Reflect the heat.
Seal the roof.
Protect what's under it.
ACC Weathering Membrane is a self-adhesive, six-layer aluminium & butyl membrane engineered to reflect solar radiation, waterproof the roof deck, and resist corrosion — in a single peel-and-stick layer. Terrashield Roofing brings it to builders, contractors and specifiers across the USA.
The 6-layer ACC construction — exposed face to substrate
Why roof surface matters more than roof color
Most roofing surfaces absorb solar energy rather than reject it. That absorbed energy becomes heat — heat that raises deck temperature, drives cooling loads, and accelerates material fatigue. A highly reflective surface changes that equation at the point of contact: the roof itself.
Conventional Roof Surface
ACC Reflective Surface
Reflect. Seal. Protect.
Reflect
A reflective aluminium face engineered to turn away solar radiation before it becomes stored heat in the roof assembly. Tested to ≥0.80 solar reflectance under ASTM C1549.
Seal
A continuous, self-adhesive butyl layer bonds to the substrate, closing seams, laps and penetrations to form a monolithic waterproofing barrier — not a coating that can pond, crack or peel.
Protect
An anti-corrosion coated surface built to withstand acid-rain exposure, UV degradation and accelerated weathering — protecting the substrate beneath it over years of exterior exposure.
Heavy Duty
Prolonged exposure to harsh weather conditions
Easy Cleaning
Low-maintenance reflective surface
Waterproofing
Solves the leaking issue at the source
High Reflectance
Excellent thermal performance
Sound Dampening
Noise reduction on metal roofs
Anti-Corrosion
Resists rust and acid-rain attack
Inside the 6-layer ACC construction
Every layer of ACC Weathering Membrane performs a distinct mechanical or thermal function — from the exposed anti-corrosion face down to the release film removed at installation.
Anti-Corrosion Coating
01The exposed weathering face. Formulated to resist acid-rain corrosion, chalking and UV degradation under prolonged exterior exposure.
Reflective Aluminium Foil
02Delivers the membrane's high solar reflectance — ≥0.80 under ASTM C1549 — turning away radiant energy at the surface.
Film
03A polymer film layer bonding the reflective foil to the reinforcement below, contributing tensile and tear performance.
Reinforced Non-Woven
04Provides mechanical reinforcement — tensile strength ≥325 N/50mm (MD) and tear resistance up to 35N, per ISO 9073.
High-Performance Butyl Adhesive
05A high-tack butyl layer that forms continuous, self-sealing adhesion to primed roofing substrates — the membrane's waterproofing core.
Release Film
06Protects the butyl adhesive prior to installation. Removed on-site immediately before the membrane is applied.
Why surface reflectance changes the equation
A dark, low-reflectance surface absorbs the majority of incoming solar radiation. A high-reflectance surface like ACC is engineered to turn a significant proportion of that same radiation away before it is absorbed. This is a conceptual illustration of the principle — not a measured temperature differential.
Illustrative comparison only. Actual roof-surface and interior temperatures depend on climate, roof assembly, insulation and ventilation.
Weathering & durability performance
ACC is tested against recognized industry standards for solar reflectance, tensile performance, corrosion resistance and accelerated weathering.
Backed by a manufacturer warranty on material performance. Confirm current warranty terms and coverage for U.S. installations with Terrashield Roofing.
Where ACC is applied
A self-adhesive membrane suited to commercial, industrial and metal roofing substrates where reflectance and waterproofing are both required.
Metal & IBR Roofing
Sheet-metal roofs of various profiles, ridge caps and roof sheet junctions.
Commercial & Industrial Roofs
Warehouses, logistics facilities and box-gutter detailing.
Flat Concrete Roofs
Concrete decks and roof joints requiring a continuous waterproof layer.
Solar PV Roof Areas
Membrane detailing around solar array mounting and roof penetrations.
Parapet Walls
Parapet and wall-to-roof transitions prone to water ingress.
Box Gutters & Reservoirs
High-wear waterproofing details including box gutters and water reservoirs.
Roof Refurbishment
Upgrading existing roofing substrates without a full tear-off.
New Construction
Specified at design stage for new commercial and industrial roof assemblies.
Installed on commercial and industrial roofs worldwide
A selection of completed ACC installations, from box-gutter waterproofing to large-format warehouse roofs.
Solar PV Roof Install — USA
Grain Silo Roof — USA
Bulk Water Reservoir — Concrete Joints
Greenacres Shopping Centre — Box Gutters
Floor Level Gutter
Ridge Cap Onto IBR Roof Sheets
Residential Concrete Roof
Mondelez / Cadbury's — Box Gutters
VX Logistics Warehouse — China
Norvatis Medical Warehouse — ChinaHow ACC compares to other roof approaches
An educational comparison — not every approach solves the same problem. Verify substrate compatibility and manufacturer claims for any product under consideration.
| Approach | ACC Membrane | Roof Paint | Roof Coating | Radiant Barrier |
|---|---|---|---|---|
| Solar reflection | ≥0.80 tested | Varies | Varies | Yes (radiant, not surface-applied) |
| Waterproofing | Continuous membrane | Limited / varies | Varies by system | Not an exterior waterproofing layer |
| Continuous surface | Yes — self-adhesive | Yes | Yes | Depends on installation |
| Mechanical membrane | Yes | No | No | Yes |
| Typical maintenance | Low | Recoat cycles | Varies | Low |
Installation overview
A simplified sequence for reference only. Installers should follow the official ACC installation manual, including surface primer requirements and detailing procedures.
Inspect the roof and identify substrate condition and detailing requirements.
Clean and prepare the substrate — degrease, sand if required, wipe free of dust.
Apply ACC Multi-Surface Primer and allow to cure (approx. 12 hours).
Position the membrane, remove the release film, and apply to the primed surface.
Roll firmly for full adhesion; detail laps, seams and penetrations; inspect the completed install.
Installation videos
Step-by-step application footage covering common roof types and details.
Box Gutter and Sheet Metal Roof Application
Watch on YouTube →
Sheet Metal Roof: Various Profiles | Flat Concrete Roof | Solar | Parapet Walls
Watch on YouTube →
Sheet Metal Roof: Solar PV Specific
Watch on YouTube →
Laminated roll specifications
Manufacturer-tested specifications for ACC Weathering Membrane, San Miguel Yamamura.
ACC Multi-Surface Primer
A one-pack multi-surface primer suitable for aluminium, galvanised steel, fibreglass, stainless steel, mild steel, wood, and previously painted surfaces. Applied prior to ACC Weathering Membrane installation.
Degrease and lightly sand the surface, wipe free of dust, apply primer, and allow roughly 12 hours to cure before applying ACC Weathering Membrane.
Download Primer MSDSManufacturing credibility behind the membrane
ACC Weathering Membrane is manufactured by San Miguel Yamamura, a 50-year producer of woven and laminated industrial materials operating within a major international packaging group. Terrashield Roofing holds distribution for the U.S. market — bringing an established, tested product to American builders, contractors and specifiers, backed by manufacturer testing data rather than roofing-industry claims alone.
Materials engineering, not roof-industry marketing
Documentation for specifiers & installers
Request the complete technical package — data sheet, installation guide and MSDS.
Talk to Terrashield Roofing about ACC
Request a sample, technical data, pricing, or ask about becoming a distributor in your region.