Hip Roof: Design, Wind Performance, and Cost vs Gable

By The Roofing Brief Team. Last reviewed: October 2026.

A hip roof is a roof that slopes down to the eaves on all four sides, so it has no vertical gable end walls; on a rectangle the four planes meet at a ridge, and on a square they meet at a single peak (a pyramid hip). Wind-tunnel studies summarized by the U.S. Department of Energy’s Building America Solution Center (PNNL) found peak wind pressures up to 50% lower on a hip roof than on a comparable gable, and Florida’s wind mitigation form gives a separate roof-geometry rating to a hip whose non-hip features are no more than 10% of the roof perimeter. The trade-off is cost: on the same footprint and pitch, a hip carries about twice the hip-and-ridge cap footage, 60% more eave and gutter length, and more complex framing than a gable.

The Short Answer: Hip vs Gable Decision

The gable versus hip decision comes down to three measurable items: what the extra cap, edge and framing footage costs on your plan, how much wind pressure the roof must resist at your design wind speed (the ultimate design wind speed in mph that your building department takes from the ASCE 7 maps), and which architectural style the house needs.

If your situation is	Lean toward	Threshold or rule that decides it
Florida home, windstorm premium is a large share of the policy	Full hip	Non-hip features 10% or less of total roof perimeter on OIR-B1-1802 to rate as “Hip Roof”
Hurricane-prone coast, existing gable you are keeping	Brace the gable ends	Horizontal bracing at each gable end wall stud taller than 3 ft (PNNL / FORTIFIED guidance)
Inland, tight budget, attic storage wanted	Gable	Same squares of covering, but about half the cap footage and no hip framing
Low-pitch hip (under 4:12) with shingles	Hip allowed, with double underlayment	IRC R905.2.2: 2:12 minimum; 2:12 to under 4:12 needs two layers of underlayment
Pitch below 2:12	Standing seam or membrane, not shingles	Standing seam allowed to 1/4:12 per IRC R905.10.2
Hip or valley rafters framed at under 3:12	Engineered beams	IRC R802.4.4: hips, valleys and ridges must be designed as beams
L- or T-shaped plan	Cross hip, budget for valleys	Each valley adds flashing footage and a leak line

If you are in a non-hurricane zone with a tight construction budget, the gable usually wins on cost: on the 50 by 30 ft worked example below it needs 52 ft of ridge cap against 116 ft of hip and ridge cap, and 104 ft of eave instead of 168 ft. If you are in a hurricane zone (Florida, Texas Gulf Coast, the Carolinas, Louisiana), the hip’s lower wind pressures and Florida’s hip rating on form OIR-B1-1802 usually justify the extra footage. If the architectural style demands hip (French Provincial, Italianate, Prairie), the hip is required for visual integrity.

The hip roof also defines several architectural traditions. The pyramid hip is iconic in French country and Italianate construction. The simple hip with deep overhangs defines the Frank Lloyd Wright Prairie style. The cross-hip massing is core to American Foursquare residential. Our comparison of hip roof styles sets these shapes side by side.

Hip Roof Anatomy

The hip roof has four named structural lines that any owner should recognize.

Ridge. The horizontal line at the top, where the two long slopes meet; on a rectangle its length equals building length minus building width (52 minus 32 = 20 ft on our example plan). A pyramid hip has no ridge.

Hips. The four (or more) sloping lines that run from the corners of the building up to the ridge. Under IRC R802.4.3, hip rafters must be at least 2 in nominal thickness, no shallower than the cut end of the jack rafters, and braced at the ridge to a bearing partition or designed to carry that point load.

Eaves. The lower edges of all four sloped sides, where the roof meets the exterior walls. Hip roof eaves wrap around the entire perimeter (168 ft on a 52 by 32 ft roof plan), unlike gable eaves, which run along two sides only (104 ft).

Valleys. Only present on cross-hip roofs, where two hip sections intersect. A simple hip has no valleys.

The continuous eave perimeter and the absence of vertical gable end walls drive everything else about the hip roof (168 ft of eave against 104 ft on a 50 by 30 ft gable house): lower wind pressure, more edge and cap footage, ridge-and-soffit ventilation only, and the same eave height on all four elevations. For the complete roof vocabulary, see parts of a roof.

Wind Performance: Why Hip Roofs See Lower Wind Pressure

PNNL’s Building America guide states that “all else being equal, hip roofs experience smaller wind pressures than gable roofs” and that peak pressures can be as much as 50% lower, citing wind-tunnel tests by Meecham (1992) and Shao et al. (2018). Three geometric reasons explain the gap.

The first reason is the absence of gable end walls. A tall gable end is a flat, unbraced triangle of wall that wind can push in or pull out; on a gable roof PNNL’s gable end bracing guide calls for horizontal braces at each gable end wall stud taller than 3 ft. A hip roof has no such wall to brace.

The second reason is the pressure distribution. Wind on a sloped roof creates positive pressure on the windward slope and suction (uplift) on the leeward slope and along the edges. A gable concentrates suction at the rake edges and gable corners; the hip replaces the two rakes (about 72 ft on our example plan) with sloped eaves and hip lines, and the wind-tunnel tests PNNL cites recorded lower peak pressures on the hip form.

The third reason is bracing. A hip roof is self-bracing against racking, as PNNL notes, because the four hip rafters (24 ft each on our 6:12 example) tie each building corner to the ridge. A gable has to carry its end-wall loads through the gable framing and its bracing back to the wall below, which is why the FORTIFIED program uses a dedicated gable end bracing compliance form.

Florida’s code and rating system reflect the same physics without mandating hips: the Uniform Mitigation Verification Inspection Form, OIR-B1-1802, adopted by Rule 69O-170.0155 F.A.C., records roof geometry as Hip, Flat or Other, and insurers apply their filed credits to that answer. Wind loads themselves come from ASCE 7 (ASCE 7-16 in the 2018 and 2021 IRC), so in a high-wind zone ask the designer for the design wind speed and the uplift values used for the hip and corner zones.

The Hurricane-Zone Insurance Discount

Florida Statutes 627.0629 requires a residential property insurance rate filing to “include actuarially reasonable discounts, credits” for fixtures or construction techniques that reduce windstorm loss. Roof shape is one of the features the insurer rates, and the amount of the credit comes from each insurer’s filed rating plan, not from a statewide table.

The credit is documented on form OIR-B1-1802, question 5 (Roof Geometry) in Rev. 01/12 and question 7 in Rev. 04/26. A wind mitigation inspector measures the total roof system perimeter and the total length of non-hip features. The roof rates as “Hip Roof” only if no other roof shapes exceed 10% of that perimeter; everything else rates as “Other Roof” (or “Flat Roof” on buildings of 5 or more units with 90% of the area under 2:12). Porch and carport roofs attached only to the fascia or wall over unenclosed space are excluded from the measurement.

Roof measured on OIR-B1-1802	Non-hip share of perimeter	Roof geometry box checked
Simple hip, 168 ft perimeter, no gables	0%	A. Hip Roof
Hip with one 14 ft gable dormer face on a 168 ft perimeter	8.3%	A. Hip Roof
Hip with two 14 ft gable bump-outs on a 168 ft perimeter	16.7%	C. Other Roof
Dutch gable (gablet on a hip) or half-hip	Depends on measured gable length	A only if gable length is 10% or less
Full gable house	100%	C. Other Roof

The bump-out rows are illustrations of the 10% arithmetic, not inspection results. PNNL’s guide, citing a 2013 estimate by Colucci, puts hip-roof insurance discounts at roughly $100 to $800 a year; your figure depends on your windstorm premium and your insurer’s filed credit, so ask for a quote with and without the hip rating before you pay for a conversion. The credit structure in Texas, Louisiana, the Carolinas and Alabama runs through different programs (such as FORTIFIED designations), and our gable vs hip roof insurance page covers that math. See best roof for hurricane for the cross-state breakdown.

Cost Premium vs Gable: Where the Extra Dollars Come From

On the same footprint, overhang and pitch, a hip and a gable need the same number of squares of field covering, because roof area equals plan area times the pitch factor (1.118 at 6:12) whatever the shape. The hip premium comes from three line items instead: hip and ridge cap footage, longer eave edge (drip edge, starter, ice barrier and gutters), and hip and jack rafter framing.

Worked example: 50 x 30 ft house, 1 ft overhangs (52 x 32 ft roof plan), 6:12 pitch	Gable	Simple hip	How it is calculated
Field roof area	1,860 sq ft (18.6 squares)	1,860 sq ft (18.6 squares)	1,664 sq ft plan x 1.118 pitch factor
Ridge length	52 ft	20 ft	Hip ridge = 52 minus 32 ft
Hip lines	0	4 x 24 ft = 96 ft	16 ft common run x 1.5 (18 in per ft at 6:12)
Hip and ridge cap to buy	52 ft = 3 bundles	116 ft = 5 bundles	GAF Seal-A-Ridge: 4 bundles cover about 100 ft
Eave length (gutters, starter, ice barrier)	104 ft	168 ft	Gable: 2 x 52; hip: 2 x 52 + 2 x 32
Rake edge	4 x 17.9 = 71.6 ft	0	16 ft run x 1.118
Gable end wall to side and brace	2 x 112.5 = 225 sq ft	0	Triangle: 30 ft wide x 7.5 ft rise / 2

Price the delta by asking the roofer for the per-foot rate on hip and ridge cap, drip edge and gutters, plus the framer’s or truss supplier’s hip package price; those four numbers, applied to the footage above, give your actual premium. GAF’s Seal-A-Ridge data sheet lists 4 bundles for about 100 lineal feet, so the 64 extra feet of cap on this hip is 2 extra bundles. Published guides disagree on the overall percentage, so treat any single “hip costs X% more” figure as a rough guide rather than a quote.

Covering on a hip roof	Installed cost per sq ft (2026)	Field area cost, 18.6-square example	Hip-specific add-ons to price
Architectural asphalt shingles	$5 to $8	$9,300 to $14,880	Hip and ridge cap bundles, 168 ft drip edge and starter
Class 4 impact shingle	$8 to $13	$14,880 to $24,180	Impact-rated cap (for example Seal-A-Ridge AS)
Standing seam metal	$10 to $18	$18,600 to $33,480	Formed hip caps and closures; each panel cut on the hip
Concrete tile	$7 to $19	$13,020 to $35,340	Hip tiles, hip starters, mortar or dry-hip system
Natural slate	$15 to $30	$27,900 to $55,800	Hand-cut hip slates or copper hip roll
Cedar shake	$10 to $18	$18,600 to $33,480	Pre-built hip and ridge units

Per-square-foot ranges come from our 2026 roofing cost report; the 18.6-square column is that range multiplied by 1,860 sq ft. Outside hurricane states the hip premium has no insurance offset. For broader pricing context, see how much does a new roof cost.

Variants: Simple Hip, Pyramid Hip, Cross Hip, Half-Hip

The hip roof has four primary variants, defined by the geometry of the four slopes.

Simple hip. Two long trapezoid slopes and two triangular end slopes meeting at a horizontal ridge whose length is building length minus building width (20 ft on a 52 by 32 ft roof plan). It has the fewest valleys (zero) and the shortest cap run of any full hip on a rectangle.

Pyramid hip. All four slopes meet at a single central peak; the ridge length is zero because the footprint is square; on a 32 by 32 ft plan at 6:12 each of the four hips runs 24 ft to the peak. It is the signature of French country and Italianate architecture and the standard small-pavilion roof.

Cross hip. Two simple hips intersect at right angles, creating valleys where the two hip sections meet. The cross hip is the standard configuration for L-shaped or T-shaped homes; an L adds one valley and a T adds two, each needing valley flashing per IRC R905.2.8.2 on a shingle roof.

Half-hip (jerkinhead, clipped gable). A gable with a small hip section at the peak. It is technically a gable variant, and on form OIR-B1-1802 the remaining gable length counts as a non-hip feature, so most half-hips rate as “Other Roof”. The half-hip is common on Dutch Colonial and some Tudor variants.

Variant	Best application	Valleys	OIR-B1-1802 geometry (Florida)
Simple hip	Rectangular homes, hurricane zones	0	Hip Roof
Pyramid hip	Square pavilions, French country	0	Hip Roof
Cross hip	L-shaped or T-shaped footprints	1 or more	Hip Roof if non-hip features are 10% or less of perimeter
Half-hip	Dutch Colonial, Tudor accent	0	Usually Other Roof (gable length counts as non-hip)

Hip Roof Framing Complexity

Hip roof framing is more complex than gable framing in three specific ways, all covered in IRC Chapter 8 (2021 IRC, Roof-Ceiling Construction).

The first complexity is the hip rafter. Hip rafters run diagonally from the building corners to the ridge, so their plan run is 1.414 times the common run. At 6:12 a framing square gives 18 in of hip length per foot of common run against 13.42 in for a common rafter, so the hip is about 1.34 times as long as the common rafter it serves (24 ft against 17.9 ft on our example). IRC R802.4.3 sets the minimum: 2 in nominal thickness and no shallower than the cut end of the jack rafters.

The second complexity is the jack rafter system. The hip slopes are framed with jack rafters that shorten by a fixed amount at each spacing: at 6:12 and 16 in on center, each jack is 17.89 in shorter than its neighbor (16 in x 1.118). Every jack also needs a compound cheek cut where it lands on the hip.

The third complexity is the connections. IRC R802.4.4 requires ridges, hips and valleys to be designed as beams where the roof pitch is under 3:12, and R802.11 requires rafter or truss uplift connections sized for the design wind speed. In high-wind zones those hip-to-ridge and corner connections use engineered hardware rated for the calculated uplift.

Truss-built hip roofs move the geometry to the truss designer: a hip set uses a girder truss, stepped-down hip trusses and jack trusses, and IRC R802.10 requires truss design drawings for it. See roof trusses for the engineering side of hip truss design.

Low-Pitch Hip Roofs: Minimum Slopes by Covering

A low pitch hip roof is limited by its covering, not by its shape. These are the IRC Chapter 9 minimums (2021 IRC, Roof Assemblies); local amendments can be stricter.

Covering	Minimum slope	Extra requirement at low slope	IRC section
Asphalt shingles	2:12	Two layers of underlayment from 2:12 to under 4:12	R905.2.2
Clay and concrete tile	2-1/2:12	Two layers of underlayment from 2-1/2:12 to under 4:12	R905.3.2, R905.3.3
Metal panels, lapped, no sealant	3:12	1/2:12 with applied lap sealant	R905.10.2
Standing seam metal	1/4:12	Maker’s low-slope seam detail	R905.10.2
Wood shakes	4:12	Interlaid felt	R905.8.2
Slate	4:12	Underlayment per R905.1.1	R905.6.2

A hip framed at 3:12 with shingles is code-compliant with double underlayment, but at under 3:12 the hip rafters themselves fall under the beam-design rule in IRC R802.4.4, which usually means a stamped design.

Material Best-Pairings

Hip roofs accept every standard residential covering; the hip adds cap pieces and cut waste at each hip line rather than ruling out a material. The pairing turns on minimum slope (from 1/4:12 for standing seam to 4:12 for slate, table above), wind or hail rating, and style.

Material	Hip suitability	Best application
Architectural asphalt shingles	Excellent	Mainstream residential, all climates
Impact-rated asphalt	Excellent	Hail belt and hurricane zones
Standing seam metal	Very good	Premium residential, snow country
Metal shingle (interlocking)	Excellent	Hip-compatible alternative to standing seam
Concrete tile	Excellent	Florida, California, Southwest hip homes
Clay tile (Spanish, Mission)	Excellent	Mediterranean and Spanish Colonial
Cedar shake	Good	Northeast and Pacific Northwest
Slate	Excellent	Historic restoration and premium custom

The one detail to flag is the hip cap. Standard architectural shingles do not include hip and ridge pieces; they are ordered separately, such as GAF Seal-A-Ridge at about 25 ft per bundle, and a simple hip on a 52 by 32 ft plan needs 116 ft of cap against 52 ft on the gable. See metal vs asphalt shingle roof for the material decision framework.

Snow Country Considerations

For snow, ASCE 7 Section 7.6.1 treats hip and gable roofs together: both must be checked for unbalanced (drifted) snow load, except slopes steeper than 7:12 or flatter than 1/2:12. The hip’s advantage in snow country is the same as in wind: no tall gable end wall and four bearing eaves.

Drift loading is the one area where hip roofs need design attention. The leeward hip planes and the hip rafters pick up the unbalanced load, and where the pitch is under 3:12 the hips must be designed as beams under IRC R802.4.4. In high ground-snow areas, ask the designer which ground snow load (psf) from the local jurisdiction’s table the hip rafter or girder truss was sized for.

Ice damming on hip roofs works the same way as on gables, but the ice barrier runs farther. IRC R905.1.2 requires ice and water shield from the eave to at least 24 in inside the exterior wall line where the jurisdiction requires it, and on a hip that applies to all 168 ft of eave in our example rather than 104 ft; proper attic ventilation and ceiling air sealing do the rest.

Ventilation Strategy for Hip Roofs

Hip roofs are ventilated with a ridge-and-soffit system. There is no gable end for a gable vent, so the ridge-and-soffit combination sized under IRC R806.2 (or roof-mounted exhaust vents near the top of each hip plane) is the practical attic ventilation strategy for a hip roof.

The continuous ridge vent runs along the top of the roof. A simple hip has a short ridge (20 ft on our 52 by 32 ft example, against 52 ft on a gable), so exhaust area is limited; hip-line exhaust vents or box vents within 3 ft of the ridge can make up the difference. A pyramid hip with no ridge needs a peak vent or box vents.

The soffit vent system is the air intake, and the hip’s 168 ft of eave gives far more intake length than a gable’s 104 ft. IRC R806.2 requires 1 sq ft of net free area per 150 sq ft of attic floor, or 1 per 300 when 40% to 50% of the required area is in upper vents no more than 3 ft below the ridge and the rest is at the eaves (or when a Class I or II vapor retarder is installed in Climate Zones 6 to 8). A 1,500 sq ft attic at 1/300 needs 5 sq ft (720 sq in) of net free area: 288 to 360 sq in up high and the rest at the soffits.

For the complete ventilation breakdown, see attic ventilation.

Hip + Dormers: The Architectural Option

Hip roofs can accommodate dormers, though the geometry is more complicated than dormers on a gable. The standard hip dormer is a small gable-roofed projection set into one of the four hip slopes (usually one of the two 52 ft long slopes on our example plan), similar in principle to a dormer on a mansard.

The dormer has to sit between hip rafters rather than cross them, and on the 52 by 32 ft example each triangular end slope is only 32 ft wide at the eave and narrows to a point, so dormers usually go on the two long slopes. In Florida, a gable-front dormer face counts toward the non-hip footage on form OIR-B1-1802.

An alternative is the hip-roofed dormer, where the dormer itself has a hip roof rather than a gable. The hip dormer keeps every roof edge a hip or eave, so it adds no gable footage to the OIR-B1-1802 measurement, at the cost of two extra hip lines and two small valleys per dormer.

Cost-Benefit in Storm Zones

In hurricane zones the hip’s case rests on two documented effects: lower peak wind pressures (up to 50% in the tests PNNL cites) and the “Hip Roof” rating on OIR-B1-1802 that insurers price under Florida Statutes 627.0629. Use this worksheet with your own quotes rather than a generic payback claim.

Item	Gable on 52 x 32 ft plan	Hip on 52 x 32 ft plan	Where the number comes from
Field covering	18.6 squares	18.6 squares	Same plan and pitch
Extra hip and ridge cap	baseline	+64 ft (+2 bundles)	GAF Seal-A-Ridge coverage
Extra eave edge and gutter	baseline	+64 ft	168 minus 104 ft
Rake edge and gable bracing	71.6 ft rake, 2 gable walls	0	Saved on the hip
Annual windstorm credit	Other Roof rate	Hip Roof rate	Your insurer’s filed rating plan
Simple payback	Hip premium from your quote / annual credit from your insurer		Worked: a $3,000 premium recovered by a $600 annual credit = 5 years

The payback row is an illustration of the arithmetic, not a forecast; PNNL’s cited range of $100 to $800 a year means the same $3,000 premium could take anywhere from about 4 to 30 years to recover. See best roof for hurricane for the full storm-zone analysis.

Hip in Modern 2026 Architecture

The hip roof remains relevant in modern residential architecture for three reasons.

Modern Prairie and Ranch. The Frank Lloyd Wright Prairie tradition, which peaked in American residential architecture between about 1900 and 1920, has had ongoing revivals. The signature deep-eaved, low-pitch hip with horizontal emphasis is still specified in custom residential work.

Modern Mediterranean. The Florida, California, and Southwest Mediterranean style relies on a low-pitch hip with red clay or concrete tile, which IRC R905.3.2 allows down to 2-1/2:12 with double underlayment below 4:12.

Modern Tropical. Caribbean and Hawaiian residential architecture uses a hip roof with deep overhangs for shade and wind resistance. The style has been adopted in coastal Florida and Texas Gulf Coast resort residential.

Builders in Florida have a direct reason to offer hip plans: a buyer’s wind mitigation inspection on form OIR-B1-1802 rates a full hip differently from a gable, and that rating follows the house at every policy renewal.

Hip Roof Maintenance Realities

Hip roofs carry more cap and edge footage than gables, so they have more places to check. The annual maintenance items include:

Inspect hip ridge caps. On our example plan there are 116 ft of hip and ridge cap against 52 ft on a gable, and cap shingles take wind from more directions than field shingles. A yearly look from the ground with binoculars, and after any storm with gusts above the shingle’s rated wind speed, catches lifted caps early.

Clear the full gutter system. The continuous perimeter eave on a hip means gutters wrap the house: 168 ft on a 52 by 32 ft plan against 104 ft on the gable, about 1.6 times as long. Clean at least once a year, more under trees. See gutter installation cost for replacement budgeting.

Inspect valleys (on cross-hip roofs only). The valleys at the intersections of cross-hip sections are the highest-leak-risk points on the roof. Check that the valley flashing (at least 24 in wide when it is metal, per IRC R905.2.8.2) is clear of debris and that cut shingles are not lifting.

Verify ridge vent and soffit vent function. The hip relies on ridge-and-soffit ventilation, and blocked soffits (often from blown insulation without baffles) or a clogged ridge vent cut the net free area that IRC R806.2 sizes at 1/150 or 1/300 of the attic floor.

For the contractor selection question that drives Florida roof installation, see how to choose a roofing contractor.

Insurance Premium Savings: Real Numbers

The numbers you can verify are the inputs, not a statewide average. Florida Statutes 627.0629 requires each insurer’s rate filing to include wind mitigation credits; form OIR-B1-1802 records whether your roof is “Hip Roof” (non-hip features 10% or less of the perimeter), “Flat Roof” or “Other Roof”; and PNNL’s guide cites a 2013 estimate of $100 to $800 a year for hip-roof discounts.

Step	What to get	Where
1. Measure	Total roof perimeter and non-hip feature length	Wind mitigation inspector, form OIR-B1-1802 (Rev. 04/26 is the current version)
2. Check the 10% line	Non-hip length / perimeter, 10% or less	Example: 14 ft of gable on 168 ft = 8.3%, qualifies
3. Price the credit	Premium with Hip Roof vs Other Roof	Your insurer or agent, from the filed rating plan
4. Price the premium	Hip cap, edge, gutter and framing line items	Roofer and framer quotes, using the footage table above
5. Divide	Step 4 dollars / step 3 annual dollars	Years to payback

The credit is larger in absolute dollars where the windstorm portion of the premium is larger, which in Florida usually means coastal counties and the High-Velocity Hurricane Zone (Miami-Dade and Broward). Request a fresh form if your current one predates any roof change, since a new gable bump-out can push the non-hip share over 10%.