About Chelsea Building Products

You Deserve to Work With the Best.

Since 1975, Chelsea Building Products, Inc. has been designing and extruding PVC and composite profiles for the building materials market. From its headquarters in Oakmont, PA., Chelsea is an integrated manufacturer providing product design, material development, extrusion tooling technology and finished product to manufacturers and distributors throughout North America.

It's time. The last time.
To install the last siding your home will ever need.