uPVC Windows Installation

A semi-detached house in Chesham required a full window replacement after the existing units had reached the end of their service life. The frames were draughty, several sealed units had failed, and the white exterior had become dull and discoloured against the property’s brickwork. The owners wanted a solution that would lift the outside of the house while keeping the interior bright and neutral. The goal was to install dual-colour uPVC windows—dark brown externally to complement the brick and roof tiles, and white internally to suit the décor and keep the rooms feeling light.

Our Solution

We supplied and installed dual-colour uPVC double-glazed windows across the front, side, and rear elevations. Dual-colour windows use a different foil finish on each face of the profile, allowing the exterior aesthetic and interior scheme to be addressed independently. The solution included:

• Dark brown wood-effect foil finish externally (RAL 8017) to complement the brickwork and roof tiles
• White finish internally to keep rooms bright and neutral against existing décor
• uPVC casement windows with side-hung openings and concealed friction hinges
• A-rated double glazing with argon gas fill and low-E coating for improved thermal insulation
• Multi-chambered uPVC profiles to reduce heat loss and prevent condensation
• Acoustic-enhanced glazing to front-facing rooms to reduce road noise
• Multi-point locking systems with anti-snap cylinders and security handles
• Trickle vents for compliant background ventilation
• Georgian bar inserts to the front elevation to retain the property’s established character
• Reinforced frames for added strength and security
• Matching dark brown sills and external trims, with white internal trims for a cohesive finish both inside and out

Installation Process

• Carried out a detailed pre-installation survey with laser measurements of every opening
• Confirmed dual-colour specification, glazing options, and bar detailing with the owners
• Protected internal floors and furnishings before work began
• Removed the existing windows carefully to preserve surrounding brickwork and internal plaster
• Disposed of all old frames and glass responsibly
• Inspected and prepared lintels, reveals, and sills
• Installed new dual-colour uPVC frames using galvanised fixings and expanding foam
• Fitted double-glazed sealed units into each frame
• Adjusted all hinges, handles, and locking mechanisms for smooth operation
• Fitted and tested multi-point locking systems on every window
• Applied colour-matched silicone seals externally and white silicone internally for airtight, watertight weatherproofing
• Cleaned all glass, frames, sills, and surrounding areas thoroughly
• Conducted a final walkthrough with the owners to confirm satisfaction