What built-up roofing means for a property owner

Built-up roofing uses multiple layers. When requesting work, find out what existing assembly is present and which details the scope needs to address.

If you have earlier work records, use them to confirm the assembly and the roof areas involved. Ask how the proposed work will address existing layers, roof edges and drainage details.

Talk with Dekoven Roofing about which materials and installation options may fit your roof.

A layered roof

Built-up roofing is made of several layers assembled on site over the deck and insulation, then finished with a surface layer. It has been used on low-slope buildings for a long time, and many existing roofs are still this type.

What it means for an owner

Several layers add redundancy, but each layer must stay sealed.
The surface layer protects the layers below from sun and weather.
Flashing and edges are the usual trouble spots.

Inspecting an existing built-up roof

Blisters and splits.
Exposed layers or bare spots.
Ponding areas.
Flashing condition.
Signs of wet insulation.

Repair, recover or replace

Depending on condition, a roofer may recommend repairs, a recover system or full replacement. Ask for the reasoning, what each option includes and what existing layers would remain.