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Mineral self-protected sheets

Data Sheet Certificates Safety Data Sheet

POLYDAN 50/GP ELAST. GREEN GARDEN is a waterproofing sheet made of SBS modified bitumen mastic. Composed of a non-woven polyester felt reinforcement and finished with green mineral slate on the upper face and a polyethylene film on the lower face. Bitumen is treated with special additives in order to deter root damage.

Tested according to standard EN test methods.

 Technical Data

External fire performanceBroof(t1)-UNE-EN 1187; UNE-EN 13501-5
Reaction to fireE-UNE-EN 11925-2; UNE-EN 13501-1
WatertightnessPasa-UNE-EN 1928
Longitudinal tensile strength900 ± 250N/5cmUNE-EN 12311-1
Transversal tensile strength650 ± 250N/5cmUNE-EN 12311-1
Longitudinal elongation at break45 ±15%UNE-EN 12311-1
Transversal elongation at break45 ±15%UNE-EN 12311-1
Resistance to root penetrationPasa-UNE-EN 13948
Resistance to static loading>20kgUNE-EN 12730
Resistance to impact>1000mmUNE-EN 12691
Longitudinal resistance to tearing (nail shank)PNDNUNE-EN 12310-1
Transversal resistance to tearing (nail shank)PNDNUNE-EN 12310-1
Joint strength: peel resistance PND-UNE-EN 12316-1
Joint strength: shear resistance650 ± 250-UNE-EN 12317-1
Flexibility at low temperature< -15ºCUNE-EN 1109
Humidity resistance factor20.000-UNE-EN 1931
Dangerous substancesPND--
Flexibility at low temperature (pliability) after aging-5 ± 5ºCUNE-EN 1109
Flow resistance at elevated temperature after aging100 ±10ºCUN-EN 1110

Pasa = Positive or correct No pasa = Negative PND = No performance determined - = Not necessary

 Addtitional Technical Data

Mass per unit area (nominal)5.0kg/m²-
Nominal thickness3.5mm-
Flow resistance at elevated temperature>100ºCUN-EN 1110
Dimensional stability at elevated temperature (longitudinal)< 0.5%UNE-EN 1107-1
Dimensional stability at elevated temperature (transversal)< 0.5%UNE-EN 1107-1
Adhesion of granules< 30%UNE-EN 12039

Membranes thickness tolerance: = -0,3 mm, apart from membranes with thickness 2 and 2,4 mm whose tolerance is =-0,2 mm.
Membranes mass per unit area tolerance: -5% (mini) and +10% (maxi) from nominal value.

 Environmental Information

Environmental InformationDeclared ValueUnitsNorm
Pre-consumer Recycled Content0%-
Post-consumer Recycled Content35%-
Manufacturing LocationFontanar, Guadalajara (España)--
Volatile organic compounds (VOCs)50 (A+)*µg/m3ISO 16000-6:2006

* A+ classification according to Decree No. 2011-321 of 23 March 2011 the Ministry French Ecology, Sustainable Development, Transportation and Housing

 Standards and Certification

UNE-EN 13707 standard.
UNE-EN 13969 standard.
CE marking.
DTA 5/15-2436 “Polydan jardin“.


POLYDAN 50/GP ELAST. GREEN GARDEN is a bituminous membrane for use as a top layer membrane in roof waterproofing systems in:
- flat roofs in green roof (extensive planting) specifications, and
- flat roofs in roof garden (intensive planting) specifications.


Roll surface8m2
Rolls per pallet25rolls
Product Code 141215 Green-
  1. slate
  2. SBS modified bitumen
  3. non-woven polyester felt
  4. polyethylene film

 Instruction for use

- Deck surfaces must be dry, clean and free from sharp projections such as nail heads and concrete nibs.
- When bonding the substrate should be prepared using a primer either Impridan 100, Curidan, Maxdan or Maxdan Caucho at the recommended rate prior to installation of the waterproofing system.
- The membrane may be laid in conditions normal to roofing work and must not be laid in rain, snow or heavy fog, nor if the temperature falls below 5ºC, unless precautions against condensation have been taken.
- The roofing layers must always be installed with staggered overlaps and in such a manner that no counter-seams in the direction of the outlets are made.
- Soil or other bulk material should not be stored on one area of the roof prior to installation, to ensure that localized overloading does not occur.
- The first layer of the waterproofing system is installed either fullt bonded, partially bonded or loose-laid.
- Fully bonded torch-applied membranes should only be used with non-combustible substrates and with surfaces designed to enable the torch application of subsequent layers.
- When partially bonded either a layer of GLASDAN 800 P PERFORADO or other suitable venting layer is loose-laid across the substrate edge to edge before applying the first layer.
-In loose laid systems a separating layer is installed over the substrate with overlaps of 100 mm. Then the first layer is loose-laid over the separation layer.

- The POLYDAN 50/GP ELAST. GREEN GARDEN is laid over the first layer in the same direction, and fully bonded. The top layer is installed with side laps a minimum of 60 mm and end laps 100 mm wide.
- Laps between the membrane and any base sheets should be offset by a minimum of 300 mm.
- Bonding is achieved by melting the lower surface by torching and pressing the membrane down. Care must be taken not to overheat the membrane.
- It is imperative that the drainage system of the green roof or roof garden is designed correctly, and provision is made for access for maintenance purposes. Inspection of the drains should be carried out regularly to avoid waterlogging of the garden and the subsequent increase in dead weight load.
- Where there is a run-off from a large sill or gully onto the roof surface, the build-up of silt may allow the germination of seeds, therefore this type of detail should be avoided. Any growth occurring will be restricted and will not normally affect the performance of the roof and will be no worse than that occurring on normal flat roofs.

 Indications and Important Recommendations

- The design of the roof should be considered in relation to its compatibility with the building as a whole, and account taken of the significance of materials which may be included for other reasons.
- The roof covering, including joints, parapets, abutments, gutters and outlets, should remain weathertight under the external action of rain, snow, ice, dead and imposed loads, wind loads, solar and night radiation, and the internal environment of the building.
- Falls should be provided to enable the roof to drain towards outlets, gulleys or gutters of sufficient capacity. Gutters and roof drainage should be designed appropriately.
- As failures in flat roofs are often caused by the harmful effects of moisture which is trapped during construction, it is essential that great care be taken to minimize such risks. Trapped water may be the result of the use of wet materials, water from in-situ concrete and wet screeds, or rain on unprotected construction.
- Be careful about damage from the limited foot traffic associated with installation and maintenance operations. Reasonable care should be taken to avoid sharp objects or concentrated loads. Where regular traffic is envisaged, ie maintenance of lift equipment, a walkway should be provided.
- In the event of damage the membrane must be repaired as soon as possible with a patch of the membrane torch-bonded over the damaged area.
- It is possible that some localized loss of the mineral surfacing may occur on exposed areas of the membrane after some years particularly at complex detailing.
- Roofs should be inspected annually in autumn after leaf fall and in the spring to ensure vegetation and other debris are cleared from the roof and drainage outlets cleared..
- Differential movement between the waterproofing membrane and the substrate, or any overlaid insulation in inverted roofs, or other material should be taken into account in design. If necessary, movement joints should be made in the waterproofing membrane.

 Maintenance recommendations

Maintenance requirements for Danosa Roofing Products

The following maintenance checks must be adhered to:
- A general examination on the condition of the waterproofing and surrounding roof components.
- An inspection of all functional roofing elements including skylights, outlets, upstands, penetrations and any other visible roofing components.
- Clean outlets, drains, gutters and remove any debris from the roof.
- Periodic removal of mildew, moss, herbs or any other kind of vegetation that has been accumulation on the waterproofing.
- Periodic removal of possible sediments accumulated on the deck (silt, sledges, slate granules, etc) by occasional water accumulation.
- Periodic removal of debris and small objects that may have accumulated on the roof.
- Ensure surrounding structural elements are sound such as eaves, flashings, slate tiles and brickwork.
- Ensure that the waterproofing is in good condition and there are no blisters, damage or separation.
- Review the condition of the waterproofing (adherence to upstands, condition of overlaps, visual appearance, etc) and repair the defects observed.

These operations must be carried out twice a year, preferably at the beginning of spring or autumn and must be increased in case of decks or valleys with zero falls. It is also necessary to perform additional maintenance depending on the type of roof, location and proximity of roofs to areas with trees or in areas with high levels of pollution.

More details on the document Maintenance and repair recommendations for flat roofs waterproofed with modified bitumen sheets

 Handling, Storage and Conservation

- This product is neither toxic nor inflammable.
- Membranes should be stored carefully on clean dry level surfaces, under cover, protected from rain, sun, heat and cold temperatures and clear of the ground. The same protection should be given to materials temporarily kept outdoors or on the roof during construction.
- Membranes must be stored upright.
- Membranes should be taken to the roof as required for use.
- Membranes will be used on a FIFO basis (First In First Out).
- Do not stack one pallet on another pallet.
- In all cases, it must be taken into account Health and Safety standards at work, and the rules of good construction practice.
- Danosa recommends consulting the Safety Data Sheet of this product that is available permanently in www.danosa.com.

- This product is not toxic or flammable.
- It must be stored dry and protected from rain, sun, heat and low temperatures.
- It must be stored upright.
- Don’t store two pallets high.
- You must use the oldest batch of products first.
- No waterproofing works should be performed when weather conditions may be unsuitable. These include snow or ice on the roof, heavy rain, moisture, when there are strong winds.
- In all cases, the rules of health and safety at work and the rules of good construction practice should be considered.
- To store in racking at height the shelves must have three stringers or beams under the wooden pallet.
- Before handling the pallet you must check the status of the pallet and reinforce if necessary.
- If you are using a crane for handling purposes, you must ensure protection for others as stated on our packaging.
- Danosa advise you to consult the MSDS for this product which is available at www.danosa.com or may be obtained by writing to our Technical Department.


The information contained in this document and any other advice provided, are given in good faith, based on DANOSA's current knowledge and experience when products are properly stored, handled and applied, in normal situations and in accordance with the recommendations of DANOSA. The information applies only to the application (s) and the product (s) to which reference is expressly made. In case of changes in the parameters of the application, or in case of a different application, consult the DANOSA Technical Service before using the DANOSA products. The information contained herein does not exonerate the responsibility of the building agents to test the products for the application and intended use, as well as their correct application in accordance with current legal regulations. The product images used in our communications are indicative and may differ slightly in color and aesthetic appearance in relation to the final product.
Orders are accepted in accordance with the terms of our current General Sales Conditions.
DANOSA reserves the right to modify, without prior notice, the data reflected in this documentation.

Website: www.danosa.com E-mail: info@danosa.com Telephone: +34 949 88 82 10