"John Williamson" wrote in message
...
wrote:
Hello knowledgeable shed types.
The roofing has started to deteriorate on my 4X6 single apex sloping shed
roof.
It has to be 20 + years old. It looks to be covered with a kind of
plastic with little 1/2 inch square reinforcement 'string' integral to
its make up. I haven't seen any of this on a roll so. Do I just get the
heavy tar and gravel type roofing felt? The stuff that normally goes on
top of roofing laths and under tiles/slates.
Any advice thankfully received. Cheers

The "Rolls Royce" answer is three layers of roofing felt, all fastened
down and together with hot poured bitumen.

Then again, it *is* a shed, so a single layer of cheap mineral covered
felt, overlapped at the joints and nailed down is the normal answer. or
whatever other waterproof stuff you can find laying round. You might want
to make sure that the wood in the roof isn't rotten.

Crosspost added to uk.d-i-y.


It has done well to last 20 yrs. Roofing felt is not suitable, Idon't think
the bitumous stuff is now available anyway. You want the stuff with a
sanded finish, often green, (protects from UV)
There is also a butyl rubber stuff too. (Similar to pond liner).

If the timber is bad, go for box profile plasticised/galv. steel. They will
cut it to size for you. Various grades. Lasts up to 20 years depending on
grade. Good stuff, easy to fix. Lottsa colours.