Green Homes News

Insulation for Old Flat Tile Roof with Cathedral Ceiling

Green Homes 2 - Mon, 2026-04-13 13:23
We have a 1961 Midcentury Modern home with a combination flat clay tile gable and flat roof. We just replaced the old EPDM with PVC on the flat roof and…
Categories: Green Homes

Q&A Spotlight: Timber Frame Wood Choices—What Works, What Doesn’t, and Why

Green Homes 2 - Mon, 2026-04-13 02:00
A discussion on wood species, moisture, and detailing for long-lasting outdoor timber-frame structures
Categories: Green Homes

Air gap between slab and foam insulation risky?

Green Homes 2 - Sun, 2026-04-12 20:45
I have a bath/shower room that will be built on top of a concrete slab poured between foundation stem walls. The slab will be above grade, finished to the same…
Categories: Green Homes

Insulating roof under a roof

Green Homes 2 - Sat, 2026-04-11 09:56
Hi, I am a homeowner trying to figure out how to insulate the attic and room below of part of a old 1.5 story house in Minnesota, zone 6a on…
Categories: Green Homes

Properly venting a roof assembly where soffit venting is not possible

Green Homes 2 - Fri, 2026-04-10 16:06
I have a bit of a conundrum regarding venting of my (proposed) house build.The house is a fairly straightforward rectangle, with a 6/12 gable roof. No hips, valleys or dormers.…
Categories: Green Homes

continuous exterior insulation with plywood sheathing and cement plank siding

Green Homes 2 - Fri, 2026-04-10 12:41
I have a 2x6 wall and wanted to put exterior insulation on the wall in addition to the interior batt insulation.the siding is hardie cement plank siding.Does the rigid foam…
Categories: Green Homes

Raised floor over pool/vented crawl, Warmboard + Spray foam

Green Homes 2 - Fri, 2026-04-10 12:12
Hi all, I've lurked on GBA for a while but this is my first time posing a question.I'm working with a client to convert an indoor pool room into a great…
Categories: Green Homes

Understanding the Energy Code: The IECC Section Many Jurisdictions Ignore—and Why That Matters

Green Homes 2 - Fri, 2026-04-10 02:00
Why the administrative sections of the IECC—often replaced or ignored—plays a critical role in how the code is actually applied and enforced
Categories: Green Homes

Service Cavities

Green Homes 2 - Thu, 2026-04-09 18:58
I asked this question in a comment on another article but maybe that's not the best place to ask. We have our new house built to the point where we have…
Categories: Green Homes

What materials for control layers are affected by extreme heat, e.g. wildfires?

Green Homes 2 - Thu, 2026-04-09 18:22
I was reading about designing for wildfires and it got me wondering, if radiant heat from fires can ignite houses, can sub-ignition temperatures damage control layer materials?For example, would a…
Categories: Green Homes

How long can Rockwool comfort board be exposed?

Green Homes 2 - Thu, 2026-04-09 12:33
2" Comfortboard is being installed over a self adheared WRB soon.  From contractor it sounds like it may be a while until siding is installed over it.  Should I be…
Categories: Green Homes

Source Control Comes First for Good IAQ

Green Homes 2 - Thu, 2026-04-09 02:00
Seven strategies for good indoor air quality start with the most important, source control
Categories: Green Homes

Should I try to use ERV exhaust for Heat Pump Hot Water Heater?

Green Homes 2 - Wed, 2026-04-08 14:01
I have an ERV which is exhausting somewhat warm air to outside in winter.I am thinking about adding a HPWH.  I am in a heating climate, zone 5 almost zone…
Categories: Green Homes

concrete-panel / non-foam ~ICF: (“Rasta”, “Durisol”, etc)

Green Homes 2 - Wed, 2026-04-08 12:09
I'm interested in ICF's for our ~1500sqft daylight basement foundation (Idaho @ ~5000ft, IECC zone 6). However, we're in fire country and the likelihood we'll see wildfire surrounding our home…
Categories: Green Homes

Drainage plane at cantilever w/ ComfortBoard

Green Homes 2 - Wed, 2026-04-08 10:47
Renovating a 1970's home, climate zone 5A, over 2000' in elevation on a hillside so there's extreme weather. All but one wall of the second floor is cantilevered out over…
Categories: Green Homes

Monopoly Roof Assembly with Nailbase Panels

Green Homes 2 - Wed, 2026-04-08 02:00
Monopoly framing is a great way to improve airtightness and get the insulation where it works best, on the outside
Categories: Green Homes

ERV vs. HRV – zone 7

Green Homes 2 - Tue, 2026-04-07 19:09
I'm looking for an opinion on whether I should install an ERV or an HRV. I've looked at past questions and most of them that I can find are a…
Categories: Green Homes

New Specialized Sawmill Outside Boston Taps Potential of Urban Forests

Green Homes 2 - Tue, 2026-04-07 02:00
Tridome Structures’ new TimberWise operation in Millis, Mass., is manufacturing architectural products from local lumber sources.
Categories: Green Homes

Tyvek and windows plywood boxes

Green Homes 2 - Mon, 2026-04-06 18:07
Hello.I am about to redo the exterior of the house and changing the windows.Question is , should I tyvek over the plywood boxes holding the windows or tyvek the rough…
Categories: Green Homes

Conditioned Attic with Ventilated Roof Deck (Assembly Question)

Green Homes 2 - Mon, 2026-04-06 17:59
I have a 1930s colonial home in climate zone 4A and my hvac unit is in my vented attic.  I want to have my hvac and ductwork in a conditioned…
Categories: Green Homes

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