Heavy-weight roof underlay

connect variant with self-adhesive zones

Advantages

  • Maximal flexibility in planning construction schedules thanks to 6 months of outdoor exposure
  • Ensures reliable building components: highly diffusion-open and maximum protection against driving rain
  • Dry building components: pore-free TEEE functional membrane actively transports moisture to the outside
  • Permanent protection thanks to the high resistance to ageing and heat of the TEEE membrane
  • Reliable during the construction phase: suitable for temporary coverings during construction work

Areas of Application

For use as a permeable sarking or roof underlay on roof decking, MDF and wood fibre underlay panels, and on all thermal insulation materials.

Installation instructions

General conditions

SOLITEX MENTO membranes are to be installed with the printed side facing the installation technician. The membranes are to be installed as a roof underlay or sarking membrane horizontally (parallel to the eave) in a taut manner with no sagging. When it is used as a sarking membrane, the rafter spacing is limited to 100 cm (3 ft).

Fasteners may not be applied in areas where water run-off is collected (e.g. in roof valleys).

Ridge ventilation should be provided in the case of non-insulated attics that have not been converted. To do so, install the SOLITEX membrane in such a way that it stops 5 cm (2") before the ridge. In addition, permanent ventilation fittings should be provided in the unconverted attic.
The membrane should be protected against the long-term impacts of UV radiation (e.g. by darkening windows).

The SOLITEX MENTO 5000 roof underlay can be used as temporary covering for up to 6 months to protect the building structure during the construction phase in accordance with the regulations of the Central Association of the German Roofing Trade (ZVDH). In this case, the roof pitch must be at least 14°. The system components TESCON NAIDECK nail sealing tape, ORCON F joint adhesive and TESCON VANA are to be used for bonding of overlaps and joints. The connect variant has two self-adhesive zones for reliable exterior sealing. The specifications in the regulations of the German Roofing Trade are to be taken into account when carrying out installation and adhesion.

In accordance with these regulations, they are suitable as ‘sarking membranes’ for covering a roof with roof tiles and roof stones with simple overlapping as an additional measure for rain protection. When used as an ‘underlay membrane’ with simple overlapping on timber cladding, SOLITEX MENTO membranes are also suitable as an additional measure for rain protection in the case of more demanding requirements.

Additional instructions for blown-in insulation materials
SOLITEX MENTO 5000 can also be used as a boundary layer for blown-in insulation materials of all types. It is recommended to use nail sealing underneath counter battens (e.g. TESCON NAIDECK). The battens must already be fitted before the blowing-in process takes place. A protruding lath must be fitted on the supporting battens in the centre of the space between the rafters so that moisture occurring under the covering can mainly be drained off centrally between the rafters. This protruding lath should be at least 1 cm thicker than the counter battens. It limits the bulging of the membranes during the blowing-in process and ensures the necessary cross-sectional area for ventilation.

If the insulation material is blown in from the outside, the blow-in holes can subsequently be stuck using TESCON VANA with a width of 15 cm (6").

SOLITEX MENTO® system - Retrofitting underlay from the inside

In cases where there is no underlay present, underlay can be retrofitted from the inside using one of the SOLITEX roof underlays.
SOLITEX membranes are equipped with a monolithic, pore-free functional membrane.
As a result, they are watertight against water from the outside and can actively transport moisture from the building structure into the open at the same time.
This ensures optimal protection for the insulation structure.
If blown-in insulation materials are used, use of the reinforced product variants SOLITEX MENTO PLUS or SOLITEX MENTO ULTRA is recommended.

Advantages

  • Ensures reliable building components: highly diffusion-open and maximum protection against driving rain
  • Dry building components: pore-free TEEE functional membrane actively transports moisture to the outside
  • Permanent protection thanks to the high resistance to ageing and heat of the TEEE membrane
  • SOLITEX MENTO PLUS / ULTRA: extremely robust thanks to reinforcement: suitable for blown-in insulation materials

Reliable system for installation from the inside

Roof structures without underlay and thus without a counter-batten plane are often encountered on existing buildings.
If insulation is to be fitted on these structures, it is recommended to first retrofit an exterior windtightness layer to improve the reliability of the structure.
This measure is recommended for a max. period of 5 years.
The roof pitch of the roof tiles must not be less than the standard roof pitch.
The roof pitch must be at least 20°.
Installation is carried out from the inside, proceeding in turn from one space between rafters to the next.
Battens at the corners of the rafters/tile battens allows for the necessary ventilation for the roof covering.
A ‘protruding lath’ in the middle of the space between rafters results in a valley in the SOLITEX membrane.
In this way, any water that has entered can be drained off to the middle of the area between the rafters (away from the rafters) and towards the eaves.
Attach the SOLITEX membrane to the rafters using battens or DASATOP FIX.
The membranes must be overlapped in a waterproof manner and must drain reliably into the open.