Better nail/screw holding strength, high strength, high toughness
For the Full WPC door frame, because of inner foaming and it is made by PVC and wood composition( wood content is less than 20%), so it has problem of weak nail/screw holding. Especially because it is so heavy, so the door frame may relax after some time of using.
For the WPC+LVL door frame,the inner is high density LVL (Laminated Veneer Lumber) which has advantage of high strength, high toughness, and resistant of fatigue failure caused by periodic stress, and high nail/screw holding strength. So the nail/screw holding strength of WPC+LVL door frame is as high as original LVL product.