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My experience with IR guns makes me distrust them on reflective surfaces, possibly for the reasons you suggest. BTW, I grew up near Powell Butte in Portland. In the 60's the slogan was "Keep Oregon Green." Last year I saw bumper stickers that said "Keep Oregon Weird." I miss home. |
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I live in the St John's area. You don't see many of the "Wierd" bumper stickers in this part of town... it would be redundant. -AC |
@ Mikesolar
I guess my problem with this whole tangential discussion is the idea that there is someone in this discussion that supports reflective bubble wrap. No one here does who is at all informed, least of all me. It just seems like a straw man to get people riled up that signifies nothing. The thing that irritated me so much was the migration of the bubble wrap issue (or vice versa) to Michael's post that the mylar flat reflective material was inherently defective. No evidence except his own heresay is given as evidence. But his description was not challenged because there is so much prejudicial evidence from the reflective bubble wrap issue. As a person who has covered his entire rafters with the non-bubble wrapped version of the stuff I find that objectionable. But for some reason my issue about that is conflated by you and others as a reflective bubble wrap issue. It isn't. |
Part of my irritation is no doubt my own fault. I should have been more direct at the very beginning in challenging Michael's assumptions about the flat reflective barriers and asking for more evidence from him. My bad.
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Well Michael, you said that in your experience the reflective material tends to just flake off. That certainly isn't my experience. Maybe what you are looking at is based on a different substrate from what I'm using. I don't know. What I'm using is a plastic poly type substrate and the silvery material is stuck on very securely. I don't see much of an issue there with it flaking off.
Also, you said that you didn't think that it would reflect radiation because one side of it is in contact with a surface of some kind, be it the substrate itself or something else. That isn't the way it works. Only one side needs to have an airgap. The other side can be in direct conductive proximity to any material. That is the physics of a reflective material - it does not conduct light or heat from one side to the other, but instead reflects it back. Sorry to be so late with this. |
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Please read my posts on this again. I am NOT dissing radiant barriers although I think the insulation aspect of the bubble part has been misrepresented by the industry. I am, however, stating where, in MY climate, they will work best. Mylar coatings are great and like I said somewhere earlier, I have used them as a radiant barrier first in 1993, and still do. That house did not use bubble wrap just mylar coated building paper (which is still in good shape, BTW. For most of my history I hated cooling because it was never needed where I grew up. No one had it. Things are different now and cooling is being demanded and I have to work with that. Your reflective barrier in the attic is a good choice and I have nothing against it. |
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That makes me feel a lot better. No hard feelings on my part. Continue as you were, all of you.:D
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