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7 Answers

Insulation for vehicles - if not Reflectix, then what?

Much thanks to everyone here for the great comments on Reflectix on the other Q&As. I'm glad I read them before I bought any!

But now I am stumped. This is one of the main recommendations on the RV-builder forums for insulating a vehicle to avoid condensation and keep warm/cool.

I am preparing a Chevy Express cargo van for research work (using it as office/sleeping area). It has a steel skin, and hollow steel "studs" spaced about 2 feet apart, about 3" deep between. Ceiling is similar. Also, there are voids in those "studs" and in the door recesses. (http://bit.ly/HRnArM for a pic).

In Green products and materials | Asked By Dylan Gordon | Apr 17 12
4 Answers

Insulating and sealing off the underside of pier built structures?

I am planning a kitchen addition to be built on concrete piers....to eliminate the cost and effort of perimeter footings and crawl space walls. The floor would be built using I-joists and I would install (2) layers of 2" rigid foam down into the joist bays so that the panels sit on the lip of the I-joist flange. I would also seal the panels with spray foam around their entire perimeter within each joist bay. Is this insulation concept acceptable? Does some other material/barrier need to be installed on the bottom of the joists to keep out pests or animals and/or moisture?

In Energy efficiency and durability | Asked By JONATHAN SCHOLL | Apr 18 12
3 Answers

Foam board insulation install

I am not in the building trades so I am seeking some help and advice from the pros.

I contracted to have new vinyl siding applied to my existing home in the Detroit area which included foam board insulation underneath. The crew removed the old aluminum siding and the trim caps around the existing vinyl windows. They applied 3/4in. foam board to the work area and siding channels around the effected windows and corners. This was followed by the new vinyl siding and aluminum trim and gutters.

In General questions | Asked By Zeno Potas | Apr 18 12
4 Answers

Summer seasonal home construction and codes


In GBA Pro help | Asked By Leslie Guerci | Apr 17 12
1 Answer

What is the total percent of heat loss by conduction?

In relation to convection, radiation.

In PassivHaus | Asked By Lorene Walvatne | Apr 22 12
15 Answers

How to build a cathedral ceiling

I just read how to build a cathedral ceiling and the voluminous responses.
I am a homeowner. We are about to have a shed dormer built with minimal roof slope and ceiling height.

I plan to push for the GBA detail for cathedral ceiling with emphasis on air sealing 6 sides of the f/g insulation.
Do I understand that the accuvent also must be caulked or sealed?

In GBA Pro help | Asked By Dave Nicholson | Mar 29 12
1 Answer

Insulated fire rated garage man door?

Does anyone have a source for a good insulated 20 min rated door (for garage access from a residence)?

In Green products and materials | Asked By Erik Lobeck | Apr 20 12
2 Answers

Brick veneer cladding and exterior rigid foam

Exterior wall cladding on a house that we're looking to build is primarily fiber cement with a 42" brick water table at the base. Wall construction from the framing out is 2x6 with OSB sheathing, 2" of XPS rigid foam and house wrap. Upper portion under the fiber cement will include 1x3 vertical furring to provide for ventilation and a way to secure the fiber cement. Lower portion by the brick will incorporate a 1" air gap and a mesh material at the base to prevent mortar droppings from blocking any weep holes. Question is what is the best method to secure the bricks to the studs ...

In Green building techniques | Asked By Milan Jurich | Apr 19 12
7 Answers

Monolithic slab in a cold climate

I've been talking to an excavator who says that he has done quite a few monolithic slabs up here in Vermont, including one for his own home. I'm wondering if anyone else has used a monolithic slab in a cold climate and if so, how did they do it? I'm thinking that 4" of foam insulation under the slab and another 4" around the slab would work, but I wonder how far out it should go. I also wonder about what kind of vertical insulation to use around the slab perimeter. Any advice?

In Green building techniques | Asked By William Ritke-Jones | Apr 5 12
0 Answers

Water Filter recommendation

This may not be a green building question, but it's related to Green. I am looking for built-in water filter that can remove as much bad stuff such as chlorine, heavy metals, such as barium, cadmium, chromium, lead and mercury. I am looking for the model that I can install at the sink without having to use a water pitcher like Brita. I am also considering whole house water filter.

In General questions | Asked By Rian Bart | Apr 16 12
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