mtbmike
New Member
hi, i have a six year old house in Mass with a 2 car garage under. The garage takes up a little more than
half the basement area. There is a boiler room and a future bathroom in the other half. Both the boiler
room and the bathroom are poured 4 inches higher than the garage floor, code here to contain spilled
gasoline, i guess. I now want to build a rec room across the back of the garage, which will abut the bathroom. I need to raise the floor to match the other room - 4 inches. I wanted to do a subfloor using 6ml poly, sleepers, and 3/4 osb.
laying pressure treated 2x4s topped by 3/4 osb only gives me a 2 1/4 inch rise (will be carpeted but i
would think pad + carpet = 1/2 inch?)
if i lay out the 2x4s on edge and top with osb, i'll be 4 1/4, which should work because i still have to
finish the bathroom floor, i plan tile, so probably 1/4 cement board and 1/4 tile would be a total of
4.5 inches above the existing garage floor.
not sure how to anchor the sleepers in this position, tho. Drill and tapcon? i was hoping to use
my ramset but i don't think they make a concrete nail long enough to do that.
i would appreciate any advise! either another way to gain the 4 inches, or the best way to anchor
the sleepers.
half the basement area. There is a boiler room and a future bathroom in the other half. Both the boiler
room and the bathroom are poured 4 inches higher than the garage floor, code here to contain spilled
gasoline, i guess. I now want to build a rec room across the back of the garage, which will abut the bathroom. I need to raise the floor to match the other room - 4 inches. I wanted to do a subfloor using 6ml poly, sleepers, and 3/4 osb.
laying pressure treated 2x4s topped by 3/4 osb only gives me a 2 1/4 inch rise (will be carpeted but i
would think pad + carpet = 1/2 inch?)
if i lay out the 2x4s on edge and top with osb, i'll be 4 1/4, which should work because i still have to
finish the bathroom floor, i plan tile, so probably 1/4 cement board and 1/4 tile would be a total of
4.5 inches above the existing garage floor.
not sure how to anchor the sleepers in this position, tho. Drill and tapcon? i was hoping to use
my ramset but i don't think they make a concrete nail long enough to do that.
i would appreciate any advise! either another way to gain the 4 inches, or the best way to anchor
the sleepers.