The Tstud™ is an engineered building product that uses two lumber members, and an internal truss system to break the thermal bridging common with solid wood wall studs and plates. Two versions are available. The pre-insulated version comes with low-GWP foam insulation in the truss section giving the product an insulating value of R-19. The Barenaked version leaves outoff the foam, so that dense pack insulation can be installed on site. T-studs are currently available in 2×6 and 2×8 thicknesses.