ASM 8.1.1 Eave Protection and Underlayment

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ASM 8.1.1 Eave Protection and Underlayment

Division D - Construction Details

ASM 8.1.1 Eave Protection and Underlayment

Notice to Reader
Images used in a Construction Detail are representative and not prescriptive. Nor are they necessarily drawn to scale. Rather, they are provided to visually convey the requirements of the Standard they represent. Unless otherwise required by the Standard, dimensions, the selection of materials and their application remains the responsibility of the Design Authority.

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ASM Details

ASM 8.1.1 Eave Protection and Underlayment.jpg

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(1) Metal flashing underlayment/separation membrane
required for metal flashings installed on wood substrates.
(2) Metal edge flashing
Installed to manufacturer's printed instructions.
(3) Ice and water protection
One ply of accepted self-adhered modified bituminous membrane.
(4) Underlayment
Proprietary underlayment installed perpendicular to the slope with 50 mm (2") minimum side laps and 100 mm (4") minimum end laps.
  • This application pertains only to slopes 1:3 (4" in 12") or greater. For slopes less than 1:3, see Construction Detail ASM 8.1.2.
  • Slip sheet not shown for clarity


(A) Acceptable deck

NOTE: See the Standard for additional requirements.

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