Gable roofs

Two planes meeting at a ridge, with a triangular wall at each end. The shape we see most across Johnson County, and the cheapest to re-roof.

Typical pitch: 4:12 to 9:12 typical
How often we see it: Very common

Pitch ranges are trade convention, not code. Code sets minimum slope by material, not by roof shape.

Is this your roof?

Stand at the front of the house. If you see a triangle of siding or brick rising to a point under the roof edge, that is the gable end.
The ridge runs the full length of the house rather than stopping short of the ends.
A simple gable has only two roof planes, and gutters on only two sides.

In Johnson County

The gable end is a large flat face for wind to push against, and straight-line wind events are routine here. Wind tunnel work found a hip roof cut worst-case peak suction by up to half compared with a gable, but that was measured at 4:12 and the advantage narrows as pitch increases. In practice the installation matters more than the shape: a gable whose rake edges were properly started and whose ridge caps are purpose-made outperforms a hip roof finished with field shingles cut down for the ridge.

What you can put on it

Slope decides this before preference does. Set yours and see what the code allows, then check the notes for this shape.

Drag to change the slope

0:126:1212:12

6:12about 27° from horizontal

Conventional

Every common material is in play

Shingles, metal, tile or shake, each still subject to its own manufacturer minimum. Walkable for a roofer, standard labor rate, and where most Kansas City homes sit. This range is trade convention rather than a code band.

Trade convention, not code

At this slope

Asphalt shingles
Standing seam metal
TPO / EPDM membrane
Modified bitumen
Wood shake
Tile

Membrane drops out at 4:12 and above because nobody specifies it there, not because the code forbids it. Shake and tile carry manufacturer minimums of their own, so treat these as a starting point rather than an approval.

Asphalt shingles

Works well

The standard choice here. A gable at 4:12 or steeper sits inside the published slope range for common shingle products, though the manufacturer's own instructions always govern.

Standing seam metal

Works well

Long uninterrupted runs from ridge to eave with no hips to cut around, so a gable is the cheapest shape to do in metal.

Wood shake

Workable

Historically common, but check the HOA rules and ask your insurer in writing how the policy treats wood roofing before choosing it.

What we check first

The failure points specific to this shape, marked on the roof and listed in the order a roofer looks at them.

Rake edges, first and always. If the starter course was skipped, the rake is where wind gets under the shingles.
Ridge cap condition, and whether the caps are purpose-made or cut from field shingles.
The gable end vent, if there is one, and whether it is being used as intake alongside a ridge vent, because that combination short-circuits attic airflow.
Valley metal wherever a dormer or wing intersects.

What moves the price

Square footage is a poor predictor on its own. These are the things that actually change the number on this shape.

Fewest cut shingles of any shape, because a simple gable has no hips and often no valleys.
Two runs of gutter instead of four.
Rake edge length drives drip edge and starter course quantity, so a long narrow gable costs more per square than a square one.
Any dormer or intersecting wing turns a simple gable into a cross gable and adds valleys, which is where the price moves.

Get this roof inspected Roof repair Roof replacement Storm damage

Common questions

Is a gable roof bad in high wind?

Not inherently, but it is less forgiving of a bad installation than a hip roof. The gable end presents a large flat face to the wind and the rake edge is the first thing to lift if the starter course was skipped. A correctly started and fastened gable performs well in Kansas wind; in the failures we get called to, installation quality is usually the deciding factor rather than shape.

What pitch is a typical gable roof in Johnson County?

Most sit between 4:12 and 9:12. That is a trade observation rather than a code requirement, as no code defines a pitch range by roof shape. What code does regulate is minimum slope by material: under the 2018 IRC, section R905.2.2, asphalt shingles require at least 2:12.

Is a gable roof cheaper to replace than a hip roof?

Usually yes, for the same square footage. A simple gable has no hips to cut around and often no valleys, so there is far less shingle waste and less labor. The gap closes quickly once dormers or an intersecting wing are added.

More answers on the roofing questions page, or see every roof shape side by side.