uPVC Door Panels & Replacements

uPVC Infill Door Panels and Back Door Replacements

Reinforced uPVC infill door panels provide cost-effective weatherproofing, high thermal insulation, and secure replacements for damaged or cracked exterior door leaves. Window Fitters Ltd supplies and installs replacement uPVC infill door panels, half-glazed back doors, and utility entrance doors across Greater London and Surrey from our Croydon HQ via structured travel tiers (<15m local at £540/day, 15-45m extended at £580/day, >45m outer Surrey with half-day minimum).

Every uPVC door panel is manufactured with vacuum-formed UV-stable outer skins, high-density insulating foam cores, and optional internal MDF/plywood security reinforcement boards conforming to Approved Document L energy efficiency and Approved Document K safety standards.

Multi-Layer Construction of uPVC Infill Panels

A high-specification uPVC door panel is an engineered sandwich composite panel designed for thermal insulation and impact strength:

• Outer vacuum-formed uPVC skins: 1.5 mm to 2.0 mm thick impact-resistant, UV-stabilised PVC-U outer skins pressed with classic moulded Victorian, Edwardian, or contemporary raised panel patterns that never rot, rust, or require painting.
• High-density core insulation: 20 mm to 24 mm thick closed-cell expanded polystyrene (EPS) or high-density polyurethane (PUR) foam core providing high thermal insulation (Ud values down to 1.3 to 1.5 W/m²K).
• Dual MDF/plywood security core reinforcement: High-security panels incorporate dual 4 mm moisture-resistant MDF or marine plywood reinforcement sheets bonded between the foam core and outer skins, preventing forced-entry kicking attacks and resisting warping under summer solar heat.

uPVC Door Panel Styles and Configurations

We supply and install a versatile selection of panel configurations:

Explore full door collections in our composite entrance doors and door systems hub.

Pet Flap and Cat Flap Integration in Solid Panels

Solid and half-glazed uPVC infill panels are the most straightforward and cost-effective location to install pet doors:

• Ease of installation: Unlike toughened double-glazed glass, reinforced uPVC sandwich panels can be neatly routed and cut on site using professional jigs, allowing rapid installation of microchip or manual cat flaps and dog doors.
• Reinforced backing: Our fitters install internal timber grounds around the pet flap cut-out to ensure a rock-solid, draught-free mechanical clamp that will not compress the foam core. Check our dedicated cat flap installation guide.

Replacing Damaged or Discoloured Door Panels

If your existing uPVC back door panel is discoloured, cracked, or punctured, replacing the panel without replacing the outer frame is clean and cost-effective:

• 30-minute panel swap: Our glazier removes the internal glazing beads, lifts out the damaged panel, cleans the rebate drainage slots, fits a custom-cut new reinforced panel with load-bearing bridge packers, and snaps the beads back securely.
• Zero disruption: Restores full weather tightness and security with zero damage to surrounding plasterwork. Explore our repair services and uPVC window systems.