Two faces profile - T&G V-joint on one side and T&G Ship-Lap on the other side. 

Siding is four sides factory oiled (no needed additional oiling after installation).

The thermo-treatment process uses extremely high temperatures - 400 degrees F with no chemicals added. It changes wood on a molecular level to make it durable and dimensionally stable. The treatment burns poly-sugars and makes wood water repellent on a molecular level; therefore thermo-treated wood is naturally durable and stable. The color of the wood is consistent beyond the surface.

 
 
FAS Grade Thermo-Treated Poplar
 
 
100% Green
 
 
15/16” x 5.25” (5" coverage)
 
 
Naturally durable due to thermo-treatment
 
 
25-year Warranty
 
 
Dimensional stability increased 5-10 times
 
 
Less maintenance
 
 
Light in weight (2.5 Lbs/SF)
 
 
EMC reduced to 2-4%
 
 
Reduced combustibility (Class B fire rating)
 
 
Improved resistance to termites
 
 
Janka Hardness – 600 Lbf.
 
 
4-sides factory oiled