Blog
How to Install Pediments and Pilasters: Door, Fireplace and Window Surrounds
A pediment over a door with a pilaster on each side is the classic door surround. It makes a plain entry, fireplace or interior opening look built in. Spectis pediments and pilasters are molded high density polyurethane (HDP), shipped primed and ready for paint, and they are cut and fastened much like wood trim. This guide covers the pediment styles Spectis makes, how to size a pediment and pilasters to your opening using the Spectis entrance system chart, where a surround works indoors and out,
…
Oct 9th 2026
How to Install Crossheads & Pilasters
THINGS YOU WILL NEED TO INSTALL A CROSSHEAD AND PILASTERS:
Tape measure
Saw
Framing square
Hammer
Putty knife
Screw gun
Exterior grade Stainless Steel screws or nails
Caulk gun
2' or 6' level
PL Premium Adhesive
Installation of the Pilasters
First measure the height of the door from the top of the door down to the landing.
Note: Be sure to include any existing trim such as brick mold in your measurement.
1. Once you have your measurement, mark the height on the
…
Sep 30th 2026