommended for topping up older loft insulation or completing a full retrofit.

Knauf Loft Roll 44 - All Thicknesses

Anonymous

Great product at a good

Great product at a good price

Novia 1600G Radon Gas Barrier - 4m x 20m

Mr M Kent, Herts

Good price on product

Good price on product. Delivered next day by third party courier. Kept informed of delivery status.
👌

Rockwool RWA45 Slab - 1200mm x 600mm - All Thicknesses

Anonymous

Delivered promptly and all in

Delivered promptly and all in order

Celotex PIR Insulation Board - 2400mm x 1200mm - All Thicknesses

Richard

Great product for a recent project, price was very competitive for such a renowned insulation material. Would highly recommend.

Celotex PIR Insulation Board - 2400mm x 1200mm - All Thicknesses

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