Skip to main content
Back to Glossary
Roofingaka: eave lineaka: roof overhang

Eave

In Plain English

The lower edge of a roof that overhangs the wall — where gutters are typically attached.

Definition

The lower edge of a roof that projects beyond the exterior wall, directing rainwater away from the foundation. Eaves can be open (exposed rafter tails), boxed (enclosed soffit), or clipped (minimal projection). In cold climates, eaves are vulnerable to ice dams; proper insulation and ventilation prevent warm air from melting snow at the roof surface and refreezing at the cold eave.

Why It Matters in Bidding

Eave details drive roofing, gutter, soffit, fascia, and ventilation scope, so estimators must read the wall section to know whether they are pricing open, boxed, or clipped construction. The eave is also a warranty-sensitive zone because ice dams and water intrusion frequently start there, meaning the chosen detail affects both labor cost and long-term callback risk.

Example

Pricing a residential reroof, an estimator notices the plans call for boxed eaves with continuous vented soffit and adds ice-and-water shield at the eave line plus baffle installation that the homeowner's original scope had omitted.

Related Terms

SoffitFasciaDrip EdgeIce Dam

Frequently Asked Questions

Open eaves expose rafter tails and need less material but careful finishing, while boxed eaves require soffit, fascia, and trim that add carpentry labor and material. Clipped eaves minimize overhang and cost. The detail also determines gutter mounting, ventilation accessories, and flashing, so each style carries a different labor and material loading.
Heat escaping into the attic melts snow on the warm upper roof; the meltwater runs to the cold, unheated eave overhang and refreezes, building a dam that forces water back under the shingles. Estimators in cold climates often include eave ice-and-water membrane and ventilation work to mitigate this risk.
Eave scope typically includes fascia, soffit, drip edge, gutter and downspout attachment, ventilation baffles or vented soffit, and underlayment or ice-and-water protection along the lower roof edge. Missing any of these in takeoff leaves gaps that surface during construction as change orders or eat into the roofer's margin.

Need more than definitions?

Get AI-powered bid alerts, automated form filling, and proposal drafting.

Start Free Trial

© 2026 ConstructionBids.ai — A LaderaLabs Product