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B&Q£7.42Visit shop B&Q - Stainless Steel Type 4 Cavity Wall Tie 275mm 125-150mm Bricklaying Housing
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This guide is for builders and DIY enthusiasts working on masonry projects. The AB Tools Type 4 Cavity Wall Tie provides a robust solution for connecting two layers of masonry, ensuring structural stability and preventing moisture ingress. While highly durable and weather-resistant, its suitability is limited to buildings up to 10m in height.
| Model Part Number | TYPE 4 |
|---|---|
| Brand | AB Tools |
A cavity wall tie's main function is to connect the inner and outer leaves of a cavity wall, providing structural stability and preventing the walls from moving independently.
The 'Type 4' designation typically refers to specific design and performance characteristics, often related to its method of connection and suitability for certain applications as defined by standards like BS EN 845-1.
No, this specific wall tie is rated for buildings up to 10 meters in height according to BS EN 845-1. Taller structures require different types of wall ties.
The double drip is a small projection or bend in the tie that creates two points to shed water. It helps prevent moisture from travelling across the cavity from the outer leaf to the inner leaf, reducing the risk of damp.
Yes, Grade 304 stainless steel offers good resistance to corrosion, making it suitable for many environments, including coastal areas, although higher grades like 316 may be preferred for extremely aggressive conditions.
This tie is specifically designed for cavity widths between 125mm and 150mm. You should measure the gap between your inner and outer walls to confirm compatibility.
It is made from high-quality Grade 304 18/8 austenitic stainless steel.
This is highly unlikely with Grade 304 stainless steel. If rust-like stains appear, it may be from external contaminants or rust from other building materials. Clean the affected area if possible and ensure the tie itself is intact.
Ensure the mortar mix is appropriate for the masonry type and climate. The austenitic stainless steel is malleable, so gentle shaping might be needed, but avoid excessive force that could compromise the wall structure. Ensure sufficient mortar is present in both leaves.
Verify the wall tie is installed correctly with the double drip facing downwards and positioned centrally in the cavity. Check that the tie is fully embedded in mortar on both sides and that there are no other breaches in the wall's water-resistive barrier.
Setup:
Compatibility:
Care:
Due to the stainless steel construction, these wall ties require minimal ongoing care. Once installed, they are protected by the surrounding masonry and mortar. Regular building inspections should, however, note the condition of the masonry and pointing, which indirectly ensures the wall ties remain effectively secured and protected.
