Rubber roof details

[Jupiter01]

Yes you can just use the tape, no point adding additional layers.

But does there need to be a certain amount of overlap when I wrap this around the square pipe?

 

[Jupiter01]

I found this on their website:

How to Seal a Pipe on a Rubber Roof | Rubber4Roofs

This Video Demonstrates the correct procedure to waterproof a pipe protrusion using 9" Uncured Elasto-form Tape (Form Flash)

www.rubber4roofs.co.uk

I don't understand why the first layer is required. Why could the tape not go straight onto the rubber roof?

 

[muh3]

Just had a look at the video, it makes sense, the first layer stops water going under from the side the second one stops it going in from the pipe side. I guess if you do it in one you ask a lot from the tape. Probably still ok to do it in one but better save than sorry.

 

[Jupiter01]

Just one more please: I plan to fit a 5.5mm ply to the wall as my upstand and then use the perimeter bonding on this to stick the rubber to this before the metal flashing goes over it.
When I put my edging details on, some will go on this slightly raised ply and rubber roof and the other bit on the brick wall. I assume that is okay?

 

[muh3]

I wouldn't fit ply to the brick wall, bond the rubber straight on the brick wall and install the metal flashing.

 

[Jupiter01]

I wouldn't fit ply to the brick wall, bond the rubber straight on the brick wall and install the metal flashing.

aah, the plywood suggestion came from this forum. I thought it would provide a flat surface that would help with bonding of the rubber?

 

[muh3]

It does not need to be flat, the metal trim will hold it well in place and cover it. if you fit ply on the wall you got the problem the the metal trim does not go far enough in the brick and water will track down the wall, blow the ply and might leak. just follow the videos. It is a good system and if you follow everything you will get a good result.

 

[muh3]

Here mine from the top.

 

[Jupiter01]

My roof will have a slight fall away from the wall. This will create a tiny gap where the 18mm OSB meets the wall as it has a straight edge. Previously I thought I would slide the plywood upstand into this but I agree, its worth leaving that out. Will this gap be an issue at all?

 

[muh3]

You could cut the OSB on a slide angle so it meets the wall, or just caulk the gap or just leave the gap, it will not be an issue. My roof also got a fall but I don't remember what i did

 

[Jupiter01]

Thanks and you've been super helpful!
Looking forward to this job

 

[Jupiter01]

I dry fitted the deck yesterday and have now ordered the rubber layer.

When cutting or screwing OSB boards, there is some wood chips that spread and become prickly. Is the rubber resilient enough to cope with this or should I be sending it down? Perhaps sanding makes this surface worse?

 

[muh3]

Looking good, I would sand them if they stand up, alternatively you could use a countersink before you put the screws in.