how to build a wooden frame for a felted apex roof to put over my leaking concrete flat-roof

I'm considering building a wooden frame for a felted apex roof to put over my leaking concrete flat-roof. What's the best ways of going about it? Where could I find some plans?

tia

Reply to
usenet2012
Loading thread data ...

The quickest and easiest is to use roof trusses. You will likely find a standard size will fit. If not, they will make one up for you. All you need to decide is what tiles you are using (hence weight/sq metre) and they will tell you what distance to put them apart.

Reply to
harry

Read what is written...

I'm wondering why this has to be an apex roof, what's wrong with a "flat" roof constructed with a decent fall and covered with GRP or even felt as the OP wants to use felt for some reason. Felt will fail on an apex roof just as well as it will fail on a flat roof...

Be a lot simpler and easier to build a flat roof than an apex one. Joists lifted a inch or so above the existing roof, firing pieces attached to top, or different sized spaces underneath to get the fall, covered in 18 mm OSB3 and Bob is your fathers brother.

Reply to
Dave Liquorice

Fix a down a 4x2 or similar "plate" along the two wide edges.

Decide what kind of angles and overhangs etc you want (20 deg looks ok for a felted roof IMHO), and make a pair of rafters up to check. Cut birds mouth joints in the eves ends to sit on the wall plate. Allow for a ridge beam between them at the other end.

If that looks ok, use one as a pattern to make as many as you need. Nail/screw em all together. Fit a few A frame style restraining joists across the span (does not need to be every pair). Then board and felt away... (a couple of layers of torch on modified bitumen felt does a nice job - 2mm underlay and 4mm mineral finish cap sheet)

Reply to
John Rumm

Thanks John.

Reply to
usenet2012

HomeOwnersHub website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.