Repair & Renovation Guide 161 The first step is to identify the problem. The easiest way to accomplish that is by letting water from a garden hose fall onto the waterproofed surface from a height of about 1m. You will notice that the sound will change once the water hits the detached/ hollow spots. Once you locate the damaged spots/ areas remove the detached material using a razor blade or a sharp knife. Clean the substrate well and apply one of the following waterproofing elastomeric products: DS-220 (p. 243), No39 (p. 280), HYDROSTOPPU (p. 258), or TECHNOPROOF (p. 270) of DUROSTICK. Make sure that the new coat is applied at least 10cm over and wider than the existing waterproofing coat. Spot detachment of elastomeric waterproofer The damage can be the result of poor construction, attack from moisture (rising or from another source), impact damage from falling objects, or other cause. To restore it, thoroughly clean the surface, remove any loose sections, lightly soak the spot and then repair with one of the fortified repair mortars, D-55 (p. 237) or DUROFIX (p. 248). Note: When dealing with industrial floor damage, it is recommended to repair it with the epoxy putty D-38 (p. 235) or with the rapid set repair mortar DS-247 (p. 244). a. Small detachments or even deterioration on a cement floor b. Bumps and scratches When performing a routine check on the (cementitious) waterproofing coat of the roof, it is possible, for various reasons, to discover spots with hairline cracks. The problem must be dealt with immediately to avoid penetration of destructive moisture to the substrates. Once the appropriate preparations are completed, recoat the damaged area with one of the elastomeric waterproofing products: No39 (p. 280), DS-220 (p. 243), HYDROSTOP-PU (p. 258) or TECHNOPROOF (p. 270) of DUROSTICK. Make sure that the new coat is applied at least 10cm over and wider than the existing waterproofing coat. Small cracks on cementitious waterproofing coats Small damage on floors Small damages on waterproofed surfaces
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