High-Performance Glass Mat Faced Sheathing for Exterior Wall Systems

Product Overview

Nosso Fiber-Reinforced External Gypsum Board is a premier engineered solution designed for modern building envelopes. Unlike standard gypsum boards, this panel features a high-density, moisture-resistant core integrated with a matrix of chopped glass fibers, shielded by a high-strength, non-woven fiberglass mat on both surfaces.

It provides an exceptionally stable and durable substrate for EIFS (Exterior Insulation and Finish Systems), brick veneer, stone cladding, and various architectural coatings.

Core Technology: “Inside-Out” Protection

1. Structural Fiber-Matrix Core

Enhanced Internal Reinforcement: The gypsum core is infused with a high concentration of glass fibers, creating an internal “skeleton” that significantly boosts flexural strength and structural rigidity.
Toughness & Impact Resistance: This reinforced internal matrix allows the board to absorb energy from physical impacts, reducing the risk of cracking during transportation and installation.
Dimensional Stability: The fiber-locked core ensures the panel maintains its shape and integrity even when subjected to temperature fluctuations and humidity changes.

2. Inorganic Glass Mat Surface

Weather-Resistant Barrier: The non-woven fiberglass mat is deeply embedded into the core, providing a rugged surface that resists UV radiation and heavy rain.
Superior Mechanical Bond: The textured surface is specifically engineered to provide excellent adhesion for base coats, adhesives, and waterproofing membranes.

Key Performance Benefits

Extended Exposure Rating: Engineered to remain stable and functional even when exposed to outdoor elements for several months during the construction phase.
Superior Mold & Moisture Resistance: Made with inorganic materials that do not support the growth of mold or mildew, even in humid environments.
Non-Combustible Core: The natural properties of the gypsum core provide a high level of fire safety for commercial and residential buildings.
Vapor Permeability: The breathable nature of the board allows moisture within the wall cavity to escape, protecting the building’s structural health and preventing condensation.

Technical Details

Feature	Description
Standard Thickness	12.5mm / 15mm (Customizable)
Core Composition	Fiber-Reinforced Water-Resistant Gypsum Matrix
Surface Material	High-Strength Non-woven Glass Mat (Front & Back)
Edge Profile	Tapered Edge
Water Resistance	Low water absorption core for exterior durability
Mold Resistance	Inorganic surface prevents mold growth
Fire Performance	Inherently non-combustible gypsum core

Applications

EIFS & Stucco Systems: Providing a flat, high-adhesion base for insulation boards and finish layers.
Rainscreen & Cavity Walls: Used as a durable sheathing behind various siding materials.
Exterior Soffits & Ceilings: Ideal for sheltered outdoor areas like balconies, porches, and walkways.
High-Moisture Interior Areas: Also suitable for indoor environments with extreme humidity, such as swimming pool enclosures.

Installation & Handling Tips

Easy Cutting: The board can be easily scored and snapped with a standard utility knife—no specialized power tools required.
Fastening: Use high-quality, corrosion-resistant screws to ensure long-term attachment to the framing.
Joint Protection: We recommend sealing all joints and fastener heads with compatible waterproofing tapes or liquid membranes to ensure a fully weather-tight envelope.
Handling: Panels should be stored flat on a level surface and protected from direct ground moisture before installation.

FAQ (Product Knowledge)

Q: Can this board be used for interior applications? A: While designed for exteriors, it is excellent for high-moisture interior areas like commercial kitchens or swimming pool enclosures where maximum mold protection is required.

Q: Does it require a separate water-resistive barrier (WRB)? A: Although the board is highly water-resistant, we recommend applying a WRB or sealing the joints per local building codes to ensure a fully airtight architectural envelope.

Q: Is it compatible with all types of exterior finishes? A: Yes, it is compatible with most EIFS adhesives, mechanical fasteners, and fluid-applied membranes.