Spray foam / Discussions

...spray foam or thicker rigid foam (sealed with canned foam at the edges) is the best way to prevent condensation in that specific cold spot. we share your aprehension about spray foam, but its a small amount and it certainly works. Regarding the mechanical room, an uninsulated section near an electrical board usually wo...

...spray foam contractors who propose to spray foam to onto the suspended floor and under the roof ( converting to warm attic), pouring foam in the air gaps in the walls from holes drilled in the dry lining. The foam will form an air seal envelope and insulate. They say the foam is permeable. I think spraying the suspende...

This is an old house 1860 with 1910 addition. The old wood floors have no subfloor and on first floor, that is above a dirt floor basement. Since we have access to the floor from the basement I want to put up something that will block airflow through the floor. A bit of insulation would be a plus. I think it should als...

...foam panels as they off-gas. There are better foams that don't off-gas, like EPS foam (that is often mistakenly called styrofoam, just to confuse things) and non-toxic alternatives to foam - specifically mineral wool insulation - read more here: The difference between Polyiso, EPS & XPS Foam Insulation & Styrof...

...spray foaming the concrete walls, eliminate this issue ?    mike  What you noticed points directly at what the problem is, which is the vapour barrier. When you removed it, the moisture was able to escape and be managed easily by a dehumidifier or ventilation equipment (your HRV). And then when you put the vapour barri...

...spray foam insulation has failed? It's hard to ever weigh in on a problem with complete confidence without seeing a project or knowing the full wall assembly, but if anything, that may actually show a 'success' of the spray foam rather than a failure. The wood studs will transfer far more heat than the Spray Polyuretha...

...foam with foil directly under the siding. Someone recommended removing the sheathing and doing spray foam from the outside. It seems we could also drill holes and blow spray foam in without removing the sheathing. Now that the blowing agents are more eco-friendly, are either of these a good option? How will it affect...

...spray foam what is best to apply (tyvek vs. something other) before installing the new board and batton siding? Thank you, Kurt Are you not expecting to see some sort of sheathing behind the siding? In order to spray foam properly from the outside you would need to see bare studs, and spray foam in the stud cavities. S...

...spray foam. However, if the company that makes these insulated wood studs is building them in partnership with spray foam manufacturers that have changed to safer blower agents with lower GHGs (Greenhouse Gases), that would certainly be a mark in their favour in our opinion. There are two such manufacturers we know of ...

...spray foam. That would provide a high per-inch R value, but the air tightness  an be affected as spray foam is not flexible once it sets, so if your bounce it down the highway, it may not have a very good air barrier, so you might want a separate membrane.  There are two companies we know of that have switched to more ...

...spray foam inside the assembly cavity of my walls and unvented flat roof ceiling. It's impossible to air seal all the joints and sistered joists with caulk or sealant because where the SPF meets the joints, the seam is thin and air goes right though the SPF and enters the joints.  I'm considering an additional air seal...

...Spray foam used to be about the most harmful insulation material but there has been some big changes in the industry to reduce the green house gas emissions of spray foam, so if you go that route I would pitch you the idea of choosing a spray foam with blowing agents that reduce greenhouse gas emissions. And the last p...

...spray foam insulation don't cause climate change More on spray foam:  Spray foam insulation poses a problem for removal and disposal The potential risks of spray-foam insulation Chemical off-gassing in open cell vs closed cell spray foam I would go ahead with spray foam in this case, the only thing I would suggest is...

...spray foam and why –  Is spray foam insulation a good choice for your home? Why is the removal of spray foam insulation a problem? 4th generation blowing agents for spray foam Spray-foam crisis in the UK, what can we learn from it If you need it as a vapor barrier, air barrier, or to insulate difficult areas like bas...

...spray foamed so that the "rim joist" of the roof is spray foamed as well as the under deck of the roof area. I do however have led wafer lights in the soffitting and believe that this could be causing the frost build up. However another contractor has told me that you need moisture for frost to occur and that the light...

...spray cork renders vs. fully insulating the outside of our home with rockwool or foam board and new siding. We need a cost effective solution to create a thermal and air barrier on our 1970s raised bungalow. We have a fully insulated (with spray foam) basement up to the rim joists. This space is now wonderful to live i...

...spray foam insulation in general for basement conversions and which spray foam would be best for environmental reasons to help us make a decent choice. Thanks! Insulating basements with spray foam is not uncommon, and in most cases works very well. A lot people like spray foam as an air barrier, a vapor barrier and for...