SikaShield® VB E71 PE SA 2,4 mm

CE marking and Declaration of Performance to EN 13970 – Bituminous layers for Vapour Control — Definitions and characteristics 

12 months from date of production

The Product must be stored in original unopened and undamaged packaging in dry conditions and temperatures between +5 °C and +35 °C. Protect the Product from direct weather exposure and sunlight. Store in a vertical position.

Always refer to packaging.

SYSTEM DESIGN

Consider the following when designing the system:

• The supporting structure must be of sufficient structural strength to support all new and existing layers of the system build-up.

• If used as a roof system, the complete system must be designed to withstand and be secured against wind uplift loadings.

SUBSTRATE CONDITION

The substrate surface must be uniform, firm, smooth and free of any sharp protrusion or burrs, clean, dry, free of grease, laitance, oil, dust and loosely adhering particles.

Installation procedure

Strictly follow installation procedures as defined in method statements, application manuals and working instructions which must always be adjusted to the actual site conditions. 

Priming

Apply the appropriate primer, Sika® Primer 600 or Sika® Primer 610, at the correct consumption to the prepared dry surface and allow to dry before next application stage. Refer to the individual Product Data Sheets.

IMPORTANT

Unrolling at low temperatures

At low temperatures, the membrane becomes less flexible.

1. Be careful when unrolling to avoid damaging the membrane.
2. Laying the membrane at temperatures ≤+10 °C and or in high humidity conditions, use suitable heat producing equipment to heat and / or dry the substrate.

IMPORTANT

Damage through footwear

Footwear with spikes or sharp protrusions may puncture the membrane.

1. Use footwear with a flat profile when walking over the membrane.

IMPORTANT

Application on sloped surfaces

For slopes with an inclination greater than 15 %, multi-layered roofs must be carefully designed and, if necessary, integrated with mechanical fastenings.

Seasonal symbol

Note: If a seasonal symbol is printed on the roll’s label, it is advisable to use the membrane during the indicated season.

Tackiness at high temperatures

Note: When laying the membrane at high temperatures, the integral adhesive will become 'tacky' and may restrict laying operations.

ALIGNMENT

IMPORTANT

Avoid coinciding joints

To avoid coinciding joints, lay the membranes parallel to one another. When applying on another bituminous membrane, make sure to straddle the overlaps of the previous layer.

1. Unroll the membrane.
2. Align the membrane.
3. Re-roll the membrane before application.  

MEMBRANE OVERLAPS

1. Overlap the membranes by a minimum of 100 mm on the sides and 150 mm on each end or as specified by the supplier.
2. At the end overlap, cut off a corner measuring 100 mm per side at an angle of 45°.

BONDING

1. Check the alignement of the sheet before bonding. Re-align where necessary.
2. At one end of the sheet, peel away part of the silicone release liner from the underside and bond this part to the substrate.
3. Peel away the release liner sideways from the rest of the SikaShield® VB E71 PE SA 2,4 mm sheet to allow it to bond on the substrate.
4. Roll the entire surface are of the applied membrane with a suitable heavy roller ensuring any air bubbles are removed.

When laying insulating panels over the membrane, they must be mechanically fixed to the substrate through the membrane.

Suitable substrates for bonding

• Primed Concrete

• Plywood panels, timber boards, OSB

• Metal

DETAILING

1. Use a sharp knife to cut in all details such as internal and external corners, upstands, vent pipes, drains, support metalwork etc.

Refer to the relevant method statement for further information on detailing.