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The pre build thread questions....thread

post #1 of 3
Thread Starter 
Hello from West Central Iowa! Been lurking for quite some time. Just getting ready to start a multi use room build and have a couple questions before I dive into a dedicated build thread.

1) What is the minimum recommended thickness for the foam board insulation? Will be applied to cement block basement wall. I believe I read 1 1/2" was the minimum but I have read so much I'm not sure if I'm imagining that or not.

2) How much space is recommended between the foam board and the framing for the walls?


That's all I have for now. All my demo and waterproofing is complete and I will be purchasing the foam board insulation this week. I think I'll start a build thread at that time...eventually, maybe, a pile of lumber pic?

I have attached the first draft of our layout. Looking at a theater/bar setup. Any suggestions on the bar layout are welcome. I'm not sold on how it is in the attachment.


Thanks!

 

Basement Layout.pdf 79.0078125k . file
post #2 of 3
Thread Starter 
Anyone? Just looking for suggestions here. Thanks!
post #3 of 3
It depends on what code controls in your area but it's typically R10. I think XPS is generally R5 per inch but the R value is typically stamped on the board. You can supplement with batt insulation if you want or if code requires R13 in the stud bay. Foam board needs to be taped properly for a complete seal.

Check this site out. Building Science. Great information on foundation wall insulation and basements in general. IMHO code minimum is not always the best way to go but may be appropriate depending on how the space is conditioned (and budget).

I would put my framing right up to the foam board unless there are design requirements for the room that require otherwise.

I'm sure others will have input on your bar design.
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