Fiberglass
ProsModerately priced. Very dent-resistant, our tests show. Low-maintenance.
ConCan crack under severe impact.
Features to noteAvailable with smooth surface or embossed wood-grain texture. Edge treatment on some doors makes them look more like wood. Can be painted or stained. Energy-efficient, though adding glass panels cuts insulating value.
Expect to pay$300 to $1,750.

Steel
ProsInexpensive. Low-maintenance (unless you have to deal with dents).
ConsEasily dented, we found. Dents are hard to repair. Scratches pose the risk of rusting if they aren’t painted.
Features to noteEnergy-efficient, though adding glass panels cuts insulating value.
Expect to pay$135 to $1,550.

Wood
ProsThe high-end look that other materials try to mimic. Least likely to dent. Scratches are easily repaired.
ConsExpensive. Requires regular maintenance--painting or varnishing--to look its best.
Features to noteRails and stiles (vertical and horizontal parts) made of laminated wood covered with veneer provide the greatest resistance to warping.
Expect to pay$500 to $2,500.