Roofs With Internal Gutters

This type is great for larger buildings and those that naturally pool at the center of the building.

Roofs with internal gutters.

The common gutter lining is either a hot mop built up roofing a torch down membrane or a pvc tpo single ply. Internal gutters must be continuously supported on timber boards treated to h1 2 or on ply treated to h3. Internal or within roof area gutters also known as box gutters can cause significant inconvenience damage and repair cost if water from the gutter gets into the building structure below. There must be no fixings in the bottom or sides of the gutter.

Metal lined gutters must have welded cross joints and a strip of roof underlay between the metal and the timber or ply. Often the outlet to the valley gutter discharged over a small portion of roof before being contained by the eaves gutter figure 7. Breaking down the pros and cons of flat roof drains. Internal gutter construction gutter construction varied from a simple shallow trough or v like a valley detail to a tapered valley laid over firred framing to give a fall figures 5 and 6.

External downspouts mounted to collect water flowing from rooftop scuppers. Scuppers are simple to install from a. 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.