Matt64

Thanks very much all for your help, think I've got a good steer on it now. Will post some pics when things get to that point.

Thanks Simon, really useful. I like the idea of more glazed area and better rain protection. Why no need for vertical DPC though? Just because water can't track through the window frame to the plaster? Cheers.

That is great - thanks very much for the sketch and your time! Out of interest, the stainless bracket for mounting the windows behind brickwork - is it primarily to reduce thermal bridging? Or to help with vertical DPC installation (or both?). I've looked into uPVC typical installation and they screw into the brickwork, so I was thinking of incorporating the vertical DPC as below. bearing in mind I only have 100mm cavity unlike your 200mm.

Thanks Peter - this detail would be on some narrow slot windows (460mm wide) and lintels are easily wide enough to cover lost blockwork. Cold bridge and DPC are very good points, that's what I'm not quite clear on. Also I'm not clear how the typical uPVC frame is fixed, would I even need the timber bit? Is it the frame only attached to the brick? If so i could remove the thermal bridge and add a DPC.

@joe90Thanks for the pics on this thread, I'm new and this is my first post. I've been searching for angled/splayed window reveal details with little luck. My 60's semi and extension has standard cavity wall 300mm (brick,insulation,block) buildup, and wonder if this sort of reveal is possible with uPVC windows? As typical details use standard cavity closers, which I can't see working at an angle, so was thinking about just using some PIR board cut at an angle as a closer instead (a bit like this http://tonyshouse.readinguk.org/air-sealing-windows-and-doors/) I have butchered one of my architects drawings to show what I was thinking, a bit of timber against the brick face to support uPVC frame, then angled PIR board (red) for cavity closer with plasterboard on angle (maybe with a bit of ply underneath it?) I really like your angled door reveals as well, so I suppose same question applies for uPVC composite door detail. Any suggestions much appreciated!

Hi All, Going for a second extension and remodel of our 60's semi in Cheshire/Peak district due to expanding family and ridiculous house prices. Trying to get a bog standard house to perform decently (not passive) and switch to 100% electric while having some nice details without the builder looking at me like I'm crazy. Lots of google searches lead to this forum, so thought I'd best join. Thanks for the help in advance! Matt