Curtain wall system

Stick-System Curtain Wall

Loose profiles, assembled on site — economical for mid-rise and complex geometry.

120 / 150 / 180 mm depth
Loose-pack shipping
On-site tolerance adjustment

Full-height glazing on a low-rise office facade beside street trees

Overview

How the system is built

BLTC manufactures and exports this system to facade contractors, developers and importers in North America, the Gulf and Europe. The stick system is assembled on site: mullions are fixed to the slab edge or to steel brackets, transoms are cut in, and glazing follows bay by bay. Because the profiles ship loose and nested, freight volume is roughly a third of an equivalent unitized package — a real advantage on mid-rise buildings and on projects with unusual geometry.

It is also the more forgiving system when the structure is out of tolerance or when drawings are still moving during the build. Adjustments happen on site rather than in the factory, which suits projects with a competent local installer and a realistic weather window.

Specifications

Stick-System Curtain Wall data

Ranges we manufacture to. Project values are fixed by calculation and confirmed on the approved shop drawings.

Stick-System Curtain Wall — technical data
Material	AA6063-T5 extrusions, mill or PVDF finish; steel reinforcement where required
System depth	120 mm, 150 mm or 180 mm face-to-back
Surface finish	PVDF 70% KYNAR 500, 25–35 µm; anodized 15–25 µm; powder coat
Glazing	IGU 6+12A+6, laminated 6.38–13.52 mm, single glazed where specified
Maximum panel size	1,500 × 3,600 mm; larger bays subject to structural review
Fire rating	B-s1,d0 to EN 13501-1; fire-rated spandrel options
Air and water	EN 12152 Class AE; EN 12154 Class RE 1200
Wind load	Design to 4.0 kPa, tested to 6.0 kPa
Thermal performance	Ucw 1.4–2.4 W/m²K depending on glazing
Design life	25 years; 20-year coating warranty available

Indicative values for preliminary sizing. Site-assembled systems are sensitive to installer quality; we supply setting-out drawings and a site supervisor on request.

System details

Joints, movement and anchorage

The four details that decide whether the facade performs for twenty-five years. Project-specific drawings are issued for approval before production.

Mullion and transom connection

Mullions are continuous over two or three floors with expansion joints at the brackets; transoms are mortised and fixed with stainless steel cleats. The connection is designed so that a transom can be replaced without removing the mullion.

Wet-seal versus dry-glaze

Dry-glaze with EPDM gaskets is standard and needs no site sealant on the face. Wet-seal is available where the design calls for a flush silicone joint, but it moves the critical work into site labour and weather protection — we will say so if the detail does not need it.

Drainage path

Each bay drains through weep slots in the transom to the outside face, with a continuous air seal behind. Internal baffles keep the pressure equalised so wind-driven rain does not migrate past the first gasket.

Site support

Packages include setting-out drawings, a fixing sequence, torque values and a QA checklist. For first-time installers we can send a supervisor for the first two floors, or run a factory trial assembly with your crew.

Finishes

PVDF or anodized?

Both are factory-applied and both last decades. The choice is usually decided by colour range and by what the specification in your market recognises.

Comparison of PVDF and anodized finishes
Property	PVDF (70% KYNAR 500)	Anodized
Film build	25–35 µm, 2- or 3-coat system	15–25 µm, integral anodic layer
Colour range	Full RAL / NCS range, metallics, mica, wood-grain	Natural silver, champagne, bronze, black (limited)
Weathering	AAMA 2605 / EN 12206, 10-year Florida exposure	Excellent — the surface is not a coating
Colour stability	ΔE ≤ 5 after 10 years, standard colours	No coating to fade; colour is in the metal
Impact / abrasion	Good; touch-up possible on site	Very good; scratches are difficult to repair
Best suited to	Facades, panels, coastal and high-UV exposure	Interiors, entrance frames, exposed metallic look
Warranty	20–30 years, project-specific	10–15 years

Powder coating is available as a third option for interior and low-exposure applications. For coastal projects we default to a 3-coat PVDF build at 35 µm minimum.

Downloads

Documents for your submission

Open download centre

Files are released per project so that the correct profile family and revision reaches your consultant. Request the set and we will send it with the quotation.

PDFTest reportsAir, water and wind resistance to EN 12152 / EN 12154 / EN 12155 DWGCAD detailsMullion base, transom, expansion joint and corner details PDFInstallation manualSetting-out, fixing sequence and torque schedule

Where it is used

Typical applications

FAQ

Questions about this system

If your question is about a specific elevation, send it with the drawing — the answer is usually in the geometry.

When is a stick system the better commercial choice?

Below roughly ten to twelve storeys, on buildings with many different panel sizes, or where local labour is cheap and skilled. It also wins when the structure is unlikely to be built to tight tolerance, because the system can absorb site variance that a unitized package cannot.

Can stick and unitized systems be combined?

Yes, and it is common on mixed-use schemes: unitized for the tower, stick for the podium, canopy and retail frontage. We detail both from the same profile family so the visual result is identical at the joints.

How do you protect the aluminium in coastal projects?

For coastal and marine exposure we specify 3-coat PVDF at 35 µm minimum, stainless steel fixings, and isolated contacts between aluminium and steel. Anodized finishes are also available at 20–25 µm where the design calls for a metallic look.

Stick-System Curtain Wall

Send the elevation — we will price the package

Include the building height, the wind region and the glazing specification if you have it. We reply with a preliminary panel schedule, the applicable test reports and a quotation.

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