Glass Wool Insulation

The versatile glass wool insulation enhances acoustic and thermal comfort in interior spaces cost-effectively. It is one of the most popular types of mineral-based insulation used in homes and commercial buildings, thanks to its excellent performance-to-cost ratio.

What Is Glass Wool? 

Glass wool is sometimes referred to as fibreglass wool or glass insulation wool roll. It is made by melting glass (mostly recycled) and spinning it into soft, interwoven strands. These strands trap air within tiny pockets, forming an insulating layer that slows down heat transfer. Glass wool products have excellent flexibility, fire resistance, and acoustic control.

What Is Glass Wool Used For?  

There are various construction applications where the use of glass wool is appropriate:

• Lofts and attics: Ideal for laying between joists or rafters.
• Walls: Installed in drylining systems, stud partitions, and cavity walls.
• Ceilings and floors: Minimises heat loss and noise transfer between levels.
• HVAC and duct systems: Helps improve efficient energy utilisation and acoustic control.
• Pipe insulation: For ducts and pipework in mechanical systems.

Types Of Glass Wool Insulation

At Insulation Wholesale, we stock a wide selection of glass wool insulation for every kind of build. Available varieties include:

• Glass insulation wool rolls: Flexible and lightweight. Designed for lofts, roofs, and ceilings.
• Glass wool slabs: Semi-rigid panels. Used in walls or partitions where precise fitting is needed.
• High-density glass wool: For areas that require better sound absorption or added structural support. Ideal for industrial settings.
• Foil-faced glass fibre insulation: Offers additional vapour resistance for moisture-prone environments.

Benefits Of Glass Fibre Insulation 

Here’s why glass fibre insulation remains one of the most trusted and widely used materials in construction:

• Excellent thermal performance.
• Sound absorption.
• Non-combustible properties improve building safety.
• Lightweight and flexible.
• Cost-effective.
• Made from recyclable materials.
• Compliant with UK Building Regulations.

Why Choose Our Glass Insulation Wool? 

Here is what makes Insulation Wholesale the go-to store for glass insulation wool in the UK:

• Top-rated brands known for consistent quality and performance.
• Expert advice for trade professionals and DIY installers alike.
• Competitive prices across our entire insulation range.
• Full technical support to help you find the right product thickness and format.
• Fast nationwide delivery (usually within 1–3 working days unless otherwise noted on the product page or at checkout).

Looking for high-quality fibre glass wool insulation? Our range offers premium performance for every budget. Explore options from leading brands such as Isover and Knauf, and shop online for fast UK delivery and unbeatable value.

FAQ

What is glass wool insulation?

This is a fibrous insulating material produced by spinning molten glass into thin strands. It belongs to the mineral wool family, alongside rock wool. Glass wool helps boost heat retention, improve energy efficiency, and increase acoustic comfort.

How does glass wool insulation work?

Glass fibre insulation works by trapping air within its fibrous structure. The trapped air slows heat movement, thereby lowering the rate of thermal transfer in and out of the building.

How to cut glass wool insulation

Measure and mark the cut line. Use an insulation knife or long-bladed, fine-toothed saw to slice through the material. Apply firm, even pressure to get a smooth cut.

Always wear protective gloves, goggles, and a mask when handling glass wool.

How to install glass wool insulation

Ensure proper ventilation during installation. Unroll the insulation and then place it between joists, studs, or rafters. Maintain a tight fit to eliminate air gaps, but do not compress the fibres, as this reduces their insulation capacity. Cover with a vapour control layer to minimise condensation.

Always follow the manufacturer’s installation guidelines.