1. 

   J.P. New Member

   Evening guys. I am going to screed my extension floor and was wondering what sharp to OPC ratio to use. 3 sharp to 1 OPC, or 4 sharp to 1 OPC? Also any additives needed? I am going to use fibres in the mix, but was wondering about additives also. Thanks guys.

    

   J.P., Jan 18, 2013

   #1
2. 

   petertheplumber New Member

   I am no pro builder but when I used to help a builder the mix was always 3 sharp 1 OPC with no additive.

    

   petertheplumber, Jan 18, 2013

   #2
3. 

   J.P. New Member

   Thanks Pete.. I will use 3 -1.

    

   J.P., Jan 19, 2013

   #3
4. 

   nearnwales Member

   3-1 or 4-1 is fine make sure you seal the concrete first with pva or better still sbr.also wear over pants as the burn it great ..once floated run a steel trowel over it.

    

   nearnwales, Jan 19, 2013

   #4
5. 

   J.P. New Member

   Thanks Nearnwales

    

   J.P., Jan 20, 2013

   #5

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