I've done some lintels and have seen some things that say you should have wall ties within 225mm above a lintel. This would make perfect sense for concrete lintels etc., but I'm wondering whether the cavity lintels act as wall ties too. The docs aren't clear but say it creates stability between the leaves and split lintels require more wall ties. My lintels are thermally broken, but are tied together with metal straps along the bottom.
Brick spacing above cavity lintel
- Thread starter Peter500
- Start date
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That spec doesn't work at all. Either the masonry above a lintel is just infill to wall plate level or there is masonry walling above, in which case there would be a cavity tray in that area. No room for a wall tie.
General specification for wall ties is they should be placed within 225mm of openings. This really refers to the open sides of windows and doors where the general strength is weakened by the open sides. This normally isn't used in reference to lintels. I wonder if somebody has read the 225 rule and applied that incorrectly?
You are right about a cavity tray. The tray goes up 225, so there's nothing to stop me putting ties on the same course as the tray on the inner skin. I will actually have 450mm of masonry above the lintel, and then a flat roof.
The image on this page clearly shows 225 between the top of the window and the wall ties. In fact, it doesn't mention lintels, it's just because it's an opening.
www.ancon.co.uk
The image on this page clearly shows 225 between the top of the window and the wall ties. In fact, it doesn't mention lintels, it's just because it's an opening.
Cavity Wall Tie Spacing and Appropriate Tie Lengths
This post discusses the most common problems associated with the incorrect use of cavity wall ties and how to overcome these.
www.ancon.co.uk
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Each side of the opening is 225mm (every course of block), or do you mean normal spacing i.e. 450mm vertically in my case?
Is the Ancon diagram wrong? It clearly shows 225mm above the openings. Does the same apply to my concrete lintels (going into the garage), or should I put ties on the lintel (as close to the opening as possible or is 450mm fine?
A cavity lintel is in effect one big tie.
. What about the concrete lintels? I'm guessing that those do need ties?DIYnot Local
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