This topic has been closed by the administrator. Comments are no longer accepted.
I am putting on a metal roof put on over a single layer of composition shingle (old). The house is surrounded by pine trees. I have read in some threads here that the pollen and acids from these trees may become a problem for galvalume. I also read that galvalume and galvanized are similar but different products. Should I go with galvanized?
Or copy this URL:
https://www.metalroofing.com/spirit/comment/4290/find/
I have never heard of this potential problem but that doesn't mean it does not exist.
I would contact the manufacturer of any roofing materials you consider, explain the situation, and ask them for their input including whether the warranty would still be valid.
Or copy this URL:
https://www.metalroofing.com/spirit/comment/4291/find/
OK, it has been awhile. I did a keyword search with "pollen" on this site and turned up a number of these threads. Here's a response to one of them (if you don't mind me quoting):
Date: Mar 25, 2002 10:27 PM
Author: Todd Miller ([email protected])
Subject: Pine pollen
Hi Bill,
Well, I have to admit that this is a new question for me. I know that my company has lots of metal roofs installed in a particular area down south that has a real pine pollen problem yet I have never heard this problem before. That said, I know how pine pollen can get very sticky.
I suspect that you'd have the same problem with any other type of roofing too. Of course, though, I am sure you want your metal roof to looks its absolute best and I cannot blame you for that.
I will add that I do not think the pine pollen will cause any problem for the metal or the paint finish. So, what we're dealing with here is primarily a "looks" issue. I do think that, with summer rains and heat, you might find that the pollen will release and then wash off but you probably know better than I whether that will happen.
Your sponge idea doesn't sound bad. I would use a light detergent and then rinse with clear water. If the light detergent doesn't work, you could use a light mixture of trisodium phosphate and detergent and then rinse it with clear water.
The other option would be to power spray the roof.
I hope this helps. Perhaps some other readers of this forum will have ideas, too.
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXxx
I guess my question is simply this: do you guys think that the zinc content difference in "galvanized" metal as opposed to "galvalumed" metal would be less susceptible to pollen staining, acids from fallen pine braches, needles, etc.? I am willing to have trees cut to make the roof better, but if galvanized is impervious to this maybe I should consider it?
Or copy this URL:
https://www.metalroofing.com/spirit/comment/4292/find/
The only issues I have seen with pine pollen have been on painted metal roofing. I am not a chemist nor a metallurgist but I do not think that the base metal (galvanized or galvalume) would make any difference.
The issues I have seen have been where pollen settled on the roof and then, with dewy mornings, it became sort of like a "glue" that then stuck a bit to the roofing. Over time, it would wash away.
If the roofing is unpainted, I really do not know whetehr the metal type would have any bearing on things.
Sorry I cannot be of more help.
10/12/2004
10/12/2004
10/14/2004
10/15/2004