Continuing our exploration of alternatives to plastic-based building products is a new US based company named TimberHP. They have created an entire roster of wood fiber based, cellulosic, insulation materials. Although pure wood fiber insulation has been in use in Europe for two decades, TimberHP is the first company we are aware of to bring this technology stateside. They are planning on producing three different products: TimberFill is a loose-fill, wood fiber alternative to cellulose; TimberBatt is a cavity batt, wood fiber alternative to fiberglass and spray foam; TimberBoard is a rigid board panel, wood fiber alternative to EPS, XPS, GPS, PUR- all of them plastic based insulation materials.