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Hi..finishing off my basement and am using sheets of foamboard to
cover the concrete. I have used the proper adhesive but in some
places where the concrete is not smooth the foam has some loose ares/
bulges. I want to use some tapcon screws to hold the foam in place.
The thing is I cannot find any washers to use with the tapcon screws.
Yes I can use two washers per screw but I am looking for plastic or
metal washers that are about 1" - 1.5" in diameter and have a hole of
about 3/16". Not to be found in Newfoundland. They do not even sell
felt tins here anymore (HomeDepot, Kent, Rona etc).

Can anyone recommend something I can use? I was looking for a plastic
tube that meets the measurements that i could make washers out of -
but can't think of what exactly.



*Plaster washers might work. They are thin, wide and take a drywall screw.
Something else are those pins that are used to hold duct liner onto ducts.
I don't know the name of them, but you can try a place that sells duct. The
pins get glued onto the wall and then the insulation goes against them.
Then a large washer is slid over the pin and is held in place by friction.
The pins can be trimmed back.

Also check mcmaster.com. They have quite an assortment of hardware.