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Reading through a Permitted Development guide on an architectural firm's website led me to the following... I always thought that the eaves height of the entire extension was caught by the "2 metres from any boundary" rule, not just the two storey part of the extension?

Thanks for the reply, I'm very keen to avoid purlins, as this would spoil what I'm trying to achieve. A closer look at the span tables shows that this should be achievable with some readily available timbers.

I'm currently planning a single storey rear extension, and would like to know if my idea for a vaulted ceiling would be prohibitively expensive/difficult. Essentially, it's a dual pitched roof with a 7m span, 4m length, 18deg pitch. With a steel ridge beam in place, this puts the rafter span...

Tried this last night, and exactly as you said, the lever returned to auto... I guess this points to a problem with the programmer?

Nope - it's a Drayton LP522. Also, I forgot to mention that the problem also occurs when trying to switch the central heating on. So the pattern is: switch CH to on, then switch HW to on, then off - boiler then fires...

I've got an issue that has recently developed in my HW/CH system.. In order to get my boiler to turn on for the hot water, on the controller I must switch the HW to on, then switch the CH heating on & then off. Once I do this the boiler will fire. Could this be the 3 port valve sticking?

I've got an issue with my heating/hot water in that to get the boiler to turn on: I have to switch the heating on on the controller, then switch the hot water on then off. (This also works the other way round). But, just switching on either the CH or HW will not get the boiler to turn on...

Brilliant, thanks very much for your help. Lets hope it's the former!

Semi... But the right hand wall in the pictures is the party wall between us.

I'm currently planning a single storey rear extension with a knock through into the current living room. Before speaking to a SE, I'd like to clarify if what I'm thinking of doing is possible.. I am hoping to have a steel installed where the current patio doors are, but would like to...