Hi All: I am having apll my windows replaced with vinyl windows. The
old weights and ropes will be discarded. The contractor wants to
insulate that space were the weight goes with pink fiberglass. I would
rather that he did not bring fiberglass into the house because we have
allergies. Is there an alternative material I can ask him to use?
I would think that fiberglass would be about the least likely to cause you
any allergy problems, at least compared to any foam insulation that would
have chemicals or blown-in that would stir up dust. I'd just make sure he
cuts it and does as much of the handling outside and perhaps passes the bats
through the window at the point they will be used rather than carrying them
through the house.
Fiberglass is easier though. I don't know of anyone allergic to it. If you
handle it, you can get itchy. Sealed in the window, it is far less reactive
than any other material for insulation.
IMO, since there is a certain size space for every window, I would suggest
put the Fiberglas into a 'tube' of polyethylene, roll the ends and staple
them, and bring them in and put them into the sash weight space. You would
not have an allergic response to it, but you can still have dermal
sensitivity to Fiberglas if you touch it. After all, it is spun glass fiber.
And there is potential carcinogenicity if it's inhaled.
You can have a sensitivity reaction to fiberglass but you can't be
allergic to it. Alternatives are filling the cavity with an
expanding foam (but than can be tricky) or you can use something like
the preformed foam roles used to insulate pipe. Oher possiblities are
rock wool (also itchy) and if you can seal the cavity at the bottom
and sides you could use pour in cellulose insulation.
Fiberglass does not cause allergenic reactions! It may cause reactions
that appear like allergenic reactions. Having allegories will not increase
your likelihood of having a problem.
While there are down sides to fiberglass, over all it is one of the
safest of materials to use.
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