Shadbolt purpose-made internal doors, doorsets and lining panels for schools and other education buildings enable specifiers to meet official guidance and standards for acoustic performance, fire protection, durability and resistance to abuse.
- Acoustic (sound insulating) doors protect teaching spaces from outside noise.
- Acoustic (sound absorbing) wall and ceiling lining panels control reverberation times to improve speech intelligibility in teaching areas.
- Acoustic linings absorb sound and reduce noise in circulation spaces.
- Fire resisting doors provide 30 or 60 minutes protection in an exceptional range of size envelopes.
- Double doors and extra wide doors enhance accessibility.
- Doors meet the Severe duty classification, resistant to frequent use and abuse.
A comprehensive manual: Shadbolt Doors and Doorsets for Schools and Educational Establishments, is available on CD on request.
Acoustic design of schools now has a greater significance since it is controlled by Building Regulations. School buildings are subject to design checks and on-site inspections by building control officers.
Building Regulations (England and Wales) Approved Document E4 Acoustic conditions in schools requires each space in a school to have the acoustic conditions and noise insulation appropriate to its use. This can be satisfied by meeting the values for sound insulation, reverberation time and internal ambient noise given in Section 1 of Building Bulletin 93 Acoustic Design of Schools.
We recommend that a specialist consultant is employed for the acoustic design of all education buildings.
Doors and Doorsets
Shadbolt doors for education buildings will meet performance requirements for:
- Fire resistance FD30 and FD60 (or E30, E60).
- Smoke containment
- Sound insulation
- Severe duty
- Clean room / laboratory doors can also be supplied.
Fire performance and duty are accredited under the Exova BM TRADA Q Mark third party scheme. Generally, where required, fire and acoustic performance can be combined in one door.
Doorsets are available in a full range of configurations including door height or storey height, single or double leaf, single or double action and with or without overpanels and transoms. Bi-folding and sliding pocket doors are also available.
Glazed panels can be incorporated whilst maintaining fire and acoustic performance.
Various frame systems are available to meet performance requirements for education establishments. They are designed to provide flexibility of installation by simplifying co-ordination with site dimensions and tolerances whilst minimising wastage of materials.
Doors allow considerable freedom of aesthetic design and can be veneered or finished in a range of coloured finishes, see Finishes and Substrates.
With acoustic sealing, doors can provide sound insulation of:
44mm doors: 32dB Rw
54mm doors: 35dB Rw
These will suit most locations where a 30dB Rw performance is required by Building Bulletin 93. Higher performance (up to 44dB Rw) can be achieved if required.
The doorsets are robust and achieve the highest possible Severe duty classification. This enables them to be used in the most demanding applications where they are likely to be subjected to high frequency use with risk of accidental damage and possibility of violent abuse.
Security doors are also available. For more information see Durability and security.
Safety in use
If specified, Shadbolt doors and frames can be supplied with pencil rounds machined to vertical edges, giving a number of benefits:
- Less liable to show damage.
- Acts as a lead for edge seals resulting in less wear and improved durability.
- Minimises the risk of injury in the event of accidental impact.
As an additional safety option, doors can be hung on continuous hinges with finger guards, minimising the risk of fingers being trapped at the door edge.
Wall and Ceiling Linings
Sound absorbing linings
Shadbolt can supply sound absorbing lining panel systems for walls and ceilings. These systems can reduce reflected sound, control reverberation times and thus improve speech intelligibility. To be effective, panels must be correctly distributed on surfaces, and therefore specialist advice should be sought in designing such treatment.
Systems generally comprise chipboard or MDF panels with routed perforations, backed by an absorbent membrane such as mineral wool, and mounted on a suitable batten system. Skirting and cornice details can be provided as required.
Lining systems can be tuned by acoustic engineers to provide optimum reverberation times to suit the room size and function. This is achieved by adjusting the air gap between panel and wall, the thickness of absorbing membrane, and the perforation pattern.
Perforations can be in any pattern required subject to performance. Panels can be finished in an extensive range of veneers and coloured lacquers or paints, see Finishes and Substrates.
Regulations and guidance
In teaching and study spaces, sound is reflected from room surfaces (walls, ceilings etc). Hard surfaces reflect more sound, giving a longer reverberation time (the time taken for the sound to die away). If there is too much reflected sound, speech becomes difficult to understand. Building Bulletin 93 specifies reverberation times for various spaces such as classrooms and assembly halls.
There is also a requirement to provide sound absorption in corridors, entrance halls and stairwells to avoid interference with teaching and study in adjacent rooms. The amount of additional absorption should be calculated according to Approved Document E Section 7.