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AXTER ROOF WATERPROOFING AND INSULATION SPECIFICATION |
| Supporting deck |
Existing waterproofing |
| Application |
Two-layer waterproofing with insulation |
| System reference |
FORCE LINE |
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Existing waterproofing with added thermal insulation
Two layer waterproofing
Reinforced bitumen membranes should only be applied over a continuous substrate which provides full support. Substrate Materials used to form the roof deck in flat roofs should be those listed in BS 6229:2003 Flat roofs with continuously supported coverings – Code of practice and conform to the relevant requirements in BS 8217:2005 Reinforced bitumen membranes – Code of practice.
The waterproofing system should conform to the requirements of British Standard 8747:2007 Reinforced Bitumen membranes (RBMs) for roofing – Guide to selection and specification and be installed in accordance with British Standard BS 8217:2005. |
| Supporting deck |
Existing membrane or asphalt waterproofing system |
| Deck preparation |
Ensure substrate is sound, cut and seal all blisters, remove details. Prime all surfaces with a suitable bituminous primer and allow to dry in accordance with Annex C of British Standard BS 6229:2003. |
| Vapour control layer |
Existing waterproofing will act as the vapour control layer. |
| Thermal insulation |
PIR rigid foamed boards |
| Waterproofing system |
Base layer |
THERMECRAN |
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Intermediate layer |
FORCE LINE 3 VV |
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Cap sheet |
FORCE LINE 4.5 RE |
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SP classification |
S4P3 |
| Details |
FORCE LINE 4.5 RE |
| Finishes |
Self protected system |
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Product substitution
- The two layers, THERMECRAN and FORCE LINE 3 VV, can be replaced by a single layer of HYRANGER SPOT ADH self adhesive membrane. In which case the thermal insulation must have a coated glass fibre surface such as EL 3000 from CELOTEX or TR 27 from Kingspan.
- FORCE LINE 4.5 RE can be replaced by FORCE LINE 4 RE.
NBS specification
Please view the Axter NBS specification for further information.
Notes
All membrane products torch applied except THERMECRAN which is loose laid.
PIR rigid foamed boards laid in hot or cold applied bitumen or PUR adhesive.
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