Still one of the best ways to do windows.

Winblok® is a modular precast concrete and aluminium window system that provides an Architect great freedom in managing natural light and ventilation. Visually creating functional linkages between interior to exterior with textural effects, all within a load-bearing system.

Cost Effective

Analysis by independent Quantity Surveyors’ confirms that Winblok® is a sound choice, where product quality, cost, installation, and other factors are considered, and where optimum ratios for ventilation and lighting are applied in building design.

Simple Buildability

Winblok® is built into walls as part of the continuous brick or block work. No need for additional sills and plastered reveals. No lintels required under normal loading circumstances. Our Winvent® range is easily installed with SPM40SG sealant, requiring no skilled labour.

Interior Climate Control

The depth of Winblok® provides a means to manage and optimise direct and reflected sunlight. Winblok® has relatively low U and SHGC values which are available per application.

The full Winvent® range

Specifically designed and engineered to integrate perfectly with the Winblok® System.

winvents
winvent-Top Hung

Winvent® Top Hung

The aluminium Top Hung projecting out Winvent® is supplied factory glazed (silicone flush glazing), 4mm Float Glass as standard. Manufactured from aluminium extruded sections, which are epoxy powder coated finished. The handle is Injection Moulded, Glass Fiber Reinforced PA 6 Nylon in black. Weather seals are wool pile. The sliding friction stays are in 304 stainless steel.

All glass types may be specified for Winvent. Architect to specify appropriate glass type required per project. Fly screens and burglar bars may be factory fitted as additional accessories.

Please contact us to order or check stock availability within South Africa.

winvent-top-hung

Winvent® Dual Tophung

The aluminium Dual Tophung projecting out Winvent® is supplied factory glazed (silicone flush glazing), 4mm Float Glass as standard. Manufactured from aluminium extruded sections, which are epoxy powder coated finished. The handle is Injection Moulded, Glass Fiber Reinforced PA 6 Nylon in black. Weather seals are wool pile. The sliding friction stays are in 304 stainless steel.

All glass types may be specified for Winvent. Architect to specify appropriate glass type required per project. Fly screens and burglar bars may be factory fitted as additional accessories.

Please contact us to order or check stock availability within South Africa.

winvent-fixed

Winvent® Fixed Frame

The aluminium fixed frame Winvent® is designed to match the opening Winvent® Top Hung. Manufactured from superior quality aluminium extruded sections. It is supplied factory glazed (silicone flush glazing), 4mm Float Glass as standard.

All glass types may be specified for Winvent. Architect to specify appropriate glass type required per project. Burglar bars may be factory fitted as additional accessories.

Please contact us to order or check stock availability within South Africa.

directglazing

Winvent® Fixed Direct Glass

We have developed one of the most cost-effective ways to allow light into the building. A pane of glass (no aluminium) is directly installed into the glazing rebate of the Winblok® frame using our SPM40SG Hybrid Sealant.

As a standard we supply 4mm Toughened Safety Glass (TSG) for the Fixed Direct application, as we have found that the TSG types of glass are most resistant to cracking when applied directly into the Winblok® Concrete Frame. Cracking of glass in the Fixed Direct Application is caused by expansion and contraction of different materials, as the glass is not 'protected' by an aluminium housing. Float and Laminated Glass types do not perform well when used in the Fixed Direct application. The Architect is to specify the glass type required.

centralpivot

Winvent® Central Pivot

The aluminium central pivot Winvent®, designed for high level pole action with a pull ring spring catch, is supplied factory glazed (silicone flush glazing), as a standard we supply 4mm Toughened Safety Glass (TSG) for this application. It is manufactured from aluminium extruded sections which has an epoxy powder coated finish. Weather seals are wool pile and the centre pivot hinge is a nylon friction bearing.

Due to the nature of this window type, we recommend Toughened Safety Glass (TSG) for this application. Burglar bars may be factory fitted as additional accessories.

Please contact us to order or check stock availability within South Africa.

bottompivot

Winvent® Bottom Pivot

The Bottom Pivot Winvent® inward opening is designed to be used where projecting out, or a Central-Pivot Winvent®, may be inappropriate. This Winvent® is supplied with a pull ring spring catch and comes factory glazed (silicone flush glazing), as a standard we supply 4mm Toughened Safety Glass (TSG) for this application. It is manufactured from aluminium extruded sections which are epoxy powder coat finished. Weather seals are wool pile. The Bottom Pivot is set 100mm from the bottom and has a ‘stop’ attached to limit the opening width.
Due to the nature of this window type, we recommend Toughened Safety Glass (TSG) for this application. Burglar bars may be factory fitted as additional accessories.

Please contact us to order or check stock availability within South Africa.

flyscreen

Winvent® Flyscreen*

The Flyscreen for the Winvent® is manufactured from an aluminium extrusion frame into which a fibre mesh is secured with a rubber gasket. It is top hung on the frame with glass-reinforced nylon hinges and opens inwards secured by a catch.

*The Flyscreen is only available as a factory fitted item.

Please contact us to order or check stock availability within South Africa.

glazedlouvre

Winvent® Glazed Louvre

The Winvent® Glazed Louvre provides an opening window where projecting out, Central-pivot or Bottom-pivot Winvent® are impractical. An aluminium louvre blade mechanism is mounted in an aluminium Winvent® frame. The blade mechanism and frame are epoxy powder coated. As a standard we supply 5mm Float Glass for this application. Glazed Louvres may be used for ventilation in conjunction with Winblok® Winguard or special burglar bars in high security applications.

Please contact us to order or check stock availability within South Africa.

fixedlouvre

Winvent® Fixed Louvre

The Winvent® aluminium fixed louvre provides permanent fixed ventilation for squash courts, switch rooms, ventilation ducting and other similar applications. They will not totally exclude entry of wind driven rain. Aluminium Fixed Louvres are manufactured from extruded aluminum louvre blades carried on tubular mullions and mounted in an aluminium Winvent® frame.

Fly screens and burglar bars may be factory fitted as additional accessories.

Please contact us to order or check stock availability within South Africa.

burglarbars

Winvent® Burglar Bars

Winvent® Burglar Bars are manufactured from 12 x 10mm solid aluminium bars, and factory fitted with countersunk pop rivets as an added accessory.

Please contact us to order or check stock availability within South Africa.

Winvent®
Standard
Colours

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Silver(Natural)

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Charcoal

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White

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Black

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Bronze

Winvent® is SANS-10400XA & SANS 613 Compliant

Our Winvent® Top-Hung and Fixed-Frame windows are compliant with both SANS 10400-XA (energy performance) and SANS 613 (air and water filtration/penetration).

We are able to provide the Simulated Energy Performance Rating Certification for all design permutations using the Winvent® Inserts in the Winslot® System on request – confirming compliance with SANS 10400-XA simulation and calculations according to National Fenestration Rating Council(NFRC) and ISO standards.

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winblok precast concrete window system winblok precast concrete window system winblok precast concrete window system winblok precast concrete window system winblok precast concrete window system winblok precast concrete window system winblok precast concrete window system winblok precast concrete window system

Download Catalogue + CAD files + Autodesk® Revit® Families for this system.

All neatly packaged in a handy "zip" folder that contains everything you need.

Download CAD Files How To Install Winblok® Best Sellers Price List

Winblok® is a complete system.

Winblok® is always supplied as a complete architectural system, including the precast concrete windows surrounds and the Winvent® glazing inserts in the options available as one complete system.

This system has been painstakingly designed, tested and approved and is a comprehensive Total Window Solution. Therefore specifying or pricing this system should always include the Winblok® surround plus the Winvent® insert. This is to ensure that the system will function correctly for many years and perform exactly as it has been specifed by the architect, which in turn guarantees that the client is getting only the very best Winblok® solution for their project.

The full Winblok® range

Manufactured from high density, low permeability concrete.

The Winblok® System is reversable to have the glazing rebate on the inside or outside of the building.
(Images below are viewed as if outside of the building.)

Please contact us in order to check the stock availability of certain sizes and products within South Africa.

Square Winblok®

(Winvent® Top Hung)

800x800, 600x600, 675x675, 400x400

Rectangular Winblok®

(Winvent® Central Pivot)

800x600, 800x400, 690x460, 600x400

winblok
DISCONTINUED
(DEC 2020)

Corner Winblok®

*Discontinued*

800x800, 600x600, 675x675, 800x600

Triangular Winblok®

(Winvent® Fixed Frame)

800x800, 675x675, 600x600

Quadrant Winblok®

(Winvent® Fixed Frame)

800x800, 675x675, 600x600

Circular Winblok®

(Winvent® Fixed Frame)

800 or 600mm Outside Dia.

Winpanel Winblok® Panel

Solid in-fill panels made from 40mm thick unreinforced 30MPa concrete. They are fixed into the Winblok® System on site using non-ascetic silicone.

Winguard Winblok® Insert

Reinforced security elements made from 30MPa concrete reinforced with Y12 bars. Fixed into Winblok® System on site using epoxy adhesive or non-ascetic silicone sealant.

Wingrid Winblok® Insert

Rebated, pierced panels made from 30MPa concrete reinforced with galvanised wire. Fixed into Winblok® System using non-ascetic silicone sealant. They can be glazed or left open.

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Instructional Winblok® Videos

Don't hesitate to contact us regarding any questions

Contact Us

Winvent® = 50% More Light!

Winvent® is designed as an integral part of the Winblok® and Winslot® systems that we are able to back by technical support service including National Building regulations and thermal performance certificates.

The relatively small aperture size in a Winblok® required that width in elevation of the Winvent® frame be reduced to a minimum. This was achieved by designing a section that borrowed its structural strength from the adjacent concrete (in the case of the frame) section and the adjacent glazing (in the case of the sash) by introducing, back in 1985, the new concept of structural silicone bonding for glazing and concrete.

This technology allowed the Winvent® System to be bonded directly into the Winblok® System without mechanical fixing and resulted in a width of only 35mm as against 65mm of conventional aluminium glazing systems.

50percentmorelight

Comparative Advantages

Winblok® Standard*
Aluminium
Timber Winslot®
Allows for the control of direct sunlight
Provides bounced light into the interior
Glazing after wet-work to eliminate damage and theft during construction
Provides an integrated lintel
Provides an integrated sill
Low maintenance
Supplied as finished product
Reduces need for high performance glass to control solar heat gain
Reduces need for structural glass due to reduced height of vertical apertures
Reduces the need for deeper structural aluminium sections
Glazing requires no mechanical fixing, silicone installed
Provides a rebate to receive a Venetian / Roller blind
Supplied with thermal barrier
Provides an integrated drip line which enhances waterproofing

*Compared to standard aluminium casement windows

Winblok® = Winblock

Winblok® is a registered trademark. Back in 1983 our founder, Al Stratford, gave this innovative and unique window system an appropriately unique name. However, sometimes the Winblok® system is incorrectly spelled Winblock (with 'ck' at the end, instead of just the 'k') by mistake.

So just in case, we thought we better clear that up. There's only one original award-winning Winblok® System around, so we're pretty sure the folks typing 'Winblock' into a Google search are, for the most part, looking for Winblok® The Total Window System.

Winblok® is available throughout South Africa including Cape Town, Durban, Johannesburg, Port Elizabeth and East London.
Contact us for pricing on 0861 555 180 or send us a message.