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Interspec Doorsets offer a wide range of coloured and wood replica high-pressure laminate HPL facings from the Formica® Laminate Collection.
Laminate doors are favoured in many commercial applications as they are typically known for being exceptionally hard-wearing, heavy-duty doors.
Doors are faced with an HPL woodgrain effect and are hardwood lipped on four edges, or alternatively can be PVC edged.
Doors are faced with laminate from our plain colour ranges varying from bright, bold solid colours to subtle tones and are supplied hardwood lipped on four edges, or alternatively can be PVC edged.
For more details, please download our Doorset brochure (please note file size is 5mb)
Download the Formica® Laminate Collection Brochure here or visit our Brochures page.
At Lloyd Worrall we have identified the need for a full high performance doorset inclusive of ironmongery and access control resulting in the following benefits to the customer:
Interspec Doorsets are manufactured from a flaxboard central core with timber stiles and rails to all four edges. They are sub-faced and edged and then faced (veneer or laminate).
The timber stile and rail system ensures complete compatibility for a severe duty performance and provides a secure and solid fixing for critical items of ironmongery.
Interspec Doorset Performance | Fire | Smoke | Acoustic Level | Surface Performance | Mechanical Strength | Intumescent Seals | Smoke Seals |
Timber Doorset-Veneered | Yes | Yes | 30dBRw to 43dBRw | Medium Duty | Severe Duty | Yes | Yes |
Timber Doorset-Laminate | Yes | Yes | 30dBRw to 43dBRw | Heavy Duty | Severe Duty | Yes | Yes |
Timber Doorset-Fully Painted | Yes | Yes | 30dBRw to 43dBRw | Heavy Duty | Severe Duty | Yes | Yes |
Standards | BS476 pt22 | BS476 pt 31.1 | BSEN ISO 140-3 BSEN ISO 717/1 | BS3962 EN438 | BSDD171 | BS476 pt22 | BS476 pt 31.1 |
FD30, FD60, FD90 and FD120 certified fire doors.
Fire doors are also certified for smoke control (FD30S, FD60S, FD90S, FD120S).
A range of doorsets have been tested in accordance with DD171 and EN1192 resulting in a severe duty rating.
These specify the performance requirements for hinged and pivoted doors and classifies them by strength and durability based on four categories:
Light: Private dwellings.
Medium: Offices and dwelling with higher risk of damage.
Heavy: Hospitals and public buildings.
Severe: Educational establishments.
Acoustic rated doorsets require accurate sealing and installation to achieve the desired performance.
The number of vibrations per second expressed in Hertz:
The measurement of sound level in decibels (dB) with the sound reduction index (Rw).
The weighted sound reduction index is measured in accordance with:
The Rw ratings are for the doorset only. Manufacturers sometimes provide sound insulation data as a combined rating for the wall and doorset. The actual Rw rating of the doorset should be calculated using a percentage of the wall area it occupies. The wall rating is generally higher than the required doorset. Please refer to the table below.
Type of space used by students | Minimum Rw (dB) | Minimum Rw (dB) | Product |
Wall including any glazing | Doorset | ||
All spaces except music room | 40 | 30 | Rw 33 dB |
Music Rooms | 45 | 35 | Rw 38 dB |
Threshold seals are necessary in order to maintain the required acoustic performance level.
A drop-down seal or wiper seals with a rubber threshold will achieve the requirement at floor level. Any acoustic performance is fully dependant on the elimination of sound penetration, the area between the wall and the back of the door frame must be fully sealed.
Interspec Doorsets offers a range of aperture styles designed to suit many applications. Additional options are available upon request. Cut outs for classified products are subject to maximum allowances in fire/sound certification.
As standard, doors are delivered glazed.
= Equality Act compliant vision panels.
= Interspec Doorset bim object available.
Glazing bead is screw fixed as standard.
Glass thickness ranges from 6mm to 17mm dependant on performance.
The Interspec Doorset has an extensive range of configurations and styles. Regulatory compliance fit for purpose and safety are integral to the design whilst maintaining the desired aesthetic appearance and performance.
The table below outlines the standard configurations together with the basic dimensional principals of our doorset packages.
Structural Opening | Door Type | Frame Size | Rating | Door Thickness | Door Leaf Size | Clear Opening Width Fig A* | Clear Width Opening Fig B* |
900 x 2100mm | Single | 886 x 2089 | NFR/FD30 | 40 | 825 X 2054 | 765mm | 701mm |
1000 x 2100mm | Single | 986 x 2089 | NFR/FD30 | 40 | 925 X 2054 | 865mm | 801mm |
1100 x 2100mm | Single | 1086 x 2089 | NFR/FD30 | 40 | 1025 X 2054 | 965mm | 901mm |
900 x 2100mm | Single | 886 x 2089 | FD60 | 54 | 825 X 2054 | 751mm | 687mm |
1000 x 2100mm | Single | 986 x 2089 | FD60 | 54 | 925 X 2054 | 851mm | 787mm |
1100 x 2100mm | Single | 1086×2089 | FD60 | 54 | 1025X2054 | 951mm | 887mm |
1400 x 2100mm | Leaf & Half | 1386 x 2089 | NFR/FD30 | 40 | 925/396 X 2054 | 878mm | 814mm |
1500 x 2100mm | Leaf & Half | 1486 x 2089 | NFR/FD30 | 40 | 925/496/2054 | 878mm | 814mm |
1400 x 2100mm | Leaf & Half | 1386 x 2089 | FD60 | 54 | 925/396/2054 | 864mm | 800mm |
1500 x 2100mm | Leaf & Half | 1486×2089 | FD60 | 54 | 925/496/2054 | 864mm | 800mm |
1800x2100mm | Double | 1786 x 2089 | NFR/FD30 | 40 | 860/860X2054 | 814mm | 750mm |
1900 x 2100mm | Double | 1886×2089 | NFR/FD30 | 40 | 910/910X2054 | 864mm | 800mm |
1800 x 2100mm | Double | 1786 x 2089 | FD60 | 54 | 860/860X2054 | 800mm | 736mm |
1900 x 2100mm | Double | 1886×2089 | FD60 | 54 | 910/910X2054 | 850mm | 786mm |
*please note a standard handle projection of 64mm is used in these calculations. For unequal pairs, the clear opening is calculated on the basis that the secondary leaf is kept locked.
All prepared openings should be equal in wall thickness at all points and plumb and square tolerances of +10/-0 in the width and +5/-0 in the height.
All manufacturing processes require certain tolerances when working with natural materials that tend to move with climatic conditions. Lloyd Worrall work within the tolerances of BS4787 Pt.1 for internal and external wood doorsets, door leaves and frames.
Variation Tolerance (mm) | Tolerance (mm) |
in width & height of frame | +2.0 / -2.0 |
in width & height of door leaf | +1.5 / -1.5 |
in thickness of door leaf | +1.0 / -1.0 |
bow in the length of door leaf | 4.0 |
cup in width of door leaf | 2.0 |
twist across door leaf | 6.0 |
deviation in squareness per 500mm | 1.5 |
deviation in load surface flatness per 200mm | 0.5 |
We’ve created a toolbox talk installation video to show how to install our Interspec Doorsets.