Axter Excel® system
Axter Excel® system |
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Existing roof
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Overlay of existing waterproofing with a single-ply fully bonded bitumen membrane. (Axter can provide written detailed specifications to suit any building on demand)
| Usage | Products |
| Existing waterproofing | Ensure that the existing waterproofing and insulation (if installed) are dry and well attached to the supporting deck. Cut and seal any blisters or loosely attached layers of membrane and remove membrane from all details. In the case of mastic asphalt smooth all undulations and remove asphalt from all details. Any splits or large cracks must be covered for their full length with a loose laid slip joint comprising a min 150 mm wide strip of Axter's SAMTOR 125. |
| Primer | Prime existing waterproofing with Axter's VERNIS ANTAC (see brochure)quick drying primer and allow to dry. |
| Top layer | Fully bond by torching Axter's EXCEL HR S, Alpa-mix modified bitumen membrane, colour to choice to the primed surface. Side and end laps to be carefully torch bonded with a 2 mm bitumen visible bead. |
| Details | At the base of all upstands a reinforcement layer of Axter's HYRANGER 35 PY angle strip 250mm girth should be installed centrally in the angle and bonded to both flat and vertical surface. The top layer should then be taken up the upstand. |
| Rainwater outlets, etc. | A 1m x 1m soaker of Axter's HYRANGER TS CPV membrane must be installed prior to the installation of the waterproofing layer and the flange of the rainwater outlet should be encapsulated between the two layers. |
| Gutter | A base layer of Axter's HYRANGER TS CPV must be fully bonded to the deck prior to the installation of the EXCEL HR S. |
In general specifications should follow the guidelines given in:
British Standard Code of Practice BS 6229:2003, Flat roofs with continuously supported coverings.
British Standard Code of Practice BS 8217:2004, Flexible bitumen sheet roofing.
Specifications are given for roof slopes< 5°. Additional mechanical fastening will be required for higher roof slopes. Apply to Axter for further information.
Axter advises that an AXTERSHIELD INSTALLER, who has specialist knowledge of Axter's systems, installs the specification given above and from whom extended guarantees can be obtained.
Specifications listed are for guidance only and Axter cannot be held responsible for any errors or omissions. It is the specifier's responsibility to ensure that the specifications are suitable for the requirements of his construction.
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