Low slope roofs or “flat” roofs, as they are sometimes called, typically have single-ply membrane or multi-layer “built-up” roof systems. Although one or more manufacturers offer warrantees for membranes installed with no slope, the 2015 IBC (International Building Code) requires…
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Using Continuous Rigid Insulation to Solve a Roof Ice Problem
This Vermont church roof (top photo) suffered from ice build-up, leaks, and giant icicles below the eaves of the relatively new sanctuary roof. The original intent for construction of the sanctuary roof was a ‘dropped’ cathedral ceiling with fiberglass…
Steep Roof Design Basics for Snow Country
Leaks from ponds created by ice dams can frequently be traced to roof design. Roof designs that funnel snow to narrow spaces and narrow eaves are likely to promote the development of ice dams and resulting roof leaks. Roof designs…
A Catch 22 Product Specification
Specifications occasionally include unintended contradictions, and in some instances they are related to schedule. Not long ago, I reviewed a specification for roofing that included a requirement for a particular “ice and water shield” product and allowed no substitutions. The…
