Greengates Builders Merchants

Have You Checked Your Render? Greengates Builders Merchants Accrington, Lancashire

At this time of year you need to be thinking about making those final repairs to your homes before winter sets in and we have freezing conditions.  Even a small amount of frost can make render damage worse.

Due to normal weathering, renders may crack, degrade or de bond. Hollow or de bonded render can be found by tapping the render, if it makes a ‘hollow’ sound then it may be coming away from the wall.

To repair render:

  • Remove the hollow de bonded render from the wall- correct preparation of the background surface is essential.
  • The surface must provide a good key. It should be clean and sound; an external bonding agent is recommended.
  • The patch repair should be of a similar mix proportions to the original render and would typically be a 1:4 or 1:5 (cement: sharp sand volume) mix.

The cement used for this type of job would be Ordinary Castle Cement. The strength requirements of renders are widely varied and this particular cement is designed to be adaptable in performance to accommodate the requirements of the application.

Cement is suitable for use in all types of renders. Care should be taken to ensure that the surface to be rendered is clean and free from dust. Mixes for successive coats should neither be stronger nor thicker than the previous coat. Each coat should be allowed to cure for several days before a subsequent coat is applied.

Ordinary Castle Cement is perfect for rendering. It is a cement which enhances susta­ina­bility through the use of carefully selected recycled raw materials, reducing the carbon footprint of the cement.

 What you will need for this job:

  •  External bonding agent
  •  Cement: sharp sand mix: Castle Cement

 Ring Us Today And Get Your Materials Delivered Before We Have Any Frost


Greengates Builders Merchants delivering to the whole of Lancashire including: Accrington, Blackburn, Burnley, Clitheroe, Darwen, Great Harwood, Haslingden, Padiham and Pendle.

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