Wood-clad - low-maintenance exterior (usually vinyl or aluminum) and a temperature-transfer-resistant wood interior. Aluminum - great for rainy, humid climates Composite - scrap wood shavings and plastic resins can mimic the look of wood but are virtually maintenance-free. Fiberglass - the strongest and most durable windows on the market. Extremely energy efficient thanks to low thermal conductivity. Can be repainted several times. Don't twist or warp like vinyl or wood. Common Questions What are Acoustic Glazed windows? What are Fire Rated windows? Can I paint my vinyl windows? Can I damage the UV coating by using the wrong window cleaning solution?