My company is building a 32′ wide x 16′ one story addition to the rear of an existing colonial. To keep from losing windows on the second floor, customers would like to do a flat roof. I am wondering if somebody with more experience could shed some light on the best way to frame this. My original thought was to lay out tgi floor joists to span the 16′. Plywood over this with 1/2″ cdx. Then lay out tapered 2x sleepers to make a low slope hip and 5/8″ cdx sheathing on that to slope water away from house but give me an even fascia. I am wondering if It is necessary to add the sleepers or if somebody has a good system for doing this.
Thanks for any help. Mike
Replies
a pitched roof with window scuppers.
Jeff
Buck Construction Pittsburgh,PA
Fine Carpentery.....While U Waite
Jeff, Thanks for the suggestion but the design is a flat roof or nearly flat what I am looking for is a good way to frame this with the least amount of labor & materials that will satisfy customer & me with no call backs.
Mike
mike.. i thot flat roof is just another way of saying "call back"Mike Smith Rhode Island : Design / Build / Repair / Restore
Mike, I know what you mean and i guess i am trying to avoid that if possible. I would frame a regular hip but I think the span 16' is a bit to much for conv. lumber.
Why not land the sleepers right on top of your joists, then lay down your decking? Why duplicate the decking?
Don't consider a mop-down finish. Lay down a membrane or forget it.
My local lumber yard may have a solution, They are suggesting a hip roof frame with I joists with a 2 pitch. We will see what happens! Thanks for the suggestions.
Mike
Go with the TJI idea with 3/4" cdx. Go to a roofing supply house and purchase tapered poly-iso insulation. Adhere a layer of EPDM roofing.
It's a good system to reduce call backs.