fiberglass, steel, and wood - each have strengths and weaknesses. And while a low-priced steel door can be the equal of a wood or fiberglass door costing five times as much, it's not the best choice for wear and tear.

the average door install costs $5,000, but if you want a plain, no-frills door it won't cost as much. He says a basic steel door will cost $1,500 and a fiberglass door will range from $2,000 to $2,500. He says wood doors typically cost about the same as fiberglass, unless they're specialized.

Unlike wood doors, fiberglass entry doors do not shrink, warp, split, crack or delaminate. They're ideal for harsh or humid climates. Security - The solid construction of fiberglass entry doors provides significant security over wood doors.