Repair & Renovation Guide 89 You should know that even if you installed waterproofed clay roof tiles, the waterproofing lasts up to a maximum of eight years. Repair and restoration of structure roofing components (detached and/or cracked clay roof tiles, detachment in contact with walls, chimneys, etc.) EARTHQUAKE: CLAY TILED ROOFS special subjects The effect of an earthquake is possible to cause less or more damage on the clay tiled roof of a building, as well as in its connections with adjacent structure elements (e.g., walls, roof valleys, chimneys, etc.). After checking the damages they have occurs, re-adhere the detached elements of the roof and replace the cracked or broken clay roof tiles with new ones, using the powerful binding mortar especially made for this purpose, PERLAFIX (p. 262). Clay roofing tiles that are on the roof ridges or in other parts of it and in need to be re-adhered, should ideally be reinstalled using the powerful bonding mortar especially made for this purpose PERLAFIX (p. 262) as well. If a traditional mortar is used, it should be reinforced with special improving additives {DUROMAX (p. 251), D-20 (p. 233), DUROSTOP (p. 252) or improving polymer resin in powder form RESIN POWDER (p. 266)} and the polypropylene fibers DUROFIBRE (p. 248). Next, waterproof the adhesive with the brushable cementitious waterproofing mortar D-9 (p. 239) or the two-component cementitious flexible sealant and adhesive DUROFLEX POWDER (p. 249). To avoid frost damage to clay roof tiles (the moisture that penetrates them when it freezes causes their cracking and breaking), we necessarily make sure to waterproof them with either D-59 (p. 237) or NANO PROOF CERAMIC DS- 270 (p. 262), after all the repairs are completed. At all the points of contact of the clay tiled roof with other structure elements (walls, chimneys, roof valleys, etc.) that may have been detached due to the earthquake, make sure to repair the damage with the cementitious repair mortar of high specifications D-55 (p. 237) and then apply the two-component cementitious flexible sealant and adhesive DUROFLEX POWDER (p. 249).
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