Door Header Relief
Polure door header reliefs accentuate doorways and window pediments with dramatic classical grandeur and sharp architectural relief. Engineered from high-density rigid polyurethane (150-220 kg/m³), these overdoor decorations deliver the tactile weight and impact resistance of carved timber without adding excessive weight to entrance frames. Featuring a closed-cell composition with water absorption below 1%, they are resistant to moisture, rot, and swelling in humid environments or exterior portals. Certified with B2 fire safety and thermal stability from -100 °C / +80 °C, each header arrives pre-primed with a smooth white acrylic primer. Installation is completed using continuous polyurethane assembly adhesive paired with countersunk screws for permanent stability.
Frequently Asked Questions
What material is Polure door header relief made from?
Polure door header reliefs are made from high-density rigid polyurethane (150-220 kg/m³), providing wood-like impact strength and B2 fire safety rating.
Can door header reliefs be installed on outdoor entrances?
Yes, with water absorption below 1% and thermal resistance from -100 °C / +80 °C, they are completely weather-resistant when finished with UV exterior paint.
How is a door header relief installed above a doorway?
Installation requires continuous PU assembly adhesive along contact edges combined with mechanical countersunk screws. Silicone is forbidden.
Does the door header relief require a primer before painting?
No, it is factory pre-primed with white acrylic primer. Lightly sand with 180-220 grit paper before applying your topcoat.
Will the door header relief crack over time?
No, unlike timber or gypsum plaster, high-density polyurethane will not split, shrink, or crack due to humidity or temperature shifts.