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https://www.askthetrades.co.uk/cgi-bin/yabb/YaBB.pl DIY Forum >> Carpentry Questions >> Dormer Windows https://www.askthetrades.co.uk/cgi-bin/yabb/YaBB.pl?num=1257711539 Message started by fred09 on Nov 8^th, 2009, 8:18pm

Title: Dormer Windows
Post by fred09 on Nov 8^th, 2009, 8:18pm

Guys,
When you construct a dormer window do you bolt the wall studs to the strengthened roof trusses or can I fix a base plate to the trusses and nail the studs on?

Title: Re: Dormer Windows
Post by Joiner on Nov 9^th, 2009, 8:20am

By "trusses", do you mean rafters or trimmers?

Title: Re: Dormer Windows
Post by fred09 on Nov 9^th, 2009, 9:55am

Sorry, yep I mean rafters. The front wall of the dormer should be bolted to the rafters using timber connectors or grip washers in between -and then the rest of the dormer sides built off the reinforced rafters ?

Title: Re: Dormer Windows
Post by Joiner on Nov 9^th, 2009, 3:28pm

What you're proposing sounds OK, You've doubled everything up and trimmed the rafters. The dormer timbers just pick up off the rafters and the trimmers/purlins, fixed any way that ensures they're sound.

Title: Re: Dormer Windows
Post by CWatters on Nov 9^th, 2009, 4:47pm

How wide is the dormer?

Title: Re: Dormer Windows
Post by fred09 on Nov 9^th, 2009, 5:41pm

Dormer width?
Well the window is 860 so add on the surrounding supports and it shouldn't exceed 1100 ish (what a pro I am!!) erm.....why?

Title: Re: Dormer Windows
Post by CWatters on Nov 10^th, 2009, 7:54am

That's ok then. It's just that if it was very wide you might need a beam under the ridge.