What Is Hip Roof? Function and Role in Roofing Systems

In plain English

A hip is the external angle formed by the intersection of two sloping roof planes that meet at a ridge, running from the roof’s eave to its peak. It serves as a structural line where adjacent roof sections join, typically requiring specialized hip shingles or coverings.

How hip works

Hip refers to the external angle formed by the intersection of two sloping roof planes that meet at a line running from the eaves to the ridge. In roof geometry, a hip is a prominent structural feature found on hip roofs, where all sides slope downward toward the walls, typically at a consistent roof pitch. The hip itself is the diagonal line, or hip rafter, that supports the junction of these slopes, providing a continuous edge from the ridge to the eaves.

Functionally, hips play a critical role in distributing structural loads and enhancing the roof’s ability to shed water and snow efficiently. The sloped design of hip roofs, with multiple hips, improves wind resistance by reducing exposed gable ends and allowing wind to flow over the structure more smoothly. This geometry also contributes to the roof’s structural efficiency, as the intersecting slopes provide additional bracing and stability.

Hips are commonly used in residential and commercial construction where durability, weather performance, and architectural aesthetics are priorities. They are especially advantageous in regions with high winds or heavy precipitation, as the intersecting slopes and hips facilitate rapid drainage and minimize the risk of water infiltration at roof intersections.

Why it matters for your roof

Hips are an important architectural feature of hipped roofs, and they can be found on a variety of different building styles, including traditional homes, cottages, and bungalows. It also affects how homeowners, contractors, and specifiers evaluate roof durability, cost, risk, and long-term value.

Common problems

HIP FLASHING FAILURE

Improperly installed or deteriorated hip flashing allows water intrusion at the hip intersection, leading to leaks and substrate damage.

SHINGLE LIFTING AT HIP

Inadequate fastening or poor alignment of hip shingles increases vulnerability to wind uplift and shingle displacement along the hip line.

FASTENER CORROSION

Exposure of fasteners at the hip due to poor coverage or material incompatibility accelerates corrosion and weakens the hip assembly.

HIP UNDERLAYMENT GAPS

Gaps or misalignment in underlayment at the hip create a critical entry point for moisture, resulting in hidden water damage.

Where you'll see it

WATER SHEDDING TRANSITION

A hip directs water away from the roof intersection, reducing pooling and minimizing leak risks at sloped roof corners.

RIDGE INTEGRATION POINT

Hips serve as critical connection lines where adjacent roof slopes meet, requiring specialized hip caps or shingles for weatherproofing.

STRUCTURAL LOAD DISTRIBUTION

The hip provides added structural support at roof corners, helping distribute loads and resist wind uplift at vulnerable intersections.

VENTILATION PATHWAY

Hips can accommodate specialized hip vents, enhancing attic ventilation where traditional ridge vents are not feasible due to roof geometry.

Don't confuse it with

Not to be confused with roof pitch, attic framing, or other roof style names that describe different geometry.

• hip vs ridge
• hip vs valley
• hip vs gable
• hip vs dormer

Regional & climate notes

Most relevant in: Rain-heavy climates, Snow-heavy climates, High-wind climates.

Related terms

• Hip Roof
• Hip and valley roof
• Hip Legs
• Valley
• Cross hipped
• Jerkinhead roof