Breathable Roofing Underlayment Nonwoven — Waterproof Vapour-Permeable Membrane India
Breathable roofing underlayment nonwoven is a waterproof, vapour-permeable membrane installed under roof tiles, slates, and metal roofing panels. It blocks wind-driven rain and liquid water penetration while allowing water vapour from inside the building to escape — preventing condensation, mould, and insulation saturation. Favourite Fab supplies PP spunbond and SMS composite roofing underlayment in 80–150 GSM, laminated with breathable microporous membrane for Indian construction market and export.
Browse our full range: View all nonwoven fabric products — spunlace, spunbond, SMS, bico — with GSM, width and certification options. B2B MOQ from 500 kg.
Specifications
Product: Breathable Frontal Tape
| Property | Specification |
|---|---|
| GSM | 80–150 GSM |
| Construction | PP spunbond + breathable PE membrane laminate |
| MVTR | >1,000 g/m²/day (EN ISO 12572) |
| Hydrostatic head | >200 cmH₂O (AATCC 127) |
| UV stability | 6 months exposed (EN 13859-1) |
| Width | 1–1.5 m (standard roll) |
| MOQ | 500 kg |
Applications
Product: Breathable loop Frontal tape
Product: Breathable laminated non woven fabric for silica gel packing
Product: Breathable Fabric
Pitched roof underlayment (under tiles/slates), metal roof sarking membrane, flat roof vapour barrier, wall wrap air/moisture barrier, green roof drainage layer.
FAQ
Product: Breathable Diaper Side Tape
What MVTR is required for roofing underlayment?
EN 13859-1 classifies roofing underlayments by vapour resistance (Sd value). Breathable membranes: Sd <0.3m (highly breathable). Our spunbond/PE laminate achieves Sd 0.05–0.15m — suitable for fully breathable roof construction without vapour barriers.
Can Favourite Fab supply roofing underlayment in printed rolls?
Yes. Custom printing with contractor brand, technical specifications, and installation direction arrows available. Minimum 2,000m per printed design.
Full range: spunbond nonwoven fabric manufacturer India. Related: PET spunbond nonwoven fabric.
B2B Applications & End-Uses
Breathable roofing underlayment — also referred to as vapour-permeable roofing membrane or breather membrane — is a critical component of the modern ventilated building envelope. Its function is fundamentally different from traditional bituminous felt: it allows water vapour generated inside the building to diffuse outward through the roof construction, preventing interstitial condensation within the insulation layer, while simultaneously providing a second line of waterproof defence against wind-driven rain, snow melt infiltration, and rainwater that bypasses tile or panel joints.
Tiled roof applications — including ceramic tile, concrete tile, and natural slate — require an underlayment installed directly over rafters or sarking boards beneath the tile batten, where it must withstand construction traffic (temporary foot loading), staple or nail penetration from battens, and sustained exposure to UV during the construction phase before tiles are laid. UV stabilisation of the PP spunbond or SMS facing is therefore a specification requirement rather than an option. In insulated roof systems where the insulation layer is in contact with the underlay, the WVTR (Water Vapour Transmission Rate) must exceed 1,000 g/m²/day to allow moisture-laden air from the building interior to escape without condensing on the cold underside of the tile.
Metal roof deck applications — standing seam steel, aluminium, or zinc roofing — present a more demanding acoustic and thermal environment. Breather membrane installed beneath metal panels prevents the drumming noise of direct condensation drip onto steel decking and provides a slip plane that accommodates metal thermal expansion. Industrial buildings, warehouses, cold stores, and logistics facilities with large metal roof areas represent a significant procurement volume from roofing contractors and building envelope subcontractors.
Export demand from the GCC construction sector (Saudi Arabia, UAE, Qatar) and EU markets (Germany, France, Netherlands) for EN 13859-1 compliant breather membrane is growing, driven by rising insulated roof system adoption in commercial and residential construction. Favourite Fab’s SMS with microporous film laminate meets EN 13859-1 class W1 waterproofing requirements and provides documentation for CE marking support for importers in EU markets.
Certifications & Quality Assurance
Breathable roofing underlayment is tested and certified to EN 13859-1 (Flexible sheets for waterproofing — Underlays for discontinuous roofing), which specifies requirements for water penetration resistance (hydrostatic head, EN 20811), water vapour transmission (ISO 12572 / EN ISO 1931), tensile strength and elongation (EN 12311-1), nail/staple tear resistance (EN 12310-1), and UV resistance after artificial weathering (EN 1297).
Hydrostatic head is tested per EN 20811 — our standard membrane grades achieve >200mm H2O (classified W1), and high-performance grades reach >500mm H2O for exposed underlayment applications on low-pitch roofs. WVTR is verified per EN ISO 1931 (wet-cup method) at 23°C / 50% RH differential, with values reported in g/m²/day. Dimensional stability after thermal cycling is tested to EN 1107-1 to confirm that the membrane does not shrink or distort when installed under roof battens in high-temperature attic environments common in Indian and GCC climates.
Each production batch is assigned a unique roll serial number linked to the QC record for all measured parameters. Export documentation including EN 13859-1 test reports from third-party NABL/ISO 17025 accredited laboratories is provided with commercial shipments to EU buyers. BIS conformity documentation for IS-specified equivalents is available for domestic government project procurement.
More Questions Answered
What is the minimum WVTR required for breathable roofing underlayment used with mineral wool insulation?
For well-insulated roof constructions using mineral wool or glass wool batts, a minimum WVTR of 1,000 g/m²/day is the broadly accepted threshold to ensure adequate vapour drive outward, though some national building codes (notably UK NHBC standards and German DIN 4108) specify higher minimums for cold climate applications. In hot-climate markets such as India and GCC, the vapour drive reversal effect (outward vapour push in monsoon/humid season, inward in dry season) means the membrane’s vapour permeance class should be matched to the specific climate zone. Our technical team can advise on the appropriate Sd value (equivalent air layer thickness) for your project’s climatic and construction context.
Can breathable roofing membrane be supplied in fire-retardant grades for industrial building applications?
Yes — fire-retardant (FR) grades meeting EN 13501-1 Class E or Class D reaction-to-fire classification are available in SMS and laminate constructions. FR grades are typically specified for industrial, logistics, and public building roof applications where building regulations require limited-combustibility materials in the roof void. Flame-retardant additive systems used are halogen-free for RoHS-compatible projects, and the specific fire classification achieved is documented in third-party test reports provided with the product. Please confirm the required fire class and national building regulation reference when enquiring.
Gaurav Garg
I'm Gaurav Garg, CEO of Favourite Fab, a company on a mission to revolutionize the nonwoven industry with sustainable practices. We work hand-in-hand with manufacturers and suppliers who share our commitment to eco-friendly production. With a deep interest in textile innovation, I'm passionate about educating consumers about sustainable material options and their potential to transform the nonwoven landscape.
