Green Homes News

RTU vs ducted heat pump

Green Homes 2 - 4 hours 32 min ago
Any opinions on which is better? Been seeing more RTU heat pumps being used for warehouse and events spaces with high ceilings where the unit could be installed directly above…
Categories: Green Homes

What’s the most reliable way to measure wall thickness in an older house?

Green Homes 2 - 10 hours 43 min ago
I'm renovating a 1960s home, and I'm trying to determine the exact wall thickness before ordering replacement windows and planning some built-in shelving.The walls aren't perfectly flat, and the measurements…
Categories: Green Homes

An existing garage to retrofit in a semi conditioned garage

Green Homes 2 - 11 hours 11 min ago
I have an existing detached garage with a wall that is made of 10" CMU hollow core and stucco on the outside. The garage is located in Minneapolis and my…
Categories: Green Homes

Q&A Spotlight: Spray Foam, Attics, and R-Value Equivalents

Green Homes 2 - 16 hours 19 min ago
An HVAC contractor’s equipment calculations are hampered by fuzzy spray foam info
Categories: Green Homes

Fascia board treatment to prevent rot

Green Homes 2 - Sun, 2026-06-28 21:02
I am working renovating on a my rental house after a hoarder moved out. There were obvious holes in the roof, but the cool thing was the roof was sheathed…
Categories: Green Homes

In-line bathroom exhaust in cold climate

Green Homes 2 - Sun, 2026-06-28 14:09
I was thinking about switching out my bathroom fan from under the soffit to an inline fan. Even though the soffit had been blocked around the vent there was enough…
Categories: Green Homes

Poorly vented Cape Cod attics– what will help vs make things worse?

Green Homes 2 - Sun, 2026-06-28 10:11
We have a 1951 Cape Cod in the DC area (climate zone 4A)-- the north side-attic has no formal venting (but is likely pretty leaky) while the south side appears…
Categories: Green Homes

Insulation under porch snowmelt

Green Homes 2 - Fri, 2026-06-26 20:12
I'm so grateful for the help I've received from GBA for our new house build, thank you!  We're about to have concrete poured for our front porch. We have heat-sheet…
Categories: Green Homes

Roof to wall cold strip?

Green Homes 2 - Fri, 2026-06-26 14:54
30 Years later I'm fixing up a second story 2"x4" wall from the outside. Climate Zone 6. Two layers of 1 1/2" rockwool, 1"x3" wood battens for rain screen, with…
Categories: Green Homes

window detail question

Green Homes 2 - Fri, 2026-06-26 08:59
If you look at the attached diagram, there is an inverted j-channel at the top of the window opening. This is clearly going to fill up with water and debris,…
Categories: Green Homes

material for rainscreen bug screen

Green Homes 2 - Fri, 2026-06-26 07:45
I was going to use aluminum screen to cover the gap at the bottom of the rainscreen, because it stands up better than fiberglass screen in standard use. Now I'm…
Categories: Green Homes

The Pretty Good House Blog: A Pretty Good House Built by High School Students

Green Homes 2 - Fri, 2026-06-26 02:00
Every two years, students in a rural Illinois high school build a complete home. This latest project demonstrates that high-performance construction isn't reserved for custom builders—it can also be taught in a classroom
Categories: Green Homes

Barrier Between Basement Garage and First Floor Living Space

Green Homes 2 - Thu, 2026-06-25 09:42
I am in the PNW CZ 4C where we have long wet shoulder seasons (although I'm not so sure how that might play here). I have a 1 car garage…
Categories: Green Homes

Radon Mitigation Basics for an Older Home

Green Homes 2 - Thu, 2026-06-25 02:00
After three years of radon testing, I finally installed a mitigation system. Here’s what I learned—and how well it’s working so far.
Categories: Green Homes

Cathedral Insulation Detail

Green Homes 2 - Wed, 2026-06-24 20:49
Hi all, will the assembly in the picture work without condensation issues? It will be constructed in climate zone 4a. Or should the Poly Iso be located at the ceiling…
Categories: Green Homes

Leaking window

Green Homes 2 - Wed, 2026-06-24 12:43
I am having an issue with a window (red circle) that leaks from the top during heavy rain. Could the cause of the leak be solely from the lack of…
Categories: Green Homes

Sealing the floor of water heater closet.

Green Homes 2 - Wed, 2026-06-24 10:35
Hello everyone, I am currently insulating my basement floor using a subfloor assembly consisting of 2 inches of rigid foam (XPS) topped with two layers of plywood. However, I have left…
Categories: Green Homes

Lvl for open pier and beam foundation

Green Homes 2 - Wed, 2026-06-24 07:50
I got a design 5 years ago from an engineer specifying 2 ply lvl for the open pier and beam foundation.I'm finally ready to build and can no longer reach…
Categories: Green Homes

Added ridge vent to existing house with gable vents and no soffits

Green Homes 2 - Wed, 2026-06-24 06:29
I am hopeful we can help put my aunt’s mind at ease following her recent roof installation.Her home has traditionally relied on gable venting and has performed well with that…
Categories: Green Homes

No Windows, No Problem

Green Homes 2 - Wed, 2026-06-24 02:00
Can a house with no exterior windows still feel bright, comfortable, and connected to the outdoors?
Categories: Green Homes

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