I am trying to build or buy window well covers that last for a longer period than those normally available through HD and others. The size and shape are an issue. The wells are semi-circular and concrete/rock bordered as opposed to metal, since they are set in a concrete/rock-covered patio. The approximate sizes are 52 inches across at the wall; 22.5 inches radius of the semicircle and 12 inches high at the wall. Since I cannot find a suitable cover to buy, i am cosidering building them with wooden frames and plexiglass covers. I am attaching my ideas (which appear difficult to cut the pieces) in the hope that someone can offer suggestions.