Best type of wood sheets to use on shed roof ?

bakerlite

Just wondering if anyone had experience in DIY shed building.
Would I be better of with wpb or osb for roof (with felt over) ?
Thanks!

GinSoaked

Neither Treated 6 x 1 (thats nominal so about 5 3/42 by 5/8")

It can't delaminate is treated so it won't rot and its the traditional material to use.

Ideally you want to keep it in the dry for a couple of weeks before using it as it so it won't shrink much more when on the roof but thats not essential.

CJhaughey

I have OSB on my shed roof, its covered in breathable felt, I think Corotop is the brand name of a similar product and then the metal tek screwed down to the rafters.

Lumen

Marine ply > WBP > OSB. OSB needs to be really well protected as it swells like a bstard when wet.

And ventilated roof is better, not least because the temperature inside will be much more stable (won't overheat when the sun is beating on it).

Is felt still worth doing these days? There are cheap-ish and more solid alternatives, e.g. Gusclad "slates" were recommended to me.

Leftyflip

I've a small shed I put some 12mm OSB and shed felt on the top.
It's been battered by rain and not a bother, mind you I did make sure to fully seal everything.

CJhaughey

I think a huge part of the relative dampness of a shed is the base detail.
I put 3" crushed rock and covered it with plastic, then a 2" insulation and remesh. It takes a fair while to dry but once dry the shed is very dry inside.
The problem I see is people just pour a slab directly on the ground and the shed is constantly humid because of the concrete never getting dry.
Moisture has to go somewhere and then the problems start with internal condensation.

99nsr125

bakerlite wrote: »

Just wondering if anyone had experience in DIY shed building.
Would I be better of with wpb or osb for roof (with felt over) ?
Thanks!

None

Use plastic sheeting
Light and durable