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0 Answers

Waterproofing slab on grade frost wall?

We are building a slab on grade addition to our house in Wisconsin, zone 6. It has a frost footing and wall which will be back- filled with sand. To match the aesthetics of the existing house, the exposed foundation will be rock faced cement block, with 4 inches of foam on the inside wall of the foundation (and 4" under slab and @ slab edges).

The WI code requires waterproofing of the frost wall. Our mason with 50 years experience doesn't think it is necessary, but the inspector does, so I'll seal it. I thought I'd use an acrylic product.

Any thoughts and recommendations?

In Building Code Questions | Asked By Edward Krause | Oct 10 13
2 Answers

I am looking for a green expert / net zero expert for my new construction home in central Iowa

Looking for a expert/guru/mentor for my new construction residential project. Build location is in between Ames and Des Moines. Goal: a healthy home, energy-efficient, self sustainable.

In General questions | Asked By Malinda Boyko | Oct 10 13
3 Answers

Adding more insulation to an attic with R-38 fiberglass

I have a 2200 SF raised ranch built in 1983, with another 1000 SF finished in the portion of the basement with 4' stem walls. The rest of the basement is unfinished. The heat is electric radiant throughout; on the main floor the heating cables are laid on top of the ceiling drywall. I've just moved in and the house was vacant for the previous two years, so I have no idea what to expect for heating bills.

In Energy efficiency and durability | Asked By Jonathan Bean | Oct 9 13
3 Answers

Provide make up air for a wood stove

Make up air

In Green building techniques | Asked By Thomas Williams | Oct 5 13
3 Answers

Concrete slab

I have a 1,000 sq ft concrete slab with copper tubing inside. Live in cold climate. To complicate matters, the interior walls are are poured concrete. I'm thinking of switching to baseboard heat with 1" rigid foam onto of the slab then plywood on top of the foam and then flooring.

Not sure if the concrete walls will be a problem with this approach ?

I would consider having the old radiant heat copper tubes tested, but I've heard that since it was built in 1950 they may not last another 50 or so years.

Any thoughts?

In Energy efficiency and durability | Asked By dan scott | Oct 10 13
5 Answers

Best approach for attic insulation?

I recently moved in to an early '70s Colonial in zone 5. The attic is poorly insulated with a couple of inches of loose-fill that looks like fiberglass.

The attic has newer AC (not heating) equipment, including an air handler and some flexible insulated duct on the floor (not suspended). It's also poorly ventilated, with 2" ventilation grilles in the soffit about every 10 feet, no ridge vent, a gable vent on one end and a small vent in the roof on the end opposite the gable vent. Finally, the asphalt shingle roof is in decent shape but approximately 17 years old.

In General questions | Asked By Andy Martin | Oct 9 13
3 Answers

Best way to insulate PEX attached to subfloor on new home?

Building new home. We are installing infloor heat in our basement (cement) and the basement will be fully finished. We are also installing floor heat for a main level (ranch home), attaching the pex to the bottom of the subfloor. Wondering what the best method for insulation (if any) is required.

We will have open web floor trusses. Basement ceilings will be fully finished. Thanks in advance

In General questions | Asked By keith schmidt | Oct 3 13
3 Answers

Everything at GBA is "Green Pro"?

Hey guys, I have no access to any story in the newletter as if it's all pro. John jnmbailey@comcast.net

In Webinar Follow-up Q&A | Asked By john bailey | Oct 9 13
1 Answer

SIP roof details

I have read a lot of what is already on GBA forums, but I could not find answers to a few questions.

I live in northern Minnesota (Zone 3 = can be very cold!) and am building my first home, SIPs over timber frame. I am preparing for a standing seam metal roof and I have three questions about roof detailing.

In Energy efficiency and durability | Asked By LynnAnne Vesper | Oct 10 13
1 Answer

Is it OK to have an unvented attic?

My attic was recently insulated with spray foam insulation, and it is now an unvented attic. Are there any concerns I should be aware of with this system? Do the benefits outweigh any potential risks? What are the pitfalls?

In General questions | Asked By adriana mcgarity | Oct 10 13
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