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  • The Problem: This plant was constructed with precast concrete "channel slab" deck panels laid on steel framing. The deck panels are clipped and can move and shift, creating an unstable roofing substrate.

  • Our Solution: After tearing-off the existing roofing, including careful interior monitoring and protection of the assembly lines below, the deck panel joints were resealed with roof cement and fabric. A one-ply base sheet/temporary roof was then applied in hot asphalt, serving two functions:
    • The one-ply helps to "bridge" over the differences in panel elevation to create a more uniform, level surface over which to apply the insulation boards.
    • The one-ply also served to minimize the effect of the panel movement on the insulation boards of the new built-up roof system. Increasing the R-Value of the new roof system insulation also reduced panel movement.

  • The Problem: The original flashing system at building expansion joints were not designed to withstand the abuse caused by contractors and maintenance personnel trafficing over the expansion joints.

  • Our Solution: The new roof flashing system at the expansion joints incorporated two-ply modified bitumen flashings. Expansion joint covers were designed with hinged, wood plank protection rails over the sheet metal expansion joint covers. Steel-grated ramps were also included to make it easier to drag equipment over the expansion joints.

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