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5 Answers

Slow rise foam or dense pack cellulose in roof slope?

Cape Cod style house– i.e., under roof is kneewall, slope, and small collar attic above the flat bedroom ceilings

1925 house in Washington DC area with slate roof on front side of house, asphalt shingles in back. Roof deck is boards, not plywood or OSB. Currently there is a small amount of cellulose on “attic” floor and some poorly installed fiberglass batts on some areas of roof deck in kneewalls.

Asked By elizabeth hilder | May 17 15
7 Answers

New high-rise condos

I read about a large scale high-rise condos being built in downtown Phoenix. What I was surprised at was there is nothing mentioned about energy efficiency. We are talking Arizona and no solar panels are being used to offset the electricity. There is no LEED certification being sought. Nothing about how energy efficient the building will or will not be.

http://www.portlandparkcondos.com/team/

Asked By Peter L | May 24 15
6 Answers

Loud popping in ceiling or attic since newer insulation and roof

We live in the northwest. In the winter there is no noise. As soon as it starts to warm up there are very loud popping noises that sound like they are coming from the attic or ceiling. Wondering about heat in the attic. Workers said there is a lot of insulation - not sure what kind.

Any ideas what to investigate?

Asked By M Miles | May 20 15
3 Answers

Passive solar orientation and shade-free zone

Friends,

I am writing to double-check my thinking on our passive solar building orientation and a shade free zone.

Next week a surveyor will stake out the building layout for our 1,100 sq foot passive solar home at 46 degrees N in Minnesota.

The structure's southerly, solar-gain wall will be oriented at 210 degrees (30 degrees W of true south). Solar studies I have done show that we will get good sun light penetration into the structure during the winter with this orientation.

Asked By Randy Bunney | May 13 15
16 Answers

Is there a standard factor General Contractors use when calculating their fee to construct

I am in discussion with a builder to construct my new home in zone 4B. We have engaged the services of an energy modeler to determine how to build the most efficient house within the budget. We are grossly over budget, at the moment. I noted that the GC has build a 16% fee into the budget to build the house. This is on top of all the subs and the contigency. Not wanting to negotiate something I have no background on, I'm wondering if this is a negotiated fee or is there some standard? I understand my builder needs to make a profit but I would love to get 16% return on my investments!

Asked By scott schroeder | May 22 15
3 Answers

Is there an energy efficiency penalty for an oversized dehumidifier?

If i buy one that is oversized for my basement it will presumably run fewer hours a day at higher wattage, is there any penalty or lower effectiveness on this?
The one i am considering is 1.85L/kWh energy star rated compared to another 1.85L/kWh unit.

Asked By Alan B | May 22 15
1 Answer

Perlite in wall cavity recommendations.

I have a 2x4 wall cavity that is only about 5" wide. The cavity contains a steam pipe which is uninsulated. The cavity is obscured by another wall that makes access to it very difficult.

I would like to fill the cavity with perlite to insulate the steam pipe. I can close up the wall to prevent the perlite from leaking out, and have access to the top.

The house was built in 1928. From the outside: brick, air gap, roofing felt, 3/4" tongue and groove.

Asked By Kurt Kiley | May 25 15
8 Answers

Critique for gut-job re-do — insulation

Hi,

Asked By Brian Greul | May 11 15
2 Answers

Pan heater on Mitsubishi minisplit?

Hi

I have installed MSZ-FH09NA/MUZ-FH09NA. The supply house told me these units do not come with pan heater which should be used in cold climates like NH. However, my unit is raised 16 inches of the ground and it's located under our porch and it's protected from snow.

Do I still need to install these pan heaters or I can go without them?

Thanks

Asked By Alex Frost | May 24 15
1 Answer

Adding a porch to a TJI Klingenberg wall

I'm trying to detail adding a porch with roof to a wall with 9 1/2" TJIs (full of cellulose) outside the 2x4 structural wall. The Tji's are not structural but I hesitate to bring the structure through the insulation layer to lag into the 2x4 wall. The loads are not huge but include snow load. The porch is only 7' deep. any suggestions?

Asked By Robert Swinburne | May 24 15
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