Green Homes News

Insulating basement walls with closed cell spray foam

Green Homes 2 - 1 hour 50 min ago
Any thoughts/experience insulating basement walls with 2x4s with a 1 inch gap off the wall and then 2 inches of closed cell spray foam? I was interested in the Insofast…
Categories: Green Homes

French Drain Sizing: Corrugated vs. Smooth pipe capacity and the “wedge” stone error

Green Homes 2 - 4 hours 56 min ago
I have been looking into French drain design, specifically the hydraulic capacity of different pipes and exact stone volume estimations. It seems like a lot of standard estimates calculate stone…
Categories: Green Homes

Title: Sizing gutters with SMACNA/NIST formulas vs. the standard “5-inch rule”

Green Homes 2 - 5 hours 2 min ago
I have been researching gutter sizing for a project and noticed that most basic sizing charts are just lookup tables that suggest fitting a 5-inch gutter for any roof under…
Categories: Green Homes

Rheem hybrid water heater exhaust temperature

Green Homes 2 - 12 hours 20 min ago
Does anyone know what the typical exhaust air temperature of a 65 gallon Rheem hybrid water heater should be? Our seems to have developed an issue recently where it runs…
Categories: Green Homes

Deleting gable vents when adding a ridge vent

Green Homes 2 - 13 hours 58 min ago
I'm putting a new roof on my garage and adding a vented ride cap during the process.  Is there any reason to block off my existing gable vents?  I have…
Categories: Green Homes

HVAC heating efficiency from ceiling mounted registers. Replacing oil fired baseboard heat

Green Homes 2 - 14 hours 1 min ago
The house we moved into last year had a dual zone AC only system with ceiling mounted registers. For heat and domestic hot water there’s an old oil fired furnace…
Categories: Green Homes

Can Rockwool batts be pushed up against screws and nails?

Green Homes 2 - Sat, 2026-08-29 08:37
Sorry for an obvious sounding question, but I've only worked with FG batts and can't find an authoritative answer for this when it comes to Rockwool ComfortBatts.I'm planning a new…
Categories: Green Homes

Block foundation insulation/finishing

Green Homes 2 - Fri, 2026-08-28 15:20
Hello all, Has anyone had experience with exterior above ground insulation on block foundation walls, specifically in regards to products like Genstone or Nextstone? They are in the range of r3.5-4…
Categories: Green Homes

1919 house to vent or not

Green Homes 2 - Fri, 2026-08-28 14:42
We bought this house last year. We noticed a lot of granule loss from the roof and I've been doing research about that. It is mostly on the South side.…
Categories: Green Homes

Mold Potential in Wall Assembly?

Green Homes 2 - Fri, 2026-08-28 13:57
Hello,I recently built a house from Nelson Homes with their "energy wall" but have discovered that the foam board they used is Halo Interra which is quality product but is…
Categories: Green Homes

vented gable end rafter questoin

Green Homes 2 - Fri, 2026-08-28 11:03
I am insulating my vented gable roof in my workshop. What do I do with the rafter bays at the ends? They aren't vented at the ridge, but the corresponding…
Categories: Green Homes

CMU wall waterproofing

Green Homes 2 - Fri, 2026-08-28 10:12
Im building a house with a cmu crawl space foundation wall. Because of the slop of the land and soil the foundation for the garage changes in elevation by almost…
Categories: Green Homes

Spray foam insulation

Green Homes 2 - Fri, 2026-08-28 10:02
There is a disagreement between my builder and my inspector. I have spray foam open sale insulation on underside of roof decking. The engineer is saying this space should be…
Categories: Green Homes

Bedroom addition under existing porch roof insulation advice

Green Homes 2 - Fri, 2026-08-28 09:22
Looking for some "expert" advise on how to insulate the ceiling.To start off I have a pitched "flat roof". I can't remember what I measured but it is like 1-2/12.…
Categories: Green Homes

Your IAQ Monitor Doesn’t Measure Your House

Green Homes 2 - Fri, 2026-08-28 03:34
Indoor air quality varies from room to room and hour to hour. Here's how to get more useful information from a home air-quality monitor
Categories: Green Homes

Bath Fans Can Make Indoor Humidity Worse

Green Homes 2 - Thu, 2026-08-27 02:00
A bathroom exhaust fan removes moisture after a shower—but during mild, humid weather it can also pull even more moisture into your house
Categories: Green Homes

Air sealing LV conduit

Green Homes 2 - Wed, 2026-08-26 22:40
I have a client with a newish (6 or 7 years old) custom house that seems fairly tight / generally very well built.I did an investigation today because the owner…
Categories: Green Homes

Is R2.7 enough for a thermal break for a basement cement floor

Green Homes 2 - Wed, 2026-08-26 12:24
I am looking to insulate my basement floor to provide a thermal break. There is 6 mil visqueen under the cement, but no insulation. I don't want to add more…
Categories: Green Homes

Modern “balloon framing” and thermal bridging

Green Homes 2 - Wed, 2026-08-26 11:08
Hello. Has anyone actually built a wall like this: http://blog.lamidesign.com/p/swedish-platform-framing-info.html
Categories: Green Homes

Garage conversion

Green Homes 2 - Wed, 2026-08-26 09:30
I have clients who want to convert a 23x23 garage into living space heated and cooled by minisplit. The current assembly is 2x4 walls with T1-11 on the outside —…
Categories: Green Homes

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