Comments on: Inserting the Insulation Into the Roof Ceiling http://ecobrooklyn.com/inserting-insulation/ 100% Green Building + 100% Affordable Building + 100% Sustainable Building = Build It Forward. TURN BROOKLYN GREEN! Tue, 09 Mar 2010 20:03:13 -0600 http://wordpress.org/?v=2.8.6 hourly 1 By: Gennaro Brooks-Church http://ecobrooklyn.com/inserting-insulation/comment-page-1/#comment-37 Gennaro Brooks-Church Sat, 20 Dec 2008 03:11:38 +0000 http://ecobrooklyn.com/?p=375#comment-37 Hmmm....It also depends where you are since that will determine your shipping price. Unlike my situation, space is not an issue for you. I need to get the absolute most R value per inch because I have to go between the joists. Another option you have is to use blown in cellulose. I like cellulose but it only works when you have space. It is more green than foam since foam uses petrochemicals and cellulose is just old paper. Combine that with a vapor barrier and you have a nice airtight setup. But that is just another option if you are not close to Brooklyn. If you are near then using my panels with a radiant/vapor barrier makes a lot of sense. You get the same airtightness as spray foam but a lot more R value per inch and a lot greener setup. I'll send you an email. Hmmm….It also depends where you are since that will determine your shipping price.

Unlike my situation, space is not an issue for you. I need to get the absolute most R value per inch because I have to go between the joists.

Another option you have is to use blown in cellulose. I like cellulose but it only works when you have space. It is more green than foam since foam uses petrochemicals and cellulose is just old paper. Combine that with a vapor barrier and you have a nice airtight setup.

But that is just another option if you are not close to Brooklyn. If you are near then using my panels with a radiant/vapor barrier makes a lot of sense. You get the same airtightness as spray foam but a lot more R value per inch and a lot greener setup.

I’ll send you an email.

]]> By: vinnie http://ecobrooklyn.com/inserting-insulation/comment-page-1/#comment-36 vinnie Sat, 20 Dec 2008 00:58:25 +0000 http://ecobrooklyn.com/?p=375#comment-36 I have been giving this avenue alot of thought. I have a 10/12 pitch attic truss roof to insulate. If I go with the ceiling insulation I plan a 2-3 inch spray foam and 12 unfaced fiberglass It gives about a real r50 but much more effective. However If I were to insulate under the actual roof deck I only have an 2x8 in member and am unsure as to airflow and deck temp issues. I have a ridge vent so there will be appropriate flow if i insulate the ceiling but If I were to follow your example I believe I would need a more airtight gap in order to replicate the spray in foams tightness and insulation value. In order to use your foam I would have to use a combination I think of both spray in and placing your panels inbetween as well as on top of the members to get the desired r value. Obviously I will not be getting a straight answer from the foam salesman. Any Ideas? the ceiling surface is about 35x55 whereas the ceiling deck is in total about 55x55 (both sides) If it could be figured out I could put a major dent in your foam stockpile. I have been giving this avenue alot of thought. I have a 10/12 pitch attic truss roof to insulate. If I go with the ceiling insulation I plan a 2-3 inch spray foam and 12 unfaced fiberglass It gives about a real r50 but much more effective. However If I were to insulate under the actual roof deck I only have an 2×8 in member and am unsure as to airflow and deck temp issues. I have a ridge vent so there will be appropriate flow if i insulate the ceiling but If I were to follow your example I believe I would need a more airtight gap in order to replicate the spray in foams tightness and insulation value. In order to use your foam I would have to use a combination I think of both spray in and placing your panels inbetween as well as on top of the members to get the desired r value. Obviously I will not be getting a straight answer from the foam salesman. Any Ideas?
the ceiling surface is about 35×55 whereas the ceiling deck is in total about 55×55 (both sides) If it could be figured out I could put a major dent in your foam stockpile.

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