Last month I saw two doors we fitted two years ago on the same south-facing villa entrance. One used an interior-grade finish because the owner wanted to save there, and its edges had started lifting. The other, with composite panels, looked unchanged. That is the whole argument for composite cladding: the surface has to match the weather the door will actually see.
How the panel is made
Cellulose-based layers are saturated with phenolic resin, stacked, and pressed at high temperature and high pressure until they stop behaving as separate sheets and become one rigid plate. A printed decor layer and a wear-resistant overlay go on top. Panel thickness runs from 3 to 10 mm; door faces usually use 6 mm and above, because thickness is what gives the leaf its stiffness.
Why it suits exterior openings
Because the core is resin-saturated, the panel does not absorb water. No swelling after rain, no blistering in humidity, no lifting at the edges. The overlay resists UV, so colour holds over years rather than seasons. Salt-laden coastal air does not attack the surface. Those three properties together are why composite is the default specification for villa and lobby entrances with no canopy.
Bonding to steel
The panel bonds to a prepared leaf face rather than to bare sheet. Steel and composite do not expand at the same rate, so free movement is allowed at the panel edges and the adhesive is chosen to stay elastic. Edges are closed with aluminium profile, stainless lipping or matching edge banding. Where no edge closure is used, the panel section stays visible, and on dark panels that dark line is sometimes a deliberate design detail.
Appearance options
- Timber tones such as walnut, oak and teak without the maintenance of real veneer.
- Solid colours including matt anthracite, white and grey, with anti-fingerprint matt variants.
- Concrete and stone textures for contemporary facades.
- Two-tone builds with a dark exterior and light interior face, common across our composite door range.
The limits
Composite does not solve everything. The panel is hard, so a deep impact cannot be repaired locally and the panel is replaced instead. It weighs more than interior cladding, which pushes leaf weight toward three bearing hinges. All cutting and drilling has to happen in production; drilling later for an intercom or smart lock leaves a chipped edge. It costs more than membrane finishes, and on exposed openings the service life closes that gap.
Composite with glazing
On villa and lobby entrances composite panels usually work alongside glass. Glazed sections must be tempered, and the framing profile between panel and glass is sloped so water drains outward. As panel width grows in side-light and transom compositions, a rear reinforcement profile is added. Across our glazed villa doors we balance panel and glass area by exposure, reducing glass on wind-loaded facades.
Cleaning and ordering
The surface is non-porous, so a damp cloth and neutral detergent are enough. Abrasive powders, wire pads and solvent cleaners dull the overlay, and polish on matt surfaces leaves patches. Check edge profiles and glazing gaskets once a year so water cannot reach behind the panel. For export orders, tell us the facade orientation and exposure along with openings in centimetres; doors ship crated from Istanbul by road or container.
