Billows Electrical Supply


Delran, NJ

Existing Condition:

The existing roof is a smooth surface built-up roof over polyisocyanurate insulation. There are 17 old skylights and 37 unused penetrations that are causing numerous leaks throughout the building. The roof surface has been repaired many times over the years, but no one was ever able to completely stop all of the leaks due to the overall poor condition of the roof.

Size of Roof:

104,464 sqft

Scope of Work:

All of the unused penetrations were removed and new steel decking and insulation was installed. The existing skylight domes were removed and the curbs were framed shut and encapsulated with new TPO membrane. A Carlisle “Sure-Weld” 115mil Fleeceback TPO Roof System was installed directly over the built-up roof.


The owner was issued a 20 year NDL warranty from Carlisle.

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