When water pools on a flat roof, it can cause problems such as popped nails, pulled away flashing, exposed railheads and the washing away of stone or gravel from the shingles. These could cause the roof to leak and it can severely damage the roof deck, the underlying structure and your interior finishing. If water leaks through the roof, it could also cause electric and fire hazards. This is not a good news and I’d recommend you proofer  an immediate solution or better still, hire an expert roofing contractor who will advice on which of the below steps will be best fitting for your situation.roofing contractor

The following are some flat roof drainage solutions available so as to avoid these problems.

Internal Drains

These drains are affordable drainage solution option that can tie into existing home drain systems. These include the installation of copper or aluminum inserts into the areas of the roof where water usually pools. Plumbing systems are usually attached to the drain inserts in order to guide the water outside the building through a sidewall. There should be pipes running down an inside wall and then hung under the roof decking through the rafters. This system must be installed by a licensed plumber for it to be effective.

Scupper Drains

These are  economical drain system which can be installed in low edge areas so as to reduce water pooling. They are galvanized drains that are attached to the roof edges, they work by guiding water from the roof edges down to the water downspouts.

Eavestrough Drainage

Though,  this is not commonly used anymore, it is a good option, if you have a commercial or an older large industrial flat roof. With this kind of drainage, drainage ditches are made in the roof in the lower insulated areas. The created ditches will guide water toward the eavestroughs.

Drainage Helpers

This is a great option if you already have a good flat roof drain system but you want to provide the ability to move more water for your system if need be. Drainage helpers work by recessing insulation in the installed drains in order to allow for faster water drainage.

Step Sloped Insulation

This is a more affordable way to slope a flat roof. Step sloped insulation involves the installation of several layers of flat board insulation under the roof membrane in place of cutting  a custom-made roof board. The roof board is installed in steps with the thinnest boards at the drains and around the drains. The roof membrane is now installed over the step sloped insulation.