Johnson’s Insulation Supplies Ltd, Johnson House, 3 Victoria Way, Burgess Hill, West Sussex, RH15 9NF
COLLECTION ONLY FROM BURGESS HILL, 3 VICTORIA WAY, BURGESS HILL, RH15 9NF. CONTACT US DIRECTLY FOR DELIVERY REQUESTS AND COLLECTIONS FROM OTHER DEPOTS
URSA Cavity Batt 35 - Glass mineral wool cavity wall insulation available to order
URSA Cavity Batt 35 is a high-quality glass mineral wool cavity insulation slab designed for use in external masonry cavity wall construction. Suitable for both full fill and partial fill cavity wall insulation, it can be installed up to 25 metres in height for full fill applications and without restriction when used as partial fill in domestic and non-domestic buildings.
Whether specified as URSA 35 cavity wall batt insulation for housing developments or selected for general masonry construction, it provides dependable thermal performance within traditional brick and block cavity wall systems.
Thermal performance and U-value targets
With a declared thermal conductivity of 0.035 W/mK, including commonly specified options such as URSA 35 cavity wall batt 0.035W/mK 75mm, this insulation supports compliance with Approved Document L and current energy efficiency standards.
The 0.035 lambda rating makes URSA cavity batts 35 a practical solution for achieving required U-value targets in new build houses, extensions and low-rise developments. Designed specifically for cavity wall insulation slabs, it ensures consistent thermal coverage across the external wall build-up.
Installation of Cavity Batt 35 within masonry cavity walls
Manufactured at a nominal density of 22kg/m³, URSA 35 cavity wall batt insulation offers lightweight handling while maintaining a secure friction fit between wall ties. This helps reduce gaps, supports insulation continuity and improves overall thermal integrity within the cavity.
The slabs are designed to suit standard cavity widths and integrate easily into brick and block wall construction. URSA cavity batts 35 may also be used within masonry party and separating walls, contributing to both thermal and acoustic performance.
Fire performance and compliance
URSA Cavity Batt 35 is classified as Euroclass A1 non-combustible, providing reassurance where fire performance is critical. As a non-combustible glass mineral wool insulation, it meets stringent safety requirements commonly specified across residential and commercial developments.
Material availability across our 3 coverage regions
URSA Cavity Batt 35 is supplied as rigid insulation slabs in thicknesses of 75mm, 100mm and 125mm, allowing selection based on cavity width and required thermal specification. If this material interests you, take a moment to view our URSA cavity batt 32 which is a similar offering for strong cavity wall performance.
Orders can be placed for collection from our depots in West Sussex, Hampshire and Kent, with delivery arranged to surrounding areas upon request. Where additional insulation materials require accurate preparation, our cut-to-size service is available from West Sussex and Hampshire depots.
Johnson’s Insulation Supplies continues to support house-builders, contractors and developers with reliable cavity wall insulation products, competitive pricing and dependable stock availability across the South of England. We look forward to supporting you.
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Most orders can be cut and delivered within two days! There’s no dust, No Damage, No Waste… Job done!
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Most orders can be cut and delivered within two days! There’s no dust, No Damage, No Waste… Job done!
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