JM Spider vs. BIBs
WisconsinJay
| Posted in General Questions on
I see a lot of comparisons between cellulose and JM Spider but not much comparison between Spider and BIBs. Are the Spider and dense pack fiberglass essentially the same (other than application technique) or are there differences?
Building in NE Iowa (zone 6). The working plan is to use 6 inch T Studs, BIBs, plywood exterior with taped seams and Tyvek under vinyl. Inside vapor barrier either poly or INTELLO. Thoughts/ advice on the wall plan would be appreciated.
GBA Detail Library
A collection of one thousand construction details organized by climate and house part
Search and download construction details
Replies
JM Spider is a wet-blown fiberglass I believe and does not require stapling up netting before blowing. But it is also a bit messy since they cut away the excess after blowing. BIBS requires netting to hold the blown fiberglass in place. Once you install the drywall I think both would work about the same and be subject to the same settling action once the moisture on the JM system dries. But if the netting or the staples holding the netting protrude too much that could make installing flat drywall harder.