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.

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

UNE EN 13707.
UNE EN 13969.

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

– 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.