using plexi/acrylic over alumalite

[fozzie]

did the standard "donor" name recognition sign for a client. cut vinyl on 4 x 8 alumalite. client mounted to outside of building.

now asked about putting a plexi or acrylic sheet in front to keep vandals from picking letters. no experience with this.

said he would screw plexi/acrylic into the sign.

questions - we are in upper illinois with weather extremes. concerned about water getting behind plex/acrylic and freezing, condensation, etc. something to worry about?
better installation method to tell him besides screwing it in?


thanks in advance.

 

[J Hill Designs]

I've seen hot summers turn cut vinyl on substrate behind plex cover into a mess I know that

 

[shoresigns]

In my experience, even two pieces of acrylic sandwiched together will get moisture trapped in between. If the signs are exposed you'll probably have this issue.

 

[CanuckSigns]

I would avoid it, you would be better off to apply the vinyl in reverse to a sheet of lexan, then back paint it and use that as your board, the vinyl can't be picked off and no worries about different expansions.

 

[CanuckSigns]

this is also the first time i've heard of an outdoor donor wall, sounds like a bad idea, vandalism would be killer!

 

[signpro]

are you going to be adding names to this board in the future?
if not, why not just laminate over the entire board & cut vinyl names?
the no one can peel off the letters.

cheaper than buying and fabricating a way to hang lexan over it
or redoing the entire sign reversed on lexan.