11.3.17 Wall ties
Wall ties and fixings shall adequately connect the cladding to the frame.
Wall ties and their fixings should be:
- compliant with BS EN 845-1
- fixed to studs and not the sheathing
- in accordance with and of the type specified in the design
- of austenitic stainless steel or assessed in accordance with Technical Requirement R3
- kept clean and free from mortar droppings
- inclined away from the sheathing so that the slope is maintained following differential movement
- capable of accommodating differential movement
- installed at a minimum density of 3.7 ties/m2 for masonry cladding, eg spaced at a maximum of 600mm horizontally and 450mm vertically
- spaced at jambs of openings and at movement joints at a maximum of 300mm vertically and within 225mm of the masonry reveal or movement joint; additional studs may be needed
- spaced within 225mm of the top of the wall, including at gables.
Last updated: 2nd January 2025