Description

Celotex Cavity Batts 100mm (1200×450) 3.24m2 CW4100

Celotex Insulation / Xtratherm / Recticel / Kingspan / Unilin / Ecotherm

Upgrade your masonry cavity wall’s thermal performance with this high-efficiency Celotex Cavity Batts 100mm, sized at 1200 mm × 450 mm and covering approximately 3.24 m² per pack. This rigid board features a PIR (polyisocyanurate) foam core with low-emissivity foil facings on both sides, delivering excellent insulation in partial-fill cavity wall applications.

With a thermal conductivity of approximately 0.022 W/m·K, it provides outstanding thermal resistance and helps meet stringent building-regulation U-values. The 100 mm thickness makes it well-suited for 90-100 mm cavity systems or when higher performance is required without a much wider cavity.

Boards are factory-cut to standard size for wall-tie spacing (1200 × 450 mm), helping speed up installation and reduce waste.  The foil facings also improve long-term performance by limiting air and radiant heat exchange within the cavity. Additionally, the boards are lightweight, dimensionally stable, and built for long service life.

Ideal for new builds, extensions, or retrofit projects, this insulation board supports improved energy efficiency, reduced heating costs, and compliance with regulations. However, as with all cavity wall insulation, correct installation and remaining cavity width (for drainage/ventilation) must be ensured.

Key Features

• Board size: 1200 mm × 450 mm, coverage ~ 3.24 m² per pack.

• Thickness: 100 mm – high-performance partial fill option.

• Material: Rigid PIR foam core with low-emissivity foil facings.

• Thermal conductivity: ~ 0.022 W/m·K.

• Compressive strength (typical): ~ 120 kPa (for this board range)

• Certified for partial fill cavity wall applications.

Benefits

• Superior insulation performance: The 100 mm thickness and low conductivity extend energy savings and improve comfort.

• Installation ease: Pre-sized for standard wall-tie spacings reduces cutting and waste.

• Long-term durability: Foil facings and rigid core contribute to stability, moisture resistance and lifespan.

• Energy and cost savings: Helps lower heating demand and supports compliance with building regs.

• Versatile use: Suitable for new, existing or extension cavity wall builds where improved thermal performance is required.

For bulk orders or trade pricing, contact us for a competitive quote.
If you have any questions regarding this product call 0113 204 7303 or contact us here.