I had my exterior woodwork painted at the end of September into October 2018. It is now flaking in most areas. The paint used was a Sandtex water based product.
The painter has said the problem is probably a result of the wrong time of year, due to a cold snap in October and November being particularly cold. Is this explanation likely and what is the best paint to use?
The primary reason that paint flakes-off in this manner is due to a lack of preparation, especially when using water-based products on top of an existing oil-based finish.
It is essential that all surfaces are properly washed down to remove any grease or contamination, then all surfaces must be thoroughly rubbed down to provide an adequate ‘key’ for subsequent coats to grip on to.
With exterior work especially, this is something that’s easily skimped on because a lot of the work is at height and not easily inspected.
Your painter is correct in so far as the time of year being less than ideal but, if the works were carried out correctly, this wouldn’t lead to the problems you are now experiencing.
Hope that helps?