Planning and construction guidelines

Area of application

Membranes in the SOLITEX MENTO family can be used as both underlay and sarking membranes. They stop cold air from flowing through the building structure and ensure that the thermal insulation works in an optimal manner.
With its extremely high level of watertightness and high stability, the SOLITEX MENTO family fulfils the requirements of the Central Association of the German Roofing Trade (ZVDH) and can also be used as a temporary covering.
In accordance with the regulations of the German roofing trade, they are suitable as an additional measure for rainproofing as sarking membranes when covering a roof with roofing tiles with simple overlapping. When used as an underlay membrane with simple overlapping on wooden decking, SOLITEX MENTO membranes are suitable as an additional measure for rainproofing even in the case of more demanding requirements.

Use as a temporary covering

SOLITEX underlay and sarking membranes can be used as temporary covering for up to 6 months to protect the building structure during the construction phase. In this case, the roof slope must be at least 14°. System adhesive tapes and adhesives should be used to stick overlaps and joints.
The connect variants have two self-adhesive sections for reliable exterior sealing. Dark marks may form on the membrane as a result of rainwater. These have no influence on the high high level of watertightness and the effectiveness of the interior membrane.

Retrofitting roof lining

In cases where there were previously no underlays, these can be retrofitted using SOLITEX underlay and sarking membranes. SOLITEX membranes provide optimal protection for the insulation structure thanks to the new technology of pore-free membranes. They are highly permeable and, at the same time, particularly resistant to driving rain, tear-resistant and insensitive to wood preservatives. SOLITEX MENTO 1000, 3000 and 5000 can be combined with all mat-shaped and panel-shaped insulation materials. For blown-in insulation, the use of reinforced SOLITEX MENTO PLUS is recommended.

No rear ventilation is necessary

Thanks to the high diffusion permeability of pro clima SOLITEX, rear ventilation of insulation is not required. The membrane can be applied directly onto the thermal insulation in all cases, i.e. the insulation thickness can be equal to the full height of the rafters. In the case of non-insulated attics, it is advantageous to provide hip ridge ventilation in order to ventilate the attic space. Complicated and often ineffective aeration and ventilation details at the eaves, ridge, valley, hip and additional roof features are thus unnecessary.

Maximum diffusion permeability

Moisture can dry out of the structure to the outside more easily and more quickly. This is advantageous both during the construction phase (when construction timber may be moist) and during normal use (when moisture from indoor air penetrates into the structure by diffusion or convection).
As a rule, moisture due to construction work should be able to escape the building quickly by ventilation through open windows. Dryers can help to speed up the drying process in wintertime. This helps to avoid permanently high levels of relative humidity.

No tent effect

The pore-free SOLITEX membrane offers a particularly high tightness to driving rain. The membrane can be laid to cover the entire surface of insulation materials or linings. As a result of the functional film being monolithic and having a multi-layer construction, a tent effect is reliably prevented.
The term ‘tent effect’ refers to the phenomenon that watertight tent sheets cause the entry of large amounts of moisture into building components at their points of contact.

Rainproof roof lining

The SOLITEX MENTO family fulfils the requirements of the ZVDH (Zentralverband des Deutschen Dachdeckerhandwerks - National Association of the German Roofing Trade) as a result of their exceptional high watertightness and high strength. It is suitable as an additional rain protection measure:

  • as a roof lining membrane of classes 3, 4 and 5
  • as a roof sarking membrane of classes 3, 4 and 6

The membranes can be used as a temporary cover.

Installation and fastening

The SOLITEX MENTO family is installed with the dark grey covering fleece side (printed side) facing outwards. The membranes can be installed taut parallel or perpendicular to the eave. Horizontal installation (perpendicular to the eave) is preferable with regard to water flow paths during the construction phase. When the product is used as a sarking membrane, the rafter spacing is limited to 1.00 m (3' 3").
Use clout nails or fastening staples that are at least 10 mm (3/8") wide and 8 mm (5/16") long to attach the membranes. The membranes can only be fastened with staples in the protected overlap area. The maximum distance between fasteners is 10 to 15 cm (4" to 6"). Allow for an overlap of at least 10 cm (4") between the membranes. A larger overlap is recommended if the roof slope is less than the critical roof slope.

Approval and composition

The special membranes in the SOLITEX MENTO family are made of a thermoplastic elastomer-ether-ester; the protective and covering fleeces are made of polypropylene.

All SOLITEX MENTO membranes have been tested in accordance with the requirements of EN 13859-1.
They have the CE label.

Technical hotline

If you have questions on applications, please contact the technical-support.

Classification of the membranes in classes according to the ZVDH instructions

Name according to ZVDH pro clima SOLITEX (1) Adhesive and tape, nail sealing tape Class
Roof lining
Seam and perforation-secure roof lining pro clima SOLITEX MENTO 1000 (or the respective connect version) with pro clima system accessories Adhesion in accordance with pro clima bonding agents and with TESCON NAIDECK 3
Bonded roof lining as before Adhesion in accordance with pro clima bonding agents, without nail sealing tape 4
Overlapped roof lining pro clima SOLITEX MENTO 1000 Loosely overlapping 5
Sarking
Seam and perforation-secure roof sarking Taut or free-hanging pro clima SOLITEX MENTO 1000 (or the respective connect version) with pro clima system accessories Adhesion in accordance with pro clima bonding agents and with TESCON NAIDECK 3 (2)
Seam-secured roof sarking as before Adhesion in accordance with pro clima bonding agents, without nail sealing tape 4
Sarking Taut or free-handing pro clima SOLITEX MENTO 1000 Loosely overlapping 6

(1) pro clima SOLITEX MENTO membranes are always laid beneath the counter batten, the counter batten is not integrated.
(2) The requirement for roof sarking membranes is USB-A, which pro clima SOLITEX MENTO membranes fulfil.