First, it sounds like one of the options is to put a new roof directly on top of an old one. I would not do this. Not only would this be a problem if the top one leaks, but you can't inspect it from underneath. So many times we've seen houses that have no attic access and it usually causes problems.
To: DoIt_Yourself@yahoogroups.com
From: mountain953346@yahoo.com
Date: Sun, 3 Feb 2013 13:35:16 +0000
Subject: [DIY] Outside Roof Insulation versus Inside Ceiling insulation project
We have 2000 sq ft roof that is composed of 1x8's over
4x8 on 8ft centers, then asphalt roll and tar covering the 1x8's.
That's it. There is no insulation and we are loosing most
of AC and heat through the roof.(It is a low-slope "flat" roof)
We have computed the costs for doing a new inside the house drywall
ceiling dropped down 3 1/2" with r-15 fiberglass insulation
at about $1.25 a sq ft. minus labor..having done drywall
before we are confident to do the work although it seems
a lot more intensive than adding new roof...??
Add roof approach is to add 2x4s on 16in centers on the roof
and put insulation there, then cover with 3/8" CDX and asphalt
roll roofing over that which is now on the existing roof
(maybe 25 year old roof now so could use a replacement)...
essentially making a new roof....we also have done DIY
in this area. Costs of materials about the same.
It seems to me that the roof approach is way less labor
intensive than beaming the inside ceiling, juggling
even lightweight drywall, insulating and screwing and taping
and mudding the inside ceiling...
I would be very interested in the DIY'ers thoughts on the
approaches to this project...or a new approach we have not
thought of to solve this upward massive energy drain. In the
summer the ceiling inside is a virtual radiator. We live
in San Diego away from coast 15 miles so it gets hot but
does cool off at night (semi-desert climate).
Thanks in advance for any and all thoughts and ideas.
Rich and Kate.
4x8 on 8ft centers, then asphalt roll and tar covering the 1x8's.
That's it. There is no insulation and we are loosing most
of AC and heat through the roof.(It is a low-slope "flat" roof)
We have computed the costs for doing a new inside the house drywall
ceiling dropped down 3 1/2" with r-15 fiberglass insulation
at about $1.25 a sq ft. minus labor..having done drywall
before we are confident to do the work although it seems
a lot more intensive than adding new roof...??
Add roof approach is to add 2x4s on 16in centers on the roof
and put insulation there, then cover with 3/8" CDX and asphalt
roll roofing over that which is now on the existing roof
(maybe 25 year old roof now so could use a replacement)...
essentially making a new roof....we also have done DIY
in this area. Costs of materials about the same.
It seems to me that the roof approach is way less labor
intensive than beaming the inside ceiling, juggling
even lightweight drywall, insulating and screwing and taping
and mudding the inside ceiling...
I would be very interested in the DIY'ers thoughts on the
approaches to this project...or a new approach we have not
thought of to solve this upward massive energy drain. In the
summer the ceiling inside is a virtual radiator. We live
in San Diego away from coast 15 miles so it gets hot but
does cool off at night (semi-desert climate).
Thanks in advance for any and all thoughts and ideas.
Rich and Kate.
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