Q1: What are wall ties used for?
A1: To connect the inner and outer leaves of cavity walls, ensuring stability and load transfer.
Q2: Can I use the same tie for all wall heights?
A2: No. Lighter-duty ties are for domestic builds up to 10m, while heavy-duty ties like VST1 are needed for taller structures.
Q3: What is the difference between restraint straps and joist hangers?
A3: Joist hangers support joists; restraint straps tie walls and floors/roofs together for stability.
Q4: How are starter ties installed?
A4: They’re fixed into existing masonry using plugs or screws, allowing new walls to be tied in.
Q5: Do I need stainless steel or galvanised?
A5: Use stainless in coastal or highly corrosive environments; galvanised suits most indoor/dry environments.
Q6: What standards do these products meet?
A6: BS EN 845-1 for metal components and BS EN 10346 for material coating quality.
Q7: Are helical ties suitable for all retrofits?
A7: Yes, especially for irregular masonry or where original ties have corroded.
Q8: How many wall ties are needed per square meter?
A8: Typically 2.5 ties per square metre for standard construction, but this may vary with design.
Q9: Do wall ties need insulation clips?
A9: Yes, to hold insulation in place and prevent it from slipping in the cavity.
Q10: What’s the minimum embedment depth for ties?
A10: Generally 50mm into each masonry leaf, or as specified by manufacturer and regulations.
Q11: Can metalwork be used in timber frame construction?
A11: Yes – many fixings, including frame cramps and timber hangers, are designed for timber frame systems.
Q12: How do I install restraint straps?
A12: They must be nailed or bolted to timber elements and fixed to masonry with appropriate anchors.
Q13: What are movement ties?
A13: These allow differential expansion and contraction in long wall runs without cracking.
Q14: Can I reuse wall ties or joist hangers?
A14: No – always use new fixings to ensure structural integrity and code compliance.
Q15: Are your products CE and UKCA marked?
A15: Yes, most builder metalwork and wall ties meet both CE and UKCA certification requirements.
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