Green Homes News

Retrofit: How do we tie-in existing footers and sill plate to an insulated plywood slab on grade?

Green Homes 2 - 7 hours 32 min ago
We hope to put a concrete-free floating ply floor in our slightly below grade walkout basement. Our contractors are not experienced with this floor, and we would like to provide…
Categories: Green Homes

hybrid insulation envelope for fire codes

Green Homes 2 - 14 hours 43 min ago
Climate zone 8, I would like to use 2 inch of ROXUL inside 4" closed cell spf and then 1"x6" tongue and groove board lumber in my cabin. Can anyone…
Categories: Green Homes

Light Shelves

Green Homes 2 - Sat, 2026-03-28 09:42
I've heard of commercial buildings that utilize "light shelves", either interior or exterior horizontal surfaces that direct natural light deeper into a room, and I wonder if anyone has seen…
Categories: Green Homes

Fresh-R HRV

Green Homes 2 - Sat, 2026-03-28 08:06
Has anyone tried the Fresh-R HRV units? I learned about them from Josh Salinger's comment on this Q&A Spotlight, which as far as I can see, is the only place…
Categories: Green Homes

Attic half conditioned half not

Green Homes 2 - Fri, 2026-03-27 14:02
For new build considering having a portion of the attic conditioned for hvac equipment and the rest unconditioned in an effort to save on the cost of a fully conditioned…
Categories: Green Homes

Tiny crawl space ventilation

Green Homes 2 - Fri, 2026-03-27 13:51
Help me weigh options here.Looking at a crawl space for a 20 year old small addition. It was constructed difficult to access but was recently found to be very problematic…
Categories: Green Homes

A Passive House as Proof of Concept: Wayne Turett’s Greenport Living Laboratory

Green Homes 2 - Fri, 2026-03-27 02:00
An architect sets out to build his personal home as a hands-on experiment in Passive House performance
Categories: Green Homes

Energy efficiency payback periods – any reassessment with scenarios involving much higher energy prices?

Green Homes 2 - Thu, 2026-03-26 13:02
Previously it was generally accepted in America that many energy efficiency building strategies could reduce operating costs, but generally wouldn't pay off quickly. So they have been considered more for…
Categories: Green Homes

Plenum Truss-Keepin’ the Ducts Inside

Green Homes 2 - Thu, 2026-03-26 02:00
A plenum truss is one method to keep ductwork inside the conditioned space of a home
Categories: Green Homes

Poly Foam Board and fiberglass batt

Green Homes 2 - Wed, 2026-03-25 22:43
I'm in South Louisiana building new home, 2x6 wall construction.Considering installing 2" poly foam board, then r-13 faced fiberglass batt in exterior wall. The siding I'm using is rated as…
Categories: Green Homes

Cantilevered Floor – Comfortboard Outsulation?

Green Homes 2 - Wed, 2026-03-25 20:41
I'm working to air seal & insulate a small cantilevered floor system in climate zone 4C (western WA). It's about 6'x8' and framed with 2x8s, between which is some unfaced…
Categories: Green Homes

Kebony Furfurylated wood

Green Homes 2 - Wed, 2026-03-25 20:08
One of the glossy magazines I get had a spread on a house sided with a product called "Kebony," which is a brand of furfurylated wood. You can read about…
Categories: Green Homes

Home Battery Backup Systems: An Overview of Today’s Options

Green Homes 2 - Wed, 2026-03-25 02:00
Residential battery systems are rapidly gaining popularity as homeowners look for backup power, energy savings, and resilience during outages. Here’s an overview of the different types on the market.
Categories: Green Homes

ERV port placement in kitchen

Green Homes 2 - Tue, 2026-03-24 13:29
I am retrofitting an ERV in my finished home and I need advice on where to locate exhaust air (i.e. intake) registers in my kitchen.This is an exhaust ducted system…
Categories: Green Homes

Two Proposed Bills Could Profoundly Impact U.S. Housing Markets

Green Homes 2 - Tue, 2026-03-24 02:00
A Senate-approved bipartisan housing bill and a proposal to make homebuilding materials tariff-exempt are making the rounds.
Categories: Green Homes

Length and angle of awning to block sun in summer and let it through during winter?

Green Homes 2 - Mon, 2026-03-23 16:19
I want an awning to allow sun in during the winter and block it during the summer. Is there an online calculator where I can put in my latitude and…
Categories: Green Homes

Style Over Safety Part II: More on What’s Wrong with Today’s Bathroom Design

Green Homes 2 - Mon, 2026-03-23 02:00
From toilet placement to grab bars and bidet seats, better bathroom design can improve safety, hygiene, and comfort—especially as homeowners age
Categories: Green Homes

Sealing slab cracks against radon

Green Homes 2 - Sun, 2026-03-22 13:28
My house is slab on grade, membrane underneath. We have been monitoring radon and it varies from .13 to 8.5 pCl/L, depending on whether the windows are open, cracked or…
Categories: Green Homes

How long after posting do questions become archived?

Green Homes 2 - Sun, 2026-03-22 11:43
I noticed this was a new feature of the forum, maybe to prevent spam bot posts.At what point after posting does a question become archived?
Categories: Green Homes

Vertical metal siding support over 8″ rockwool

Green Homes 2 - Sun, 2026-03-22 11:33
Hello,I am beginning construction on a new home this spring. Most of my plans are in place but I just realized that the steel board and batten siding I plan…
Categories: Green Homes

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