November 10, 2022
Building Trusses On-Site in Needham
BUILDING THE ROOF TRUSSES ON-SITE
As Mike explained, it was crucial that we hit all the marks we needed to with this roof—it’s an uncommon pitch and steeper than average. And when we place these trusses, we need to make sure they hit the exterior wall perfectly—we want to avoid having to mess around with fascias and soffits and rework things. These trusses are doubled up—super beefy—to meet the structural engineer’s request. So, collectively the decision was made to build the trusses on-site—we felt this was the ideal way to yield the best result. Building on-site may take more effort than getting premanufactured trusses delivered, but sometimes it just comes down to having more control over the product and how we intend to install it.
VENTING THE ROOF
We’re building this roof to create airflow—allowing air to travel from the vented soffits all the way up and out through the ridge. Although you often see spray foam being used in these projects, we actively avoid it—we find better and healthier options for air sealing, such as the ROCKWOOL stone wool batt insulation, which we are using in the entire roof. But because we don’t have a vapor control there, we need to ventilate the air up and out to the ridge vent.
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