What are the disadvantages of fiberglass doors?

The disadvantages of fiberglass doors include higher cost, potential finish issues, limited size modification, and vulnerability to cracking under extreme impact, despite being considered premium doors. First, cost is biggest disadvantage, fiberglass doors cost 2 to 4 times more than steel doors, with premium fiberglass like Therma-Tru Classic Craft costing 2,000 to 4,000 dollars slab versus 300 to 800 dollars for steel, making them expensive for budget homes. Second, finish maintenance, stained fiberglass doors can fade from UV exposure and require restaining every 3 to 5 years to maintain wood look, and painted fiberglass can peel if not primed properly. Third, cracking, fiberglass can crack if hit hard with sharp object, unlike steel which dents but does not crack, and cracks are harder to repair. Fourth, limited trimming, fiberglass doors cannot be trimmed more than 1/4 inch on each side due to composite frame and foam core, so precise sizing is needed. Fifth, not as strong as steel for security, steel is stronger against forced entry though fiberglass is still secure. Sixth, lower-end fiberglass doors can look fake, with unrealistic wood grain that looks plastic. Seventh, installation requires more skill due to weight and need for proper flashing. Eighth, environmental impact, fiberglass production uses chemicals. Despite these disadvantages, fiberglass doors last 30 to 40 years, resist rot and rust, and offer best energy efficiency, making them worth cost for most homeowners despite higher upfront price and finish upkeep.

Disadvantages of fiberglass doors include higher initial cost than steel, difficulty to repair if damaged, can crack under severe impact, limited ability to be trimmed for custom fit, and potential for skin delamination with poor quality doors, though overall fiberglass is considered premium durable option with more advantages than disadvantages. Fiberglass entry doors are made from fiberglass reinforced skin with polyurethane foam core and composite frame, wood look without rot, made by Therma-Tru, Plastpro, Masonite, with cost being main disadvantage, price 600 to 2,000 dollars prehung vs steel 300 to 800 dollars, making fiberglass 50 to 100 percent more expensive than steel, though cheaper than solid wood. Repair difficulty is disadvantage, if fiberglass skin is deeply scratched or cracked from impact, repair is harder than wood which can be sanded and filled, with fiberglass requiring professional repair or replacement of skin, though small scratches can be touched up with paint. Fiberglass can crack under severe impact like heavy kick, though more dent resistant than steel, but severe impact can cause spider cracks in gel coat. Trimming limitation, fiberglass doors cannot be trimmed much for custom fit, typically only 1/4 inch off each side, vs wood doors can be trimmed more, so rough opening must be accurate. Some low quality fiberglass doors can have delamination where skin separates from foam core if water penetrates or manufacturing defect, causing bubbling. Also fiberglass doors are heavier than steel? Actually lighter than steel? No similar weight. So disadvantages are higher cost than steel, hard to repair major damage, can crack with severe impact, limited trimming, and possible delamination with cheap brands, but advantages outweigh for most homeowners seeking durability.