Decorative Facade Design: Moldings, Sills, and Brackets

Exterior polyurethane decoration relies on closed-cell rigid polyurethane formulation to ensure long-term structural integrity against weather exposure. Polure manufactures architectural profiles with an average density targeted at 160 kg/m³, operating strictly within the broader 150-220 kg/m³ (production target ~160 kg/m³) density range. This closed-cell cellular matrix restricts liquid water absorption to below 1%, preventing internal freeze-thaw cracking during severe winter conditions.

Material durability is tested across a broad service temperature range of -100 °C / +80 °C, ensuring dimensional stability under extreme heat or sub-zero climates. All architectural elements, including decorative columns, brackets, window sills, and architraves, are strictly non-load-bearing. They serve aesthetic functions only and must never be utilized to support structural loads, ceiling spans, or roof overhangs.

Systematic arrangement of facade elements requires strict adherence to vertical and horizontal geometric proportions. Window jambs and sills frame openings to define clear vertical axes, while horizontal belt courses visually divide building levels to maintain balanced scale across multi-story structures. Under-eave brackets offer visual support to roof projections, drawing inspiration from classical European masonry and traditional Ottoman cantilever designs.

• Window Frames and Sills: Surrounding window perimeters with structured moldings establishes shadow lines and diverts rainwater away from plaster surfaces.
• Belt Courses: Horizontal bands mounted at floor slabs break elevation height and conceal structural junction lines.
• Brackets and Corbels: Positioned under eaves or balconies to provide classical visual weight without adding structural gravity load.

Deploying decorative polyurethane elements across European construction sites requires consideration of packaging, transport logistics, and local building codes. Lightweight rigid polyurethane profiles significantly reduce transport weight compared to concrete or natural stone alternatives, minimizing freight energy costs and job site handling risks. Products leave the manufacturing facility pre-treated with a factory primer to protect surfaces during shipping.

Multi-country application demands consistency in installation techniques regardless of regional wall construction types, such as brick, exterior insulation finishing systems (EIFS), or aerated concrete. Because these profiles carry no load, structural calculations for the main building frame remain unaffected, simplifying municipal compliance approvals across different EU jurisdictions.

Correct installation of exterior polyurethane moldings requires a systematic two-part fixing protocol to prevent joint separation caused by building movement. All substrate surfaces must be completely clean, dust-free, and dry prior to profile fitting. Profiles are mitered at precise 45-degree angles using high-speed saw blades to yield tight visual joints.

Joints and rear contact surfaces must be bonded using a dedicated polyurethane (PU) assembly adhesive. Silicone-based sealants are strictly prohibited due to poor long-term adhesion and incompatibility with exterior paints. In addition to chemical bonding, mechanical fixing with stainless steel screws is mandatory. Screws must be driven into the substrate at calculated intervals, countersunk below the material surface, and filled prior to final sanding.

Achieving a durable finish on Polure decorative facade profiles requires proper surface preparation and chemical coating compatibility. After mechanical screws and joints are filled with exterior-grade putty, the entire surface must be smoothed using 180-220 grit sandpaper. While profiles are delivered with a factory-applied primer, applying an additional site-applied exterior primer layer remains optional based on specific regional paint system warranties.

The final step mandates the application of a topcoat using a high-grade, UV-resistant exterior paint system applied in two full coats. Uncoated polyurethane or non-UV-stabilized paint layers will degrade under direct solar radiation over time. Applying appropriate UV-protective topcoats guarantees color stability and weather protection within the designed operating temperature spectrum.