Designed to fill the gap between inner and outer masonry leaves, these materials play a vital role in reducing heat loss and improving energy efficiency throughout your property. Whether you're working on a new build or upgrading an existing structure, fitting the right product into your external walls can make a noticeable difference to comfort levels and heating bills.

You'll find options available in both slab and roll formats, typically made from glass mineral wool. Slabs are precision-cut to slot neatly between standard wall ties without requiring additional fixings, whilst rolls offer flexibility for varied stud spacings. Many products carry non-combustible ratings and water-repellent properties, making them suitable even for properties in exposed locations.

Beyond thermal performance, several options also deliver excellent acoustic benefits, helping to reduce noise transfer between rooms or from outside. With eco-friendly manufacturing processes becoming increasingly common, you can often find products that are free from added formaldehyde and produce minimal dust during handling. Bulk quantities are ideal for larger projects where coverage requirements are substantial.