Evaluating HVAC Filters – GreenBuildingAdvisor
My fairly tight house was set up so that when the kitchen exhaust hood is turned on, a damper opens and lets in unfiltered, unconditioned ouside air. The interior grill where the outside air enters the house was getting quite dirty, so I replaced the grill with a 2″ filter grill and installed a cheap […]
Yes, you can seal around the exterior of the box with canned foam or regular caulk. My preference is to use the red silicone high-temperature caulk to seal holes in boxes though. You want to keep any of these materials outside of the box as much as possible. You don’t need fireblock caulk here, you […]
Replies Expert Member MALCOLM TAYLOR | Oct 27, 2025 12:30pm | #1 coward13, The roof cavities still have some drying ability through adsorption and redistribution of moisture through each framing member, but yes, it’s safer to use permeable baffles. That can be a variety of materials like house-wrap, plywood, fiberboard, or even some foams like […]
Interior-side polyiso was often done in my area in the 1980s for higher-performing homes. There’s nothing wrong or risky about it, in a cold climate. One downside is that it doesn’t address thermal bridging where interior wall partitions meet exterior walls, which were traditionally filled with framing lumber. In my area, I often see mold […]
Infrastructure under strain – what the AWS and VDF outages mean for Industry 4.0 RCR Wireless
I’m currently designing a proposal for a home in Portland, Maine (Climate Zone 6). The window detail uses Corten steel as the exterior material, which provides an overhang for summer shading while also functioning as flashing. It’s attached directly to the sheathing so that it aligns with the wooden sill. My design intent is to […]