What is Window Trim? Understanding Surrounds, Sills, and Architraves
In everyday language, window trim broadly refers to the framing surrounding a window opening. However, in architectural terminology, this surround consists of distinct components, which often leads to confusion:
| Term | Description | Location |
|---|---|---|
| Window Surround | The complete decorative frame encapsulating the wall opening | Exterior facade |
| Window Sill | The sloped bottom profile that deflects rainwater away from the wall | Exterior facade |
| Header / Lintel | The horizontal top trim defining the upper border | Exterior facade |
| Casing / Architrave | The slim decorative trim covering the seam between wall and frame | Interior |
In short: On exterior facades, window trim typically describes a complete window surround kit, whereas indoors, it refers to the slim casing framing the window or door joinery.
Our profile size range is dynamically updated: 46 × 62 mm - 542 × 846 mm. Products are manufactured within a 150-220 kg/m³ (production target ~160 kg/m³) density range, feature a water absorption level below below 1%, and are delivered white 1K acrylic primer.
Defining the architectural character and visual elegance of facades, window surrounds are reinterpreted with Polure’s high-density rigid polyurethane technology. Overcoming the limits of traditional building materials, Polure Surrounds deliver solutions that exceed the expectations of architects and property owners. With a high-density (150-220 kg/m³) structure offering firmness comparable to hardwood, they eliminate the heavy installation labor of marble and the fragility of plaster. These products enhance facade prestige while providing reliable exterior protection.
Architectural Diversity and Design Versatility
The Polure Surround collection accommodates a broad spectrum of architectural styles. From grand classical villas to clean-lined modern residences, every project gains a tailored aesthetic touch. Compact profiles like P1454 and P1461 highlight subtle details, whereas wider mouldings like P1460, P1460M10, and P1460M40 add dramatic emphasis on grand facades and commercial structures. Specialized profiles such as P1456D create deep, dynamic framing that elevates overall building aesthetics. Precision-engineered by Polure, every piece features crisp detailing and exact dimensions for seamless installation across your project.
Durability and Superior Material Properties
Polure Surrounds excel in demanding exterior weather conditions. Their closed-cell structure keeps water absorption under 1%, ensuring total moisture resistance that prevents cracking or swelling from freeze-thaw cycles. They maintain structural integrity within a service temperature range of -100 °C / +80 °C. Exceptional dimensional stability prevents shrinkage, expansion, or warping over time. Supplied factory-primed, they retain their original appearance for years when finished with UV-resistant exterior paints. Furthermore, their fire-retardant, self-extinguishing composition contributes to passive building safety.
Thermal and Acoustic Insulation Benefits
Window surrounds serve as functional energy barriers in addition to decorative elements. Window and door perimeters are common thermal bridges on building envelopes. Polure Surrounds create an additional insulating layer around openings, improving overall energy efficiency and indoor climate comfort. They also help dampen external sound transmission for quieter living spaces. Their lightweight nature enables quick, straightforward handling, reducing site labor costs.
- Modular Configuration: Combine various surround profiles and decorative accents to create customized window and door frames.
- Easy Repairability: In case of surface impact, profiles can be easily filled, sanded, and repainted for long-lasting performance.
- Eco-Conscious Design: Durable construction and low maintenance requirement contribute to sustainable building practices.
Usage Areas
Polure Surrounds offer versatile application possibilities across interior and exterior architecture. Outdoors, they are essential for framing windows and doorways with refined architectural contours. They are widely specified in villas, boutique hotels, and historic restoration projects to establish a classic or contemporary identity while shielding joinery seams from rainwater infiltration. They are also ideal for reinforcing vertical building corners and creating unified facade elevations alongside string courses and corbels. Indoors, these profiles function as elegant door casings, niche borders, wall panel frames, or ceiling perimeter trim. Models like P1457 and P1459 add architectural depth when framing mirrors, headboards, or accent wall panels in lobbies, restaurants, and hotel suites. Additionally, their durability makes them excellent for specialized applications such as elevator door surrounds.
Installation
Installing Polure Surrounds is straightforward when following proper procedures. Ensure the installation surface is clean, dry, structural, and dust-free prior to mounting. Cut profiles to size with a 45-degree miter saw. Use high-strength polyurethane-based adhesives like Polure Polfix; silicone-based products must never be used. Apply adhesive evenly along the rear mounting channels and press firmly onto the substrate. For exterior installations, mechanical fastening with stainless screws is required alongside adhesive bonding to ensure absolute stability. Fill all joints and screw heads with exterior-grade filler. Once cured, sand smooth using 180–220 grit sandpaper. Complete the installation by applying two coats of UV-resistant exterior paint (or water-based/synthetic paint for indoor projects) over the factory primer.
Care Information
Polure Surrounds require minimal maintenance while maintaining structural and visual performance for decades. Their high-density closed-cell structure renders them impervious to rot, mold, moisture, or insect damage. Routine cleaning requires only a damp cloth and mild soap; avoid abrasive chemicals. For exterior installations, repainting the surrounds in line with the building's standard repainting schedule (typically every 5 to 10 years) keeps the surface looking fresh. Should accidental surface damage occur, the area can be easily repaired with acrylic filler, sanded flat, and spot-painted. This simple upkeep preserves both appearance and long-term asset value.
Sizes and Prices
| Product code | Size (W × L × H) |
|---|---|
| P1458 | 30 × 2400 × 161 mm |
| P1454 | 40 × 2400 × 160 mm |
| P1475 | 42 × 2400 × 361 mm |
| P85402 | 46 × 2400 × 62 mm |
| P81373BU | 47 × 2400 × 163 mm |
| P14D20 | 49 × 2400 × 127 mm |
| P85401 | 49 × 2400 × 70 mm |
| PM10 | 50 × 85 × 100 mm |
| P14D25 | 60 × 2400 × 160 mm |
| P14D30 | 72 × 2400 × 194 mm |
| P14D40 | 90 × 2400 × 255 mm |
| P1464 | 97 × 2400 × 200 mm |
| PM40 | 102 × 1200 × 366 mm |
| P1470 | 108 × 2400 × 150 mm |
| P14D50 | 110 × 2400 × 320 mm |
| P1465 | 133 × 2400 × 300 mm |
| P1456 | 137 × 2400 × 2000 mm |
| P1456D | 137 × 2400 × 2000 mm |
| P14D60 | 140 × 2400 × 385 mm |
| P1461 | 150 × 2400 × 365 mm |
| P1474 | 166 × 2400 × 227 mm |
| P1477 | 177 × 2400 × 715 mm |
| P1462 | 184 × 2400 × 437 mm |
| P1472 | 193 × 2400 × 302 mm |
| P1457 | 195 × 2400 × 260 mm |
| P1459 | 195 × 2400 × 195 mm |
| P1473 | 240 × 2400 × 540 mm |
| P1462A | 260 × 2400 × 567 mm |
| P1460 | 542 × 2400 × 480 mm |
| P1460M10 | 542 × 2400 × 480 mm |
| P1460M40 | 542 × 2400 × 846 mm |
