Had water damage in the summer house where the sea water rose up into the underfloor. Now everything is torn out, and two large dehumidifiers are running. I have now discovered that there are quite large gaps between some boards in the underfloor; it's tongue and groove nailed from underneath. So to the question, how do I proceed? What are my options?
Gypsum board on existing tongue and groove from below?
Or a façade EPS foam? New tongue and groove?
Expanding foam in the gaps?
What would you have done? I am considering the foam as there's only space for 120mm insulation in the compartments, and I would like a bit better insulation, but I'm worried about condensation (?)
Gypsum board on existing tongue and groove from below?
Or a façade EPS foam? New tongue and groove?
Expanding foam in the gaps?
What would you have done? I am considering the foam as there's only space for 120mm insulation in the compartments, and I would like a bit better insulation, but I'm worried about condensation (?)
Difficult situation there, is the flooding "unique" or is there a chance it could happen again?
Since it's a summer house, I would probably consider if it's possible to raise it and put it on pilings instead to avoid future problems.
Since it's a summer house, I would probably consider if it's possible to raise it and put it on pilings instead to avoid future problems.
If the råspont is dry and fresh, I would just put in wind barrier and then mineral wool. If I wanted more insulation, I would install foam board from below using screws and large washers. Just don't use too much foam board, or you might end up with a houseboat if the water rises again.. lol
One option is to insulate with spray polyurethane in the compartments, then it's guaranteed to be both tight and properly insulated. But as racer says, be careful so your cabin doesn't become a raft =)
Good luck
Good luck