Re: [GBlist] Qustn: Rigid Insul above exist'g roof

[Barbara Lamprecht <mac@cacr.caltech.edu>]

Dear Frazer, I couldn't agree with you more. As budget permits we will be
taking out some of the glass and replacing it with Polygal in some places,
dual-glazed tempered in others, and solid walls in others, and some heavy
fabric for curtains inside for winter, outside for summer , something like
velvet/nylong weave  or equivalent, it would be interesting to find out
whether there is a "technical velvet" out there.

As for the venting, if I sound illogical, it is because I am a little
confused where/when to vent or not; from reading the list I know that it is
important to consider. It is my thought that the newly insulated roof had to
be vented. For another interior ceiling, in the kitchen, I added 6" rigid
between joists before adding drywall to a newly deepened ceiling, and added
foam at the fascia blocking between the extended rafters, and frankly, the
room is no better in performance, which i think is due to my lack of
understanding in what needs to be vented.

Best wishes,
barbara

Frazer Dougherty wrote:

> Barbara (and Ralph) - seems fine, although adding R- 24/25 to offset R-1
> glazing is sustainably questionable.
>
> Please run the numbers and let's also have the logic on this 'add vents
> though'. What are you venting and to where ??
> ---------------------------------
> Frazer Dougherty
> North Fork Retrofit & Solar Options
> Mail - Box 4016, East Hampton, NY 11937
> Ship - 75 Industrial Rd, Wainscott, NY 11975
> t -  631.537.1654
> f -  631.537.1637
> c - 631.654-3534
> fpd@solaroptions.com
> www.solaroptions.com
> Insight '00, citrus yellow, 60.8 lmpg


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