- 1998 specification
Detailed specification for the insulation of properties affected by noise from the Airport
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This is the Specification used where premises are treated under the Airport's Noise Insulation Scheme. It is set out in the agreement under s.106 of the Town and Country Planning Act 1990 entered into between the Airport the London Borough of Newham on 21st July 1998
1. Elevations to be treated
Windows and external doors to habitable rooms in north east and west facing elevations are to be fitted with secondary glazing except that:
(i) south facing habitable rooms in Original Premises shall also be fitted with secondary glazing as provided in Clause 7.2.2(b) and
(ii) only south east and west facing elevations to the properties located north of the Airport within East Beckton as described in Phase 4 of the Part IV Premises shall be treated as set out in Section C of this Schedule and
(iii) only south east and west facing elevations of any additional properties that may be located north of the Airport where identified pursuant to Clause 7.5 shall be treated as set out in Section C of this Schedule
2. Rooms to be treated
Habitable rooms are living rooms bedrooms and kitchen/diners.
3. Acoustic standard
The installation shall produce an average sound reduction not less than 25db averaged over 100 to 3150 Hz in accordance with the procedure of British Standard 2750: Part 5.
4. Glazing specification
4.1 The secondary glazing installer shall initially carry out a survey of the windows to be treated and shall produce a schedule of existing defects to be agreed by LCA the Council and the occupiers of the properties. LCA and the Council shall agree which defects must be remedied to ensure that the noise insulation meets the required acoustic standard and/or so that it can be satisfactorily fixed, and shall also agree how the costs of any such remedial work shall be apportioned. This work will be carried out by others before the installation of secondary glazing units begins.
4.2 The type of secondary glazing units fitted shall relate to the form of t'ne primary windows. The design of secondary units shall be such as to facilitate cleaning of both surfaces of the primary windows from within the treated room. Secondary units shall be either a side-hung casement type, or horizontally or vertically sliding units. Quotations shall be accompanied by full details of the systems offered.
4.3 The secondary system shall generally comprise 4mm float glass within white polyester powder-coated aluminium frames. 6mm float glass and toughened glass shall be used where required by B.S. 6206 for safety reasons. Anodic oxidation shall comply with British Standard. 1615.
4.4 The minimum air gap between primary and secondary panes is to be 100mm, where this can be accommodated within existing reveals.
4.4.1 Where the reveal depth is insufficient to achieve an air gap of 100mm, secondary glazing shall be fitted flush with the inner face of existing walls subject to a minimum of 50mm being achieved.
4.4.2 Where a minimum air gap of 50mm cannot be achieved within existing reveals and with the secondary glazing fitted flush with the inner face of existing walls boxing out of the reveals will be necessary. In these cases the reveals shall be boxed out to achieve a minimum reveal depth of 67mm.
4.4.3 In all cases where a minimum gap of 100mm cannot be achieved the glass thickness shall be increased to 6mm
4.4.4 The top and side reveals between primary and secondary windows are to be lined with an approved sound absorbent material treated with a suitable fungicide
4.5 The secondary glazing system is to be mounted on a timber frame with white gloss painted finish. Any gaps between sub-frame and reveal shall be sealed with an approved resilient sealant
4.6 Where it is necessary to remove and refix existing curtain tracks, pelmets etc., this is to be undertaken by the secondary glazing installer.
External doors to habitable rooms will be fitted with weatherstrip seals (approved by the Council) to the thresholds, jambs and heads. Opening fanlights over doors shall be sealed and fixed in a closed position. Glazed doors and fanlights shall not be fitted with secondary glazing where the sealing measures meet the performance required in paragraph 3
6.1 Existing air bricks within habitable rooms shall be replaced by permanent sound attenuated vents
6.2 In addition to the replacement of existing air bricks by permanent sound-attenuated vents, either two permanent sound-attenuated vents or one combined mechanical and permanent sound-attenuated vent shall be provided to each eligible room. These vents shall be in accordance with the standards given 'm the Noise Insulation Regulations. Mechanical vents shall be wired to the domestic supply in compliance with current IEE Regulations. Suitable ducting shall be provided from room to outside air, complete with an external grill
7. Building and Gas Regulations
7.1 The secondary glazing installer shall be responsible for ensuring that the property meets the ventilation requirements of the current Building and Gas Regulations on completion of sound insulation works. All additional ventilation shall be sound attenuated as provided in paragraph 6.2.
7.2 Any requirements for additional ventilation in the future arising from amendments to the building, to its gas appliance or the Regulations, shall be the responsibility of the building owner.
Free hanging venetian blinds by Perma Blinds Limited, or similar approved by the Council, are to be supplied and fitted between primary and secondary windows on the East West and South facades to eligible rooms. Blinds are to be white, with Bowden tilt mechanism. In no case shall it be required that blinds be fitted where, following the agreement of the owners of the property it is decided that such installation would be impracticable.
An independent Consultative Committee established by London City Airport pursuant to Section 35 of the Civil Aviation Act 1982
Page last modified: 29th July 2009