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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
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.
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
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.
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.