Rigid insulation / Discussions

...insulation. This allowed for cold air to come in easily and for a major bug infestation. We are re-doing the outside insulation. We will put soft rockwool (batten) right against the wood beams on the outside. Then an air barrier- WRB (as sealed as possible), then another layer of continuous rockwool board, followed by ...

...insulation panels, which may or may not be recyled but they are made from a renewable resource, but they also may contain plastics so check manufaturers specs. This page here is likely a good read for you about different rigid insulation options :  All about Rigid insulation panels : which ones to use for which applica...

...insulation is Graphite polystyrene insulation, and it does offer a bit higher R value. We don't have a page specifically on GPS foam but you can use it anywhere you would use EPS rigid foam insulation. EPS is typically rated at abou R4 per inch where GPS is typically rated as having R5 insulating value. Here is our pag...

...insulation to install.  And to be sure I understand, it sounds like your preferred finish is to leave the rafters and bays between them open as the interior finish, which would mean insulating the outside. If that is the case, yes you can, you would want to insulate it the way you would exterior walls, and then install...

...insulation aspect of finishing our basement correct, but I'm still not sure. The two different kinds of foam boards I've been looking at are, Kingspan Insulation R-10 2in*4ft*8ft unfaced polystyrene foam board from Lowes and the Foamular 150 2in*4ft*8ft R-10 unfaced squared edge insulation sheathing from Home Depot. Ar...

I framed my basement, however I wasn't going to insulate my basement because I have a wood stove, and it stays pretty warm. But I feel for summer I want to have some insulation to keep it cool. Can I put foam board in between my studs and tac nail it? You could put foam between the studs, but why not batts? Were you ch...

...insulation in the wall cavity. The foil based rigid foam panels may be EPS, but they also may be polyisocyanurate insulation. Do you know which they are? This page here can help you identify them as well as learn the characteristics and best uses. Choosing the right Rigid foam insulation panels And to answer your quest...

...rigid foam panel to the exterior would likely cause that trapping of moisture you are already aware of as foam will act as a vapor barrier. First here is our page about how to insulate the exterior or walls. I think a safer bet for you would be using something like mineral wool rigid insulation panels.   

...insulation companies have usggested we should remove the fibreglass insulation and replace it with spray foam insulation and then apply the vapour barrier and dry wall. We are unsure as to how to proceed. Please advise.  That isn't a big surprise since MDF is a heavily processed wood product very susceptible to moistur...

...rigid foam insulation. The most important thing to remember is that basement walls can’t dry to the outside the way above grade walls can, so you need to sure not to trap moisture inside the walls where the wood and insulation is. Meaning, the last thing you should do in a basement is put a 6-mil poly vapor barrier aft...

We live in Bellingham WA and our basement was built in the 70's. It has high humidity (70-80%RH) although I don't see any visible damp anywhere. The washer/dryer are down there - the dryer vent is fully sealed, there is no actual ventilation in the basement apart from the drafts. There is a sink, the hot water tank wit...

...insulation, I'm guessing no exterior sealing. But dry dry dry inside.  I like the idea of the 2" XPS with 4" studs and roxul insulation to give around r24 (local code). This is expensive and I'm not 100% on board because the basement is half above grade. I have seen in the CMHC book a scenario where a vapour barrier s...

...rigid foam to Install two inches of rigid insulation board directly against concrete.  A mold expert told me to put the board on top of the framing, not directly onto the concrete wall so the house can breath.  What is the right course of action? Thank you Can you please explain a bit better what the mold expert told y...

...insulation. Alternatively you could use loose blown cellulose insulation.  As for  your question about sealing it, that is a very wise idea. You could have a blower test performed to see how leaky the house is, that can also help you pinpoint any breaches in your air barrier so you can find and fix them.  That list of ...

...rigid insulation panels -  The difference between Polyiso, EPS & XPS Foam Insulation & Styrofoam We always choose (and recommend) EPS over XPS due to the fact that XPS has much higher greenhouse gas emissions than EPS.  So if you are looking for suggestions we would say go for the EPS, and if you want added pro...

...rigid and 5 1/2" between the studs.  why not use 8" semi rigid, 3 1/2" between the studs and 2 " more semi rigid on the inside beneath the gyprock?  Is that possible? Hi Tom, 2x4s can be used for homes no problem, but it definitely fattens up the posts required between windows. The sections of wall between the south-fa...

...rigid insulation on the exterior of a 2x6 wall, so we installed a plywood extension to allow the window to sit solidly, partly over the exterior board insulation. Our exterior air barrier membrane comes up into the rough opening, we then put Rockwool insulation between the frame and rough opening and finally taped the ...

...rigid insulation boards, but be sure to get the right ones, so be sure to read this page first -  The difference between Polyiso, EPS & XPS Foam Insulation & Styrofoam There are rigid insulation boards that will act as the insulation only, insulation and air barrier only, or all in one - insulation, air barrier...