Patchy Paint Finish on Walls

[jaykay8]

Hi guys,

Just coated my living room wall with its second coat of Dulux Magnolia Emulsion. However after drying, there are light and dark patches on areas of the wall.

I have applied two mist coats (underneath) and used a 9" extendable roller.

Should I apply a third coat, or change my approach in applying the paint?

Many thanks

 

[ktuludays]

What was on the wall prior to painting?

From the pics it looks like it could be old wallpaper paste left over

 

[jaykay8]

What was on the wall prior to painting?

From the pics it looks like it could be old wallpaper paste left over

Thanks for your reply. There was nothing on the wall, as it was a fresh plaster skim. I did put two mists coats on prior to adding two emulsion coats.

 

[ktuludays]

Thanks for your reply. There was nothing on the wall, as it was a fresh plaster skim. I did put two mists coats on prior to adding two emulsion coats.

Are those areas a different texture? Do they feel rougher?

 

[jaykay8]

Are those areas a different texture? Do they feel rougher?

They feel slightly rougher, but nothing to major

 

[ktuludays]

They feel slightly rougher, but nothing to major

I'd try sanding and repainting then

 

[opps]

I can't be sure from the images but it looks like "dry rolling". Dry rolling occurs when one doesn't maintain a sufficient wet edge. It may be the case that you are letting the roller run too dry and applying the paint too thinly.

You could try a thicker roller which will carry more paint (eg Purdy Colossus) or add some Floetrol to the paint.

I use the Colossus on both plaster and lining paper. Be warned that they leave fibres behind until washed a few times. In spite of the fact that they are deep nap you should be able to get a smooth paint finish with them.

 

[jaykay8]

I can't be sure from the images but it looks like "dry rolling". Dry rolling occurs when one doesn't maintain a sufficient wet edge. It may be the case that you are letting the roller run too dry and applying the paint too thinly.

You could try a thicker roller which will carry more paint (eg Purdy Colossus) or add some Floetrol to the paint.

I use the Colossus on both plaster and lining paper. Be warned that they leave fibres behind until washed a few times. In spite of the fact that they are deep nap you should be able to get a smooth paint finish with them.

Yeah, that could be the issue. When I paint, I tend to exhaust / drag all of the paint out of the roller before 'reloading'. In addition, I do apply quite a bit of pressure on the roller when painting, which might explain the patchy finish.

The Colossus looks like it will do the job, but £8 is probably a bit steep as I rarely do any painting and have a few spare Harris sleeves.

 

[opps]

Fair enough.

On of the problems with loading more paint on to a short nap roller is that it splurges out of the end. If it does, sometimes you can tlit the roller very slightly so that the splurge is on the other side. Sorry, i appreciate that isn't very clear. Lets assume that you are rolling from left to right along the wall. If you tilt the roller so that you are applying slightly less pressure on the right hand side of the roller the splurge will be on the left hand side and flattened out as you continue rolling.