Old felt roof has corrugated metal overlay so sealed all round. Condensation forming on underside drips on old felt which leaks a bit. I need to gain access through holes either end and spray loads of pour-on (very liquid) sealer so it floods the surface and hopefully finds the cracks. So I need a sprayer with a reasonably long shaft to poke in and let rip. Any sealer and sprayer combinations out there to do this? PS option to remove any part of the corrugated structure not possible. Thanks.
Restricted access felt roof condensation
- Thread starter allex50
- Start date
The solution I have come up with is to cut out long slots between the joists inside (removing the ply overboards. There is enough room to spread out Bostik liquid Bituminous mastic plus if necessary I will remove more of the board between the other joists and staple up some drip barrier on the battens on which the corrugated roof is screwed. As I said removing the metal roof is not an option. it's only a condensation problem, the roof itself does not leak and there is no ingress even under storm conditions. A summer job I think.
Can you get ventilation between the 2 roofs around the perimeter?
I'm going to check my venting. I did allow for passage of air but I think the condensation is overwhelming when ice is on the roof. So i am going to check it out and maybe put in some under skin like on conventional tiled roofs just to catch the drips. Still thinking and maybe if it's just a temp extreme winter thing do the minimum. See how it goes in the spring. Thanks for input. other ideas about getting some liquid Bostik into a confined space (spraying?) welcome.
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