Graphical Construction Glossary >> Concrete and Concreting. >> Stenciled Concrete

Stenciled Concrete
Concrete that has the surface textured and patterned with a stencil process.

a stenciled pattern

Specialist suppliers have a large range of wax paper stencils in various sizes and styles. They also supply the polymer modified cement based powders and ochres and colourings to complete the process.

  • The process of stenciling is carried out to the drying concrete pavement after the concrete has been screeded and bull floated.
  • Laying of the stencils start just as soon the surface takes on the initial set and concrete is just about hard enough to walk on without damage to the surface.
  • If the concrete is too wet when the stencil is applied then it may sink into the wet concrete and become embedded.
  • Any central features like the one above are placed in position first. If there are to be edge patterns then they are put down at the same time.
  • The main pattern comes in rolls and they are unrolled onto the surface of the still moist concrete.
  • the rolls are about one metre wide and care is taken to match the repeating patterns. The ends are cut to shape with scissors.
  • Immediately the area is dusted with the dry cement based coloured powders to an even depth of say 3mm.
  • No water is added to the powder in general, but the bleed water on the surface of the concrete is sufficient to activate the powder.
  • For this reason timing is critical, not too soft to walk on but not too dry that the dust does not get enough moisture.
  • This short window of time makes it impossible to do large sections of pavement in one pour.
  • A small amount of water can be mixed with coloured ochre or pigment and sparingly splashed on top of the coloured powder to give a random spotted effect if it is desired.
  • At a time later, maybe a couple of hours,when the whole surface is dry the waxed paper stencils are removed.
  • This shows the white natural colour of the concrete where the stencil has bee.
  • It also produces a lot of dried flakes of dried material that comes off the stencil paper.
  • These dried flakes are blown off the surface of the concrete.
  • The concrete is then sealed with a clear sealer that is approved by the manufacturer of the stencil products.
  • The sealer seals the concrete and ensures good curing for the finished pavement.
  • Usually another coat of sealer is applied the next day and it is normally recommended to re-seal the concrete on an annual basis thereafter.

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Please Note! The information on this site is offered as a guide only!  When we are talking about areas where building regulations or safety regulations could exist,the information here could be wrong for your area.  It could be out of date!  Regulations breed faster than rabbits!
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