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6 Answers

Window Flashing + Installation

Does this method / install look ok? More windows need to be installed and I am looking for improvements.

thanks again,

In General questions | Asked By Alexander Sanita | Jun 29 15
1 Answer

Extract current insulation before spray foam in the attic?

I am going to spray foam my attic, underside of roof, and all penetrations with open cell foam to air seal that portion of my conventially built and insulated house. My contractor is telling me I must extract the current fiberglass loose insulation now on the attic floor. While I am willing I can't fully understand the science of needing to extract the current insulation. I am being told there would be two thermal barriers and with AC ducts in the attic the would be a moisture problem.

Anyone have advice or help with the science of this decision.

In Energy efficiency and durability | Asked By David Adams | Jun 26 15
1 Answer

OTR Microwave as range hood in tight house?

I'm looking at a range hood for ventilation in a new, tight, house build. I've read the articles like:


which talk about buying a range hood with a small exhaust fan. Martin recommends 150 CFM to 250 CFM with a tight house.

In Mechanicals | Asked By Nick Hall | Jun 26 15
1 Answer

New house build & painting inquiry

Hey Guys,

Have few questions and need some help.

Here's some detail on the job in question

New build and is in the process of getting the dry wall finished (smoothed out). Inquiring about the interior walls.

Walls in the Basement are 9' high, ground floor at 9' & @ some places 10' and the second floor at 8'

Trim will include approx, 62 windows, 44 doors, the base board and two rooms with crown mold

He will also caulk the outside of the windows

He plans on doing a base coat and two color coats with sanding in between all three coats.

In General questions | Asked By beenash khan | Jun 28 15
6 Answers

I'm building a home in northern Virginia, climate zone 4

I'm building a home in northern Virginia, climate zone 4. Most of the windows are to the open south, and we plan to shade them for solar access in winter and solar screening in summer. However, it's not practical to shade some of the windows.

I plan to use high solar heat gain for the basement (and exposed concrete floor), and low solar heat gain for the second floor that will have enough heat anyway -- and probably some mixture on the first floor with the master bedroom and living areas.

In Energy efficiency and durability | Asked By Esther Streusand | Jun 26 15
5 Answers

Flush-mount exterior electrical boxes in board & batten with rigid foam and rainscreen?

Good evening all,
I'm still working thru issues involving board and batten over strapping and rigid foam. Now I'm looking into the exterior electrical boxes (for outlets and for lights).
I'd like the boxes to be flush-mounted, with the "rain screen" (do we still call it a rain screen if the strapping is horizontal?) space serving as a conduit chase. That would minimize penetrations of the insulation and WRB- while avoiding surface-mounted conduit.

In GBA Pro help | Asked By Ben Rush | Jun 25 15
3 Answers

Do I need to cover XPS in an attic?

I know codes vary from town to town but I'm looking for the general code requirement/interpretation for this. I have used R-10 2" XPS for the interior of basement walls. I know that it must be covered with drywall or another similarly accepted material for compliance and I have done so. I also have learned that the exception is between floor joists at the rim joist and have benefitted from this exception...wouldn't that be a pain of a detail! I now have to build an enclosure that had never been built for a fire box that protrudes into the attic over the garage.

In Building Code Questions | Asked By Tyrone Powell | Jun 22 15
2 Answers

R-max between drywall and insulated attic

I am interested in using 1/2 R-Max as a thermal break between drywall on the living side and blown insulation on the attic side. I have 2 x 6 ceiling joist and want to blow in r 38 of cellulose insulation. I would put foil side to the drywall and tape all intersections of boards to create vapor barrier.
Anyone ever done this .....this will allow to get some work done in the attic before the blown goes in, and in the end provide a more comfortable room below.The schematic attached is for dow board, but I think R Max will work better due to foil face. Thanks Ralph

In Energy efficiency and durability | Asked By Ralph Vickers | Jun 25 15
2 Answers

What materials to use for underground gutters?

Want advice on matrials to use to make underground gutter to keep water out of basement'

In General questions | Asked By Stanley F Gilmore | Jun 22 15
4 Answers

Exterior Foundation Insulation: How to finish


We are building a small cottage up in Maine. Our foundation wall consists of (working outwards) 2" Roxul Comfortboard insulation, 8" foundation wall, and 1 1/2" Roxul Comfortboard again. Does anyone know of any products that are compatible with region 6 climate to protect our outer layer of insulation? Originally after extensive research and calls, we figured a fiber cement board would work, but after further discussion, concluded that it's has a very short lifecyle and a poor decision.

In General questions | Asked By Sarah Payton | Jun 26 15
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