Leave the M56 at Junction 16, taking the 1st exit on the motorway terminal roundabout picking up the A5117 to Queensferry.
At the junction with the A540, continue straight ahead at the roundabout and continue to traffic signals at the next junction (A550) keeping left through the lights. You will pass RAF Sealand (Dara) on the left hand side, continue to the 2nd slip road on the left signposted Queensferry (NB Asda on the right hand side).
Take the 1st exit off the slip road for Chester Road following sign-posts for Sandycroft and Pentre.
At the 2nd set of traffic lights, turn left into Chemistry Lane.
Knauf Insulation is on the right, before the bridge.