Any other carpenters and wood workers here?

[NOLA_Ken]

I have a question.... I recently got a large bar mirror that is in one of those extruded pvc frames. It's pretty heavy, this thing is 3 feet across. It's come loose at the corners, and I plan to repair it over the weekend but I've never worked with this stuff before. I know there are glues for it, but I want to make sure I use something that is going to be really strong, but that isn't going to do any damage to the frame. I'll put a couple trim screws in each corner to be sure but I would hate to hang this thing up and have the frame come apart while I'm at work and come home to a pile of broken glass....

 

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[chatterbait]

Was just thinking about your problem.If you took a strip of metal( alum.,steel) 1/4 inch wide say 3" long and drill a small hole at each end then on the back screw small screws into each corner that would keep them from spreading apart.Good luck.

 

[old digger]

First, if possible, clamp all the corners tightly. Then cut four corner (90 degree angle) triangle pieces of 1/8 inch thick wood. First apply a wood glue on side to be applied, then clamp down at each corner, after you clamp it tack down with 1/4 inch tack or nails. Let glue dry for at least 24 hrs. then remove clamps, and attach picture hanger. I hope this works out for you.
Another possibility is to cut out a 35'' x ?'' 1/4 inch panel board and glue/tack it on the back.

 

[Mifarmer]

Old digger is on it, unless you don't want to mark up the back. Also do not use gorilla glue, it expands and foams during the drying process.

 

[Xraywolf]

Not sure why anyone would use wood glue on PVC.

They make PVC bonding agents, easily available at home depot, that for all practical purposes welds it together.

 

[hvacker]

A mitered corner is one of the weakest joints wood workers deal with.
Wood glue will work as I've done it a few times but like Xraywolf posted there are specific glues out there that should be better.
Some solutions are splines but as your not a WW yet it's not the easiest repair. I would probably see if my miter clamp could be used. I realize you might not have these clamps. I did see Harbor Freight has them cheap and you don't need to buy four. They can be done one at a time if careful. Back when I made frames for an artist, I only had one clamp. You've heard of starving artists, yes.
If not I'd look at re-glue and a thin piece on the back
like "old digger" said.
Last I might re-glue and use screws. Visible screws aren't desirable from a WW point of view because it looks disparate.

 

[old digger]

Allbeit, use a two part epoxy instead of wood glue, but instead of nails pre-drill holes and use some small short screws. The epoxy should adhere the wood to the plastic.

 

[Peyton Manning]

IF it is pvc, it takes both a cleaner and then the glue just like for plumbing

 

[Peyton Manning]

actually I would just put it in a wood frame