Castag has been manufacturing customised and standard steel door frames since 1997. We are strategically situated in the industrial zone of Montague Gardens, Milnerton in the Western Cape.

We have established a long history of providing the highest quality STEEL DOOR FRAMES with reliable delivery and excellent customer service.

We are BEE compliant. 

Our family run business ensures hands-on management, working together with our dynamic team to achieve excellence.

What We Do

Castag produces standard and customised steel door frames, steel window frames, transformer room doors, steel louvers and metal cladding for door leafs.    

Commitment to service is paramount at Castag.  We guarantee a delivery time on door frames of 5 days per 50 frames from date of purchase order.  Our after-sales service is available on request.


Our Products

Pre-galvanised steel in 1.2, 1.6, 1,9 and 2.4mm thickness.  All wall sizes are accommodated. 

Our Customers

Castag has been serving the market for over 20 years.  Our Customers include Big Ben, Buildia, Concord, Group 5,  Isipani Construction, Mastec, Stefstock, WBHO and many others.  We can supply fire doors and door frames to the wider African market.

Our frames are available in the Western Cape and other parts of South Africa and export orders are happily accommodated.

Our Team 


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