80 Repair & Renovation Guide In the case that after an earthquake we notice cracks in a crosswise pattern or at an angle in the horizontal plane in the coating of the wall, then, in order to be sure of the effectiveness of the repair and restoration actions, but mainly for safety reasons, and before proceeding with any operation, we should consult an engineer on the subject. However, in most cases, the opening of cracks is very likely to reveal breakage or cracking of the structure element (brick, aircrete, concrete, etc.). In those cases, the damage should be repaired first, by removing the broken elements and replacing them with new ones using suitable building mortars, such as: D-31 for brick (p. 234), D-10 for aircrete (p. 231). Repairing cracks in concrete elements, as well as broken parts, are handled on a case-by-case basis, depending on the severity of the damage. In some cases, concrete cracks can be filled by resin injections, following specific application procedures {D-33 (p. 235) & D-38 (p. 235)}. Crushed concrete must be restored using specially reinforced cement mortars designed for similar tasks: D-55 (p. 237), DUROFIX (p. 248), DS-240 (p. 243), DS-244 POWER MORTAR RESIN (p. 243) or DS-245 POWER MORTAR RAPID (p. 244). Next, apply a new coating: D-40 (p. 236) & D-41 (p. 236) or the water repellent one coat plaster D-42 ONE COAT (p. 236), by encasing in its mass the fiberglass mesh for plaster reinforcement DS-1090 (p. 242). Finally, proceed with the priming and painting of the surface using a paint of your choice from the wide range of DUROSTICK paints. If it is desired to achieve, in addition to crack-proofing, sound proofing, waterproofing, thermal and vibration protection, after the stages of the scratch the base coat, we apply the multipurpose paste dB BLOCK (p. 240) and complete the application, as described on page 77 of this of the manual. Inspection, repair and restoration of large cracks in coatings at an angle or crosswise, indicative of broken wall(s) EARTHQUAKE: RENDERS & PLASTERS special subjects
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