General Panel Corp

Manufacturers of Timber Frame enclosure panels

Over 95% of all Timber Frame structures are enclosed with EPS foam core panels.  Learn why!

106 Perma R Rd, Johnson City, TN 37604

General Panel Corp manufactures foam core panels for the enclosure of timber frame structures.  We work with most of the timber frame craftsmen in the Southeast and in much of the rest of the country.

We provide panels to the framers and to the owner/builders.  We can also provide panels for Hybrids- part timber frame and part Structural Insulated Panel, where only a portion of the structure is timber frame.

About timber frame enclosure

Types of panels and ordering details


Why timber framers choose EPS core panels to enclose their timber frames


Construction pictures

Pictures of completed projects

Commercial projects


Construction Details

Construction Manual and Installation Guidelines

Mechanicals and Siding


Shop Drawings


Energy Efficiency (423) 747-8710

We are members of the Timber Frame Guild and the Timber Frame Business Council and support Guild activities.