Recent Q&A

• Bumpout Mudroom Insulating and Air Sealing

  This is new construction. I've got a small mudroom that projects off of the main building envelope. This bumpout is one story and 6' x 9' in plan. See attached…

• Large Gap Between Wall Sheathing Panels OK?

  This is new construction, the wall is sheathed with zip-r. I noticed yesterday that at two areas the framer ended up with large gaps between adjacent zip-r panels. I found…

• Can Base of Wall Flashing Trap Water

  In construction, new build, zip-r sheathing on concrete basement walls.I'm sheathed and plan on liquid flashing the base of my sheathing to the basement wall soon. We had a bit…

• Filling Gap Between Wall Sheathing and Concrete Foundation Before Liquid Flashing

  See attached sketch for clarity. I've got zip-r. I plan on liquid flashing the zip to my concrete basement wall. The way things have worked out in the field the…

• Furring strip screw recommendations

  Assembly = 2" zip R (1.5" polyiso + osb) with 1x furring strips. If I were to go for 1.5" penetration I need min of 4.25" screws, I see that…

• Ducted vs ductless minisplit cost

  I've got a design from a mechanical engineer and just starting to get pricing and it's way over what I had budgeted for. There's a single mitsubishi 30k condenser. Inside…

• 防水/设置ting elevation vs. grade

  This feels like a stupid question but just to make sure I'm not missing something obvious here.New construction, I'll have a full basement. Typical framing would sit my 12" ground…

• Basement windows in new construction

  Questions about installing basement windows in new construction, cast-in-place concrete walls. The basement will have an apartment so I can't omit windows. One window will be an egress window to…

• Developing a basement waterproofing/drainage strategy

  I'm having trouble landing on a strategy for waterproofing (or maybe dampproofing) and drainage that is affordable while not cheaping out.Relevant info:- New construction, cast-in-place concrete walls with good mat…

• Base of wall flashing

  I'm trying to develop/draw the detail at the top of my foundation wall.I see a lot of details (including in the details section here at gba, at jlc, etc) that…