Exterior Window Header Trim
The exterior window header trim by Polure adds distinguished architectural framing and classical shadow detail above windows and exterior door openings. Manufactured from high-density rigid polyurethane (150-220 kg/m³), it delivers wood-like mechanical strength and impact resistance that will not dent during severe hail or storm conditions. Its closed-cell structure keeps water absorption under 1%, ensuring it will not rot, warp, split, or attract insects on exterior facades. Operating reliably across extreme temperature ranges from -100 °C / +80 °C, it carries a Class B2 fire safety rating. Delivered factory-primed with a smooth white acrylic technical coating, it requires painting with elastic, UV-resistant exterior paints. Installation involves a clean, dry facade surface, continuous PU assembly adhesive applied along wall contact edges and joints, and countersunk mechanical screws. Fill screw holes with facade filler, sand smooth with 180-220 grit, and finish with quality topcoat.
Frequently Asked Questions
What material is used in Polure exterior window header trim?
Polure exterior window header trim is made from high-density rigid polyurethane (150-220 kg/m³), providing wood-like strength, low weight, and B2 fire resistance.
Is exterior window header trim resistant to weather and hail?
Yes, with water absorption under 1% and high impact resistance, it will not dent in hail, rot, swell, or crack in temperatures from -100 °C / +80 °C.
How is exterior window header trim installed on facades?
It is installed using a dual system: continuous PU assembly adhesive applied to back surfaces and joint edges combined with countersunk screws. Silicone is strictly forbidden.
Does exterior window header trim require exterior paint?
Yes, while factory-primed with white acrylic primer, outdoor installation requires coating with elastic, UV-resistant exterior paint to prevent UV fading.