- Q. Posted by
An old drywaller gave me this formula for estimating
the number of 4x12 sheets needed on a job: Take your
floor square footage, multiply by 3.5, then divide that
by 48. Anyone tried this? How accurate is it? Any other
My rocker uses 3.7 per sq. ft., but buys a
variety of sizes to minimize waste.
Posted by Alan:
If your man can hang at that ratio, he must be
buying the rock himself. I use 4-4.5 per sq. ft.,
to get a quick and dirty budget number, but in my
region (D.C. area), hangers are often
piece-workers. I have seen crews doing a simple
two-bedroom apartment have an immense pile of scrap
left over (they very likely cut up whole sheets
just to get paid for hanging them). But
I’ve also seen crews hang a chopped up
attic addition, with vaulted ceilings, and have no
more scrap left over than you could haul out in a
single trash can.
Posted by Mike:
The 4-4.5 formula works for me also, but
I’m always thinking about how to use even
larger sheets to be more efficient.