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This roofing shall consist of four layers or piles of coal-tar saturated rag felt cemented together with coal-tar pitch and surfaced with slag, gravel, or similar surfacing materials, as called for in the proposal for the work. Flashings of the type required under the specification for the building shall be included and shall conform to United States government master specification for flashings no.156 or 157.
This roofing shall consist of five layers or piles of coal-tar saturated rag felt cemented together with coal-tar pitch and surfaced with slag, gravel, or similar surfacing materials, as called for in the proposal for the work. Flashings of the type required under the specification for the building shall be included and shall conform to United States government master specification for flashings no.156 or 157.
This roofing shall consist of five layers or piles of coal-tar saturated rag felt cemented together with coal-tar pitch and surfaced with slag, gravel, or similar surfacing materials, as called for in the proposal for the work. Flashings of the type required under the specification for the building shall be included and shall conform to United States government master specification for flashings no.156 or 157.