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SKU: MX109-4
Iris 4 Inch Modern Exterior Window & Door Trim
$28.18 per 8' Length ($3.52/Ft)
The Iris 4 is a 4 inch modern flat exterior window and door trim with a clean rectangular profile.
A flat 4 inch face and 1 inch depth give openings a crisp, minimal border with the look of cut limestone. It suits contemporary homes and standard window sizes where subtle definition is the goal.
Flat trim in wood or PVC can warp, cup and show every joint. The Iris 4's cement-coated composite stays flat through freeze-thaw cycles, and fire-rated options tested to ASTM E-84 (Class A) are available. It can be curved into arches, and the Iris also comes in 6 and 8 inch widths.
Material Summary
- Core: Lightweight EPS foam core (ASTM C578 Type I)
- Reinforcement: Alkali-resistant fiberglass mesh
- Finish: Polymer-modified cementitious coating, approx. 3/16 in thick
Engineered for near-zero joint expansion and moisture-inert performance.
Technical Specifications +
Profile: 4 inches high, 1 inch top depth, 1 inch bottom depth.
Core Material: EPS foam core (ASTM C578 Type I) with a polymer-modified cementitious coating, approx. 3/16 in thick, reinforced with alkali-resistant fiberglass mesh.
Moisture & Movement: Moisture-inert core that won't rot; near-zero joint expansion; designed for freeze-thaw exposure.
Weight: A fraction of the weight of precast concrete. Standard lengths can be installed by one person, with no heavy wall reinforcement or lifting equipment.
Installation: Exterior adhesive, with mechanical fasteners where the Mouldex installation guidelines require. For stucco, EIFS, brick, stone veneer, siding and ICF.
Finishing: Arrives in a uniform cement-gray finish. Prime, then paint with a quality exterior acrylic latex paint or texture.
Fire: Fire-rated options are available on request with a Class A fire rating (flame spread 25, smoke developed 110) that helps meet ASTM E-84 and UL 263.
Customization: CNC-cut to custom profiles, arches and ellipticals, typically within 7 to 10 business days of design approval.
Exterior Moldings Summary
Inorganic Composition
Moisture-inert. Won't rot or warp, and less susceptible to cracking.
Versatile Compatibility
Expertly bonds to Brick, Stone, Stucco, Vinyl, and ICF.
Bespoke Customization
Custom profiles, including arches and curves.
Unmatched Finish
Mimics smooth-sanded wood or textured masonry with ease.
Lifetime Stability
Dimensionally stable through freeze-thaw and seasonal swings.
Weight Efficiency
A fraction of the weight of stone. Usually no structural upgrades needed.
EXTERIOR PERFORMANCE COMPARISON
| Attribute | Mouldex Exterior Mouldings | Pre-Cast Concrete | Wood | PVC / Polyurethane |
|---|---|---|---|---|
| Weight | Ultra-Light (a fraction of the weight of precast) | Extremely Heavy | Moderate | Light |
| Durability | Polymer-Cement (Impact Resistant) | Masonry (Brittle) | Prone to Rot/Warp | High Expansion |
| Installation | 1-Person / No Cranes | Crane / Structural Ties | Skilled Carpentry | Standard Mechanical |
| Maintenance | Primed & Painted; Low Upkeep | Patching / Re-sealing | Painting / Staining | Fading / Chalking |
Additional Comparison: Foam Core vs Cement Coated Moldings
Complete Exterior Moulding System Line
Our exterior mouldings are made to stand up to outdoor conditions while adding detail and protection to building facades, as a lightweight alternative to traditional exterior moulding materials such as precast concrete, wood, MDF and PVC. From window trim and door trim to window sills and crown and cornice mouldings, every profile shares the same moisture-inert core, near-zero joint expansion and low-maintenance finish.
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Request a quote. Order a free sample kit. Or call/live chat with us about your project.
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