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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

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

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
8 Answers

Reducing energy further in Michigan home

We got a 2003 2 story home with a walk out basement. Just got a department of energy home energy score of eight out of 10 and it is predicted to use around 33,000 kwhe a year.

The home is in climate zone 5 and seems to be pretty tight ( 4.5 ach) and insulated beyond the code code at that time.

We just did all LEDs and are getting motion sensors next.

The home has a good southern and eastern pitch to get 5 to 8 kW of solar someday but I know there is more efficiency to get out of it.

Asked By Brett Little | Sep 10 16
3 Answers

Vented flat roof

I'm trying to find the best way to insulate my vented flat roof. I'm in Wisconsin, zone 6b. I've demoed my living room down to the studs. I'm planning to replace the roof in the next 5 or so years, with a non vented roof with insulation on the top of the roof decking. However, in the mean time, I'm trying to come up with a cost effective solution.

Asked By Betina Chaon | Sep 8 16
6 Answers

Unvented, sealed crawlspace under pier foundation

We're in western Montana -- cold, dry, very little humidity and rain, decent amount of snow. Bought a small house (< 700 sq. ft.) on a pier foundation. The crawlspace is raised about 40 inches above grade. The floor joists were insulated with fiberglass batts and covered with thin plywood. Unfortunately the plywood didn't cover things completely, because rodents were living in the insulation between the joists. They had all kinds of tunnels, nests, etc.

Asked By Joe Coulterson | Sep 5 16
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