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Vapour retarder WÜTOP® DB 3
Vapour-permeable, moisture-regulating, airtight and easy-to-install vapour retarder for interior renovations and attic conversions. To be used in conjunction with vapour-permeable underlay membranes and roof protection films
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- Durable and tear-resistant thanks to embedded mesh fabric
- Prevents heat loss caused by unnecessary airflow
- Prevents moisture penetration of internal heat insulation and, therefore, the impairment of the insulating effect
- DB3 3SK with double-sided adhesive strips for permanently airtight/windproof bonding
- Wütop DB 3 in combination with vapour-permeable roof protection film from the Wütop series provides year-round breathability for insulation and frame structure, creating a healthy indoor climate
DIN EN 13984
Installation instructions for between-rafter insulation
- Fix Wütop DB 3 to the warm side of the heat insulation using a stapler (hammer tacker or manual stapler) and secure to battens
- The smooth side always faces toward the installer
- Vertical overlaps must always lie on a rafter
- Ensure sufficient overlap: Horizontal overlap: at least 10 cm (overlap strip), vertical overlap: approx. 20 cm
- All overlaps and stapled points must be given an airtight seal using suitable adhesive tape (Eurasol)
- For airtight attachment to masonry, the membrane is bonded using Wütop film adhesive and secured with a clamping batten, if necessary
- Take care not to damage the membrane during installation
- Before the interior cladding is attached (drywall, wood panelling etc.), check again that the vapour retarder has been correctly installed and correct if necessary
Installation instructions for over-rafter insulation
- Wütop DB 3 is ideal for use as a vapour retarder for over-rafter insulation
- Installation: Same procedure as for between-rafter insulation
- Please keep in mind: May be exposed to weather for max. 6 weeks
Installation instructions for renovation of old buildings
- Sharp objects (e. g. nails) that protrude from the interior cladding into the rafter area must be removed to avoid damaging the vapour retarder
- Wütop DB 3 is laid over the rafters from the outside with the fleece facing the room interior. Install with the smooth side facing outwards
- All overlaps and openings must be given an airtight seal using suitable adhesive tape (Eurasol)
- Recommendation: Secure Wütop DB 3 to the rafters using clamping battens
- Bond joints at the eaves (eave beams or masonry) using Wütop film adhesive. Additional mechanical fixing with clamping battens is recommended
- Wütop DB 3 vapour retarder must not be used to renovate interiors in which the humidity is continually over 60%
- According to DIN 4108 part 3, structures that do not conform to standard construction methods must be verified with a calculation (dew point calculation). Therefore, the use of Wütop DB 3 for renovation work must be agreed upon beforehand by Würth Application Support (phone: +49 (0)7940 15-2552)
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