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Peter D’Antonio, who oversees tunnel gross sales for Sika Sarnafil, notes, “Proper waterproofing of tunnels is one of the crucial value-efficient methods to extend the helpful life of those structures and improve security. Water seeping right into a construction endangers the building supplies through the freeze-thaw cycle, with water freezing inside cracks and inflicting them to enlarge.

A roofing contractor will be able to perform an infrared survey to learn how much, if any, of the insulation, is saturated. If 25% or much less of your roof’s insulation is saturated, it may be removed and patched with new, dry insulation. Anything over 25% normally warrants a full roof replacement; your trusted roofing contractor can suggest the most effective route when evaluating your insulation.

Crystalline-enhanced shotcrete is especially useful for remedial waterproofing in bored tunnels, as it may be applied to the destructive (inside) face. The Washington D.C. Metro System used crystalline merchandise from Xypex to repair extreme leakage issues in a number of miles of tunnels, in addition to passageways, mechanical rooms, tools vaults, elevator shafts and passenger stations. In this case, the waterproofing was utilized as a slurry coat over the defective concrete.