Deck Membrain For Gutter

With one of these systems installed you re free to lay a patio under the deck which will give you a lovely retreat during inclement weather.

Deck membrain for gutter.

Consisting of a membrane installed under the decking the system collects and channels water into a perimeter gutter system and away from the building. At the edges of a deck membranes need to be adequately turned up behind wall or balustrade claddings and turned down over the deck edge or into internal gutters and drainage scuppers. The area beneath the deck is kept dry and can be used for storage or with enough headroom a covered patio. Epdm membrane for the water to drain towards the gutter the epdm membrane has to droop between the joists to create a trough that slopes down the length of the joists to the gutter.

After flashing against the house you roll a membrane across the tops of two joists to create a long trough that s pitched to drain at the front of the deck into a gutter and downspout system. Uses a network of troughs and gutters to divert water from the deck shields the area below the deck from rain snow sun and other elements provides 100 protection of the deck substructure from moisture holds screws in place longer. The trex rainescape deck waterproofing system shown below is an example of a membrane and downspout system. And you will a need a metal or plastic gutter at the outer edge of the deck inside the band joist to catch the water from the troughs.

A piece of material stapled on the inside of the band joist in each joist bay is also a good idea to protect the band joist from water and to direct water into the gutter. If your deck is on an upper level consider installing a dry under deck system which directs rainwater out to the deck s perimeter and into gutters. At the head of the joist bays usually at the ledger i allow for a 1 to 1 1 2 inch deep trough. Deck membranes and downspouts the dominant solution for waterproofing areas below decks is to drape plastic membranes within joist spaces below decking to form troughs.

Adjacent rolls of membrane lap at the tops of the joists and are capped with more membrane or peel and stick tape. Browse materials for this project on amazon.