If your roof deck is large enough you want to create slope drainage from two sides toward the middle.
Roof deck drainage.
Roof drains from zurn include combination primary overflow control flow dual outlet siphonic retrofit and more which cater from educational to commercial needs.
Trex rainescape under deck drainage 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.
Some general rules about roof deck drainage.
If you want to get the most bang for your buck consider installing a deck drainage system.
Since its founding in 1900 as the hydromechanics division the zurn specification drainage operation has been a leading producer of roof drains deck drains and floor drains for the commercial industrial and institutional building construction industry.
All the zurn products are engineered and manufactured to meet all ansi standards.
First mark all the purlin locations on the deck joists.
A deck drainage system creates a dry usable space underneath your second story deck and protects your deck substructure from moisture which can lead to wood rot and decay.
Double your outdoor living space with an under deck drainage system.
To provide drainage the panels should slope toward the outside edge of the deck about 1 4 in.
Depending on the size of the roof deck you will want it to drain toward the middle or to the edges.
Building a deck is an investment in your home.
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.
If the span under your deck is 12 ft for example the purlin at the outer end of the deck should be 3 in.