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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...

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...

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,