fixing shed roof

andrewf75

Hi all,

I'm going to replace my leaking shed roof with EPDM. The roof is a slight slope made of tongue and groove boards, which have slightly rotted where the leaks were - I think a couple of them need replacing, but mostly the structure is fine. I know that EPDM is generally glued down, but I'm thinking is it really necessary? My shed currently has wooden battens which I'm planning to use to hold the edges. Surely that will hold it? I guess my thinking is that the rubber is likely to outlast the roof so if I glue it and the roof falls apart a few years down the line I won't be able to re-use the rubber. Also the glue is expensive!

Any thoughts much appreciated!

[Deleted User]

My friend just did mine and used a staple gun. Just used the glue on the middle piece where it overlapped.

andrewf75

It sounds like he used felt though (I hope!)

EssexExile

I just covered the roof with 9mm OSB & glued the rubber to that. It's going to be there for decades, may as well do it right.

andrewf75

EssexExile wrote: »

I just covered the roof with 9mm OSB & glued the rubber to that. It's going to be there for decades, may as well do it right.

I thought about doing that, but then I may as well just replace the rotten boards and glue to what I already have. The roof is clearly not going to get wet under the EPDM so presumably its going to last decades as well?
I'm probably over-thinking this, its only a shed!

Head_The_Ball

Replace any rotten boards. It would be false economy not to as they may continue to rot and eventually sag or disintegrate.

Use glue. It will help to keep the EPDM flat.

If you ever demolish the shed you should find the EPDM easy to peel off for reuse.

We demolished a shed with an EPDM roof last year. The EPDM came off the roof easily. We could have reused it had we had a use for it.

gamston

what are you using to cover the old felt ?
do they now do a glue that goes on old felt ?

I recovered the roof of the dormers at home a few years ago
at that time they didn't do glue that allowed you to stick EPDM to old felt, so I fixed new external plywood to old roof then glued on the EPDM then fitted the EPDM trims,
I would use the premium trims even on a shed, they do look better (I have 2 sheds 1 with each of the trims, and the premium ones are better)

getmore4less

https://forums.moneysavingexpert.com/discussion/5841010/fixing-shed-roof

Same shed?

andrewf75

Head_The_Ball wrote: »

Replace any rotten boards. It would be false economy not to as they may continue to rot and eventually sag or disintegrate.

Use glue. It will help to keep the EPDM flat.

If you ever demolish the shed you should find the EPDM easy to peel off for reuse.

We demolished a shed with an EPDM roof last year. The EPDM came off the roof easily. We could have reused it had we had a use for it.

Great thats reassuring. I will replace the rotten roof boards and glue the EPDM.

andrewf75

gamston wrote: »

what are you using to cover the old felt ?
do they now do a glue that goes on old felt ?

I recovered the roof of the dormers at home a few years ago
at that time they didn't do glue that allowed you to stick EPDM to old felt, so I fixed new external plywood to old roof then glued on the EPDM then fitted the EPDM trims,
I would use the premium trims even on a shed, they do look better (I have 2 sheds 1 with each of the trims, and the premium ones are better)

I'm just taking the old felt off, it was nailed on so can glue direct to the wood using water based adhesive. The shed has wooden battens so planning to use those, looks unimportant just want it watertight.
Thanks

andrewf75

getmore4less wrote: »

https://forums.moneysavingexpert.com/discussion/5841010/fixing-shed-roof

Same shed?

yep the same, takes me a while from thinking about doing something to actually getting round to it!