Insulation

Choosing the Right Building Insulation for Your Project

At County Building Supplies, we supply thermal and acoustic insulation materials for professional builders, contractors, self-builders and DIY customers. Whether you're insulating a loft, upgrading walls or improving the energy efficiency of a property, choosing suitable insulation can help reduce heat loss, improve comfort and support building performance.

Our range includes PIR insulation boards, mineral wool loft insulation, cavity wall insulation, acoustic insulation, multifoil products and cavity closers from manufacturers including Knauf, Mannok and Dacatie.

Thermal Insulation for Walls, Floors & Roofs

Different areas of a building require different insulation materials and installation methods.

• PIR insulation boards: Rigid insulation boards commonly used in suitable wall, floor and roof constructions. PIR offers good thermal performance relative to its thickness, making it useful where installation space is limited.
• Loft insulation: Mineral wool rolls are widely used between and over ceiling joists to help reduce heat loss through the roof space.
• Cavity wall insulation: Insulation slabs and boards designed for compatible masonry cavity wall constructions, helping improve thermal performance.
• Multifoil insulation: Reflective insulation systems used in suitable building applications, with performance dependent on the complete installation and any required air gaps.

Acoustic Insulation & Sound Reduction

Acoustic insulation helps reduce sound transmission through suitable walls, floors and partitions. Mineral wool acoustic products are commonly used within partition systems to improve sound absorption.

County stocks Knauf acoustic insulation products for suitable building applications. The overall acoustic performance depends on the complete construction, including boards, framing, sealing and installation quality.

Choosing the Correct Insulation Thickness

Insulation thickness is an important consideration when planning a project, but thicker insulation doesn't always provide the same improvement across different materials.

Compare the product's thermal conductivity (lambda value) and thermal resistance (R-value), alongside the required performance of the complete building element (U-value).

The correct insulation specification depends on the building construction, available space and applicable Building Regulations. Always check the manufacturer's technical information and project requirements before ordering.

Cavity Closers & Preventing Heat Loss

Cavity closers are used around suitable window and door openings in cavity wall construction. They help close the cavity and can contribute to reducing thermal bridging around openings when correctly specified and installed.

County stocks Dacatie cavity closers in selected sizes. Choose a product compatible with the cavity width, opening detail and required performance.

Need Advice?

Not sure which insulation boards, loft rolls or cavity products you need? Visit your local County Building Supplies branch or contact our team for help identifying suitable materials, calculating quantities and checking product availability.