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You are here: Home / BUILDING Q&As

BUILDING Q&As

Best Approach to Hot-Climate Cathedral Ceiling

April 3, 2024 by buildingadvisor 1 Comment

Use of vapor diffusion port in 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

February 4, 2024 by buildingadvisor 2 Comments

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

January 21, 2024 by buildingadvisor Leave a Comment

How to install concrete pavers for a durable patio

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?

January 12, 2024 by buildingadvisor Leave a Comment

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?

June 5, 2023 by buildingadvisor Leave a Comment

IRC Type I handrails and larger Type II handrails for stairs and ramps must be easy to grasp. Type II handrails need recessed finger grips.

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?

March 19, 2023 by buildingadvisor Leave a Comment

Removed insulation shows a dry foundation wall, but decayed bottom plate, indicating leakage at footing.

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?

March 14, 2023 by buildingadvisor 2 Comments

Water entered at eaves and backed up into home 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?

How to Tile Over a Wood Deck

January 24, 2023 by buildingadvisor 5 Comments

Ditra tile membrane works as waterproofing as long as all joints and seams are properly sealed.

Q: I am redoing my wood floor balcony by sloping it, using a little dry pack  mortar and then waterproofing the surface using  Henry BlueSkin (peel-and-stick butyl membrane roof flashing). Can I apply thinset directly to the BlueSkin? I would like to use this as a waterproof barrier and cement the backer board on top of it.  Then set the tile on the backerboard. The photo … [Read more...] about How to Tile Over a Wood Deck

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Recent Posts

  • Best Approach to Hot-Climate Cathedral Ceiling
  • Frost-Protected Shallow Foundations
  • Patios & Decks for Coastal Homes
  • Can I Foam Basement Wall With Existing Studs?
  • Is Top Railing On Deck Code-Approved?

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