







Polyurethane Curved Door and Window Pediment Crown Profile
Technical Specifications
| Material | Polyurethane |
|---|---|
| Surface | Layered, molded-profile flat and smooth crown surface |
| Color | White |
| Density | 150-220 kg/m³ |
| Water Absorption | below 1% |
| Dimensional Stability Test | -20 °C / +70 °C |
| Fire Class | B2 (DIN 4102-1) |
| Paintable | Yes |
| Usage | Indoor + Outdoor |
| Water Resistant | Yes |
| Dimensions | 108 × 2400 × 422 mm |
| Weight | 5.88 kg |
| Sales Unit | piece |
Details
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Technical drawing: Download DWG (108 KB)
- DWG Library
- Polyurethane Window Crown Selection and Installation Guide
- Polyurethane Pediments Selection and Installation Guide
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- Contact
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Similar Products(Architectural Pediments and Crowns)
The P1470A is a premium architectural crown designed to elevate door and window frames with a stately, classical arch motif. Featuring a curved central dome that transitions smoothly into sleek horizontal wings, this decorative element adds structural depth and classical symmetry to any building facade or grand interior portal. It acts as an elegant architectural statement, transforming standard openings into high-end design features.
Manufactured from high-density rigid polyurethane (150-220 kg/m³), this pediment offers the structural integrity and crisp detailing of traditional wood without the susceptibility to environmental decay. Measuring 2400 mm in width, 422 mm in height, and with a projection depth of 108 mm, it is engineered for substantial visual impact. Its closed-cell structure ensures a water absorption rate of less than 1%, rendering it highly resistant to rotting, swelling, warping, or insect infestation under extreme weather conditions.
The visual profile of the P1470A is defined by its clean, smooth, multi-layered step moldings that trace the gentle sweep of the central arch. This lack of heavy, ornate floral carvings makes it highly versatile, successfully bridging the gap between classical Neoclassical architecture and clean-lined modern transitions. The factory-applied base primer provides a uniform, smooth surface that optimizes paint adhesion for a flawless final finish.
This decorative architectural pediment is primarily utilized to crown exterior window frames, main entrance doors, and porticos on high-end residential villas, boutique hotels, and historical restorations. Indoors, it serves as a dramatic overdoor decorative header in spacious hallways, high-ceilinged living rooms, or grand ballroom entrances, creating an immediate sense of architectural purpose and luxury.
Compared to heavy cast concrete, plaster, or high-maintenance timber, this lightweight polymer alternative significantly reduces structural load on the building envelope and simplifies installation. The process involves securing the pediment with a polyurethane (PU) mounting adhesive combined with mechanical screws for permanent stability. The joints and screw heads are then easily filled, sanded, and coated with a high-quality topcoat.
The P1470A offers an enduring, low-maintenance decorative solution that retains its crisp profiles over decades of exposure. While the factory-applied primer prepares the surface, applying an additional primer compatible with your chosen paint system is optional but recommended to meet specific paint manufacturer warranties, as Polure does not accept liability for third-party paint performance.
- The P1470A pediment is designed for prominent architectural crowning in both interior and exterior settings
- On exterior building facades, it is installed directly above window frames and main entrance doors to draw the eye upward and provide a weather-shielding visual projection
- It is highly effective on Mediterranean, Georgian, and Neoclassical villa designs
- For interior spaces, it creates a luxurious transition when mounted above double doors, library entrances, or fireplace mantels in high-ceilinged reception rooms
- It can be paired with vertical pilasters or side columns to form a complete, cohesive portal frame
- For outdoor applications, finishing with a UV-resistant exterior paint is mandatory to protect the polymer structure from solar discoloration
- Ensure the installation surface is dry, clean, and structurally sound
- Measure and mark the exact placement of the P1470A pediment
- Apply a generous bead of high-quality polyurethane (PU) mounting adhesive to the rear mounting surfaces of the profile
- Position the pediment and secure it mechanically using corrosion-resistant screws to ensure immediate and long-term stability; mechanical fastening is mandatory due to the product's dimensions
- Fill all screw holes and joint transitions using a high-quality exterior-grade acrylic filler
- Once dry, sand the filled areas smooth with 180-220 grit sandpaper
- While the product comes factory-primed, applying a paint-manufacturer-approved primer before coating with two layers of premium water-based or synthetic paint is recommended for optimal durability
- Maintaining the pristine appearance of the P1470A pediment is highly straightforward
- For interior applications, occasional dusting or wiping with a damp, non-abrasive cloth is sufficient
- For exterior installations, the surface can be gently washed with low-pressure water to remove environmental dust and soot
- Avoid high-pressure power washing at close range and do not use harsh chemical solvents or abrasive cleaners that could damage the paint film
- To ensure maximum longevity outdoors, perform a visual inspection of the paint work every few years and reapply a UV-resistant topcoat if signs of weathering appear
Can the P1470A pediment be installed on exterior building facades?
Yes, the P1470A is highly suitable for exterior applications. Made from rigid polyurethane with a density of 150-220 kg/m³, it has a closed-cell structure with less than 1% water absorption, preventing rot, warping, or cracking from moisture. For outdoor durability, it must be finished with a UV-resistant exterior paint to prevent yellowing.
How is this pediment mounted securely given its 240 cm width?
Due to its 2400 mm width, secure mounting requires a combination of chemical and mechanical fastening. Apply polyurethane (PU) mounting adhesive to the back, press it into place, and secure it permanently using heavy-duty screws. Fill the screw heads with acrylic filler, sand smooth, and paint.
Does the product require an extra primer before painting?
The P1470A comes with a factory-applied primer that prepares the surface for paint adhesion. However, because paint manufacturers often only guarantee their products when used over their own specific primers, applying an additional primer layer is optional and depends on your paint brand's specifications.
How does polyurethane compare to plaster or wood pediments?
Polyurethane is significantly lighter than plaster or cast stone, eliminating heavy structural loading on your walls. Unlike wood, it does not rot, swell, attract insects, or split over time. It offers the crisp detail of carved wood with the weather resistance of synthetic polymers, making it far easier to install and maintain.
Can I cut or customize the width of this pediment?
Yes, polyurethane can be cut, drilled, and sanded using standard woodworking tools. If the 2400 mm width is too wide for your window or door, the horizontal side wings can be trimmed symmetrically to achieve your desired dimensions before installation.



