A rake edge is an important component of a roofing system, typically required in many building codes and recommended for durability. Whether it is required depends on local building codes, roofing material manufacturer specifications, and climate considerations.
What is a Rake Edge?
A rake edge is the metal flashing or trim installed along the sloped edges (rakes) of a roof. It helps protect the roof deck from wind-driven rain, ice, and general weather exposure.
Is a Rake Edge Required?
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Building Code Requirements
- Many local codes (such as the International Residential Code - IRC) require a rake edge or drip edge for asphalt shingle roofs.
- For example, IRC Section R905.2.8.5 (2018 & later versions) requires a drip edge along eaves and rakes for asphalt shingles.
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Manufacturer Requirements
- Most shingle manufacturers (like GAF, CertainTeed, and Owens Corning) require a rake/drip edge for warranty compliance.
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Climate Considerations
- In areas with high winds, snow, or heavy rain, a rake edge is essential to prevent water infiltration and shingle lifting.
- Cold climates with ice damming issues especially benefit from rake edges combined with ice and water shield membranes.
Consequences of Not Having a Rake Edge
- Water penetration at the roof’s edges
- Premature deterioration of decking and fascia
- Wind damage to shingles
- Possible voiding of roofing material warranties
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