SikaShield® VB P42 S 3 mm is a modified, bituminous, torch-applied, waterproofing membrane. It is reinforced with a dimensionally stable non-woven polyester inlay. It can be applied to various deck types and surface combinations.

These vapour barriers offer increased high-performance that enhances watertightness. The engineering of the membranes gives improved elongation and cold flexibility, which also contributes to increased mechanical properties such as tensile, tear, and shear. The membranes have good resistance to impact and are easy to install by torching method. There is a choice of primers to suit substrate and weather conditions.

Logo FM approved
Image: SikaShield® VB P42 S 3 mm is FM approved

SikaShield® VB P41 S 3 mm is a modified, bituminous, aluminium foil cored, torch-applied, waterproofing membrane. It is reinforced with a dimensionally stable non-woven polyester inlay. It can be applied to various deck types and surface combinations.

These vapour barriers offer increased high-performance that enhances watertightness. The engineering of the membranes gives improved elongation and cold flexibility, which also contributes to increased mechanical properties such as tensile, tear, and shear. The membranes have good resistance to impact and are easy to install by torching method. There is a choice of primers to suit substrate and weather conditions.

SikaShield® VB E71 PE SA 3 kg/m² is an SBS modified bituminous, self-adhesive vapour control layer. It is reinforced with aluminium foil and a dimensionally stable non-woven polyester inlay.

This membrane is a heat transfer, self-adhesive application, for use with Safe2Torch and combustible materials, where torch application is not advisable. The membrane offers high resistance to vapour movement and enhanced watertightness. It also features high elongation and high mechanical properties, which make it an excellent membrane for specification. The membrane also accommodates a wide range of roof systems, deck types and substrate combinations, which gives the option to tailor the specifics of a project.

FAQ

What is a bitumen vapour control layer in roofing systems?

A bitumen vapour control layer is a bitumen-based membrane installed within a roofing buildup to prevent warm, moist air from inside a building from reaching colder layers, where it could condense and cause damage.

Where are bitumen vapour control layers typically used?

Bitumen vapour control layers are used in flat roof constructions beneath insulation and waterproofing membranes.

Why are bitumen vapour control layers important in flat roof construction?

Bitumen vapour control layers play a critical role in flat roof construction by preventing warm, moist air from inside the building from reaching colder parts of the roof buildup. Without a vapour control layer, this moisture can condense within the insulation or structure, leading to reduced thermal performance, mould growth and long-term damage.

What types of bitumen vapour control membranes does Sika offer?

Sika offers torch-applied and self-adhesive bitumen vapour control membranes. Some membranes feature aluminium reinforcement for enhanced water vapour resistance.

What installation methods are used for Sika bitumen vapour control membranes?

Sika bitumen vapour control layers can be applied using torch-applied or self-adhesive methods.

How do I choose the right bitumen vapour control layer for my project?

Consider factors such as internal humidity, insulation type and roof buildup. Contact a member of our team for technical support to ensure the correct specification for your project.

What roofing system are Sika bitumen vapour control layers compatible with?

Sika bitumen vapour control membranes are fully compatible with the SikaShield® bituminous membranes systems.