Double Glazed Glass — Insulated Glass for Energy-Efficient Buildings

What is Double Glazed Glass?

Double glazed glass — also called an Insulated Glass Unit or IGU — is two glass panes sealed together with an air or argon gas cavity between them. The gas cavity acts as a thermal and acoustic barrier, slowing heat movement in both directions. In Pakistan’s climate this means less heat entering the building in summer and less warmth escaping in winter reducing air conditioning costs year round without compromising natural light or visibility.

Double Glazed Glass Price in Pakistan 2025

FGI Groups supplies double glazed glass at an indicative price range of PKR 700 to 1,200 per square foot. The final price depends on glass thickness, cavity width, gas fill type, glass specification such as clear, tinted, Low-E or tempered, and the total panel size ordered. Larger order quantities attract better per-unit pricing. These are tentative market rates that fluctuate based on raw material and import costs — please confirm all pricing with FGI Groups before placing your order. Call 0321-8453729 for a confirmed factory-direct quote based on your exact project requirements.

Double Glazed Glass Technical Specifications

Thermal Performance — U-Value

The U-value of a glass unit measures how much heat passes through it — the lower the number the better the insulation. Standard single-pane glass has a U-value of around 5.7 W/m²K meaning heat moves through it rapidly in both directions. A double glazed unit with a 12mm argon-filled cavity reduces this to approximately 2.8 W/m²K — cutting heat transfer by over 50% compared to single pane glass. For commercial buildings in Lahore and Karachi with large glass facades this directly translates into significantly lower air conditioning running costs every single month throughout the year.

Acoustic Performance — Noise Reduction

The sealed gas cavity inside a double glazed glass unit works as an acoustic damper — it absorbs sound vibrations that pass straight through single pane glass without any resistance. Standard double glazed units achieve STC ratings between 28 and 33 which represents a measurable and noticeable reduction in traffic noise, generator sound, and general urban noise levels. For offices, hotels, hospitals, schools, and residential apartments in busy areas of Lahore, Karachi, and Islamabad, double glazed glass delivers a quieter indoor environment that single pane glazing cannot provide regardless of its thickness.

Solar Heat Gain — G-Value

The G-value of a double glazed unit measures how much solar radiation passes through the glass into the building. In Pakistan’s hot climate a lower G-value is desirable for most commercial and residential applications — it reduces the amount of solar heat entering the building through the glass, lowering the cooling load on air conditioning systems during the long summer months. FGI Groups can specify double glazed units with tinted or Low-E coated glass to achieve lower G-values for south and west-facing facades that receive maximum sun exposure.

Available Thickness and Cavity Options

FGI Groups manufactures double glazed glass units in a wide range of standard and custom configurations to suit every project requirement. Glass thickness options include 4mm, 5mm, 6mm, 8mm, 10mm, and 12mm on each pane. Cavity widths are available in 6mm, 9mm, 12mm, and 16mm depending on the thermal and acoustic performance required. Gas fill options include dehydrated air for standard applications and argon for enhanced thermal performance. The maximum panel size we supply is 2438mm by 3657mm making our units suitable for large curtain wall and facade applications across Pakistan. Glass options include clear, tinted, reflective, Low-E coated, tempered, and laminated depending on the project specification.

FGI Groups double glazed units are manufactured in compliance
with ASTM E 2190 — the international standard for insulating
glass unit performance.

Double Glazed Glass Uses in Pakistan

Double Glazed Window Glass

Double glazed window glass has become the modern standard for energy-efficient residential and commercial buildings across Pakistan. Replacing existing single-pane windows with double glazed units reduces solar heat gain during summer, retains warmth during winter, and cuts external noise levels — improving occupant comfort and reducing energy bills at the same time. FGI Groups supplies double glazed window glass compatible with aluminium, UPVC, and timber window frames in custom sizes to suit any window opening across Pakistan including Lahore, Karachi, Islamabad, Faisalabad, and Rawalpindi. FGI Groups supplies double glazed windows Pakistan-wide —
Lahore, Karachi, Islamabad, Faisalabad, and all major cities.

Double Glazed Glass Door

Commercial buildings, hotels, and high-end residential properties across Pakistan increasingly specify double glazed glass doors at their entrances and internal partitions. A single pane glass door creates a significant thermal weak point in any air conditioned space — heat enters in summer and cold air escapes in winter through the uninsulated glass surface. Double glazed glass doors eliminate this problem completely, maintaining the building’s thermal envelope while keeping the open, modern glass aesthetic that architects and interior designers specify for contemporary commercial spaces in Pakistan.

Curtain Walls and Commercial Facades

Double glazed glass is the standard specification for curtain wall systems and commercial building facades across Pakistan. Large glass-facade commercial buildings in Lahore, Karachi, and Islamabad that use single-pane curtain wall glass face enormous air conditioning costs because the entire building envelope transmits heat directly into the interior. Switching to double glazed insulated glass units in curtain wall systems reduces the thermal load on the building’s cooling system significantly — lowering operating costs for commercial developers and building owners over the entire lifetime of the structure.

Skylights and Glass Roofs

Skylights and glass roofs represent the most thermally challenging glazing application in Pakistani construction because they receive direct overhead sun exposure throughout the day. Single pane skylight glass creates intense heat gain that overwhelms air conditioning systems and makes the space below uncomfortable during summer months. Double glazed skylights — particularly units incorporating Low-E coated glass on the outer pane — reduce solar heat gain dramatically while maintaining full natural daylight transmission into the space below, making them the standard specification for modern commercial atria, shopping centre roofs, office skylights, and residential glass roof extensions across Pakistan.

Why Double Glazed Glass Beats Single Pane

Single pane glass offers no meaningful thermal or acoustic barrier — heat and noise pass through freely. Double glazed glass reduces heat transfer by over 50%, achieves STC noise ratings of 28 to 33, prevents winter condensation on interior surfaces, and meets modern green building specifications that single pane cannot satisfy. For commercial developers and property investors across Pakistan the performance difference is significant on every metric that matters.

Frequently Asked Questions

What is double glazed glass?

Double glazed glass is an insulated glass unit consisting of two glass panes separated by a sealed cavity filled with dehydrated air or argon gas. The cavity creates a thermal and acoustic barrier that significantly reduces heat transfer and noise transmission compared to single pane glass. It is the standard specification for energy-efficient windows, doors, curtain walls, and facades in modern construction across Pakistan.

What is the double glazed glass price in Pakistan?

Double glazed glass price in Pakistan ranges from PKR 700 to 1,200 per square foot depending on glass thickness, cavity width, gas fill type, and glass specification. Prices are indicative and subject to market fluctuation. Contact FGI Groups at 0321-8453729 for a confirmed factory-direct quote based on your exact project specifications before placing your order.

What is the difference between double glazed and single pane glass?

Single pane glass has no thermal or acoustic insulation — heat and noise pass through it freely in both directions. Double glazed glass traps a layer of still gas between two panes creating a barrier that reduces heat transfer by over 50% and cuts noise by 28 to 33 STC points compared to single pane. For Pakistan’s hot climate and noisy urban environments double glazed glass delivers measurable improvements in comfort and energy costs that single pane glass simply cannot provide.

Can double glazed glass be used in curtain walls?

Yes. Double glazed glass is the standard specification for curtain wall systems in commercial buildings across Pakistan. FGI Groups supplies custom insulated glass units for curtain wall applications in sizes up to 2438mm by 3657mm with options for tempered, laminated, tinted, reflective, and Low-E coated glass depending on the facade specification and performance requirements of the project.

What is double glazed window glass?

Double glazed window glass refers to insulated glass units used inside window frames — whether aluminium, UPVC, or timber. Each unit consists of two glass panes with a sealed gas cavity between them providing thermal and acoustic insulation that single pane window glass cannot match. FGI Groups supplies double glazed window glass across Pakistan for residential and commercial projects in all standard and custom sizes.

Does double glazed glass reduce noise?

Yes. The sealed gas cavity in double glazed glass absorbs sound vibrations providing STC ratings of 28 to 33 for standard units. This significantly reduces traffic noise, generator noise, and urban sound levels — making double glazed glass the preferred specification for offices, hotels, hospitals, and apartments near busy roads in Lahore, Karachi, Islamabad, and other major cities across Pakistan.

DOUBLE GLAZED GLASS