Caroline,
I am taking the floor and roof issue separately. As with the sample with gypsum board, the surface temperature of the floor will be higher. This is difficult to achieve with air temperature since warm air rises to the top of the room, radiation does not and will heat the floor more efficient with the reflective barrier. You will have a better effect with a reflective barrier on the attic, than if you have a white roof, http://www.savenrg.com/ Hakan At 01:10 PM 9/24/2002 -0400, you wrote: >At 12:10 AM 9/24/2002 +0000, you wrote: > >If we want to make something better, we have to look for a material > >or mixing with a material that give a significant reduction of the > >emission factor for the wall (like aluminium). Maybe straw with > >aluminium mixed in the glue (clay traditionally). I think that > >research should be a little more advanced than only attempt with non- > >traditional materials." > >I am going to ignore the argument portion of this exchange. According to >the research I could find on reflective insulation, which I will admit, >was a couple of years ago, Reflective insulation is only effective as long >as it is still "shiny" (not dirty) and has a space to reflect back >toward. Thus it seemed to me that putting reflective insulation in a >concrete floor, as is recommended by some companies is a waste. Also, if >the reflective insulation is installed in a place it can accumulate dust >or dirt (attic floor) it will eventually become useless unless it is >cleaned. Installing it under the attic roof, over the joist is better, but >still will possibly need to be cleaned eventually. >After all this, I determined a reflective roof to be the best choice for >reflective insulation properties. I could not see that the cost/benefit >ratio of reflective insulation installed in walls was better than using >additional traditional type (cellulose) insulation. >I attended a DOE conference and one presenter stated that if California >had all white or reflective roofs, there would be 100 less smog days a >year. I thought that rather significant and asked why there was not more >reflective roofing available or used. He said that it is an esthetic >problem- people just prefer the look of dark or black roofs. Personally, I >think if people were informed of the potential energy savings, that would >not be the case. >Caroline > > > > > >Biofuel at Journey to Forever: >http://journeytoforever.org/biofuel.html > >Biofuels list archives: >http://archive.nnytech.net/ > >Please do NOT send Unsubscribe messages to the list address. >To unsubscribe, send an email to: >[EMAIL PROTECTED] > >Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ ------------------------ Yahoo! Groups Sponsor ---------------------~--> 4 DVDs Free +s&p Join Now http://us.click.yahoo.com/pt6YBB/NXiEAA/MVfIAA/FGYolB/TM ---------------------------------------------------------------------~-> Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuels list archives: http://archive.nnytech.net/ Please do NOT send Unsubscribe messages to the list address. To unsubscribe, send an email to: [EMAIL PROTECTED] Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
