Where to buy 100mm insulation?

You can buy 100mm insulation online directly from Insulation Wholesale. We stock and supply insulation in standard thicknesses used across UK construction, including 100mm insulation thickness options. Our shop makes it easy to compare products. Browse our site to check availability and get advice from a team that understands site conditions, not just specifications.

How good is 100mm insulation?

On matters insulation, 100mm thickness provides strong resistance to heat movement when installed correctly. Its performance depends on the material, but the thickness itself is enough to make a clear, measurable difference to energy efficiency in most buildings.

How to cut 100mm insulation?

Cut 100mm hard insulation using an insulation saw or hand saw. Measure and cut slightly oversize. Then press it into place. A tight fit matters more than a perfect edge.

How much is 100mm insulation?

100mm insulation boards vary quite a bit in price depending on material and performance. For basic PIR boards, prices are £25–£35 per board (for a full 2400 × 1200mm 100mm insulation board) when buying single units. Higher-performance or specialist boards can cost more, sometimes £40 or more per m² for premium products. If you buy in bulk, prices often move down further, but expect a rough range of £25–£50+ per board before VAT.

100mm Insulation At Low Wholesale Prices

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100mm Knauf DriTherm 37 Cavity Wall Insulation Slab 455mm x 1200mm 6.55m2 Pack

100mm DriTherm Cavity Slab 37 is a water-repellent Glass Mineral Wool slab, designed for use in external full-fill masonry cavity walls, that offers excellent thermal performance. It is non-combustible with the best possible Euroclass A1 reaction to fire classification

£37.66£45.19 Ex VATInc VAT
£5.75£6.90 Per m2 Add to cart

100mm Insulation

Products in 100mm Insulation

100mm Knauf DriTherm 37 Cavity Wall Insulation Slab 455mm x 1200mm 6.55m2 Pack