Green Homes News

Insulating Pipes Inside Insulated Walls with Two Air Barriers

Green Homes 2 - Mon, 2022-05-23 13:06
Zone 2A. I'm running PEX-A hot & cold water pipes through walls (densely) insulated with fiberglass. Should I also put pipe insulation on the pipes? This may sound silly, but…
Categories: Green Homes

Attic Temps After Closed-Cell Spray Foam Installation

Green Homes 2 - Mon, 2022-05-23 12:30
Hi all, Curious what the data nerds here would say about the results I am seeing from my attic ceiling insulation. This is CZ 5a, an attic with air handler/ductwork…
Categories: Green Homes

Ledger-Hung Floor System

Green Homes 2 - Mon, 2022-05-23 12:00
A method for keeping the first floor close to grade
Categories: Green Homes

Installing Metal Skirt on Barn

Green Homes 2 - Mon, 2022-05-23 10:53
So I've moved on to our barn project from our house.  I have a diagram and photo below of the project and my question.  We live in zone 5C where…
Categories: Green Homes

Retrofitting an Attic

Green Homes 2 - Mon, 2022-05-23 08:26
Hello. Long-time reader, first time posting! We bought a 1993-built house in Fayetteville, AR (Zone 4a, also ~1500ft elevation if that matters). It has a very steep gable roof with…
Categories: Green Homes

advice for termite shield retrofit on rubble foundation?

Green Homes 2 - Mon, 2022-05-23 04:49
We're replacing major sections of sill, on a rubble/fieldstone foundation. Any advice regarding how to add a termite shield? (hello Southern builders!)  Any concerns about tearing of the metal, on…
Categories: Green Homes

Choosing the Right Air Barrier

Green Homes 2 - Mon, 2022-05-23 02:00
A self-adhering membrane is 10 times the price of conventional housewrap. Is it worth the extra cost?
Categories: Green Homes

HVAC refrigerants, phaseouts, and replacing AC and heat pumps

Green Homes 2 - Sun, 2022-05-22 19:49
R-22/Freon has been phased out (Jan 2020).  R-410A/Puron is also on the way out, with other refrigerants coming to the market in 2023 (R-454b in Jan 2023?) Questions: 1.     If R-454b is slightly flammable,…
Categories: Green Homes

Atypical HRV supply integration with HVAC

Green Homes 2 - Sun, 2022-05-22 17:50
Climate zone 5B, new construction build in process, with dedicated and balanced ventilation. I am contemplating the location and termination of the HRV interior supplies and exhaust intakes. For various…
Categories: Green Homes

Best Floor / Wall Assembly for Basement to Manage Moisture

Green Homes 2 - Sun, 2022-05-22 11:03
Hi all, I'm planning to finish my basement and am researching options for the floor and wall assembly to best manage any potential moisture issues. Some relevant info: • House age: Late 1970s•…
Categories: Green Homes

windows in unconditioned attic

Green Homes 2 - Sun, 2022-05-22 09:02
My gable-roofed, unconditioned attic has lots of cellulose insulation and a single-pane window at either gable.  The windows are extremely old and drafty - but does that matter in an…
Categories: Green Homes

For heat pump water heater specifications which mode(s) are the listed values for?

Green Homes 2 - Sat, 2022-05-21 19:48
When a water heater specification says that, e.g., the UEF is 3.39 and the recovery rate is 21 GPH, which mode(s) are those for? Are they both for the default…
Categories: Green Homes

I have HVAC. Should I go ductless?

Green Homes 2 - Sat, 2022-05-21 13:29
I recently bought a two-level 2500 sf house. It has a single HVAC - no zoning. My mom moved in with us and wants it hot. We have all the…
Categories: Green Homes

Code confusion on utility/mechanical room

Green Homes 2 - Sat, 2022-05-21 11:26
I am trying to find information in the 2015 building code that specifies the rules for utility/mechanical rooms. I am specifically looking for info on:1. Type and thickness of drywall2.…
Categories: Green Homes

Vapor barrier over 1920’s garage slab

Green Homes 2 - Sat, 2022-05-21 10:49
I have a client that wants to turn an unused garage on the 1925 house into a workshop area that is insulated and conditioned with a mini-split. I'm looking for recommendations…
Categories: Green Homes

Indoor air quality sensors in the $200-1,000 range for UFP, PM1.0, PM2.5, PM10, Radon, TVOC, CO, CO2, ozone, NOx, etc? Any good overview sites?

Green Homes 2 - Fri, 2022-05-20 16:52
Does anyone here have experience with indoor air quality sensors in the $200-1,000 range for UFP, PM1.0, PM2.5, PM10, Radon, TVOC, CO, CO2, ozone, NOx? Are there any other metrics…
Categories: Green Homes

Navigating unvented roof assemblies and building code

Green Homes 2 - Fri, 2022-05-20 15:50
Hi everyone,I’m looking to build a home in Chilliwack British Columbia Canada, not far from Vancouver. We’re lousy with rain and moisture and research documented here and elsewhere has shown…
Categories: Green Homes

The Role of Sustainability and Climate Resilience in Healthcare

Green Homes - Fri, 2022-05-20 11:00
Location: Zoom

Join the Harvard Medical School Students for Environmental Awareness in Medicine for a panel discussion on healthcare sustainability.... Read more about The Role of Sustainability and Climate Resilience in Healthcare

Categories: Green Homes

Innovation, Investment and Policy in Regenerative Agriculture

Green Homes - Fri, 2022-05-20 11:00
Location: Zoom

Join the Technology and Public Purpose Project and the Environment and Natural Resources Program for a virtual conference featuring Ashlie Burkart, Chief Scientific Officer at Germin8 Ventures and Non-Resident Fellow, Technology and Public Purpose Project, who will lead sessions with practitioners, private, civil and policy to discuss goals, policies and opportunities for more rapid adoption of soil health/carbon farming (“regenerative agriculture”) practices.... Read more about Innovation, Investment and Policy in Regenerative Agriculture

Categories: Green Homes

Evaporative sealants

Green Homes 2 - Fri, 2022-05-20 10:31
When an evaporative curing sealant I believe is what it’s called, dap extreme stretch (not a chemically curing sealant) is closed up but not sandwiched between two impervious surfaces, will…
Categories: Green Homes

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