Dec 5, 2008, 01:48 PM
I have sistered on 2 x 8's to my existing attic floor. It originally was framed with 2 x 4's and then 2 x 6's were sistered along to them. All the 2 x's are resting on the top plate. It feels sturdy enough to lay subflooring onto, but it is a twenty foot span. Will this be adequate?