The Top 3 ASPECTS
you should keep in mind when selecting a block colour:
Slight Colour Variation in every production run
The colour of a given concrete block is like a “visual summary” of all of the block’s mix design ingredients and is further influenced by the face texture, moisture content, exposure to dust and dirt, as well as how the block has been cured during the manufacturing process, thus, as with all natural materials, there will be a slight colour variation in every production run of concrete masonry units,
For consistEnt colour, request that all units be run at one time for your project
Block colour can vary between manufacturing runs, based on slight differences in climate and source materials, thus, it is highly recommended that for projects where consistency of colour is important, you should indicate in your contract documents that “All Concrete Masonry Units Shall Be Run At One Time For This Project”. Note: this is particularly important when ordering Base Colour CMU, since it can otherwise be sourced from in-stock material from various sources, each of which would likely have been made at varying times, resulting in unpredictable colour variation.
Block colours are regional
Block colours are regional and are tied to locally available aggregates and materials. Before selecting colours for a project, ask yourself: “Where is my project located?”. Don’t wait until the bidding stage of a project to determine the right product for your project.
Concrete Block Colours are grouped into
The majority of the colours available for CMU are considered to be “Standard Colours”. And among the standard colour options, there are hundreds of possible combinations of aggregate colours and iron oxide pigment colours available, again, available in LW, MW and NW mix designs.
Standard colours include : Natural, Charcoal, Sandstone, Tan, Sahara, Salmon, Cardinal Red, Autumn Red, Rosebuff, Burgundy
Some of the more specialized colour options include those containing either a “white cement” or “block cement” (rather than the normal grey cement), and/or those including a specialty aggregate, (such as dolomite), and/or those using a rarer colour of iron oxide pigment (blues and lavenders, for instance, can be more expensive than most other iron oxide pigments).
Premium colours include : Ebony, Cream, Glacier White, 70/30 White and Pure White
It is important to note that the cost of the concrete masonry unit itself is just a small percentage of the overall cost of the installed masonry wall system, (which typically includes the CMU + footing + rebar + mortar + grout + transportation + labor).