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parker650

XPS fastening to concrete walls

parker650
13 years ago

I've got a 12 year old colonial with poured concrete foundation walls. I can already tell the walls aren't square and am not thrilled with the thought of using adhesive...

So, which of these would you recommend:

A. 1/4" Tapcons with washers

or

B. 1/2" x 3 3/4" concrete wedge anchors

Keep in mind that I have a hammer drill but it is a big old Milwaukee with 1/2" bits, so I'd most likely have to purchase a different (smaller) hammer drill just to use the tapcons. With the drill that I have I can install the wedge anchors no problem. Wedges are double the price but I won't need to buy another drill...

My concern is with the heat/cold conductivity of the larger anchor, could that cause any issues?

I'm thinking of anchoring each 4'x8' sheet of XPS with 2 anchors (midpoint at 2' and 6' up) then framing a wall up tight against it. Once I plum the wall I'll use wedges as needed to keep pressure on the XPS.

Any thoughts or recommendations???

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