SIGA Majcoat 150 SOB Breathable Membrane for Pitched Roofs - 1.5m x 50m roll

SIGA Majcoat 150 SOB Breathable Membrane for Pitched Roofs - 1.5m x 50m roll
SIGA Majcoat 150 SOB Breathable Membrane for Pitched Roofs - 1.5m x 50m roll
Guide Price
SIGA Majcoat 150 SOB Breathable Membrane for Pitched Roofs - 1.5m x 50m roll
SIGA Majcoat 150 SOB Breathable Membrane for Pitched Roofs - 1.5m x 50m roll
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SIGA Majcoat 150 SOB Breathable Membrane for Pitched Roofs - 1.5m x 50m roll
Guide Price: £201.38 (£241.66 inc VAT)
Price per m2: £2.69/m2 (£3.22 inc VAT)
  • Product Code: A1-7693
  • Delivery Time: 3 - 5 days
  • Brand: SIGA
  • Model: 1.5m x 50m - 75m2
  • Weight: 11.25kg
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SIGA Majcoat 150 SOB Breathable Membrane for Pitched Roofs - 1.5m x 50m roll

Length: 50000mm
Width: 1500mm
Roll Coverage: 75m2
Weight/m2: 0.15kg
Weight: 11.25kg

SIGA Majcoat 150 SOB is a breathable, robust, nail‑tight pitched‑roof membrane with integrated self‑adhesive strips (SOB) for fast, wind‑tight installation. It provides exceptional weather protection, high vapour permeability, and long‑term durability, making it ideal for modern roof constructions requiring reliable wind‑tightness and moisture management. SIGA Majcoat 150 is a diffusion‑open, three‑layer functional membrane engineered for installation above rafters in pitched roof assemblies. With an sd‑value of approx. 0.15 m, it allows moisture to escape safely while protecting the structure from wind, rain and snow during construction and throughout the building’s life.

The membrane is extremely robust, UV‑stable, and nail‑tight, ensuring secure performance even under mechanical stress from battens and fixings. Its high water‑resistance and wind‑tightness help maintain thermal efficiency and prevent moisture ingress. Majcoat 150 is suitable for open‑joint cladding up to 20mm, making it versatile for both traditional and contemporary roof designs. SIGA Majcoat 150 is a durable, breathable and nail‑tight membrane designed for pitched roofs requiring long‑term weather protection and safe moisture management. Its robust construction, UV stability and compatibility with SIGA sealing products make it a dependable choice for modern roof assemblies.

CHARACTERISTICS

  • Integrated self‑adhesive strips - fast, wind‑tight sealing of overlaps.
  • Highly breathable membrane - sd ≈ 0.15m for safe moisture transport.
  • Wind‑tight and weatherproof - protects insulation and structure from wind and rain.
  • Nail‑tight performance - reinforced layers resist puncture from fixings.
  • UV‑stable - suitable for open joints up to 20mm.
  • Robust 3‑layer construction - durable functional film with protective layers.
  • Wide temperature resistance - reliable performance in extreme conditions.
  • Compatible with SIGA tapes - ensures airtight and wind‑tight detailing.

APPLICATION

  • Above rafters, pitched roofs, open‑joint cladding
  • Pitched roof underlay for wind‑tightness and weather protection
  • Breathable roof build‑ups
  • Open‑joint cladding up to 20mm
  • Timber‑frame roof construction
  • High‑performance insulation systems
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