Re: [hreg] RE: Green Homes
- I think those are good suggestions to a common problem, all make sense,
and all are appropriate for this climate. Kevin
----- Original Message -----
From: William M. Bell, Jr. <wmb@...>
Sent: Monday, February 05, 2001 1:50 PM
Subject: Re: [hreg] RE: Green Homes
> We are in the process of building a home in the Houston area.
> It is very easy and not too expensive to build an energy efficient home.
> 1. Vent Skin or Envelope. That means that there is an outer skin, an air
> space, and then an inner wall that contains a reflective or radient
> In our case, we used foil-backed OSB board for sheething. We then used
> treated 1x2 stripping, lined up with the interior studs. We then put our
> fiber cement board over the firring strips. This meant that the sun
> (especially the western and eastern exposures) strikes the fiber cement
> board (which does not retain much heat). Because there is an air space
> between the fiber cement board and the interior wall of the house, the
> can only be transmitted through radient energy. The Radient barrier on the
> OSB board reflects about 80% of this radient heat. The air space is part
> a total, natural venting system which draws heat and humidity from the
> house. The cooler air enters at the bottom of the wall, rises to to top of
> the wall and up the rafters and out the top of the house ridge vent.
> At 4:00 pm in August, the western side of the wall (inside the house and
> before insulation) did not feel warmer than the ambient air.
> The entire additional cost for a 27' square house:
> >$3.00 to $5.00 per sheet for the OSB Board with the radient barrier,
> 80 sheets = about $240 to $400
> >1x2 x8' firring strips 100 x 2.50 = $250 (I can't remember the exact
> >additional labor for firring around windows $200
> Total additional expense was $690 to $850
> This is a small amount to dramatically improve the energy efficiency of a
> 2. Orientation to the sun. This is simple. All it takes is some planning
> self control. Don't buy a lot that forces you to orient the house in an
> inefficient manner. Don't put your big windows on the east or west
> 3. Overhangs. This will keep out the direct summer sun and will help
> preserve your home from the effects of the weather.
> These three, simple items can really help to keep the house cool in summer
> and warm in winter. Most of these ideas can be supported from information
> found at the Florida Solar Energy Center. Most of the solar information
> I have reviewed in the past was designed for solar heating. That is not
> problem here.
> ----- Original Message -----
> From: Steve Stelzer <steve@...>
> To: <firstname.lastname@example.org>
> Sent: Monday, February 05, 2001 9:01 AM
> Subject: [hreg] RE: Green Homes
> > The Houston Habitat for Humanity Director told me two years ago that
> > typically build an energy efficient house. They started with a
> > demonstration house built with the National Association of Homebuilders
> > various other organizations, including the Florida Solar Energy Center,
> > optimize the basic Habitat house about ten years ago. I believe they
> > fairly standard building materials, with the "green" characteristic
> > the energy efficiency.
> > Regards,
> > Steve Stelzer