BLD/General/TBT-BLD-024
Cavity Wall Construction Safety
Building & Structural Works › General › Cavity Wall Construction Safety
Toolbox Talk
Cavity Wall Construction Safety
Cavity wall construction involves building two leaves of masonry with an insulated cavity between them. The work requires manual handling of heavy blocks and bricks, working at height from scaffolds, and careful attention to wall ties, insulation placement, and cavity barriers. This talk covers the specific hazards and controls for cavity wall construction on site.
Key Hazards
Musculoskeletal injuries from repetitive handling of heavy blocks and bricks
Falls from scaffold platforms during external leaf construction at height
Wall instability during construction before ties and permanent supports are installed
Dermatitis from prolonged skin contact with wet mortar and cement
Control Measures
- Use mechanical aids such as block grabs or mini cranes to lift materials to scaffold platforms.
- Ensure scaffold platforms are at the correct working height to avoid excessive reaching or bending.
- Install wall ties at the spacing and pattern specified in the structural design drawing.
- Wear alkali-resistant gloves when handling wet mortar and cement to prevent contact dermatitis.
- Install cavity barriers and fire stops at the locations specified on the design drawings.
- Ensure insulation boards are cut to size with appropriate tools and dust control measures.
- Check that scaffolding is adjusted to maintain the correct working height as the wall rises.
- Brace partially built walls against wind loading as specified in the method statement.
- Brief the team on the build sequence, tie pattern, and cavity barrier locations each morning.
Remember
- Use mechanical aids to lift blocks and bricks to scaffold level to reduce manual handling injuries
- Install wall ties at the exact spacing and pattern shown on the structural design drawing
- Wear alkali-resistant gloves when handling wet mortar to prevent cement contact dermatitis
- Cavity barriers and fire stops must be installed at every location shown on the design
- Brace partially built walls against wind as specified in the construction method statement
- Adjust scaffold platform height as the wall rises to maintain a safe working position
Applicable Legislation: CDM Regulations 2015 · Manual Handling Operations Regulations 1992 · Work at Height Regulations 2005 · BS EN 1996 (Design of Masonry Structures)
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