Remember due to the bonding process of door panels they will always work to a 1-2mm depth tolerance. In doors that are particularly old it should be noted that the glazing gaskets will of lost some compression purely due to been compressed over such a long time and variation in seasons. If this is the issue you may need to also consider replacing the glazing gaskets as an option. Alternatively a suitable all weather sealant may be additionally required. Removing the beads is best done with a purpose made glazing bead knife (Our part:2143 & you may find our how to do You Tube Video: Replacing A Double Glazed Unit (DGU) The panel is easily cut to size using a fine cut timber panel saw, Jig saw or if preferred circular saw. Clean the panel and door down using either warm soapy water or Upvc cream cleaner for more stubborn marks and scuffs.

Transfer the dimensions onto the panel to be cut & in the case of panels with a raised molding ensure these are centrally laid out to fit in the overall dimensions. N:B leave the protective film on the panel for marking out & cutting to prevent any marks or scratches.