The trussing sheet/glued sub-roof is the most common additional measure within the CREATON system. The measure is suitable for most roof shapes with normal roof pitches. It can be established using all CREATON sub-roof membranes. A characteristic feature of the trussing sheet/glued sub-roof is that it is easy to install and can be quickly integrated at roof flashing and roof closure elements thanks to CREATON accessories. Depending on the selected products and roof pitch it can be installed with or without nail seals underneath the counter battens. This page provides you with detailed information about the variant.
The specifications relating to sub-roof installations are CREATON manufacturer data, which differs from the specifications of national stipulations (such as ZVDH, ÖNORM or SIA standards). For this reason, we recommend you coordinate procedures and conclude individual agreements between yourselves as the installing roofers and the end customer or owner of the property. This will serve to safeguard the interests of both parties from a contractual point of view as a supplement to the service agreement. Visit www.creaton.de / www.creaton.at / www.creaton.ch for a template of such an individual agreement in the CREATON sample documents for any clay roof tile and concrete roof tile model.
In ventilated cold roofs the sub-roof must not end more than 30 mm from the top of the ridge. The openings must also be protected. As a result of the arrangement of ventilation areas, penetrating driving snow or rain cannot be ruled out when certain factors coincide, such as strong winds and drizzle.
Uninsulated loft spaces must be ventilated, e.g. by openings along the ridge or sufficient amounts of cross venting. When installing trussing sheets the roof membranes must end approximately 5 cm ahead of the line at the top of the ridge. The openings must be covered to protect against driving snow and penetrating rain, taking into account ventilation cross-sections as per DIN 4108. Note: An ingress of driving snow and rain through ventilation openings cannot be totally avoided in ventilated systems. If you intend to install sub-roof panels directly over the heat insulation, the sub-roof membrane must be adapted to the demands of the layer structure, in particular in terms of its diffusion resistance.
|Implementation of additional measures when using CREATON clay roof tiles / CONCRETE ROOF TILES and CREATON Sub-roof membranes - Germany|
|ADDITIONAL MEASURE ACCORDING TO CREATON MANUFACTURER'S DATA|
|≥ 14 °||≥ 16 °||≥ 18 °||≥ 18 °||≥ 21 °||≥ 24 °||Installation of a trussing sheet/glued sub-roof without nail seals, possible CREATON products: DUO extra, DUO longlife ND extra, TRIO extra, QUATTRO longlife extra|
|≥ 12 °||≥ 14 °||≥ 14 °||≥ 16 °||≥ 17 °||≥ 22 °||Installation of a trussing sheet/glued sub-roof without nail seals, possible CREATON products: DUO longlife ND extra|
|≥ 12 °||≥ 14 °||≥ 14 °||≥ 16 °||≥ 17 °||≥ 22 °||Installation of a trussing sheet/glued sub-roof with nail seals, possible CREATON products: DUO extra, DUO longlife ND extra, TRIO extra, QUATTRO longlife extra|
|Trussing sheet/overlapped sub-roof without nail seals, now only intended for subordinate buildings such as sheds. Installation only according to ZVDH specifications.|