Choice of Felt on Balcony

[Gruffan]

Hello!

We are having problems with rainwater leaking in through the balcony and into the hallway below. I've been advised to lay roofing felt on the balcony floor and up a bit on the wall under the outer façade.

When we went to the building supply store, there were several different types of felt, so which one should I choose?

 

[etompau]

Identify where and how it is leaking. After that, the correct action can be taken. A picture of what it looks like can help understand your problem and its extent.

 

[falkn]

What kind of balcony is it? Floor structure? Concrete balcony on a wooden house? Is there space to lay a surface layer above the felt (decking or other)?

 

[Gruffan]

What kind of balcony is it? Floor system? Concrete balcony on a wooden house? Is there room to lay a surface layer over the tar paper (decking or something else)?

This particular part is an old house with horizontal timber, the balcony is an addition from the 40s and has a concrete floor.

Right now, this older part of the house has fiber cement boards that I will take down, and since I got the idea of tar paper on the balcony floor and up the wall, I thought I would start with this part..
The answer to your other question is yes, decking or similar will fit over the tar paper.

 

[Gruffan]

hello! old pictures. No moss or similar on the balcony. It leaks from the balcony down to the front door. We have had a carpenter on site so it is not something we have made up ourselves.

 

[TrädgårdsBjörnen]

I would suggest a welded felt, e.g. https://eurotema.se/produkter/temaflex-sbs5500/

Aim for a 30 cm upturn for good protection for a long time.