Hi guys,
I have recently replaced (about three weeks) an indoor concrete slab floor and plan to screed it this weekend.
Due to the layer of the screed (25mm) I plan to bonded it using a slurry of pva, cement and water. For extra strength im using pva as an admixture in the cement (1 part pva/1 part water).
One thing i am unsure on is whether I need to seal the surface before laying screed? Unibonds instructions on this are not very clear.
I have tested the porosity of the slab and i would say it is fairly porous.
Any advise would be great.
Alex
I have recently replaced (about three weeks) an indoor concrete slab floor and plan to screed it this weekend.
Due to the layer of the screed (25mm) I plan to bonded it using a slurry of pva, cement and water. For extra strength im using pva as an admixture in the cement (1 part pva/1 part water).
One thing i am unsure on is whether I need to seal the surface before laying screed? Unibonds instructions on this are not very clear.
I have tested the porosity of the slab and i would say it is fairly porous.
Any advise would be great.
Alex