hi all
my house has an extension that does not have any masonry foundation underneath, instead, the whole section sits on steel beams and columns (i suppose that's called a pier foundation?). hence, the underneath of the whole section is exposed to the exterior elements. the square footage is about 554 sq ft.
currently, there are multiple cement board panels that are attached to the underneath frame of the house through screws. i suspect that once the panels are removed, i will see the original insulation (probably mineral wool or fiberglass batts) up in the cavities.
i want to remove the old insulation and install new insulation. based on what i read, spray closed cell foam seems to be the most efficient option (R value wise as well as moisture barrier wise). however, i am concerned about the potential health risk of out-gassing due to its petroleum based nature. so, i'd like to explore other alternatives even if i have to make some compromise to the efficiency as long as it would still reasonably insulate that part of the house and keep moisture from getting into the house.
i got a quote from a contractor to spray R-38 2 lb heatlok 200 closed cell foam with 5.5" thickness for about $3000
is JM spider spray fiberglass a viable option? do you have any other recommendations that would suit my need? we are basically talking about insulating the underfloor area. i am in zone 4.
thanks,
m
my house has an extension that does not have any masonry foundation underneath, instead, the whole section sits on steel beams and columns (i suppose that's called a pier foundation?). hence, the underneath of the whole section is exposed to the exterior elements. the square footage is about 554 sq ft.
currently, there are multiple cement board panels that are attached to the underneath frame of the house through screws. i suspect that once the panels are removed, i will see the original insulation (probably mineral wool or fiberglass batts) up in the cavities.
i want to remove the old insulation and install new insulation. based on what i read, spray closed cell foam seems to be the most efficient option (R value wise as well as moisture barrier wise). however, i am concerned about the potential health risk of out-gassing due to its petroleum based nature. so, i'd like to explore other alternatives even if i have to make some compromise to the efficiency as long as it would still reasonably insulate that part of the house and keep moisture from getting into the house.
i got a quote from a contractor to spray R-38 2 lb heatlok 200 closed cell foam with 5.5" thickness for about $3000
is JM spider spray fiberglass a viable option? do you have any other recommendations that would suit my need? we are basically talking about insulating the underfloor area. i am in zone 4.
thanks,
m
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