Can this garage roof be patched?

[ctsamados]

My garage roof was leaking for a number of years after some cowboy builders stuck a rubber membrane down over the top of an existing chipboard roof, then fitted a plasterboard false ceiling.


I've now stopped the garage leaking (covered in another thread) but I've had to pull off the plasterboard ceiling which was rubbish and started going mouldy, so I can replace it with plywood.

However i've now discovered that some of the chipboard has warped and in one section there's a hole. My question is, is there any way to patch the ceiling from the inside?

I have to be mindful screwing anything into the ceiling as I don't want to pierce the rubber membrane.

I've attached some photos of the worst bits.

Thanks.

 

[freddiemercurystwin]

Surely the membrane above is draping into those voids?

 

[Notch7]

However i've now discovered that some of the chipboard has warped and in one section there's a hole. My question is, is there any way to patch the ceiling from the inside?

just cut the EPDM and repair from the outside

its pretty easy to patch a rubber roof

 

[ctsamados]

I think they're must be a few layers of wood, as I've walked around on top of the roof loads and there's no bits where it's given way.

 

[Notch7]

I think they're must be a few layers of wood, as I've walked around on top of the roof loads and there's no bits where it's given way.

pull out a chunk of the wet chipboard and find out whats going on

if its been overboarded..........its not actually doing anything

 

[ctsamados]

That's what I'm thinking, though those bits are where the roof was leaking before.

If I do it, is there a way I can slot in wood somehow?

 

[catlad]

Its been leaking for years!!! and now it has mould growing!!! Start again!!!

 

[foxhole]

That's what I'm thinking, though those bits are where the roof was leaking before.

If I do it, is there a way I can slot in wood somehow?

Pointless

 

[cdbe]

If you look at the guys other post, which shows the now "kind of" repaired roof from above, why it can't be patched in a few areas from below (bit of board held up with battens fixed to the joists).

 

[freddiemercurystwin]

If you look at the guys other post, which shows the now "kind of" repaired roof from above, why it can't be patched in a few areas from below (bit of board held up with battens fixed to the joists).

Looks like a temporary bodge to me.

 

[ctsamados]

I'm not going to start again, as that would be a huge job, I'm not a roofer and I don't want to spend another £2000 + to fix it.

It's also waterproof now, so I was just going to patch it inside to make it a bit more protected from weather conditions.

 

[cdbe]

Looks like a temporary bodge to me.

It's flashband...... I think I suggested on the other thread chasing and leadmating some EPDM angle flashing trims in but flashband it is.

 

[ctsamados]

Because I didn't have an angle grinder to do that.

I've also put three coats of liquid rubber paint over the join.

It's worked, that's what matters

 

[stevie888]

It's a bodge, but if the membrane is intct then giving it support to keep it tha way seems sensible to me. I'd pull out the rotted chipboard and check if there is another layer of decking over: seems likely if the roof isn't bouncing. Cut a few bits of 3/4 ply to fit the holes and batten underneath to support. If you can see the membranr then cut the patches neat.

Hopefully you'll get a few more years out of it

 

[ctsamados]

Yes it is a bodge but a bodge done out of necessity as I unfortunately don't have the money to pay for a second replacement roof.

I'm going to pull away the rotten chipboard when I get a chance and see what's going on. I'm pretty sure there must be another layer of something, as the roof is still rigid on top.

When you say batten it how do I attach the battens, screw them into the decent parts of chipboard, or the beams?

Thanks.