Olsen Doors & Windows are constantly pushing the boundaries of modern technology when it comes to timber and aluminium solutions. Most recently Olsen UK has redeveloped the already established Je-Trae entrance door system. The most recent version of these high security doors has a double perimeter seal system between the outer frame and the door leaf which gives an improved overall door U-value of 0.76W/m2K. The doors are constructed on a steel ladder frame with an insulated core and solid timber facades available in a range of different traditional and contemporary designs. Thanks to this steel construction method the doors come with a 15 year anti-twist and warp guarantee giving clients peace of mind that these doors are built to last. A range of these doors can be viewed at the Building Centre, London or at Olsen??s head quarters in North Nottinghamshire.