Established Since 1976
HDB & BCA Licensed Contractor
HDB Licensed No. HB-02-0677-D
Direct Factory Sale
51 Kaki Bukit Industrial Terrace S 416131
Email: hohoengineering1976@yahoo.com.sg
For enquires, please call or whatapps us
Tel:67479019 or 96319288
Closed for Company Retreat
12 to 14 June
Reopen on 15 June 2023 10 to 4pm
Ho Ho Doors

Window grille
For Singapore HDB Flat
For new HDB BTO flat in Singapore, there are two main window style and format seen in the left picture .
If your living room window is similar to the picture on the left, window grilles are typically installed in the middle portion only. Your window grille will be 3 feet height. This is because the bottom portion of the window is fixed and made of tempered glass or laminated glass. Hence window grille do not need to be installed for the bottom portion. The top hung (top most portion) opening is not wide enough hence your children will not fall out from the top hung portion.
If your living room is similar to the picture on the right, window grille are installed on the top portion only. Your window grille will be 4 feet height. This is because the bottom portion of the window is fixed and made of tempered glass or laminated glass. Hence window grille do not need to be installed for the bottom portion.
3 feet window grille height opening in the middle
4 feet window grille height opening at the top

Aluminium Window Grille Design For Singapore HDB Flat
On the left are 8 design of aluminium window grille. HH1 aluminium grille is the most popular as HH1 aluminum grille is easy to clean and has less bar so owners will not feel so caged up.
HH4 aluminium grille is another popular design as HH4 aluminium grille looks like a ladder and some Fengshui Master claimed that HH4 aluminium grille symbolise “步步高升” (climbing up to a higher level).

6 window grille height for the full window
3 Types of HDB Approved
Service Yard Window Grille




For service yard window, if no window is installed. The service yard window grille installed must be one the the approved design provided by HDB. The picture on the left shows 3 HDB approved service yard window grille.
HDB permit must be applied accordingly to HDB regulation. The HDB permit is free and included in the price. Home owners have to provide us with a copy of their floorplan and sign a copy of the HDB acknowledgement form. We will settle the HDB permit on their behalf. This is necessary to ensure that the window grille abide to HDB regulation.
Slim Grille (Strong & Slim)
Latest in the market
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Slim window grille offers more than 95% scenery view
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Slim window grille is made of strong & durable wrought iron and mild steel
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Slim window grille can be swing open to clean unlike fixed invisible grille
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Slim window grille is casement hence unlike aluminium sliding grille, there are no track to clean. In addition, the protrusion of slim window grille is only 1 inch unless aluminium sliding window grille of 2.5 to 3 inch.
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Slim window grille is a cheaper alternative as compared to casement invisible grille and the protrusion is less.
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Slim window grille is available in many colours to match window frame
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Slim window grille is rigid and strong hence unlike invisible grille the gap can be as wide as 5 inch and it is still safe for children. For invisible grille because it can be bend, the gap must be around 3 inch for children safety
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Slim window grille can be both horizontal and vertical
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For cat owners, slim grille can be made to 2 inch gap so that your lovely cat will be kept safe



HDB BTO Service Yard Window
For BTO service yard, 3 panel sliding window with 3 track is highly recommended so that the opening is 67% which make it easier to hang your clothes.
Casement window cannot be installed in the service yard as the casement window will hit the laundry system outside provided by HDB.
According to HDB regulation, the frame and the glass colour of the service yard window has to be the same as the living room window scheme.
HDB permit must be applied accordingly to HDB regulation. The HDB permit is free and included in the price. Home owners have to provide us with a copy of their floorplan and sign a copy of the HDB acknowledgement form. We will settle the HDB permit on their behalf. This is necessary to ensure that the window grille abide to HDB regulation.