On Wed, 07 May 2014 13:27:29 -0700, Jim Thompson wrote:

This new, very well-insulated, foil-backed, house has one drawback...
the garage door opener range with the garage door closed is only about
20'

If the receiver is a separate unit, or if the antenna input is obvious,
do as already suggested and move the receiver or connect an external
antenna.

If not, and if for some reason you don't want to rip into the thing to
get at the antenna terminals, find out what frequency it works at
(probably 400-ish MHz), hang a simple dipole antenna outside your garage
with coax or twin-lead going to another antenna right at the opener.

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com