[Greenbuilding] R20 window insulation?

[Bob Waldrop]

It is a rigid foam insulating board, it has aluminum foil on one side and a 
plastic film on the other, and I used the 3/4in because that's what I could 
buy off the shelf locally.  If you use less of it, you get less insulation. 
R-value,  It is R-5 for 3/4 inch.

Bob Waldrop, OKC

----- Original Message ----- 
From: "Gennaro Brooks-Church" <info at ecobrooklyn.com>
To: "Environmentally-preferable design, construction,building elements" 
<greenbuilding at lists.bioenergylists.org>
Sent: Thursday, January 06, 2011 9:25 PM
Subject: Re: [Greenbuilding] R20 window insulation?


What is Rmaxx and does it make a difference if it is thinner?

Gennaro Brooks-Church

Cell: 1 347 244 3016 USA
www.EcoBrooklyn.com
22 2nd St; Brooklyn, NY 11231