Plain Border Profiles Selection and Installation Guide

Plain borders manufactured by Polure utilize high-density rigid polyurethane featuring a closed-cell formulation. The production density ranges between 150-220 kg/m³ (production target ~160 kg/m³) and 150-220 kg/m³ (production target ~160 kg/m³), with an average manufacturing target of 150-220 kg/m³ (production target ~160 kg/m³). This high density ensures high impact resistance while remaining light enough for efficient international transport across European distribution channels.

Technical performance characteristics include:

• Water absorption rates remain strictly below 1 percent, preventing swelling or decay in high-humidity areas.
• Operational thermal resistance spans from -100 °C / +80 °C, enabling stability in both freezing northern climates and warm southern regions.
• Profiles are purely decorative architectural elements and carry zero structural load capacity.

Selecting appropriate plain border dimensions requires evaluating room scale, wall height, and local architectural design norms. In standard European residential spaces with ceiling heights between 2.40 meters and 2.70 meters, plain border widths from 40 millimeters to 80 millimeters maintain proper visual balance. Larger commercial spaces or historic building restorations with ceilings exceeding 3.00 meters demand wider profile cross-sections ranging from 100 millimeters to 150 millimeters.

Logistical factors also influence cross-section selection. Flat, compact plain border shapes stack efficiently in export packaging, reducing overall freight volume and minimizing transport damage during cross-border transit within European logistics networks.

Accurate material calculation prevents project delays and reduces physical waste on the job site. To determine the necessary quantity of plain borders, measure the perimeter or total linear length of all planned wall sections using a metric measuring tape.

Key material calculation steps include:

• Calculate the total linear meters required for the complete room framing.
• Add a mandatory 10 percent to 15 percent material safety allowance to cover 45-degree miter cuts and end trimming.
• Align required quantities with standard 2.0-meter profile packaging units to optimize shipping handling and reduce transport breakage risks.

Installing plain borders requires a strictly clean, dry, and dust-free substrate to guarantee adhesive adhesion. Cut the profile ends at precise 45-degree angles using a fine-toothed miter saw. Apply specialized polyurethane (PU) assembly adhesive along the rear contact tracks. The use of standard silicone adhesive is strictly forbidden because silicone lacks the shear strength required for long-term rigid polyurethane bonding.

Mechanical fastening is mandatory alongside adhesive bonding. Drive corrosion-resistant screws or mechanical fixings through the plain border into the wall substrate every 40 to 50 centimeters. Mechanical anchors prevent profile movement or sagging while the polyurethane adhesive fully cures across fluctuating indoor temperatures.

Polyurethane plain borders leave the factory with a white primer layer pre-applied to the surface. Depending on the final paint formulation selected, applying an additional surface primer is optional but can improve paint adhesion in demanding environments. After mechanical installation, fill all screw countersinks and miter joints with acrylic filler, allowing it to dry before sanding smooth with 180-220 grit sandpaper.

For interior projects, apply two coats of water-based acrylic or latex paint. For exterior facade installations across European climate zones, applying a high-grade UV-resistant exterior paint is mandatory to shield the polyurethane structure from sunlight degradation and discoloration.

Before ordering plain borders for European commercial or residential projects, review the technical product documentation to ensure compliance with project requirements. Verify density metrics, shipping dimensions, and substrate compatibility prior to procurement.

Avoid these critical installation mistakes:

• Relying solely on silicone adhesive instead of dedicated polyurethane construction adhesive.
• Omitting mandatory mechanical screw fixings spaced at 40 to 50 centimeter intervals.
• Failing to apply UV-resistant paint when installing plain borders on exterior building envelopes.
• Subjecting plain borders to structural weight or load-bearing applications.