Installing a new UPVC door and frame is a project that instantly elevates your home’s security, energy efficiency, and curb appeal. While the task requires precision, the process is straightforward when approached methodically. This guide provides a clear, step-by-step pathway for a successful installation, ensuring a durable and weather-tight finish that will serve your home for decades.
Preparation and Measurement
The foundation of a perfect fit begins long before the first screw is turned. Accurate measurement is non-negotiable, as UPVC frames are manufactured to strict tolerances. You must distinguish between a “replacement” install, where the old frame is removed, and a “new build” install, where the frame is set into a raw opening.
For a replacement, measure the height and width at three points—top, middle, and bottom. Use the smallest measurements to determine the order size, subtracting 10mm from both height and width for easy adjustments. For a new build, you will work directly from the architect’s drawings to ensure the brickwork opening aligns perfectly with the frame’s drip caps and drainage points.
Gathering Tools and Materials
Success hinges on having the right equipment on hand. Organizing your tools beforehand prevents mid-job trips to the hardware store and keeps the workflow smooth. You will need a combination of standard workshop tools and specific installation accessories.
Tape measure, spirit level, and chalk line.
Power drill with masonry and wood bits.
Adjustable spanners and screwdrivers.
Packers (plastic or wood) for leveling.
Silicone sealant and glazing putty.
Safety equipment including gloves and goggles.
Removing the Old Frame
If you are upgrading an existing installation, careful removal is essential to protect the surrounding structure. Old sealant and fixings must be removed without damaging the brickwork or window reveals. A gentle approach prevents cracks that could lead to future water ingress.
Start by scoring the old silicone sealant with a utility knife. Undo the screws or clips holding the frame and gently lever it outwards using a crowbar. Protect the brickwork by placing a piece of scrap wood between the lever and the brick. Once the frame is out, use a chisel to remove all old mortar and debris from the reveals, creating a clean substrate for the new frame.
Fitting the Frame
With the opening prepared, you can position the new UPVC frame. The key here is to achieve perfect level and plumb alignment before fixing the frame permanently. A misaligned frame will lead to sticking doors and windows that fail to seal.
Place the frame into the opening and use packers—thin wedges of plastic or wood—to adjust the position. Insert packers at the top and sides, checking the frame with a spirit level until it is perfectly vertical and horizontal. Ensure the frame is square by measuring diagonals; both measurements must be equal. Once aligned, secure the frame with fixing screws driven into the pre-drilled holes, spacing them approximately 600mm apart.
Sealing and Finishing
The final stages are critical for long-term performance. Even the most precisely fitted frame will leak if the seals are not applied correctly. This step creates the waterproof barrier that protects your interior from moisture damage.
Apply a continuous bead of high-quality silicone sealant to the gaps between the frame and the brickwork. Smooth the bead with a damp finger to ensure adhesion and a clean finish. If the frame includes glazing, apply glazing putty around the edges of the glass to create an airtight seal. allow all sealants to cure fully according to the manufacturer’s instructions before operating the hardware.
