#Design a truss online install#

#Design a truss online install#

Often the builder will install the subfloor directly to the bottom cord and drywall to the knee wall truss cord without installing any blocking or using an air sealing strategy. This low R-value, no attic ventilation and several areas of air leakage contributed to ice dams and water damage during this past winter and early spring.ДЄnother common problem is air sealing the knee wall areas. The home I tested had R-19 fiberglass with no air space. R-35 is possible if closed cell spray foam is used. This cord is often a 2 x 6, which will only allow a maximum of R-21 insulation in the sloped ceiling if using fiberglass batts without an air space above the insulation. Lets start with the top cord of the truss. IвЂ™ve encountered several of these poor performing attic truss spaces through the years. Cold in the winter and hot in the summer. The space looked nice, but did not perform well. The space featured a direct connection to the rest of the home, two bedrooms, a half bath and second living room area. I recently conducted an energy audit and blower door test on a home that was designed with an attic truss over a garage.

If the design is not well thought out, this added living space often has problems with air leakage and low insulation values. This truss is commonly used over garages to create a bonus room, but sometimes the space becomes bedrooms, offices, or even second living rooms. An attic truss is a type of roof truss with an integrated living space built into its design.