Variation of colour...help needed!

[Jwaspy]

Just needed some advice as hearing conflicting answers. I've had a property rendered with sand, white cement and lime. There is a variation on colour in certain areas. The plasterer is saying it was because of rain but I'm not convinced. Spoken to Lafarge and they've said its to do with the sand...can someone please help?? I have attached a photo

 

[User________removed]

Maybe a different supply of sand,or not bucket gauged. Out if interest what's lafarge got to do with it mate ?

 

[User___removed]

This type of coloured render is never going to look great compared to a bagged through colour.it would have to be gauged perfectly for the colour to be 100%.
It being a different colour under the window would suggest it is weather related as this area rarely gets the rain.
Using a float to finish the wall would also cause colour variations which you don't get from a through colour

 

[User___removed]

Maybe a different supply of sand,or not bucket gauged. Out if interest what's lafarge got to do with it mate ?

There white cement I imagine

 

[Rigsby]

Looks like water has ran down it and bleached it. Nothing to do with the sand as the sill is a giveaway.

 

[Jwaspy]

Maybe a different supply of sand,or not bucket gauged. Out if interest what's lafarge got to do with it mate ?

Oh it was the make of white cement so thought I would call them. They said different sand or if sand was wet/dry there is a variation in the weight so mix would have to be adjusted??

 

[Jwaspy]

There white cement I imagine

Yes, they've said it would be anything to do with the cement as the white is white??

 

[Jwaspy]

Looks like water has ran down it and bleached it. Nothing to do with the sand as the sill is a giveaway.

Thanks, just wondered how rain water would bleach it?

 

[kgreigh]

I think the plasterer is right, it looks like the rain is the culprit.

 

[jet]

Why would you not believe what your plaster has said ?
like above reply with cill .
Easiest job in world to pull someone's work
He said she said ,will just create a witch hunt for plaster.. talk to your contractor

 

[CTPlastering]

Between the 2 colours it looks like you can see where water has ran down in lines .......

 

[CTPlastering]

Between the 2 colours it looks like you can see where water has ran down in lines .......

 

[Rigsby]

It washes the cement out of the surface. Under the sill is richer in cement than to the right of it. The water can also cause lime bloom.

 

[FreeD]

Just paint it white.