Tapered Insulation Roof Systems: What are they? How do I specify them and why?

The goal of tapered roof insulation systems is to reduce or eliminate the amount of ponding/standing water on the finished membrane when the roof deck does not provide adequate slope. Draining the water in a timely and efficient manner minimizes the adverse effects that ponding/standing water can have on completed roof membranes. A properly designed tapered roof insulation system, not only provides the positive drainage needed but also helps extend the life of the roof membrane, and provides thermal value as well thus reducing the heating and cooling expenses of the building owner.

Learning Objectives:

1. Identify and understand key terms when designing a tapered system · Panel Repeat, Slope, Cricket
2. Identify specific parameters to include in your tapered system · R value requirements - and how they are achieved · Desired slope vs workable slope · Drainage expectations vs budget
3. Identify building design requirements and which type of tapered insulation is appropriate · 4-way slope vs 2-way slope · Constant perimeter necessary? Advantages and disadvantages · Multi-slope designs
4. Understand what a cricket is and when to use it · Types of crickets · Determining width of crickets · Cricket panel slope vs Cricket valley slope

Education Content: Intermediate

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