Case Studies

E X E C U T I O N    D E S C R I P T I O N  

Waterproofing of flat concrete slabs in the new execution of Hotel Catalonia, located in L'Hospitalet de Llobregat, Barcelona for the formation of flat roofs of the building, situated in intermediate level, roof gardens and planters  built by galvanized metal sheet on the intermediate zone between the two blocks of the main building. It was waterproofed approximately 7,000 m2  by the polyurea 100% pure TECNOCOAT P-2049  continuous membrane  on reinforced concrete flat slabs and galvanized sheet. 

Planter’s body of galvanised metal sheet                                         Planter; superior view

Planter’s base sprayed by tecnocoat P 2049                                              Primer on planter’s base

M E T H O D   of    A P P L I C A T I O N  

The procedure followed in this application is as follows:  

First step:  support preparation

• Milling of the surface:  surfacing of the concrete slab, to obtain a high adhesion of the system and reducing at zero the accumulation of air and therefore the appearance of bubbles or craters in the surface once the membrane is applied. 
• General Cleaning: removing with vacuum of dust, dirt and other material (oil,grease,paint…ect) generated during earlier work and that may prevent optimal adhesion to the substrate. 

Second step: singular points 

They are the elements as dilatation joints, encounters with walls, drains or other specific and singular points of the structure and surfaces. They require focused work to ensure proper system operation. In this case, the work was done in the following points: 

• Realization of half-cylinder mortar: in this application, it was important to ensure continuity of the waterproofing system Tecnocoat P-2049 in all encounters of the zones with vertical walls, and get good support for vertical membrane. Thus, a perfect continuity is ensured on the sharp points, which in the long term because of possible movements of the structure, which can damage the membrane. 
• This work was done on the intersections with the walls, skylights and other existing elements. In this way the membrane Tecnocoat P-2049 requires no assembly or reinforcement extra systems. 
• Preparation of existing joints: joints on existing slabs and perimeter walls were prepared using our Desmopol PU elastic sealant (mastic), to achieve a perfect flexibility and prevent breakage due during possible excessive movement of the concrete structure.. 

Third step: Tecnocoat P-2049 application

The Tecnocoat P-2049 system used on this project is constituted by: 

• Primer Tecnocoat Primer PU: applied with a roller over the entire surface, improves the adhesion of the existing support and avoid the presence of trapped air. 
• Membrane  Tecnocoat P-2049: Tecnocoat polyurea membrane 100% pure, continuous and fully bonded to the support, is applied by spraying equipment as graco E-XP2, by an instantly control of mixture, temperature and pressure of the liquid components. It is applied directly on the primer, in many continuous layers until the thickness required by our document ETA 11/0357. 

A P P L I C A T I O N    A D V A N T A G E S

The factors favoring the application of the waterproofing and coating system Tecnocoat P-2049, and not to use other systems were as follows:  

• Waterproofing of encounters with perimeter walls, as in the galvanized planters, large covering and coating of all surfaces and fixtures. 
• Fast execution compared with other systems, which due to the frequency of rainfall in the area, make the P-2049 Tecnocoat system ideal for preventing slippage of work. 
• Complete continuity of waterproofing membrane on all surfaces and forms without joints or overlaps use. 
• High resistance to abrasion and punching, which ensures the tightness in cases like on roof gardens.   
• Secure and safety - the tightness of the green roof, with a high protection due to compliance with the load capacity to support specified in the ETA. 
• Similarly, their qualification for use on roofs with S1-S4 classification of slope (inclination), as evidenced by ETA 11/0357