But long-term roof performance often depends just as much on the system underneath.
A properly selected and correctly installed underlay can help provide
- secondary moisture protection,
- resistance to wind-driven rain,
- temporary weather protection during installation,
- condensation control,
- and improved overall roof durability.
Today, some premium architectural shingle systems are available with manufacturer warranties of up to 55 years when combined with:
- correct ventilation,
- quality underlay systems,
- proper detailing,
- and correct installation practices.
Like most roofing systems, long-term performance is rarely about a single product alone — it’s about how the entire roof assembly works together.
The covering is only one part of the roof assembly.