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Cills..

Moggaman · 2021-05-14 12:00:30

Am I right in saying a 250mm 260mm cill is the right one for a 350mm cavity wall (150 cavity).. That means the window will sit on the insUlation about 70mm into the insulation ?.. a 200mm wide cill would be a bit on the narrow side.. what’s the norm pls?.. just rendered on outside ...

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14-05-2021 1:00pm

#1

Moggaman

Registered Users Posts: 348 ✭✭

Join Date: February 2010

Posts: 219

Am I right in saying a 250mm 260mm cill is the right one for a 350mm cavity wall (150 cavity)..
That means the window will sit on the insUlation about 70mm into the insulation ?.. a 200mm wide cill would be a bit on the narrow side.. what’s the norm pls?.. just rendered on outside ...

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#2 14-05-2021 1:42pm
BryanF

Moderators, Home & Garden Moderators Posts: 10,140 Mod ✭✭✭✭

Join Date: October 2010

Posts: 9844

Suggest you Draw the detail section. With out one you won’t know how your insulation continuity and air-tightness will work.

Personally I’m a big fan of the insulated type. Less thermal bridging issues.

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