On my current project, floor trusses are hung on LVL ledgers inside an ICF foundation, with the subfloor lapping over the mudsill. Thus, the mudsill really, really needs to be flat. However, it wants to take dips and dives ( perhaps from my using Simpson Titens instead of anchor bolts). I’ve planed the high spots, but have some low areas (1/16 – 1/8″), that really need to be higher, since the LVL & trusses are only 2-5/8″ away.
Any ideas on shimming those areas, on top of the mudsill & under the subfloor, that will straighten the floor without compressing too much (and not freaking out an inspector, should they discover it)?
Shingles or roll roofing? FRP panels ripped to 5-1/2″ (fiberglass reinforced plastic)? 30# felt?
Replies
Shingles. They're waterproof, rot-proof, they don't compress; they're a uniform thickness (1/8"). And they're cheap.
What more could you ask for?
Dinosaur
How now, Mighty Sauron, that thou art not brought
low by this? For thine evil pales before that which
foolish men call Justice....
Try this: drool some extra subfloor adhesive in the low spots as you are laying the plywood. Use 8d hand drive nails in those areas and drive them just enough to pull the subfloor down flat but not into the dip. Let the adhesive dry, then come back thru with the nail gun.
Or if you wish you might employ the use of some shims. There are plastic shims esientialy non compressable that are used in the fence ,stone ,glass countertop etc bussiness. they are defined near exacting in thickness and either solid flat stock ,or u shaped in varying widths and lengths. Try C.R. Lawrence....
Thanks guys - The shingles look like they'll work well on a longer stretch, and I'll try the extra glue technique on the short dips.