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5 Answers

Insulating underneath wood shingles underneath asphalt shingles

Hello!

I've done my research and read quite a few relevant posts and articles here, but I couldn't find an exact match for my situation.

Legend has it that my home was built in 1876 in Philadelphia and moved here to Harrisburg via barge sometime after that. I'm in Climate Zone 5.

My wife and I are looking to build an insulated cathedral ceiling. Yes, I've read the wonderful GBA article :)

Asked By Drew Buglione | Sep 20 16
6 Answers

Insulating a cathedral ceiling with self-adhesive roofing membrane installed

We are building a 640 sq ft cabin in CZ6. At the last minute we found a metal roof rated for down to a 1:12 pitch and made the change to a 2:12 pitch.

With that change to a flatter pitch came a recommendation from the roofing supplier to cover the roof sheathing with a self adhesive "Ice and Water Shield" type product.

So our roof (all complete) from outside to in:

24 gauge metal roof.

Asked By Chris Harper | Sep 22 16
7 Answers

Flat roof assembly question

I am replacing the roof on a brick masonry building in NYC within the 5 borough. The building was built in 1910/11. It is a flat roof, about 40 ft long and 25ft. wide. The previous roof (a tar and gravel system) failed and my brother and I removed it, and replaced the damaged roof deck. (a mixture of plywood replaced probably 30-40 yrs ago, and the original t&g boards) with 3/4 OSB. Toward the front 10 foot or so of the building the t&g boards were dry and strong so we left them in place. A little bit of repair to the cornice "box" was necessary.

Asked By Jacob Turetsky | Sep 22 16
3 Answers

Should I consider Structured Plumbing in 4500 sq. ft. house?

Hello and thank you for looking at my question. I hope someone can explain this to me in laymen's terms.

Asked By Cherylann Schieber | Sep 19 16
5 Answers

Balancing HRV-- custom design

So I built in my own HRV and retrofitted it into the house.

I notice most of the literature says I need to sample the mean air speed in a straight section of duct not near a bend or a change in air speed (silencer). I did a combo of the Zehnder tubes and a Fantech HRV. So I have done a few custom things that do not facilitate balancing the system in a standard way.

Asked By frank castle | Sep 18 16
10 Answers

Exterior (north) stone wall

Hello-
Indianapolis Zone 5a
My own outside weather station reads mid 70% humidity July through October which is 10% higher than Indianapolis historic values.

House is ranch style one story slab on grade. South facing wall is stone on the outside. The wall construction is as follows from outside to inside:
stone (avg 3 inches) - no noticeable air gap or weep holes.
sheathing - not plywood or OSB-- looks like particle board with black facing the inside.
fiberglass batt - removed
3 mil plastic - removed
drywall - removed.

Asked By Edward Kramer | Sep 13 16
4 Answers

Insulation below rat slab

Given the usual requirement to put insulation beneath a concrete basement floor, why isn't it useful to place underneath a rat slab (2 inch concrete slab) in a crawlspace? Is it a matter of payback?

thanks, Sacie

Asked By Sacie Lambertson | Sep 19 16
10 Answers

Strapping for dense-packed cellulose

Looking for recommendations on the correct strapping spacing (12" or 16") to help prevent bulging with a dense pack cellulose installation on walls. We will be using Insulweb over 8" cavities, 16" on center framing.

Asked By Jessie Pratt | Feb 25 14
5 Answers

Permeance and latex paint

Martin et al.,

I have a question for a "Pro" on this blog. I am looking into different encapsulants or paints to go over lead paint in an older home remodel. The permeance for these latex based encapsulants varies widely.

Asked By Michael Enos | Sep 19 16
2 Answers

Attic venting

HI-
Indianapolis Zone 5a
My own outside weather station reads mid 70% humidity July through October which is 10% higher than Indianapolis historic values.

single story. baffle vents with roll on ridge vent.

Attic is very very hot and musty. Lots of pressure build-up in summer that presses down into the house bringing allergens with it. Some ice dams in places without baffle vents.

Given the hot/humid summers and colder winters, do i leave the attic ventilation alone?

Asked By Edward Kramer | Sep 13 16
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