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5 Answers

Attic ventilation needed for a 100-year-old slate roof in a coldish climate?

Hi all,

First time owners looking at 100 year old house in NE US (climate zone 7).

Beautiful slate roof, very steep (making the attic much smaller than 1300 sq foot footprint of house).

Attic is totally not vented.

Inspector said to look into venting it to help roof last longer.

My question is, it’s lasted this long (I’m sure it’s had repairs along the way) is it safer to leave as is or look into venting?

In Energy efficiency and durability | Asked By slateandall | May 21 18
3 Answers

Spray foam from crawlspace onto bottom of plank subfloor in Pacific NW?

Hi there - I'm in a 1955 house in Seattle, WA, over a vented, unconditioned crawlspace, with hardwood flooring on top of plank subfloor with no insulation under it.

In Energy efficiency and durability | Asked By Frasca | May 21 18
4 Answers

Debating cavity insulation

I'm starting a house build in New Brunswick (Climate Zone 6A). My planned assembly has 3" of EPS foam on the exterior (3" Silverboard XS). I've already bought the Silverboard, so there's no going back now.

To please the local code officials, I will be installing Membrain on the interior.

In Energy efficiency and durability | Asked By Chris Burpee | May 18 18
7 Answers

Exterior Insulation on Cinder Block Walls

I have been through many articles talking about exterior insulation techniques, and insulating the exterior of foundations. My house is a little unique, and I'm hoping that someone can offer some insights/guidelines on how to handle things.

In Green building techniques | Asked By Jameson Taylor | May 18 18
38 Answers

Please critique my floor plans (first draft)

This house build is in rural Southwestern New Hampshire. 1500sq ft ish. 2 story, 2 bedroom, no basement. Site is south-facing Hillside. House will be on the north edge of a 2 acre clearing. Site has really good exposure for PV panels.

Details:
Shooting for Net Zero with PV Solar array on garage (11kw ish)
Double stud wall construction
ZIP system sheathing
Very tight air sealing details (with a blower door test)
variable permeance interior vapor retarder--- Pro Clima Intello Plus
R20 floor, R40 wall, R60 ceiling
dense pack cellulose insulation (walls, roof)

In Plans Review | Asked By Tech1234 | May 17 18
2 Answers

Spray foam questions

Hello all, thanks for any help in advanced.

In General questions | Asked By Stanger133 | May 20 18
2 Answers

Comfortbatt/Rockwool/Roxul and temporary compressibility

I have some framers coming tomorrow and have a basement wall being constructed inside the existing wall so as to insulate inside the stem wall. I'm planning on using rockwool comfortbatt at the bottom of the wall to allow for some breathability of the stem wall.

Will I be able to squeeze the 5.5" comfortbatt through a 3-3.5" wide opening (it will expand to full size, once in the wall)?

It hard to tell if it can compress that much, even intermittently, though I'm guessing so.

In Green products and materials | Asked By rossn1 | May 20 18
8 Answers

Water cooled refrigerator coils

This may seem weird, but I’m curious...

We just bought acreage in west central Florida and we’re planning our home. We plan on making everything as energy efficient as we possibly can, and I ve been researching geothermal ground loop heat pumps.

As I’m grabbing some leftovers out of the fridge, I feel hot air being blown on my feet from the condenser coils underneath. At the same time I hear the AC kick on outside. The lightbulb flickers on above my head... I’m running the AC to cool the room that is being warmed by the fridge...

In Mechanicals | Asked By LT.Son | May 19 18
2 Answers

Over my head

I'm new to this forum, so I hope this is an appropriate question. I'm at the planning stage for a gut rehab of a ~2500 sq ft home in Boston, MA (which I think is zone 5). We're going to be completely rebuilding the envelope and replacing all the systems. We will have 14kW of solar on the roof.

In Mechanicals | Asked By Bradslees | May 19 18
1 Answer

Does the roof sheathing side in the attic space have to be insulated?

in some rooms in the upper levels there is attic space with an access door. I realize that the walls which are against the liveable space have to be insulated, but does the side with the roof sheathing have to be insulated? This is the side where the roof shingles are attached.

In Building Code Questions | Asked By C D | May 19 18
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