UPVC Windows Pre-Survey Checks

Check the structure around the openings for any defects such as cracked mortar joints and that suitable lintels are in place. Report any defects to the customer in writing and agree on the method of proceeding.

NOTE. PVCU windows and doors are not designed to be load bearing

Check the openings for any service cables (e.g. TV Aerial cables or telephone lines), mark these on the survey and agree with customer on the method of handling.

Determine the exposure category of the site and ensure that the replacement windows and doors are suitable.

Ensure compliance with Building Regulations as these affect replacement products. Particular attention is drawn to the requirements of Approved Documents L (Conservation of Energy), M (Access) and N (safety). Also, the fitting of replacement windows and doors should not worsen the existing provision in respect of Approved Documents F (Ventilation) and B (Egress). Photographic evidence of existing windows and doors should be considered in respect of queries raised by FENSA inspectors etc.

Ensure there are no obstructions, either internally or externally, that will prevent the new windows or doors from functioning correctly (e.g. external rainwater pipes or internal taps).

Check that the design of product falls within the following recommended maximum size range:

Product	Maximum Width (mm)	Maximum Height (mm)
Top hung casement sash	1200	1200
Side hung casement sash	700	1400
Tilt & Turn sash	1500	1500
Single hinged door	1000	2100
Double opening door	2000	2100
Tilt & Slide Patio sash	1000	2200
French window sashes	700	1400

The majority of sizes stated above are based on actual performance tests (refer to section 4.4 for full details and guidelines on maximum sizes for multi-lights and exposure categories).

Reference to be made to the hardware supplier to confirm suitability of selected components for the sizes intended.

Please note: The information on this page is for guidance only, and Glass Tec Windows are not liable for any damages or claims.