Upvc Installation

 Here’s a brief guide to installing Siesto windows and doors. Full installation guides are available for all our systems

Transport and handling
Doors and windows can be transported either glazed or unglazed. Patio doors and bay windows may be supplied in separate frames and fabricated on site. Make sure windows and doors are stacked vertically in transit. Surface scratches caused by movement can be prevented by wedging flexible packing material between surfaces.
On PVC-U windows and doors that are delivered fully fabricated, the protective film should be retained for as long as possible – i.e. until all building work is completed.

Positioning the window
Windows should be positioned to bridge the cavity and cover the damp-proof course, and should be set back as far as possible within the opening to minimise exposure to the elements.

Fixing materials
All metal fixings such as cleats, screws and bolts should be of materials and finishes that offer high-performance corrosion resistance. It is recommended that fabricators use the fixing cleats and screws supplied by Siesto, which comply with the necessary standard .
The choice of fixing cleats or plastic sheathed fixing bolts usually depends on whether or not the opening is already plastered. Fixing bolts are sometimes preferred to minimise redecoration in existing houses where windows are being replaced. Both methods are suitable for new installations.
If fixing cleats are chosen they should be attached to the outer frame, starting at 150mm from the corner and thereafter at a maximum of 600mm centres. The cleats should be screwed into the mainframe in the central reinforcing chamber.
If fixing screws/bolts are used then the fixed lights should be deglazed and holes routed through the mainframe at the same fixing distances as the cleats. Drill a hole 12mm wide through the inside face of the mainframe and then use a masonry drill of a smaller diameter suitable for plastic sleeved fixing screws. Drill through the remaining PVC-U wall and into the masonry up to approximately 50-75mm deep. Screw home, taking care not to over tighten. Cap the hole on the inside of the frame with a grommet. Fixing is only necessary on three sides of the window, i.e. to the top and sides. Fixing holes should never be drilled down through the bottom profile.

Cills should normally be fixed to the bottom edge of the mainframe prior to installation of the window. The fixing screws should penetrate upwards into the reinforcement section in the central chamber. The cill should be placed on to a bed of mortar or silicone sealant.

Frame installation
Having decided on the preferred method of fixing, position the window so that it is both level and plumb, and held in position with wedges until fixing into the masonry is completed. Packing can also be used around the fixing bolts to ease fitting. The new frame must be fitted at least 10mm in from the outside edge of the face of the brickwork.It is essential that the windows are installed true and square, check by measuring the window’s diagonals after installation to ensure that no twisting has taken place.

Completing the installation
Having manufactured and installed the window so that there is a 5mm gap (approx.) between mainframe and masonry, it may be necessary to insert a flexible foam strip to form a base for the silicone sealant. Ensure that all the window/wall joints are properly sealed off.
Finishing work may be necessary inside the window, i.e. re-plastering or a Siestol finishing trim. Internal Siesto window board is also recommended both for replacement and new-build installations.Frames both inside and out should be washed down to clean off any building material residue, using household detergents. The use of solvent-based cleaners is not recommended

Contact Siesto Windows for more information
To find out more about installing Siesto windows and doors, contact us today.