fixr com suloor replacement cost fixr com floor repair cost sagging 2 1 2 in x 11 7 8 in x 20 ft i joist fixr com suloor replacement cost fixr com floor repair cost sagging fixr com floor repair cost sagging fixr com floor repair cost sagging fixr com floor repair cost sagging cost to reair floor joists and suloor cost to replace floor joists 18 ft open joist oj1624 open joist engineered floor joists