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Installing Double Glazed Windows in New Homes

When installing double glazed windows in a new home, one efficient method involves using brackets. Standard aluminium brackets, measuring 120mm x 40mm x 5mm, are used to secure the window to the brick. These brackets are attached to the window before it is fitted into the aperture.

Tools Required:

  • Gloves, Goggles

  • Tape Measure, Spirit Level, Pencil

  • Electric Screwdriver, Nail Gun (if required)

  • Hand Drill, with 3, 3.5, or 4mm drill bits

  • Screws (see below for sizes)

  • Saw (to cut aluminium angle)

  • Expanding foam

  • Window Packers - 1, 3, 7, 12mm

Before attaching the brackets, ensure the size, style, and position match the order. Generally, the double glazed window should be at least 10mm smaller than the opening on each side; otherwise, professional installation is recommended. Brackets are attached with 30mm screws in no particular order, maintaining the window level. Place brackets 100mm from the bottom and top of the double glazed window, with remaining brackets spaced 350-400mm apart. The number of brackets used depends on the window size.

Fitting New Double Glazed Windows:

Screw sizes differ at this stage; use 60mm screws to attach the bracket to the brick. Insert the double glazed window with brackets into the aperture in two stages. First, level the window horizontally and use packers to reach the desired level. Second, use vertical packers to prevent tilting, ensuring the window remains supported. Fit packers under the side brackets, lightly tighten screws initially, and finalize after all points are started. Over-tightening may cause the window to curve. Adjust screws and packers if the window leans. Proper leveling prevents sash misalignment. Double check everything before proceeding.

Sealing New Double Glazed Windows and Doors for Insulation:

To maximize the performance of our energy efficient double glazed windows, apply expandable foam around the window to seal gaps. Sealing cavities, cracks, and spaces between the window and wall reduces noise transmission and ensures weatherproofing. If the exterior render is complete, silicon may not be necessary. If the brick is exposed, use silicon to seal and protect expandable foam from radiation damage. Inside, cover brackets with gyprock, reveal, or architraves as specified. We offer consultations for solutions at any stage.

Glazing of New Double Glazed Windows and Doors:

Handle double glazed units carefully, as they are heavy and pose a higher injury risk. Additional tools needed include:

  • Glass suction cups/vacuum cups

  • Rubber or plastic hammer

  • Glass/Glazing packers

  • Silicon or plastic glue

Apply glass/glazing packers (5-7mm) on the bottom section of the frame/sash. This raises the insulated glass unit, centering it within the window. Misaligned double glazed units compromise the design. Centre the glass by ensuring equal gaps at the top and bottom. Side packers prevent movement. Measure 1/3 of the glass height, attach glass packers with glue or silicon, and use suction cups to position the glass. Tap glazing beads or strips with a hammer to secure the glass.

Final Step of Installation for Double Glazed Windows and Doors:

For operable panels, fit handles and hinge covers. Test the double glazed window or door by opening and closing it. It should operate smoothly without force and be airtight when closed. Ensure the sash fits properly, with no gaps between frame and wall. If misaligned, adjust accordingly. Open the sash several times to confirm smooth operation. Adjust as needed for user comfort.