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The “down” and “out” approach to flashing – metal flashing directs water down and out of building assemblies

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Elevated slab construction with no water sensitive materials on first level

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Saturated ground water

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Material Properties of Rigid foam Insulation

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Install all layers of the drainage plane to overlap, not underlap, to direct bulk water down and out of the wall.

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Comprehensive water management features include a capillary break (≥ 6-mil polyethylene sheeting) at all crawlspace floors

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Rigid foam insulation can serve as the drainage plane when all seams are taped. Furring strips provide an air gap behind the cladding.

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Low-Slope ("Flat") Roofs

Guide

A guide describing how to install low-sloped ("flat") roofs with insulation above the roof deck that resist wind pressures during high-wind events.

Disaster-Resistant Roof Venting

Guide

Guide describing the installation of roof vents that are resistant to damage from high winds and entry of wind-borne rain, wildfire embers, or pests.

Flooding Overview

Information Guide

Overview guide describing residential floodproofing steps.

Flashing of Penetrations in Existing Roofs

Guide

Guide describing how to provide a continuous water control layer across the roof assembly by sealing all penetrations for pipes, vents, etc. in existing roofs.