In rare cases, the panel substrate or the adhesive emits gas, which creates the pressure that causes the bubbles.

Fiddle-back grain, gluing ipe by Gene Wengertwooddoc.uwalumni.com Gene Wengert, "The Wood Doctor," has been training people in efficient use of wood for the past 35 years. He conducts many short courses and has written hundreds of practical articles and books covering all aspects of converting logs into lumber and