The aim of waterproofing is to allow a support not to be infiltrated by liquids, both in negative thrust (counter-thrust) and in positive thrust, thus preserving the integrity of structures and their content. Moreover, waterproofing contributes to the non-propagation of various types of contaminants on products containing substances.
The main waterproofing products are made up of bentonite compounds, cementitious sheaths, polyurethane resins, PVC, HDPE and LDPE geomembranes, drainage geocomposites, polymer distillate, elastomeric, plastomeric and elastoplastomeric bituminous membranes.
Choosing the right product depends on the correct assessment of the intended use, the chemical and physical nature of the support, its shape, the deformations it is subject to, the characteristics of the material to be used and the working conditions.
It is also of crucial importance to prepare and apply a periodic maintenance plan valid for the entire useful life of the product.
Main standard references
UNI 11333:2009: installing flexible membranes for waterproofing – staff training and qualification.
UNI 11540:2014: guidelines for the preparation and proper implementation of the continuous maintenance plan using flexible waterproofing membranes.
UNI 11345:2010: checking activities during the development, execution and management phases of continuous roofing works.
UNI 9460:2008: discontinuous coverings – instructions for the design, execution and maintenance of roofs made of brick or concrete tiles.
UNI EN 1107-1:2002: flexible membranes for waterproofing – bituminous membranes for roof waterproofing – determination of the dimensional stability.
UNI EN 1107-2:2002: plastic and rubber material membranes for roof waterproofing.
UNI EN 1108:2006: flexible membranes for waterproofing – bituminous membranes for roof waterproofing – determination of shape stability under cyclical temperature variations.