DO NOT USE THESE COWBOYS. THEY REPRESENTED PENICUIK AND ST ANDREWS GLASS AND I WOULD/WILL DISCOURAGE ANYONE USING EITHER OF THESE COMPANIES AS A RESULT OF THE SUBSTANDARD WORK "JOB WORTH DOING" ACTUALLY DID. SOME OF THE FAULTS...... WINDOW OPENING THE WRONG WAY.....TWICE. HANDLES TOTALLY DIFFERENT. WINDOW SEALS ALL CURLED ROUND SO THEREFORE NOT SEALING. WINDOW SILLS NOT FLAT IN THE SLIGHTEST AS IN YOU COULD ACTUALLY SEE THEM NOT FLAT FROM 20FT AWAY. 4" EMPRY GAP BETWEEN INTERNAL WINDOW FRAME AND ACTUAL BRICKWORK WITH A BIT OF PLASTIC SURROUND COVERING IT. SUPPOSEDLY THE WINDOWS ARE POLICE APPROVED BUT FROM OUTSIDE YOU CAN SEE ALL OF THE MECHANISM SO HOW THEY CAN BE SAFE I DONT KNOW. ABSOLUTELY ZERO SOUND INSULATION. GENUINELY STAY AWAY FROM THESE MORONS!!!