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How to Install Under-Deck Drainage Systems

Video

Video presentation describing how to install water-resistant under-deck drainage systems to protect roofs and homes during high wind and moisture disaster events.

A molded plastic drainage board rainscreen allows vertical drainage while providing uniform support for the siding and resisting compression from screws and nails.

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Stucco is installed over rigid insulation, which is installed over a drainage plane consisting of a drainage gap and building wrap layer over the sheathing

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This building foundation has a drainage layer located on the exterior of the waterproofing membrane.

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Moisture Management in Residential Construction Series - Stone Veneer Internal Drainage Plane

Video

Video from Home Innovation Research Labs on installing a stone veneer exterior with an internal drainage plane to protect the home from moisture issues.

The sheathing has rotted because there was not a sufficient drainage gap behind the stucco cladding

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Improving Drainage and Drying Features in Certain Conditions: Rain Screen Design for Absorptive Cladding

Reference

Guide detailing best practices on how to build wall assemblies with absorptive claddings such as brick, stone that drain and dry well.

Traditional methods of site drainage, such as site grading, can be difficult to achieve on urban sites.

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A common method of addressing significant groundwater leakage in the foundation is to line the interior perimeter of the foundation with a drainage layer.

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Standard Specification for Manufactured Polymeric Drainage and Ventilation Materials Used to Provide a Rainscreen Function, ASTM E2925–19a

Reference

Specification describing criteria for manufactured polymeric materials used to provide a rainscreen function, a means for the drainage of liquid moisture and the ventilation of vapor moisture that enters an above-grade exterior wall assembly which was published in the year 2019, and is available for...

Right - This cedar siding is installed over furring strips which allow an air and drainage gap behind the siding.

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A common method of addressing significant groundwater leakage in the foundation is to line the entire foundation assembly, including the slab, with a drainage layer.

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A plastic fiber drainage mat rainscreen provides uniform support for the siding and allows moisture to flow horizontally and diagonally in addition to vertically.

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Right - The service penetration in the waterproofing membrane is well-sealed, and there is a drainage mat acting as a protective layer on the interior of the soldier piles and wood lagging.

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A continuous drainage mat rainscreen made from vacuum-molded plastic provides uniform support for the siding and allows moisture to flow horizontally and diagonally in addition to vertically.

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A liquid-applied water barrier covers the walls, serving as a drainage plane, air and vapor barrier, and secondary window flashing beneath the rigid foam that will be installed next.

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The builder installed a rain screen product that provides an air gap and drainage plane between the coated OSB sheathing and the cladding; the fabric layer folded over the bottom edge forms an insect screen.

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Below-Grade Water Management for Urban Sites

Guide

Guide describing methods to manage groundwater under and around urban multifamily buildings.

Stone Exterior Installation for Durability and Water Management

Video

Video describing how to properly install exterior stone on a house by providing a drainage plane to prevent moisture from infiltrating the wall assembly.

Temporary dry floodproofing wall design concepts

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Moisture Management in Residential Construction Series - Building Enclosure: Foundation Overview

Video

Video from Home Innovation Research Labs providing recommendations for constructing foundations that direct water away from the structure, focusing on site grading, damp proofing, and foundation drainage.

Rainscreens: A Builder’s Experience

Presentation

Webinar from Peter Barrett of Dorken Systems Inc. and Chris Donatelli of Donatelli Builders discussing how rainscreens work to add drainage and drying capacity to residential walls, using a real-life example from a retrofit home in Chicago. Free EEBA login required.

Rain Screen Acknowledgement Form

Reference

An example of a form a building codes department created to ensure builders are fully aware and have taken steps to provide drainage so that water doesn’t accumulate behind siding. This example is from the city of Newberg, Oregon.

Nashville's Home Inspector reveals clogged "Weep Holes"

Video

Video showing how the weep holes in a brick façade are sometimes filled by the homeowner or subsequent contractor who mistakenly thought the holes are the result of an installation error during the brick laying work. These holes are important to the drainage and ventilation of the wall, please don’t...

How to Install Under-Deck Drainage Systems

A molded plastic drainage board rainscreen allows vertical drainage while providing uniform support for the siding and resisting compression from screws and nails.

Stucco is installed over rigid insulation, which is installed over a drainage plane consisting of a drainage gap and building wrap layer over the sheathing

This building foundation has a drainage layer located on the exterior of the waterproofing membrane.

Moisture Management in Residential Construction Series - Stone Veneer Internal Drainage Plane

The sheathing has rotted because there was not a sufficient drainage gap behind the stucco cladding

Improving Drainage and Drying Features in Certain Conditions: Rain Screen Design for Absorptive Cladding

Traditional methods of site drainage, such as site grading, can be difficult to achieve on urban sites.

A common method of addressing significant groundwater leakage in the foundation is to line the interior perimeter of the foundation with a drainage layer.

Standard Specification for Manufactured Polymeric Drainage and Ventilation Materials Used to Provide a Rainscreen Function, ASTM E2925–19a

Right - This cedar siding is installed over furring strips which allow an air and drainage gap behind the siding.

A common method of addressing significant groundwater leakage in the foundation is to line the entire foundation assembly, including the slab, with a drainage layer.

A plastic fiber drainage mat rainscreen provides uniform support for the siding and allows moisture to flow horizontally and diagonally in addition to vertically.

Right - The service penetration in the waterproofing membrane is well-sealed, and there is a drainage mat acting as a protective layer on the interior of the soldier piles and wood lagging.

A continuous drainage mat rainscreen made from vacuum-molded plastic provides uniform support for the siding and allows moisture to flow horizontally and diagonally in addition to vertically.

A liquid-applied water barrier covers the walls, serving as a drainage plane, air and vapor barrier, and secondary window flashing beneath the rigid foam that will be installed next.

The builder installed a rain screen product that provides an air gap and drainage plane between the coated OSB sheathing and the cladding; the fabric layer folded over the bottom edge forms an insect screen.

Below-Grade Water Management for Urban Sites

Stone Exterior Installation for Durability and Water Management

Temporary dry floodproofing wall design concepts

Moisture Management in Residential Construction Series - Building Enclosure: Foundation Overview

Rainscreens: A Builder’s Experience

Rain Screen Acknowledgement Form

Nashville's Home Inspector reveals clogged "Weep Holes"

Final Grade Slopes Away from Foundation

Pre-Retrofit Assessment of Crawlspaces and Basements

Water Management of Existing Crawlspace Floor

Air Sealed, Insulated Basements

Pre-Retrofit Assessment of Walls, Windows, and Doors

Vinyl Siding with Integrated Rigid Foam for Existing Walls