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

SIGA Majcoat 150 Breathable Membrane for Pitched Roofs - 1.5m x 50m roll
SIGA Majcoat 150 Breathable Membrane for Pitched Roofs - 1.5m x 50m roll
Guide Price
SIGA Majcoat 150 Breathable Membrane for Pitched Roofs - 1.5m x 50m roll
SIGA Majcoat 150 Breathable Membrane for Pitched Roofs - 1.5m x 50m roll
Rate this product
SIGA Majcoat 150 Breathable Membrane for Pitched Roofs - 1.5m x 50m roll
Guide Price: £185.34 (£222.41 inc VAT)
Price per m2: £2.47/m2 (£2.97 inc VAT)
  • Product Code: A1-7692
  • Delivery Time: 3 - 5 days
  • Brand: SIGA
  • Model: 1.5m x 50m - 75m2
  • Weight: 11.25kg
Our ratings on 04-11-2026:
Google My Business Reviews
4.8 out of 5

SIGA Majcoat 150 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 is a breathable, robust, nail‑tight membrane designed for pitched roofs with open or closed joints. 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

  • 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
300mm SIGA Fentrim IS 2 (15/285mm) - Pre-Folded Exterior Airtight Sealing Tape - 25m roll - Box of 2 rolls 300mm SIGA Fentrim IS 2 (15/285mm) - Pre-Folded Exterior Airtight Sealing Tape - 25m roll - Box of 2 rolls
Guide Price
Brand: SIGA Model: 300mm x 25m roll - Box of 2 rolls
Delivery Time: 3 - 5 days
300mm SIGA Fentrim IS 2 (15/285mm) - Pre-Folded Exterior Airtight Sealing Tape - 25m roll - Box of 2 rolls
300mm SIGA Fentrim IS 2 (15/285mm) is a pre‑folded exterior airtight adhesive tape designed for wind‑tight, driving‑rain‑resistant sealing of window and door junctions in solid and metal constructions. It delivers extremely strong all‑over adhesion, a plasterable non‑woven surface, and fast, precise..
Guide Price: £332.78
£399.34 inc VAT
4-8mm SIGA Fentrim Grommet White - Self-Adhesive EPDM Grommet - Box of 20 4-8mm SIGA Fentrim Grommet White - Self-Adhesive EPDM Grommet - Box of 20
Guide Price
Brand: SIGA Model: 4-8mm - Box of 20
Delivery Time: 3 - 5 days
4-8mm SIGA Fentrim Grommet White - Self-Adhesive EPDM Grommet - Box of 20
4-8mm SIGA Fentrim Grommet White is a robust, self‑adhesive EPDM grommet designed for quick, airtight sealing of circular penetrations such as pipes and cables. It delivers immediate 100 % tightness, extremely high adhesive strength at both high and low temperatures, and a plasterable fleece/film co..
Guide Price: £71.21
£85.45 inc VAT
8-12mm SIGA Fentrim Grommet White - Self‑Adhesive EPDM Grommet - Box of 10 8-12mm SIGA Fentrim Grommet White - Self‑Adhesive EPDM Grommet - Box of 10
Guide Price
Brand: SIGA Model: 8-12mm - Box of 10
Delivery Time: 3 - 5 days
8-12mm SIGA Fentrim Grommet White - Self‑Adhesive EPDM Grommet - Box of 10
8-12mm SIGA Fentrim Grommet White is a robust, self‑adhesive EPDM grommet designed for quick, airtight sealing of circular penetrations such as pipes and cables. It delivers immediate 100 % tightness, extremely high adhesive strength at both high and low temperatures, and a plasterable fleece/film c..
Guide Price: £36.54
£43.85 inc VAT
15-22mm SIGA Fentrim Grommet White - Self‑Adhesive EPDM Grommet - Box of 10 15-22mm SIGA Fentrim Grommet White - Self‑Adhesive EPDM Grommet - Box of 10
Guide Price
Brand: SIGA Model: 15-22mm - Box of 10
Delivery Time: 3 - 5 days
15-22mm SIGA Fentrim Grommet White - Self‑Adhesive EPDM Grommet - Box of 10
15-22mm SIGA Fentrim Grommet White is a robust, self‑adhesive EPDM grommet designed for quick, airtight sealing of circular penetrations such as pipes and cables. It delivers immediate 100 % tightness, extremely high adhesive strength at both high and low temperatures, and a plasterable fleece/film ..
Guide Price: £39.01
£46.81 inc VAT
500mm SIGA Trestard 420 Black FR Adhesive Tape - Fire Rated Adhesive Tape - 25m roll 500mm SIGA Trestard 420 Black FR Adhesive Tape - Fire Rated Adhesive Tape - 25m roll
Guide Price
Brand: SIGA Model: 500mm x 25m roll
Delivery Time: 3 - 5 days
500mm SIGA Trestard 420 Black FR Adhesive Tape - Fire Rated Adhesive Tape - 25m roll
500mm SIGA Trestard 420 Black FR Adhesive Tape is a fire-rated, fully self-adhesive sealing tape designed for the permanent airtight, windtight and weathertight sealing of internal and external window and door connections. Manufactured from a specialist polyolefin film and fleece composite with a hi..
Guide Price: £366.99
£440.39 inc VAT
SIGA Sicrall 60 - Single-Sided Airtight Sealing Tape - 60mm x 40m roll - Box of 10 rolls SIGA Sicrall 60 - Single-Sided Airtight Sealing Tape - 60mm x 40m roll - Box of 10 rolls
Guide Price
Brand: SIGA Model: 60mm x 40m roll - Box of 10 rolls
Delivery Time: 3 - 5 days
SIGA Sicrall 60 - Single-Sided Airtight Sealing Tape - 60mm x 40m roll - Box of 10 rolls
SIGA Sicrall 60 is a high‑performance single‑sided adhesive tape designed for creating durable, airtight seals on vapour control layers, membranes, and panel joints on the warm side of the building envelope. It provides long‑term adhesion on smooth and slightly rough substrates, ensuring reliable ai..
Guide Price: £309.61
£371.53 inc VAT
This product is listed in the following categories and systems (click to show).