11,378 views ·
34 replies
11k views
34 replies
Poor quality roofing felt?
You have the roofing felt on the roof to keep it watertight, right?!T Ejmelie said:
Not having any visible nail holes likely means a more secure construction regarding tightness.
What does the installation instruction for through-nailing look like, is it a dab of asphalt adhesive on every visible nail head then?
I'm about to lay roofing felt myself soon, it will be concealed stapling for me.
I think Krille-72 also meant functionality and not aesthetics.
I have laid such tar paper on numerous occasions and both nailed and stapled. Always hidden.
When the adhesive edge of the next strip is laid over the nailed strip's top edge, it bonds incredibly strongly. I had my Attefall roof like this for 3 months in autumn 2018, and it stormed and rained quite a bit. I only forced a batten on the sides. There was not supposed to be any batten at all since it ended up being a standing seam metal roof.
So, hidden nailing and glue the next strip above your nails/staples!
PS. There is a paper protection that should be removed from the adhesive edge. The easiest way is to roll out the entire strip, place a few staples at the top edge when it's straight and wrinkle-free. Then remove the paper from the adhesive and press it so that it bonds with the layer below!
When the adhesive edge of the next strip is laid over the nailed strip's top edge, it bonds incredibly strongly. I had my Attefall roof like this for 3 months in autumn 2018, and it stormed and rained quite a bit. I only forced a batten on the sides. There was not supposed to be any batten at all since it ended up being a standing seam metal roof.
So, hidden nailing and glue the next strip above your nails/staples!
PS. There is a paper protection that should be removed from the adhesive edge. The easiest way is to roll out the entire strip, place a few staples at the top edge when it's straight and wrinkle-free. Then remove the paper from the adhesive and press it so that it bonds with the layer below!
I'm also not talking about the aesthetics but which you think is best from a leakage point of view. I apologize if you misunderstood my post in any way. Not my intention.T Ejmelie said:
Hidden nailing is preferable. In this heat, the adhesive pulls together quickly. Put on the battens as soon as you can.
That is my standpoint on how to build a safe roof.
Construction veteran
· Norrland
· 342 posts
The best thing, as mentioned, is to have hidden nailing. You usually only double-nail the felt if you're laying two layers of felt, i.e., one layer of underlay felt (which is double-nailed) then a layer of finishing felt or shingles (which is nailed hidden). At work, we usually lay a strip, peel off the plastic at the upper seam, and nail it completely; then lay the next strip, leave the plastic on the bottom edge but peel it off at the top, then nail it completely as well, and then remove the plastic in the joint that was covered. We usually take "ant steps" over the seam to ensure everything is sealed properly. When it's this warm, the felt almost vulcanizes together. If it's going to be a while before you plan to batten and lay tiles, you can just throw a few boards over the seams so you have both belt and braces to keep the felt from blowing away 
Member
· Västra Götaland
· 3 530 posts
To Ts: if you don't have the energy to replace the pappen, you can go over all the nail heads with a bit of roof adhesive or roof sealant on each head. There are a lot, but your roof is small.
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