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is there something about the profile of lintels I'm missing here? there's a lip that support bricks and a lip that supports block and channel between the two.

Yes, it's 15mm. Drilled a small masonory bit @ 150mm then 100mm without hitting anything. so thought I'd pare back the plaster over the lip of the lintel till I found where it ended. Yes the new window faces the gable end of the neighbours wall, so I'm prepared to submit building notice...

I've a bathroom window on the first floor of a gable-end wall (non-loadbearing). Window is 1.200m * 0.9m. I want to install a second window in the bathroom. So I pared back the plaster around the current window to see how far the lintel bearing extended. The lintel supports about 5ft of...

Would have thought that two wall carried all the roof loading and the other two was just masonry loading. Is this incorrect

There seems to be a general rule of 150mm bearing for lintels on loadbearing walls. Does the same reasoning apply to non loadbearing walls? I want to install a new window (0.631 * 0.900) on the first floor in an external non loadbearing wall. Do I still have to allow a 150mm bearing at...

where's the best place to get a replacement programmer from?

The programmer on my Powermax has just failed, when looking at the programmer I noticed a small switch at the bottom with something like P and G on it. The Powermax userguide doesn't say what the switch is for. Does anyone know? thanks,