Technical Information
Trimming Allowances
This varies from 2mm up to 16mm from all 4 edges depending on the supplier, and is restricted for several reasons, the two main reasons being:
- To retain an amount of lipping on the long edges of the door to allow the secure fitting of hinges and latches
- To not affect the construction of the door
It is important to adhere to the guidelines and to trim evenly, as excessive trimming will invalidate your guarantee. If you need to trim more than the recommended amount then this will be the customer's risk.
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Non fire doors = 2mm for white doors / 6mm for all other types FD30 doors = 2mm for white doors / 3mm for other types 3-5mm from Industiral style Metro and City doors |
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Non fire doors = 2mm for white doors / 6mm for all other types FD30 doors = 2mm for white doors / 3mm for other types |
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Non fire doors = 2mm for white doors / 6mm for all other types |
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Non fire doors = 16mm for all doors except flush * Flush Veneered = 3mm trimming all round (non fire and FD30) * Flush White Primed = 22mm trimming all round (15mm on FD30) |
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Non fire doors = 2mm for white doors / 6mm for all other types |
Door Construction
The doors come in several different cores as described below, but in all cases the doors will have a lipping of between 5-18mm on each long edge to allow trimming. All our doors are engineered so have a core of various degrees as described below and have face veneers of between 0.3-0.8mm as an industry standard.
Standard Core - a frame goes around the perimeter and a lock block will be present on 1 or both sides for fitting of the latch or lock and handles. If the lock block is only present on 1 side then the correct side will be indicated by a keyhole or key symbol at the top of the relevant side and will be 1/2 way down unless otherwise indicated. The centre of the door will be of a multi cell or spacer pad construction and can vary from different manufacturers. 35 or 40mm thick respectively as described in product description.
Semi Solid Core - as above but with a larger frame around the perimeter and added struts going horizontally to give extra strength and blank parts will be have multi cell or spacer pad construction and can vary from different manufacturers. 35 or 40mm thick respectively as described in product description.
Solid Core - this is the highest quality of all the constructions and offers more sound resistance than the standard or semi solid core. The inner core will be of laminated timber, particleboard or joinery quality fibreboard, with lipping to 2 or 4 edges. 35 or 40mm thick respectively as described in product description.
FD30 fire doors - joinery quality high density fibre or particle board and 30 minute fire rated MDF to any thinner panelled sections respectively. Tested to British Standards for fire resistance for a minimum of 30 minutes. 44mm thick.
FD60 fire doors - joinery quality high density fibre or particle board and 60 minute fire rated MDF to any thinner panelled sections respectively. Tested to British Standards for fire resistance for a minimum of 60 minutes. 54mm thick.
Bi Fold Doors
Differing from ‘ Folding Doors’ as in there are only 2 narrow doors as opposed to several wider ones. The opening sizes of Bi fold doors on our website refer to a height including the bi fold gear, so the door leaves themselves are a few mm lower than the 1981mm specified in the product description. The folding gear is included in the price.
Folding Doors
A number of doors from 2-6 folding within a specified opening size as in the product description. Complete with frame but NO architrave.
Nu Vu from LPD - supplied with a top track only and the sizes on the website include an amount of floor clearance (details in product specification). For use with 533mm, 610mm or 686mm doors only.
Roomfold from XL Joinery - supplied with a floor track and no allowance for floor covering. For use with 610mm doors only.
Folding Door System from Deanta - supplied with a top track only. For use with 610mm or 686mm doors only.
Room Dividers
Made up of 1 or 2 fixed side panels either side of 1 or 2 opening doors to the centre in fixed sizes. Complete with framing but no ironmongery. Sizes to be calculated are the responsibility of the customer with guidance form their carpenter with the help of the on line technical drawings available on request from
LPD - supplied without architrave.
XL Joinery - supplied without architrave.
Prefinished or Varnished
A ready finished door that is sprayed in the factory to save on labour and costs for on site finishing. Some doors may be supplied with the edges unfinished or the finish will be removed by the carpenter if the doors need to be trimmed to fit the openings. In either case the doors will need treating on the edges, and all cut outs for hinges, latches and locks also, to validate the guarantee.
If the product description does not mention pre-finished then the door will be supplied in an unfinished state ready for you or your tradesman to finish on site with one of our recommended treatments as described in our ‘Fitting and Treating Guide’.
Glass Types
Some doors come unglazed ready for the customers own choice of glazing which can be obtained locally or by the carpenter hanging the doors. It will be stated in the product description if the doors come unglazed or ready glazed. And where ready glazed, all glass will be safety glass and conform to BS6206 (A) or BS EN 12150 safety standards.
Clear Glass - plain flat glass with no pattern or obscurity
Frosted/obscure Glass - an acid etched or sandblasted effect to give a degree of privacy where light is still needed
Strata Glass - fine vertical obscure lines in an almost tree bark like pattern
Clear Bevelled - plain glass with no obscurity or pattern but a small bevel to the edge of each pane in the door (can be called a chamfer as sometimes seen on mirrors)
Frosted Bevelled - the edge of the glass has a bevel (as described above) but the centre is frosted (as described above)
Decorative - this can vary from leading with or without colours, to coloured, etched or cut patterns - please see individual product description for details
Pyro - this is the fire resistant glass that is inserted into all of our FD30 and FD60 fire doors and conforms to British Standards
Wired - only applicable to glass in fire doors as above but with a Georgian wired feature
Liner - essentially the frame that goes inside the opening which the door sits in, this may or may not be needed and you will need to check with your carpenter. Available in white primed, softwood, pre-finished walnut & pre-finished or unfinished oak.
Architrave - the decorative part of the door opening that sits on the face-off the wall and covers the gap or join between the wall and the frame. Available in pre-finished walnut & pre-finished or unfinished oak.
Skirting - the decorative boarding that sits on the floor and covers any gap or join between wall and floor, this is usually chosen in a matching design to the architrave style Available in white primed, pre-finished walnut & pre-finished or unfinished oak.