Good question. The Prescriptive Residential Wood Deck Construction Guide, recognized by all the major codes, does allow ledgers to be attached to an engineered lumber rim joist with I-joists as long as the rim (band) joist is at least 1 inch thick and made from OSB or “structural composite lumber” such as LVL. This is usually the case in modern homes, but some older homes with … [Read more...] about
BUILDING Q&As
Best Approach to Hot-Climate Cathedral Ceiling
Q: I have an unfinished space above our garage that we are converting into a flex space. It has a cathedral ceiling. We are in Houston, TX so I am concerned about the heat and humidity in the space. The west side of the space is sloping roof with soffit and gable vents along the entire length, so creating a baffle out of rigid foam is simple. We have knee walls with … [Read more...] about Best Approach to Hot-Climate Cathedral Ceiling
Frost-Protected Shallow Foundations
Q: We are building a family home in Toronto, Canada using a local builder. Due to soil conditions, we had to raise our founding level. The code requires the underside of footings to be 4 ft. below grade for frost protection. In our case with a sloping grade, the footing depth is 4 inches less than the required 4 ft in some locations. The structural engineer’s opinion is … [Read more...] about Frost-Protected Shallow Foundations
Patios & Decks for Coastal Homes
Q: A storm in January destroyed the brick patio at our beachfront property in New Hampshire. Looking for advice on environmentally appropriate, durable patio materials. Wondering if brick is the best material as it is easy to repair and if we should just fix it. -- G.M. A: Salt water (assuming you are on the ocean), is a harsh environment for most building materials. If … [Read more...] about Patios & Decks for Coastal Homes
Can I Foam Basement Wall With Existing Studs?
Q: We are looking to refinish our basement in Portland OR. Because 2x4 wood studs are already installed, we can’t install foam board tight to the poured concrete foundation. Can closed cell spray foam provide effective barrier and insulation instead? Or will thinner spots behind studs limit effectiveness? - James A: It sounds like you have some space between the studs … [Read more...] about Can I Foam Basement Wall With Existing Studs?
Is Top Railing On Deck Code-Approved?
Q: With a cable railing system, do you have to install a wood railing at the top going post to post? Or would cable only be OK? I cannot find any guidance online. I have seen it done both ways in the field, but not sure what code requires for top railings on decks. -- Baron A: The International Residential Code (IRC) distinguishes between a handrail and guardrail or “guard” … [Read more...] about Is Top Railing On Deck Code-Approved?
How To Diagnose Leakage In Finished Basement?
Q: I had some moisture in my basement this winter--got onto the carpet foam and made a mess. I removed some drywall to see if there was a leak, but the only obvious issue is wetness on the vapor barrier directly behind the drywall and dampness in the drywall as well (see photo). Any ideas how to deal with this? The foundation and fiberglass insulation appear to be … [Read more...] about How To Diagnose Leakage In Finished Basement?
Why Is Water Leaking Above Windows?
Q: During wind driven heavy rain, I get water coming in at the top of several windows. The single-story ho me is sheathed in plywood that is cover in poly sheeting. I removed the top outer trim on top of a leaking window and found no water behind the trim or on the exterior portion of the metal window frame. The water appears to be coming down the sheathing BEHIND the poly. … [Read more...] about Why Is Water Leaking Above Windows?