Roof Deck Drainage Design

Proper waterproofing for a roof deck involves installing an epdm membrane and flashing around deck.

Roof deck drainage design.

The most basic requirement for proper plaza deck design is proper slope to drain provided by the structural slab. It might be easier to re frame a sloped surface to drain to a suitable roof edge. For smaller surfaces gravity drainage systems are the ideal solution. Rooftop metal deck idea.

For larger roofs siphonic drainage systems should be installed. One gully can drain at least 150 m2. A rooftop garden with wooden deck and central glass floor adds a lush twist to your roof top deck. Smith carefully designs and manufactures a full line of roof drains deck drains scupper drains promenade and parking area drains and more to satisfy both the artistic eye of the architect and the calculating mind of the engineer.

One of our readers rune eriksen sent us photos of his design for a home built deck drainage system and we were impressed enough to check it out. Double your outdoor living space with an under deck drainage system. Planters with foliage plants along the modified parapet improve the look of the deck. If the deck is a steel deck appropriate roof substrate sheathing i e gypsum based boards plywood may be secured to the metal deck and the fully reinforced rubberized asphalt membrane applied to the surface.

Unfortunately adding tapered insulation to re pitch a roof deck costs about as much as the rest of a re roof job. Trex rainescape under deck drainage system. Aco offers functional solutions which are specially designed for flat roof areas and which ensure the water is drained effectively. Convert the space under a second story deck into a dry spacious patio by installing this simple under the deck roof and gutter system.

The trough and downspout design drains water away from your deck allowing you to create a dry patio or storage area on the ground level below. Building offsets are common and create intersecting planes that contribute to drainage issues for low slope applications. Flat roofs are prone to leaking even without decks because of design errors improper materials and improper installation. Many times when roof decks are installed they further damage roofs causing more severe leaking and drainage problems.

Design professionals frequently specify the minimum code permitted slope with little if any consideration of the resultant valley slope created by the intersecting planes figure 1 ponding water is commonly observed at valley intersections for low slope roof and deck. Our exclusive dual functional structural deck flange and combination roof drains streamline specifications saving installation time and labor.