Gentlemen; Is one brand of fiberglass insulation better than others or are they pretty much alike? The reason I ask is because when taking down the insulation in my house, which was put up in 1974, it seems like the insulation is” brittle”, for a better word. I dont know the brand of the old stuff. Fibers everywhere and not very dense. I bought a roll of Owens-Corning r-19 kraft faced to put around the top of the foundation between the joists. The new roll seemed to be a much better product.
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Replies
CMBB-
It's really a matter of the age of the old stuff. Fiberglass in general has gotten much better in recent years, and seems to be less itchy too....
Bob
Bob; I think your right. I have been debating whether to replace it or just put the old back. After working with the new stuff I will probably put in new.
I think sometimes the machine must get out of adjustment at the factory, or there might be differences in the slag it is spun from. I have seen differences in the same brand, same load. There is, you probably know, a new white fibreglass that is smooth as cotton.
Fonzie, believe it or not, fiberglass is spun. The whole process is fasinating to watch. The quality control has gotten a whole lot better over the past 30 years. The brittleness of older f/g is because of the older formulation of resins that were used then. Improved formulas and qc esulted in a safer and healthier product than what was produced thirty years ago.
I once worked for American Air Filter and became qualified as an "assitant glass spinner." The same process is used to make f/g insulation.
Dave
That would be interesting to see.