James L
Senior Member
- Location
- Kansas Cty, Mo, USA
- Occupation
- Electrician
Can't always take of an exact amount from a print because - especially on residential where drywall is hung horizontally - stud layout makes a difference sometimes.That should be easily-enough remedied. Take the amount of drywall off the blueprint. When they give you their rate per square foot, tell them how many square feet need to be installed, multiply the two, and tell them how much you'll pay for it.
But they usually add 10-15% for waste.
Belueve me, it's cheaper to waste it than patch in a bunch of small pieces