Green Mountain Panel, based in Brattleboro, Vermont, is one of the first producers in Structural Insulated Panels in the United States. Starting in 1981, Green Mountain Panel’s precursor, Winter Panel, started producing the finest quality Urethane Foam Structural Insulated Panels in a converted shoe factory in Brattleboro. Over the ensuing 30 plus years, Winter Panel shipped panels for over 3000 structures: homes, schools, commercial and institutional.