Ask a Tradesman
Painting & Decorating Question
Primer on a newly rendered wall
I'm about to paint a newly rendered exterior wall. I've bought Weathercoat Quick dry stabilising primer as I thought I should prime before I use my final colour choice.
The primer says "DO NOT use on new/sound surfaces. If the surface is absorbent, apply a thinned coat of masonary paint."
I thought Primer was the 1st coat! Why shouldn't I use it on a new surface?
It is always a good idea to apply a thin coat of masonry paint water based.
This in itself will seal the wall and you shall have better even coverage with further coats.
It may sound a waste of time but will save time money and increase the quality of the finished job.
Answered 18th Jul 2017
When painting new rendering of external walls, always dilute 25% of a 5ltr tin with water.it seals the walls as it's applied and aids the 2nd coat of masonary paint .you only need stabilising primer if the render is chalky or in poor condition.
Hope this is of some use .
Answered 19th Jul 2017