SIGA Majrex 200 - Vapour Control Layer - 1.5m x 50m roll

SIGA Majrex 200 - Vapour Control Layer - 1.5m x 50m roll

Majrex 200 is SIGA’s high‑performance vapour control layer designed for warm‑side installation in roofs, walls and ceilings. Its directional vapour‑control technology (Hygrobrid®) allows moisture to move safely out of the structure while preventing moisture from entering, significantly reducing the risk of condensation, mould, and structural damage. It allows controlled drying towards the interior when needed.

This makes Majrex 200 ideal for timber‑frame, steel‑frame, and insulated roof constructions, especially where moisture safety is critical. Majrex 200 offers superior moisture management, high durability, and excellent airtightness, making it a trusted choice for modern, energy‑efficient buildings. Its directional vapour‑control behaviour provides a significant safety advantage over traditional VCLs, especially in timber structures.

CHARACTERISTICS

• Hygrobrid® directional technology - prevents moisture ingress while allowing safe drying.
• High tear resistance - reinforced membrane for reliable installation.
• Improved condensation control - reduces risk of mould and structural damage.
• Airtight layer - supports energy‑efficient construction.
• Easy installation - stable, low‑stretch membrane for clean detailing.
• Compatible with SIGA tapes - ensures durable, airtight joints.
• Suitable for roofs and walls - versatile across building envelopes.

APPLICATION

• Warm‑side vapour control in roofs and walls
• Timber‑frame construction
• Steel‑frame insulated walls
• Ceilings and loft conversions
• Moisture‑sensitive assemblies