I wrote: > If anyone is serious about ground screens I believe you are well advised to use real copper which will last forever (but I hate to think what that might cost). A 3' X 100' (300 sq ft) roll costs only $1,683, so I assume a 20' X 20' square screen (400 sq ft) would be about $2,244. :-)) http://tinyurl.com/ml3gzq 73, Bill W4ZV