| Model | Brands | Gauge | Glass | From ৳/sft |
|---|---|---|---|---|
| General model — 4-inch two-track sliding with mosquito-net track | KAI · Altech · Alfa · Max · Panda | 1.1 · 1.2 · 1.5 mm | 5 mm clear, tinted or reflective | 650 |
| Euro model — slim sightline, EPDM gaskets, single glazed | EDF | 1.2 · 1.5 mm | 5–6 mm | 1,055 |
| Euro model — double glazed (sound and heat) | EDF | 1.2 · 1.5 mm | 6 + 12 air + 6 mm | 1,290 |
| Folding mosquito net — on an existing window | — | — | — | 480 |
Rates include supply, fabrication, transport within Dhaka and installation; VAT excluded; starting rates valid from 16 August 2026. Every rate is a "from" — the final price is fixed in the written quotation after site measurement.
What moves the price
1.5 mm sections are heavier and cost more than 1.1 mm; upper floors and large sashes are specified at 1.2–1.5 mm.
KAI, Altech, Alfa, Max and Panda are all Thai-system profiles; they differ in list price and finish quality. The quotation shows the brands side by side.
5 mm clear is standard; tinted or reflective adds a little; 6 mm, tempered or double glazing changes the rate.
Bronze, black, golden, PC white and Woodtech cost more than standard silver.
Small windows cost more per square foot — the lock, rollers and handle are the same — so bathroom and kitchen openings are listed separately.
Upper floors, no lift or scaffold, removal of old frames — each appears as its own line in the quotation.
One calculation: a 5 ft × 4 ft window
Opening 1524 × 1219 mm (height × width). Billing uses the standard cutting size, each side rounded up to the next half-foot — here exactly 5 × 4 = 20.00 sft.
| General model | 20.00 × ৳650 | ৳13,000 |
| Euro model | 20.00 × ৳1,055 | ৳21,100 |
| Euro, double glazed | 20.00 × ৳1,290 | ৳25,800 |
VAT excluded, within Dhaka. The quotation prints the measured area (19.99 sft) beside the billed area. The cutting list for this window (O/T 1206, S/T 528, glass 55-7 × 21-5 in) can be run in our calculator.
Technical data — General model 4-inch sliding
| Item | Value |
|---|---|
| Outer frame depth | 91 mm (4-inch); 76 mm (3-inch); 72 mm light section |
| Thickness lines | Standard · 1.2 mm · 1.5 mm (KAI-Altech list) |
| Leaves | Two sliding leaves plus a mosquito-net sash on an integral track |
| Profiles per window | 8 profile types · 16 pieces · 6 distinct cut lengths |
| Glass | 5 mm clear, tinted or reflective (6 mm on request); cut height = opening height − 106 mm; width per leaf = (opening width − 117 mm) ÷ 2 |
| Bar lengths | 21 ft and 18.5 ft |
| Finishes | Silver · bronze · black · golden · PC white · Woodtech |
| Hardware in the rate | 4 adjustable rollers · 1 crescent lock · wool-pile seals · net rollers and angles · silicone |
Frame depths and thickness lines from the current KAI-Altech list; the cutting rule is our workshop's for this system and is what the calculator applies. Maximum leaf size depends on floor and wind exposure and is stated on the quotation.
How measurement and billing work
- Every opening is measured on site — height first, then width, in millimetres; width at the top and the bottom, the larger governs.
- Page one of the quotation is the measurement sheet, with the drawing and a per-window cutting list for approval before fabrication.
- The final bill follows site measurement, with a Mushak-6.3 VAT challan. 50 to 60% advance, balance on installation.
- 10 to 15 days for ordinary jobs; add 7 to 10 where glass is tempered or double glazed. One-year warranty on installation.
Questions we are asked
Is 'Thai glass' the same as a Thai aluminium window?
Is "Thai glass" the same as Thai aluminium?
KAI, Altech, Alfa or Max — which one?
5 mm or 6 mm glass?
Is the mosquito net included?
How long does the job take?
Is site measurement charged?
Send the window sizes, get an indicative figure
Height × width in millimetres and how many windows — a hand-written reply the same day, Saturday to Thursday, 9 am to 7 pm.
Updated 19 September 2026 · rates valid from 16 August 2026