Full Fill Cavity Batt
ROCKWOOL® Full Fill Cavity Batt is a semi-rigid, non-combustible, BBA-approved insulation product for masonry cavity wall constructions.
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Application(s)
- External Wall
- Internal Wall
- Cavity Wall
- Separating Walls
Product description
ROCKWOOL Full Fill Cavity Batt is a semi-rigid stone wool insulation batt for the thermal insulation of external masonry cavity walls and for the thermal insulation and acoustic protection of masonry party walls between dwellings.
Other than in very severe exposure locations with fair-faced masonry, the NHBC accepts the use of ROCKWOOL Cavity Batt in relation to NHBC Standards, Chapter 6.1, External masonry walls, provided it is installed, used and maintained in accordance with the BBA Certificate.
*Subject to application
- Euroclass A1 in accordance with BS EN 13501-1 Reaction to Fire rating
- Thermal conductivity 0.037 W/mK
- BBA approved (Certificate No. 94/3079)
Areas of application
Applications for the Full Fill Cavity Batt are:
- Thermal insulation of external masonry cavity walls
- Thermal insulation and acoustic protection of masonry party walls between dwellings
Documentation

Full Fill Cavity Batt Datasheet
ROCKWOOL® Full Fill Cavity Batt is a semi-rigid, non-combustible, BBA-approved insulation product for masonry cavity wall constructions.

Full Fill Cavity Batt BBA Certificate
Certificate No. BBA-94-3079-Full Fill Cavity Wall Insulation

ROCKWOOL Stone Wool BSI Kitemark Certificate
Certificate No. km06661-bs-en-13162-2012-a1-2015

Cavity Batt Installation Guide
Installation guideline for Cavity Batt ROCKWOOL Products

SUIS ROCKWOOL UK
Safe use instruction sheet ROCKWOOL stone wool insulation products

UK Price List
Price List March 2025

Republic of Ireland Price List
Price List March 2025
Product properties
Name | Value | Test standard | Symbol | Unit |
---|---|---|---|---|
Declared thermal conductivity | 0.037 | EN 826 | λD | W/mK |
Reaction to Fire | A1 | EN 13501-1 | Euroclass | |
Long term water absorption | WL(P) | EN 12087 | WL(P) | kg/m² |
Short term water absorption | WS | EN 1609 | WS | kg/m² |
Product standard | EN 13162:2012+A1:2015 | |||
CE certificate number | 0751-CPR-393.0-01 | |||
Declaration of Performance (DoP) number | UK-WER-0009-02 | |||
BBA certificate number | 94/3079 | |||
KEYMARK certificate number | 003–SDG-5-477232 |
Product variants
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