A question about SHGC

I understand SHGC is about blocking penetration of sunlight into an interior, and thereby reducing solar heat gain (SHG). But if a window is shaded, so that direct light is…

1979 Uninsulated Slab Home in Vermont

Hi there,We are purchasing a home by Mount Mansfield in Vermont at 1400 feet (thus cold in winter :) and it was built in 1979. I presume there was no…

Metal Sheathing pole barn workshop

I am a builder in Columbus Ohio.  On my own property I have an amish built Pole Barn workshop and office.I want to finish the interior, insulate, and heat/cool with…

many homeowners

Moisture control & insulation in New England tiny house

Hi there! First time posting here.I am converting a 10′ x 10′ shed into a tiny house in New Haven, CT and trying to figure out how to adequately control…

Meeting Energy Code Requirements

Double Air Barrier

Designing my own passive house inspired home in 4A. The kitchen and living area will have scissor trusses. I recently found and attached a roof assembly that uses a double…

what if a chimney is not used, but cannot be removed?

Hello! I am a (volunteer) trustee of a condo association. Our building is a historic school, originally built 1898. It was converted to condos in 1987. Climate zone 5A (Massachusetts).Our…

Shallow Vented Crawlspace Insulation/Encapsulation

Hello all, I'm Daniel. Here is my dilemma, I am trying to figure out a way to insulate and/or encapsulate a very shallow vented crawlspace under an older home. I'm…

Two R15 Batts in a 7.25” Space vs Compressing an 8.25” inch R30 Cathedral Batt?

What are your thoughts about using two R15 batts totaling 7 inches depth and R30 in a 7.25 inch cavity vs an R30Cathedral batt which is 8.25 inches that gets…