Rainbow Concrete Industries
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To be a safe, efficient, profitable and environmentally conscientious concrete manufacturer committed to product quality, sustainability and customer satisfaction. This will be achieved through the development of long-term partnerships with our customers, suppliers and employees. Together we will benefit from our objectives of continuous improvement and innovation.

Nick Naneff purchases his first block machine, which allows him to produce rainbow coloured bricks. Rainbow Concrete is born. Rainbow Concrete becomes incorporated, and begins production of over 6,000 blocks per day. Rainbow Concrete undergoes plant modernization increasing its production to 12,000 blocks per day.
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All ten of our ready mix and shotcrete plants, as well as our mobile plants, are fully certified by the Ready Mix Concrete Association of Ontario (RMCAO). This certification, along with our in-house laboratory, ensures that all concrete consistently meets the highest standards set out by the RMCAO.
Rainbow Concrete Industries Ltd. has built communities and lasting relationships over the past 65 years. We all know that home renovations and improvements add value to your home, and now at Rainbow Concrete, you can get EVEN MORE value for your money! We're excited to announce that you can now get AIR MILES Reward Miles with any purchase.
Granite Prestressed Concrete Limited was founded in 1988, adding hollowcore prestressed slabs to Rainbow Concrete's extensive product line while becoming Northern Ontario's only hollowcore producer. The addition of Granite Prestressed allowed Rainbow to supply and install a range of products including hollowcore slabs, insulated concrete wall panels and commercial stairs.
To use the volume calculators, first select the appropriate calculator for your project by using one of the buttons, then select imperial or metric measurement units and input your data. Results will be automatically displayed. Waste is not included in the calculations. Our calculators will assist you in estimating the amount of concrete needed for your project but you'll need to account for waste on your own.
In its simplest form, concrete is a mixture of paste (cement & water) and aggregates (sand & stone). The paste coats the surface of the fine (sand) and coarse (stone) aggregates and binds them together into a rock-like mass known as concrete. In addition to paste and aggregates, concrete may also contain highly specialized chemical admixtures that enhance the specific properties of concrete.
Reviews (3)
Amber Reed
Amber Reed
Jul 04, 2020
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Sudbury location isn't very helpful, rude on the phone and they make you feel like you're putting them out while trying to place a concrete order. Call Fisher Wavy instead!
Justin Faulkner
Justin Faulkner
Jun 11, 2020
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We do work on site from time to time and the staff are always great.
Long lasting local business, so you know your getting good quality products.
Jojo Paquette
Jojo Paquette
Jul 16, 2016
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I don't usually like to put in a review but after this call i've made to Rainbow concrete i felt it necessary to rant! I always like to support Sudbury business before the large box stores but this one will certainly not be worthy of my time or hard earned dollar! I called for a price on a stone and it was very obvious that the sales lady at the other end was not enjoying her day or certainly not eager to serve a future customer! I always try to be very bubbly and appreciative of the service i am given to the person at the other end... but after todays conversation I will definitely be taking my