Danosa Esterdan 50/GP POL Torch On Mineral Cap Sheet Grey – 1m x 8m

£51.30 £61.56

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ESTERDAN 50/GP POL is a waterproofing bituminous sheet with self-protected surface of 5 kg/m².
Composed of a reinforced polyester felt reinforcement, covered on both sides with polymer modified bitumen mastic. On the upper side of the sheet, mineral protection is used as protective material. The anti-adhesive material used on the lower side is polyethylene film. The membrane, being made of a bitumen mastic modified with plastomers, provides high performance at high and low temperatures, plasticity and resistance to ageing, which leads to greater durability of the sheet and greater safety of the waterproofing membrane.
High resistance to tearing.
High tensile strength and high elongation at break.
High resistance to static and dynamic piercing.
Very stable in the long term.
Great dimensional stability.
Good performance in nailed systems.
Absorbs structural movements well.
Has good piercing protection from possible mechanical damage, derived from the occasional pedestrian traffic typical of flat roofs.
It retains its properties better over time.
Helps to increase the durability of the sheet.
Limits deformations and stresses in the waterproofing membrane. Single-layer membrane for waterproofing bonded self-protected roofs.
Multilayer membrane top sheet for roof waterproofing with mineral self-protection.
The mineral finish gives the sheet UV resistance, which is necessary for visible waterproofing. Therefore, this sheet can be used as a top layer in two-layer membranes with heavy bonded protection in place of the plasticised sheet, in those cases where it is foreseen that a certain time will elapse between the execution of the waterproofing and the protection.
Waterproofing under tiles on pitched roofs, both for its thickness and its mechanical resistance. In addition, the mineral self-protection makes work on the roof easier and more convenient. In these cases, the sheet, in addition to adhering to the substrate, will be nailed to the substrate. Preparation of the substrate:
-The surface of the base substrate must be resistant, uniform, smooth, clean, dry and free of foreign bodies. In the case of thermal insulation, the boards shall be laid in a grid and with no gaps between boards greater than 0.5 cm.
– Top layer of multi-layer membranes with mineral self-protection. The sheet is laid in the same direction as the bottom sheet, with the overlap line offset by approximately half of the roll. The sheet is fully welded to the bottom sheet with a blowtorch. The overlaps are to be welded and are 8±1 cm in the longitudinal direction and 10±1 cm in the transverse direction. To join the transverse overlap at the ends of the rolls, it is necessary to heat the transverse edge of the lower sheet in a 10 cm strip, eliminating or embedding the protection aggregate in the bituminous mass and then weld the end of the following piece. – Self-protected single-layer membrane, adhered system. The adhesion of the membrane to the substrate is done with a blowtorch. In the case of mortar or concrete substrates, a bituminous primer (CURIDAN, IMPRIDAN100, MAXDAN or MAXDAN CAUCHO) must be applied beforehand. If the substrate is a weldable thermal insulation board, i.e. finished in asphalt (Rocdán A or Rocdán PIR VA), the primer is not necessary. The overlaps must be welded, and shall be 8±1 cm in the longitudinal direction and 10±1 cm in the transverse direction. To join the transversal overlap at the ends of the rolls, it is necessary to previously heat the transversal edge of the lower sheet in a strip of 10 cm, eliminating or embedding the protection aggregate in the bituminous mass and then weld the end of the following piece. Waterproofing under tiles on pitched roofs. Proceed as described above, but mechanically fasten the overlaps. Do not use as a top sheet on green roofs.
This product may form part of a waterproofing system, so all the documents referred to in the Danosa Solutions Manual must be taken into account, as well as all the regulations and legislation that must be complied with in this respect.
On exposed self-protected roofs, occasional water retention that could lead to sediment accumulation and damage to the waterproofing membrane shall be avoided.
Sheets made of plastomeric bitumen require more blowtorch input than sheets made of SBS elastomeric bitumen in order to work properly. It is important to take this aspect into consideration when welding the sheets to the substrate, when welding the overlaps of the sheets and when welding the sheets to each other.
There is no chemical incompatibility between the Danosa range of oxyasphalt, SBS elastomeric bitumen and plastomeric bitumen sheets.
Special attention must be paid to the execution of the singular points, such as parapets (meetings with vertical and emergent elements), drains, expansion joints, etc.
If it is necessary to adhere to metallic or slightly porous elements, a bituminous primer (IMPRIDAN 100) shall be applied to the entire surface to be welded beforehand.
Possible incompatibility between thermal insulation and waterproofing shall be checked.
If expansion that could affect the sheet is expected, a geotextile separating layer (Danofelt PY 200) shall be used between the sheet and the extruded polystyrene insulation panels, so that each product expands independently.
Polyurethane foam shall not be sprayed directly on top of the waterproofing without the use of a suitable separating layer (geotextiles, mortar layers, polyethylene film, etc).
In case of renovation, chemical incompatibilities with old waterproofing consisting of flexible PVC sheets, modified tar-based mastics or any other, shall be taken into account, and it may be necessary to remove them completely or to use suitable separating layers (geotextiles, mortar layer, polyethylene film, etc).
In case of new construction and renovation, possible chemical incompatibilities with other sheets shall be taken into account.
Self-protected sheets finished in light colours perform better thermally.
Self-protected sheets are exposed sheets, so care must be taken when installing them.
NOTE: For more information on the Danosa systems in which this product is used, please see the document “Waterproofing Solutions”.
Self-protected sheets in coloured mineral or ceramic granules may have different colour shades depending on the different production batches.


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