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3 Answers

Yet another window question (YAWQ): Pella Impervia feedback?

Hello,

I'm building a house in central Oregon (zone 5). It's a mostly passive solar design, with CMU shell construction that is insulated on the outside (my builder has a patented method to attach insulation to exterior of CMU walls) and this plus a mix of tile and concrete floors means I have a huge amount of thermal mass.

So we're considering using Pella Impervia with their high SHGC "Natural Sun" glazing for five of the main south-facing 42" x 112" windows (Alpen and their better U-value is planned for the other 30+ windows).

In Green products and materials | Asked By D Wadsworth | Jan 28 15
2 Answers

Adhesive and ignition barrier for unfaced polyiso?

I got couple pallets of polyiso from an insulation recycler. It is NRG Insulation, 1.5" stuff. But it isn't foil-faced. Will be installing those in my basement with poured concrete walls.

Two questions:

1. What is the best adhesive (I can hopefully get at Home Depot or Amazon) to glue those polyiso panels to the basement wall, and how much of it do I use per panel?

2. Since it is not foil-faced polyiso, can I use FSK paper for an ignition barrier or is there another alternative, besides drywall?

Thanks!

In Green products and materials | Asked By Apollo S | Jan 28 15
28 Answers

Rheem's condensing water heaters (storage)

Hi,

My 14-year-old electric water heater is starting to look a little long in the tooth. Time to upgrade.

So, I'm looking for intel on Rheem's Professional Prestige Series: High Efficiency Condensing Power Direct Vent (RHE50) or its sister sold by Home Depot - Rheem EcoSense High Efficiency Power Direct Vent (ECORHE50).

I can't find any online reviews of either product (save one favorable review on HD's site).

For several reasons, I'm looking at a high efficiency storage water heater instead of tankless.

In Green products and materials | Asked By Michael Brahmey | Oct 11 14
2 Answers

Advice for basement wall and flooring on an uninsulated basement slab

I am insulated a basement with a very low head room and cannot add any insulation to the floor. I am insulating the exterior walls and I have a trench drain and sump on the interior perimeter of the basement. This had been installed before moving in to the house. No water has shown up in the basement in the last 4 years.

The walls are fieldstone and I intend to use spray foam and provide a dimple mat along the fieldstone wall to funnel any water into the trench at the perimeter. Not sure if this dimple mat should go up the side completely or not.

In Green building techniques | Asked By E M | Jan 22 15
7 Answers

Flooring questions

Hi guys,
I just did the flooring in the basement, and on a different forum in the midst off a question got told off for the flooring I did.

I did concrete slab, 6 mil poly, 1 inch XPS, 1/2 inch OSB.

I was planning to put floor finishings on top. However I was told that it needs to be redone or else the wood will rot.

Does what I did look that bad? Is there a way out of it short of a re-do?

Thanks

In General questions | Asked By sr kod | Jan 27 15
10 Answers

Got cellulose insulation, how to fix the interior holes?

They drilled two holes and loose filled it (i know, it should be dense packed). The holes are 2 inches wide, and plugged with styrofoam discs about 1in thick. Some are reasonably tight, some are loose. What is a good way to fix this, if i drywall compound and paint many of these will move over time. I was thinking of using a few cans of spray foam, cutting flush with a painting razor and painting. Would this work well, or do i need to sand and plaster before painting or is there a better way?

In Green building techniques | Asked By Alan B | Jan 22 15
6 Answers

Closed crawlspace ventilation choices

I'm in the process of closing my 900 sqft crawlspace and need to find a way to ventilate the space. One thought I had was to use the old oil furnace chimney/flue as a way to send the air up and out with the help of a small(20cfm) bath fan. The flue is centrally located and close to an existing outlet. Or is it better to seal the flue (or remove it all together) and duct the air through the foundation wall.
Particulars:
zone 4 asheville nc
house built in 1969
neighbor had his crawl space tested for radon and was negative.
13mil barrier sealed to block wall

In Energy efficiency and durability | Asked By terrell whitworth | Jan 23 15
6 Answers

How to insulate a block house?

i am rebuilding a small block house with a full basement in Northern Ohio. After researching the forum it seems like the consensus is to insulate the outside. My concern is that moisture in the walls from the ground or footings/slab will need to escape to the inside of the house since the rigid insulation XPS will create a vapor barrier on the outside. Any feedback or suggestions will be helpful. Jay

Buildintegral@gmail.com

In General questions | Asked By jay cooper | Jan 23 15
9 Answers

Should I install electric tankless hot water, a heat-pump water heater, or solar hot water?

So I'm in the process of specing out and finishing design on a Deep Energy Retrofit/Whole House Remodel on an old 1858 farmhouse.

House Demographics
We are in Zone 6a - NH.
PERSIST Technique is being used throughout.
R20 slab/R20 Sandwich Foundation walls/R40 above grade walls/R60 roof
We will have 9.3 kW of PV solar, and our current plans include two Solar Thermal Panels and and 80gallon Steibel-Eltron Water Heater/Storage Tank for our domestic hot water.....

In General questions | Asked By brad hardie | Jan 23 15
8 Answers

WRB - Ice & Water Shield or Grace enV spray-on (to breathe or not to breathe)?

Zone-6A building a PERSIST type home with 8" of Neopor on the exterior. Should I wrap the sheathing in Grace Ice & Water or use a spray on WRB like Grace enV. The Ice & water doesn't breathe, and the enV does. No vapor barrier on the inside and currently there are no plans to insulate in the stud cavities.

In General questions | Asked By brad hardie | Jan 26 15
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