Awarded as the best online publication by CIDC

What is the purpose of applying spatterdash before rendering and plastering?

Spatterdash is a mixture of one part of cement to one and a half parts of coarse sand with enough water. The mixture is thrown forcibly onto the wall so that the impact removes the water film at the interface between spatterdash and the substrate leading to the improvement in adhesion.

The spatterdash should cover the substrate surface completely and form a rough texture. Spatterdash serves as an effective mechanical key to prevent rendering and plastering material from sliding or sagging. The roughness of spatterdash improves adhesion by providing a positive “key” for plaster to grip. The improper application of spatterdash affects the subsequent bonding of rendering with substrate.

Advertisements

This question is taken from book named – A Closer Look at Prevailing Civil Engineering Practice – What, Why and How by Vincent T. H. CHU.

Share this post

Kanwarjot Singh

Kanwarjot Singh is the founder of Civil Engineering Portal, a leading civil engineering website which has been awarded as the best online publication by CIDC. He did his BE civil from Thapar University, Patiala and has been working on this website with his team of Civil Engineers.

If you have a query, you can ask a question here.

3 comments on "What is the purpose of applying spatterdash before rendering and plastering?"

salimane says:

i am interesting in your informations concerning the civil works

Yasir Rafiq says:

Really helpful stuff. Great work.

Roland says:

I need book that on to do estimate and costing of materials

Leave a Reply

Your email address will not be published. Required fields are marked *

Ask a question