Sean,
While I cannot help you with your question regarding the magboard (I built mine with the "dreaded" OSB), here are few things I missed.
*Measure twice, cut once for your openinings. It is pain in the neck once you buck out the window and it is slightly too small. I know stooopid on my part.
*If you are using extension jambs, make sure they are long enough. I went with standard extension jambs on my windows. Well "standard" for a 2 x 6 frame is 1/2" smaller than the SIP (at least for mine 6.5"). Anyway, I had to rip and cut 1/2" extensions for my extensions (Clearly I am not a professional, duh!). Turned out fine but a lot of extra work.
*Finally, how is the 'echo' or sound travel through the wall? I ask as my SIPs (OSB w/EPS) have a hollow sound and sound travels pretty easily through it. Unfortunately, I didn't see the fixes for this until after I was done (again, duh). Anyway, there are (2) ways I have read about in case you want to know. Some on here advocated furring out a wall inside, thus creating a dead space that will eat up the sound. Another way I have read is using a product called 'Acoustiblock' (sp?). It looks like a roll of thin (1/4") rubber that goes on the inside/outside of the SIP. It is also designed to go in between floor truss/joist and the sub-floor. It is not cheap and I cannot speak to its effectiveness but I would have tried this way had I known about it.
Your build looks great. Happy building! |