WHEN FITTING THE 'CILL' I BED IT ONTO MORTAR THEN USE FIXINGS TO SECURE IT IN PLACE. ONTO THE FRAME DO I SECURE THE FRAME TO THE 'CILL' USING SELF TAPPERS?? OR WILL THIS DAMAGE THE SEAL OF THE WINDOW FRAME??
ARE THERE ANY TIP/TRICKS FOR EASE OF FITTING?? ITS A BIG DOOR
W 2.3M X H 2.4
THANKS