SOLITEX WELDANO

Substrate

Suit­able for in­stall­a­tion on firm sub­sur­faces that provide suf­fi­cient pres­sure res­ist­ance when us­ing a roller to press on the weld­ing bond, e.g. wooden deck­ing, wood-based pan­els and wood fibre un­der­lay pan­els.
The sub­sur­face must be dry, free of frost, clean and free of any sharp-edged or poin­ted ob­jects. There must be no wa­ter-re­pel­lent sub­stances (e.g. grease or sil­ic­one) on the mem­branes.
Be­fore ad­he­sion, SOLI­TEX WELDANO should be wiped clean with a cloth. It is re­com­men­ded that spot checks be per­formed to test the strength of the stuck joints.

General conditions

SOLITEX WELDANO is to be installed horizontally (parallel to the eave). Unhindered drainage of water must be ensured. Cross joints are to be avoided. If membrane joints are necessary, they should be offset with respect to each other.

To protect the building structure during the construction phase, SOLITEX WELDANO roof lining membranes can be subjected to outdoor exposure for up to 4 months (e.g. as a temporary covering in accordance with ZVDH ('Zen­t­ral­verb­and des Deutschen Dachdeck­er­handwerks' - Na­tion­al As­so­ci­ation of the Ger­man Roof­ing Trade)).
The roof pitch must be at least 5°. National regulations should be taken into account here.

Fasteners should not be applied on flat surface areas or in areas where water run-off is collected (e.g. in roof valleys). We recommend the use of corrosion-resistant fasteners.

The membrane edges are to be welded using the WELDANO TURGA system solvent welding agent or a hot air gun. The welding area must be dry and free of frost, dust and grease. If dirt (e.g. oil) is stuck to the surface, moisten a cloth lightly with WELDANO TURGA system solvent welding agent and use it to clean off this dirt. Both sides of the membrane can be welded and are suitable as upper layers.
Welding with a solvent welding agent can be carried out at temperatures above 0 °C / 32 °F. Please observe the hazard notices on the container.

If a hot air gun is being used, we recommend a temperature of around 220 to 280 °C (430 to 530 °F) depending on the ambient temperature and wind conditions. Test this setting by carrying out a test weld on a sample piece of membrane. A 40 mm (1.6") nozzle width has been found to be suitable in practice for welded joints between surface membranes. A 20 mm (0.8") nozzle may be more suitable in certain cases for more intricate joints.

The WELDANO ROFLEX pipe grommet is suitable for pipe diameters of 90 to 125 mm (3.5"-4.9") for roof pitches between 5° and 25°.
The WELDANO ROFLEX PLUS pipe grommet is suitable for pipe diameters of 90 to 120 mm (4.5"-4.75") for roof pitches up to 50°.

As an alternative to the use of the WELDANO ROFLEX, WELDANO INVEX or WELDANO INCAV system shaped elements, these elements can also be made by cutting appropriate shapes out of SOLITEX WELDANO membranes.

Important: The enclosed counter battens on the waterproof roof lining must be dry and chamfered on their upper side (≥ 3 mm; 0.1") when they are installed. Ideally, structural timber should be used.

Additional technical information for Germany:
Depending on the requirements demanded of the roof lining when used as an additional measure, the roof lining can be installed to be rainproof or watertight (in accordance with ZVDH). Rainproof roof lining: The counter battens are installed over the roof lining membrane. Waterproof roof lining: The counter battens are integrated into the sealing layer. The roof lining membrane is installed over the counter battens here or else SOLITEX WELDANO-S sealing strips are fitted over the counter battens and welded to the roof lining membrane on both sides.

Ridge ventilation is permitted in the case of a rainproof roof lining. The roof lining membrane should then stop 30 mm before the apex of the ridge. Cover the ventilation opening with a membrane strip over the counter batten along the ridge axis. Ridge ventilation is not permitted in the case of a waterproof roof lining.

The SOLITEX WELDANO roof lining membrane is to be bonded in a windproof and waterproof manner at the eave flashing. The eave flashing can be installed as a drip board under the gutter or as a guide board that guides water into the gutters. To protect the roof lining membrane from direct sunlight on a permanent basis, the width of the eave flashing should be selected appropriately depending on the roof pitch and the orientation of the building structure.