Do it Yourself: Re: [DIY] Re: Outside Roof Insulation versus Inside Ceiling insulation project

04 February 2013

Re: [DIY] Re: Outside Roof Insulation versus Inside Ceiling insulation project

I seem to recall them using spray foam roofing on one of the projects from the This Old House Series.

Dale in the Flatlands.

mountain953346 wrote:

Good idea...we are seeking at least R-15 or better..does this
foam meet or exceed that...I cannot tell..the table they
supply is kinda obtuse to read..it reads like a military
contract to me...

Rich

--- In DoIt_Yourself@yahoogroups.com, "Ed" wrote:
>
>
> Possibly have the roof coated with a white spray foam insulation such as:
> http://henry.com/sprayfoaminsulation/roof/roofsprayfoam
>
>
> --- In DoIt_Yourself@yahoogroups.com, "mountain953346" wrote:
> >
> > 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.
> >
>