Introduction

All Longden doors and doorsets are manufactured from carefully selected timbers. Timber being a natural product will vary in colour and grain, unique to the particular species selected.

Care must be taken not to cause physical damage during unloading, storage and installation.

Delivery and Storage

On delivery, all components should be checked against the order schedule and inspected to ensure that there is no damage to any part including the protective packaging.

The appropriate moisture content (which will be the same as when it was manufactured) must be maintained during storage, construction and installation. Deliveries should be scheduled so that doorsets are left unfixed on-site for the least possible period of time. Exposure to the above recommended moisture levels will cause irreversible damage to the door with regards to bow, twist and the integrity of joints being compromised.

Physical damage to doors and doorsets can best be avoided by careful handling and keeping protective packaging in place for as long as possible. Doorsets should not be stored or fitted in the building until the wet trades have completed their work and the building has dried out.

Doorsets should not be stored on their edge or end. Store them flat on a level surface with at least three level bearers to keep them at least 90mm above the floor - the bearers should be longer than the width of the doors. Doorsets which have projecting sills or have the hardware fitted must have spacers between them in the stack to avoid damage.

Protect doorsets from extreme heat, dryness, humidity and sudden changes of temperature. Avoid double handling by storing doorsets in the order that they will be required and take care not to drag them across each other when they are removed. If doors need to be separated from doorsets for any reason, identify the door with its frame so that the correct door is returned to the correct frame.

Care should be taken not to store naturally finished doors where they may be exposed to daylight and opaque packaging should be kept in place until the time of installation.

Installation

Doors should be fitted so that they are square, plumb and true. Care must be taken to ensure that the gap between the door and frame does not exceed 3mm. Fire rated doorsets should not be altered on-site as this will affect the fire resisting properties of the doorset.

To avoid compromising the integrity of the door construction, the mortice and tenon joint should not be cut into when recessing lock cases on-site.

The size of the lock case will determine the size of the middle rail e.g. an 80mm lock case will require a 216mm middle rail, whereas a 108mm lock case will require a 244mm middle rail.

Hinge cut-out positions will be in accordance with Longden recommended and certified positions.

Door Protection Longden can provide durable door protection sheets (shown opposite) to help protect your door or doorset against on-site damage. Our door protection sheets meet the Loss Prevention Certification Board (LPCB) quality standards, are chemical resistant and waterproof and can be supplied for one or both sides of the door. For more information regarding the Longden door protection sheets, please use our contact form or call Longden on 0114 270 6330.