Filler bubbling on internal walls

Joined
23 Dec 2018
Messages
78
Reaction score
1
Country
United Kingdom
Painting the house and in several rooms where I’ve used filler - once sanded down when I come to undercoat the filler is lifting off on the roller ...
could the previous paint be an oil based paint or not? if so is the solution to coat the wall with one of the Zinsser products and if so which or are there any other suggestions as to what it could be ?
Many thanks
 
Sponsored Links
Joined
23 Dec 2018
Messages
78
Reaction score
1
Country
United Kingdom
Just to add. Today I removed the old filler in places and keyed the surface and re filled - this evening there are small blisters again on the surface which suggest it’s not going to stick
 
Joined
20 Aug 2009
Messages
9,268
Reaction score
1,184
Location
Dorset
Country
United Kingdom
How old is the filler? is it new, or some old ancient stuff you had in the shed?

Are you spot priming the filler with watered down emulsion first?

How 'deep' are the holes you are filling?
 
Joined
23 Dec 2018
Messages
78
Reaction score
1
Country
United Kingdom
It’s new about a week ago and kept air tight. The walls were all given a mist coat then a normal strength undercoat.
I feel it must be the type of paint that was originally on the wall that’s not letting it stick
 
Sponsored Links
Sponsored Links
Top