Minimum Safety Requirements for Installation/Replacement of New Aluminium Windows
As part of HDB’s efforts to enhance the safety of windows installed in HDB flats, HDB has introduced the minimum safety requirements for installation/replacement of new aluminium windows.
Flat owners must engage only BCA approved window contractors registered with HDB to carry out installation/replacement of new aluminium windows in HDB flats.
For repair of existing aluminium windows, please refer to the safety requirements.
Aluminium Casement Windows
|Friction stay||Stainless steel grade 304 or equivalentMinimum thickness not less than 2.5 mmLength not less than 1/2 width of window leaf|
|Window leaf||Maximum width not exceeding 700 mm|
|Aluminium section for screw connection||Minimum thickness 2.75 mm|
|Connection of friction stay to window frame||Stainless steel grade 304 self-tapping screw of minimum size no. 8 (4 mm)If aluminium section is not less than 3mm thick, epoxy coated screws can be usedMinimum 4 screws on each side of friction stay|
(if used) for corners of window leaf
|Zinc casting corner brackets|
Aluminium Sliding Windows
|Safety devices||To install the following:a. Polyethylene sliding window self-locking safety device (2 nos. per panel)
b. Synthetic resin stoppers at top of window outer frame
c. Aluminium bottom outer frame with fixed angle facing outsideDimension “b” shall be minimum 1.5 times dimension “a” [refer to drawing]
|Sliding panel||Maximum width not exceeding 1.2 m|
Aluminium Adjustable/Fixed Louvre Vent
|Glass louvres||Minimum glass thickness not less than 6 mmWire-glass type|
|Glass louvres safety device||Aluminium U-channel cleat at every glass louvre|
|Types of Building Work||Need Permit?||Subject to the following Guidelines / Conditions|
|Placement of non-reflective film over the glass panel of existing windows/balcony doors||No||Not applicable.|
|Installation of bamboo chicks/venetian blinds/curtain rail internally||No|
|Replacement/installation of window on parapet||Yes||Width of window panel:
For flats handed over from 1 July 2007 onwards
|Installation of windows# on parapet at open balcony# For some precincts where the design of the balcony space adopted the URA’s balcony Gross Floor Area (GFA) incentive scheme in the residential development,windows including full height sliding doors are not allowed to be installed at the balcony. Examples of such precincts areDesign, Build and Sell Scheme (DBSS) flats.
[You may view the GFA incentive scheme at URA’s website.]
|Installation of grilles at service yard/balcony parapet (if any)||Yes||For flats handed over from 1 July 2007 onwards
|Installation/replacement of internal metal grilles of any design at window and balcony parapet||No||* Applicable to developments handed over before 1 July 2007
|Installation of internal metal grilles of any design at double-storey balcony of executive maisonette||No|
|Installation of metal grilles at double storey corridor end balcony of executive maisonette||No|
|Installation of metal grilles of any design at interaction balcony||No||
|Replacement/removal of mild steel/stainless steel railing on top of balcony parapet wall||No||
Enhanced Renovation Guidelines For Installation/Replacement Of Windows
From time to time, HDB has been introducing new and distinctive features in HDB flats to enhance the aesthetic appearance of the block and the overall town. Some of the common distinctive features introduced are full height windows (3/4 height windows), windows with coloured frame/glass panel and windows with different proportions.
In July 07, HDB has introduced some control measures to ensure that the aesthetic appearance of the block/precinct will not be marred.
The following enhanced window guidelines have been implemented:
(A) Full Height Windows (including 3/4 height and bay windows)
Replacement of full height windows is strictly not allowed, unless with valid reasons, such as badly damaged frame which require a total change of windows.
If replacement is necessary, flat owners need to engage a BCA-approved window contractor to submit an application for renovation permit to HDB electronically. The replacement must comply with the colour scheme, proportion and type [ie casement to casement, sliding to sliding] with that of the original windows provided by HDB, in addition to existing requirement to engage a Qualified Person (QP) to certify the lateral loading.
The QP is required to submit structural calculations and drawings to Building and Construction Authority (BCA) for regulatory approval via CORENET (COnstruction and Real Estate NETwork). Once the approval is given by BCA, the BCA-approved window contractor is to submit the BCA’s “Permit to Commence Structural Work” and approved drawings to HDB for the issuance of the renovation permit.
(B)Windows at Parapet/Balcony
(i) Flats handed over from 1 Jul 07 onwards
For installation/replacement of windows at balcony/parapet, flat owners need to comply with the colour scheme, proportion and type [ie casement to casement, sliding to sliding] with that of the original windows provided by HDB, in addition to existing requirements.
(ii) Flats handed over before 1 Jul 07
For installation/replacement of windows at balcony/parapet, an advisory note will be incorporated into the renovation permit to inform flat owners to comply with colour scheme and proportion with that of the original windows provided by HDB.
(C) Installation of Grilles at service yard/private balcony (if any)
Flat owners will need to install using HDB approved grilles design, which are given during the booking of flat/collection of keys via a renovation fact sheet for flats handed over from 1 Jul 07 onwards.
HDB InfoWEB: Guidelines for Window Works : Living in HDB flats : Home Renovation. 2013. HDB InfoWEB: Guidelines for Window Works : Living in HDB flats : Home Renovation. [ONLINE] Available at:http://www.hdb.gov.sg/fi10/fi10324p.nsf/w/HomeRenoGuidelinesWindow. [Accessed 25 September 2013].