GreeN roofing Waterproofing systems with SINTOFOIL TpO/Fpa membranes synthetic waterproofing systems
Recently, green roofing systems have been attracting increasing interest because of the significant contribution they can make to environmental compensation, particularly in areas where construction makes permanent changes in the landscape. Green roofs help reduce stormwater runoff because of these systems ability to retain and gradually release rain water. With this publication, IMPER ITALIA presents a number of green roofing approaches based on the latest generation TPO/FPA thermoplastic olefin and flexible polypropylene waterproofing membranes in the RUBBERFUSE Division s Sintofoil range. The solutions presented here are suggestions that can be modified or implemented with the assistance of our Technical Services, who will be happy to provide specific designs on request. Also available on request is the Sintofoil Dataquad program, a guided expert system for designing waterproof roofing installations with Sintofoil synthetic membranes. With Sintofoil Dataquad, users can develop their own custom green roofing designs and print AUTOCAD detail drawings. GreeN roofing Environmental compatibility Green both in color and nature, Sintofoil is ideal for intensive green roofing applications because of its elastomerized polyolefin-based chemical composition. TPO thermoplastic olefin, in fact, ensures total recyclability and total environmental compatibility: the basic technopolymers in Sintofoil membranes consist entirely of molecules of carbon and hydrogen atoms. That means that there are no pollutants such as chlorine, lead and other heavy metals, and no plasticizers. Root resistance Sintofoil is certified to Germany s stringent FLL standards, which require a full two years of testing at the certification agency. BBA certification All Sintofoil versions are certified by the major institutes in Europe and the rest of the world. Recently, for example, Sintofoil s British Board of Agrément approval (No. 97/3422) was renewed after extensive laboratory testing on samples taken from roofing installations that have been in service in several European countries for over 10 years demonstrated that Sintofoil s life expectancy exceeds 30 years. 2
Green roofing classification (UNI 11235) CLASS 1 (extensive) CLASS 2 (semi intensive) CLASS 3 (intensive) Growing medium thickness 80-150 mm 150-250 mm > 250 mm Plant type Sedum, low growing perennials, large perennials, small low growing shrubs, groundcover and grasses Small shrubs Large shrubs and small trees, size III trees, size II trees, size I trees Maintenance level Low maintenance 3 days per year for 1000 m 2 roofs Medium maintenance 4 to 12 days per year for 1000 m 2 roofs High maintenance > 12 days per year for 1000 m 2 roofs The three levels of maintenance are defined as follows: Low maintenance (extensive system) Drawing 1 Maintenance operations are limited to inspecting roofing system components. For the plant layer in particular, inspection should monitor the health of the vegetation, checking for any parasites and infestations that could jeopardize the system s effectiveness. Watering may be required occasionally to keep the plants alive in extreme drought conditions. In general, a 1000 m 2 roof can be expected to require approximately 3 days of maintenance per year. Medium and high maintenance (semi intensive systems and intensive systems) Drawings 2 and 3 In addition to inspecting roofing system components and the plant layer as for extensive system, maintenance will also include the normal trimming, weeding and cultivation needed to keep the plants healthy. Equipment such as sharp tools or cultivation machinery that is not appropriate for the type of roofing must not be used. Irrigation is required to maintain system performance, and must be specially designed. Each intensive green roof will involve a certain level of maintenance in terms of the amount of water, labor and energy in general that it requires, and which will be influenced by all of the factors specific to the context, site and roofing system, as well as by architectural features and type of landscaping. In general, a 1000 m 2 semi intensive green roof can be expected to require from 4 to 12 days of maintenance per year. 3
Extensive green roofing Drawing 1 1. Structural support 2. Pitch slab 3. Compartmentalization 4. DRENO FELT PP 500 leveling layer 5. SINTOFOIL ST sealing layer 6. DRENO FELT PP 200 protection layer 7. Protection and drainage layer 8. DRENO FELT PP 200 filter layer 9. Growing medium, thickness 80-150 mm 10. Extensive greenery 4
Semi intensive green roofing Drawing 2 1. Structural support 2. Pitch slab 3. Compartmentalization 4. DRENO FELT PP 500 leveling layer 5. SINTOFOIL ST sealing layer 6. DRENO FELT PP 200 protection layer 7. Protection and drainage layer 8. DRENO FELT PP 200 filter layer 9. Growing medium, thickness 150-250 mm 10. Semi intensive greene 5
Intensive green roofing Drawing 3 1. Structural support 2. Pitch slab 3. Compartmentalization 4. DRENO FELT PP 500 leveling layer 5. SINTOFOIL ST sealing layer 6. DRENO FELT PP 200 protection layer 7. Protection and drainage layer 8. DRENO FELT PP 200 filter layer 9. Growing medium, thickness >250 mm 10. Intensive greenery 6
Filter layer he filter layer prevents fine particles from the growing medium from reaching the drainage layer and clogging it over time. Our filter layer consists of 100% isotactic polypropylene nonwoven needled and hot-calendered DRENO FELT PP 200 geotextile. Protection and drainage layer Protection and drainage functions can be performed by a single preformed panel or by several different products meeting the necessary requirements. Sealing layer SINTOFOIL ST synthetic waterproofing membrane produced by coextruding a uniform UV resistant thermoplastic olefin and flexible polypropylene alloy with FLL root resistance certification, minimum thickness 1.5 mm. Leveling layer Our leveling layer and substrate for the subsequent sealing layer consists of 100% isotactic polypropylene nonwoven needled and hot-calendered DRENO FELT PP 200 geotextile. Compartmentalization Where the waterproofing membrane is not fully bonded to the substrate, it is advisable to provide some form of compartmentalization below the waterproof sealing layer. Compartmentalization divides the area to be sealed into sections with surface area varying from 100 to 300 m 2 so that the source of any leakage can be readily identified and repaired. Note (UNI 11235): It is advisable to use concrete slabs for mechanical protection in situations: mechanical damage to the sealing element may occur during construction as a result of medium- and high- intensity impact with equipment, scaffolding, etc.; it is expected that maintenance work will be performed by personnel without special training. However, the use of concrete slabs entail a heavy load on the roof and make it impossible to repair the sealing element readily, as the latter cannot be reached without demolishing the slab. Where a concrete slab is used, it must be poured on top of a sepa separation layer. 7
SINTOFOIL ST SpecIFIcaTIONS (1) STANDARD UNIT OF measure Standard thickness (2) EN 1849-2 mm 1.5 1.8 2 Standard roll dimensions (3) EN 1848-2 m 2.10 x 25; 1.5 x 30 Standard color (4) gray Tensile properties - Tensile strength, L/T EN 12311-2 N/mm 2 16/15 - Ultimate elongation, L/T EN 12311-2 % 700/700 Cold flexibility (5) EN 495/5 C 40 Dimensional stability EN 1107-2 % 0.5 Tear resistance, L/T EN 12310/1 N 450/400 550/500 650/600 Puncture resistance Static indentation EN 12730/B L25 Puncture resistance Dynamic indentation EN 12691/B 1000 Watertightness (60 kpa) EN 1928 absolute Root resistance (FLL) passes test (1) Other versions in the SINTOFOIL can also be used. (2) 1.8-2 mm thicknesses available on request. (3) 1.5x30 m rolls available on request. (4) Color of exposed face. Lower face is black to serve as a signal layer. Exposed face is available in other colors on request. (5) Not tested at lower temperatures. dreno FeLT pp STANDARD UNIT OF measure PP 200 PP 500 Density EN ISO 9864 g/m 2 200 500 Standard roll dimensions m 50x2 50x2 Standard color white white Tensile strength, L/T EN ISO 10319 kn/m 7/7.5 16/17 Ultimate elongation EN ISO 10319 % 65/65 70/70 BS OHSAS 18001 : 2007 IMPER ITALIA S.p.A. member of the GBC Italy 9001 : 2008 synthetic waterproofing systems DIVISIONE RUBBERFUSE Via Volta, 9 10071 Mappano Borgaro (Torino) Italy tel. +39 011 222 54 99 fax +39 011 262 51 87 e-mail: combu2@imper.it IMPER ITALIA S.p.A. Via Volta, 8 10071 Mappano Borgaro (Torino) Italy 01-10-1000