What is the minimum recommended slope for asphalt shingles to be used?

The minimum recommended slope for asphalt shingles is typically 3/12. This means that for every 12 horizontal inches, the roof rises at least 3 inches. A slope of 3/12 is essential because it provides adequate drainage for rainfall and prevents water from pooling on the roof surface, which can lead to leaks, material degradation, and premature failure of the roofing system. Following this guideline helps ensure the longevity and effectiveness of the asphalt shingles, making them perform well in various weather conditions.

While lower slopes may still be used with special underlayments or additional waterproofing measures, the standard recommendation emphasizes the importance of maintaining a minimum slope to ensure proper water shedding and roof performance.