General Panel Corp

Manufacturers of Structural Insulated Panels (SIPs) and other Foam Sandwich Panels

General Panel Corp manufactures 3rd party certified structural insulated panels (SIPs) at our Union, MS Plant. 

Our Johnson City, TN Plant specializes in Foam Core Sandwich Panels (also known as skins or stress skins) which are intended for timber frame enclosure and moderate span log roof construction.  Nail Base panels (foam core panels with only one OSB skin) used in insulating, non-structural situations and specialty laminated products such as OSB/GYP (osb one side, sheetrock on the other), and OSB/MRG (osb on one side and moisture resistant drywall on the other), are also manufactured in TN.

Current Prices on panels

Using SIPs to replace conventional construction.

Timber frame enclosure information

Post frame/SIP options

Log home uses of panels

Technical information (Loads, spans, R-Value, etc.) on SIPs (Grenada, MS)

Technical information on stress skins and timberskins (Johnson City, TN)

For our Construction manual

For Construction Details

For our newsletters

For a collection of articles about SIPs


Johnson City, TN 37602  PO Box 5235 (423) 747-8710,  fax (423) 434-9382, , Butch Johnson      

Union, MS 39365 PO Box 256, (866) 774-0530,  fax (601) 774-5777,  , Cathy Graham

If you would like a bid on an existing houseplan, please send your plans to our estimator in Union, MS.