84 Repair & Renovation Guide Although less common, damage that can be caused by an earthquake is likely to affect the interior or exterior (roof, balcony) floors of a building. Speaking of floors in which there are various types and kinds of linings, it is possible to observe cracks and detachments on a larger or a smaller scale. As for the linings of vertical structural elements and wall surfaces in general, it is always good to seek the opinion of an expert who will evaluate the damage and decide if it has gone deeper than that of the lining (checking a surface may require the removal of some of its elements). In such a case, it may be advisable to remove part or all of the lining, repair the substrate (usually the concrete slab). Continue by reinstalling the existing (salvaged) or new lining materials by applying - or not - a coat of cement screed, if necessary. It is deemed necessary to proceed with the repair of the damage on the entire slab (cracking, detachment, disintegration) before installing the lining or performing any other work on its surface. Cracked and disintegrated (hollow) cement mortars (if any) should be removed and replaced with new as they are considered unsalvageable. The process of installing new floor lining or restoring the existing one requires that the appropriate, beforehand, work has been completed. Such work includes its stabilization and waterproofing (especially if the space is exposed to moisture loads (e.g., bathroom, roof, terrace, etc.). First waterproof with D-1 FLEX (p. 228) or D-1 (p. 228), and continue with the installation by using the appropriate adhesive - ideally a high specifications adhesive product - (Complete range of adhesives for tiles, granite, marble, stone etc. of DUROSTICK), proceed with grouting by using the appropriate, per case, product {CEMENTITIOUS (p. 275), D-4 for stones (p. 235), epoxy grout DUROPOXY (p. 251), FLEXIBLE & OIL REPELLENT GROUT (p. 278)}. Complete the work by waterproofing any cementitious grout by using D-16 HYDROSTOP (p. 232) or even waterproof the entire surface, if the lining material is absorbent. Use D-22 for marble and granite (p. 233), D-29 SPOT FREE (p. 234) or NANO PROOF MARMO DS-275 (p. 262) for tiles, granite and marble. Waterproof and protect stone surfaces with RENOLIT (p. 266) or NANO PROOF CERAMIC DS-270 (p. 262). In case that the damage to the lining was not found to be extensive, and did not advance beyond the lining of the slab, then, just remove the damaged elements, replace them with new ones, which should be installed with the appropriate DUROSTICK adhesive, depending on the lining material: DUROSTICK Νο37 (p. 279), D-5 (p. 236) for stone, or some other high-quality adhesive from DUROSTICK. Grout the repaired surface with the appropriate grout and, ideally, waterproof the surface (depending on the type of lining, as mentioned before). NOTE: On exterior surfaces, the creation of expansion joints on the perimeter and per 16-20m2 of surface, is absolutely necessary. Repair and restoration for linings/finishes (stone, tile, marble), on floors, for both interior and exterior use EARTHQUAKE: LININGS special subjects
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