How to properly insulate basement walls?

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Posted by: from Brampton
2/9/2016 at 9:28:47 PM

I plan on finishing my parents basement and after research I cant seem to decide on how to insulate it, everything seems to work for someone but doesnt work someone else if you know what im trying to say.

The house is about 4 years old only and has builder's wrapped insulation again for someone it's fine to build over it but others say no. I came to a conclusion I'd rather tear it down and do it myself for peace of mind.

I don't plan on spray foam so if I foam board on concrete wall, steel stud frame right against foam board, insulation between studs and proper vapor barrier a good way to do it and meet the "building code". ???

I want to do it right and not have any problems in the future with mold. Please help.

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Date/Time2/10/2016 at 7:37:01 AM

Insulation that You have from the builder is R12 requirement by the building code is R24, meaning you have to use 2"x 6"studs. Spray foam is questionable, rumors are if in enclosed area it produces gasses which are cancerous. I wrote to a manufacturer of this material and raised this question. I never received answer. I will never use spray foam for my clients.

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Brandon in Brampton
Date/Time2/10/2016 at 9:33:40 AM

Yeah I'm definitely not gonna use spray foam. I just want to know if the way I described above is okay and the proper way to do it.

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Jesse from Arctic Attics in London
Date/Time2/10/2016 at 4:36:36 PM

Everything you are doing is great, remember to insulate the headers as well. By you adding the foam you are stopping thermal bridging, (the transfer of heat/cold threw the studs)I know you said you didn't want spray foam however if you left a gap between you studs and concrete it may be easier and cheaper to have it sprayed and achieve the same thing. The gap is for thermal bridging so you can spray behind the studs.

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Date/Time2/11/2016 at 5:16:18 PM

If you glue your r-10 or r-15 blue board directly to the foundation walls. Then use tuck tape on every edge. You have started your insulation and already created the vapor barrier.

Now install your studs and add an r-15 insulation after your electrical work and venting is complete. Then simply screw up the drywall and mud.

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Date/Time2/11/2016 at 5:20:47 PM

Thank God, this is my competition.

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Date/Time3/27/2016 at 1:34:22 PM

Some contractors should do some research on the blue board insulation. sealing it and adding it to normal insulation is the most effective way to have a vapor barrier as well as have decent insulation. You are not limited to R-15 in the studs. One can waste square footage in the basement and use 2x6 and go with R-25. Waste on money though!

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