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Commercial Roofing Glossary

Commercial Roofing Glossary of Terms:

Retrofit DrainDrain
Retrofit Drain

Retrofit Drain
A drain insert used in reproofing, designed to fit into the plumbing pipe of an existing drain (the back retrofit drain is installed, the front retrofit drain in the hands of the technician).


Sometimes referred to as a drain head, this is the drain installed on flat roofs that allows the water to exit the roof. This is connected to plumbing pipe usually 4 inches in diameter and empties into a drainage system or a drainage area on the ground.

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Showalter Roofing Services, Inc.

25W048 Ramm Drive, Naperville, IL 60564

(630) 499-7700

Fax: 630-499-7007