Roofs With Internal Gutters

External downspouts mounted to collect water flowing from rooftop scuppers.

Roofs with internal gutters.

The internal gutter system is made up of a gutter lining material a metal drop scupper and a fascia board that has been installed more than two inches above the roof deck. Scuppers are simple to install from a. Breaking down the pros and cons of flat roof drains. There must be no fixings in the bottom or sides of the gutter.

Internal drains some commercial roofs have drains like the drain in a shower. A drain at the top with a trap to catch debris connects to the internal water system where pipes drain it internally through the building. The built up and torch down roofing will last about as long as the average twenty year steep slope roof and the pvc tpo liners if installed correctly could last as long as the thirty year steep slope roof. This type is great for larger buildings and those that naturally pool at the center of the building.

Metal lined gutters must have welded cross joints and a strip of roof underlay between the metal and the timber or ply. Internal gutters must be continuously supported on timber boards treated to h1 2 or on ply treated to h3. Often the outlet to the valley gutter discharged over a small portion of roof before being contained by the eaves gutter figure 7.