"twfsa" wrote in message
news:nSbLe.218$5U2.201@lakeread07...
The(asphault) concrete expansion joint rotts away about every 3 yrs.

The gap is about 2 1/2 inches wide double drive, I am thinking of
removeing
it and filling it with that spray can foam they use to seal leaks around
windows and doors to drafts out.

What do ya think?


Bad idea..I almost almost guarantee you that polyurethane foam won't last
more than one season in any climate.

Suggest fill it about 1/2 the way up with sand and then top seal it with
someting that's designed specifically for the purpose--find some kinda
rubbery **** that will expand / contract with the season but yet still keeps
water from getting in there, and that is also relatively stable to sunlight.

I been out of pavements for near to 30 years now, but some things will never
change......

What you DONT want is to ever have any situation where water is getting
under your concrete and is washing the base supporting the underneath of it
away.

--

SVL