The thickness of the frame usually matches the wall thickness. Common materials for door frames include wood, steel, aluminum, and PVC. The choice of material depends on factors like durability, ...

The Steel Window Association has developed a series of fact sheets; all are viewable and downloadable via a link in this ...

This section is devoted to general window design and materials of construction. Commonly referred to as hollow metal, these doors and frames are available in many standard sizes and configurations and ...