Tuesday, July 3, 2007
Sheltering Exterior Doors
A sheltering overhang of some sort is always advisable for wooden exterior doors. This is especially true of stained doors, because natural finishes break down quickly when exposed to sunlight. Some companies offer a factory application of hi-tech natural finishes. When a door is exposed to the weather, this is a good option.
"Exterior doors are particularly vulnerable to warping because of the extreme differences between interior and exterior temperature and humidity."
stable, manufacturers usually build stiles and rails with a stave core. Another approach is to laminate thin boards together to create thicker boards.
Plywood doors are now available in fancier styles than old flush doors. These new doors have an inner core of steel and foam, a thick veneer of oak plywood, and surface moldings with traditional designs. Hardboard doors, made from compressed wood fibers, can be flush (smooth) or stamped with a traditional raised-panel design.
Steel doors are a good choice if both sides will be painted. Steel is strong, stable, and relatively inexpensive. With the development of raised moldings and embossed wood graining, steel doors now look more convincingly like wood frame-and-panel doors. Other types of steel doors have a wood-grained vinyl coating that can be stained.
Most steel doors are sold as a unit that includes the frame. When buying a steel door to retrofit in an existing frame, look for a door with wood edging that protrudes slightly beyond the steel skins. These doors permit some trimming to accommodate an out-of-square frame. While steel doors don't rot, they can rust. In exposed
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