Framing Floors With I-Joists
Whether you're building a new house or remodeling an old one, engineered lumber can give you squeak-free floors with fewer callbacks.
Synopsis: I-joists offer some advantages over floor joists made from dimensional lumber, especially in long spans, but working with them requires learning a few new tricks. This primer on framing floors is good background reading for anyone who’s getting ready to order this engineered material but isn’t exactly sure how to work with it.
Most people wouldn’t think twice about spending a couple hundred dollars on a computer upgrade that might be obsolete shortly. But the same people would labor for weeks deciding whether to spend a like amount upgrading the quality of a new home by using wood I-joists instead of standard lumber for floors.
I-joists are a bit scary the first time you handle them. Short 3-ft. or 4-ft. pieces seem sturdy enough, but 30-footers flop around like al dente linguini. I-joists take a little more care to install than dimensional lumber, but when installed…