Hi Everyone,
I am n ot a big fan of the window applied UV films. As someone
previously nopted they do have a tendency to bubble and age and can be
quite difficult to remove in later years. Plus, it is my understanding
that the UV films do not last forever - at some point they will need to
be replaced.
I like the system that was put in place in Monticello - Thomas
Jefferson's home in Charlottesville, Virginia. Where sheets of UV film
are held in cleverly designed frames around the windows that are very
unobtrusive but allow very easy maintence and removal of the films if
necessary.
Cheers!
Dave
David Harvey
Conservator
Los Angeles, California USA
-----Original Message-----
From: Michael McHugh <[log in to unmask]>
To: [log in to unmask]
Sent: Mon, 25 Apr 2005 10:23:57 -0400
Subject: Re: UV+Security window film
Ms. Sperlin,
The film you may be thinking of that provides security and UV
protection is probably a component of laminated glass where a membrane
is bonded between two layers of glass (think of a car windshield). It
would have to be mounted in a secure frame. An installation in an
historic wood frame window would only be as strong as the wood muntins.
You can find info about surface applied UV films at the NPS websites
listed below:
http://www.cr.nps.gov/museum/publications/conserveogram/03-10.pdf
http://www.cr.nps.gov/hps/tps/technotes/PTN30/Introduction.htm
Mike McHugh
>Date: Sat, 23 Apr 2005 18:35:06 -0700
>From: Lucy Sperlin <[log in to unmask]>
>Subject: UV+Security window film
>
>Have any of you heard of or used a window film that is both a
security
>(break-in) control device and also provides UV protection? Apparently
it
>is applied directly to the window, preventing the glass from
shattering if
>someone tries to break it to break in. (Or it shatters, but they
can't break
>it to climb in the window.) It is being considered at our historic
house,
>and I'd like to hear from anyone who has experience with it or who
has
>looked into it and decided either for or against it.
>
>Our house has mostly old (pre-1900) glass. I am concerned about the
lasting
>quality of the UV filter (the security expert suggesting it has told
our
>director that the UV filter quality does not diminish over time).
After
>hearing about other directly applied films that buckle or bubble over
time
>and end up looking bad, I also wonder about its lasting quality in
that
>regard as well as the degree of difficulty of removal if removal
becomes
>necessary.
>
>If there is more than one company making such a product, is there a
>difference between them?
>
>Finally, if the impermeability is true, it seems to me that it must
have to
>wrap around off the edges of the glass to the window frame, or the
glass
>simply could be broken out around the edges. What would be the effect
on
>wood window frames?
>
>I would really appreciate anything anyone can tell us..
>
>
>Lucy Sperlin
>
>Patrick Ranch
>
>Chico/Durham, CA
-- *****************************************************************
Michael McHugh, AIA
LEED Accredited Professional
E. Verner Johnson and Associates
Museum Architects and Planners
222 Berkeley Street, Suite 1350
Boston, MA 02116
tel: 617-437-6262
fax: 617-437-1272
http://www.vernerjohnson.com
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