Paint peeling off of contract matt

Painting and decorating, plaster mouldings, Artexing questions

Moderator: Moderators

Post Reply
jamiepoole84
Newly registered Member
Posts: 4
Joined: Sun Jun 03, 2018 6:28 am
Has thanked: 0
Been thanked: 0

Paint peeling off of contract matt

Post by jamiepoole84 » Sun Jun 03, 2018 6:39 am

Hi,

We are currently redecorating a room that was replastered and decorated only a couple of years ago.

We have decided to have a feature wall and to ensure a crisp line have masked the edge of the wall in the corners.

On taking off the tape (frogtape delicate surface) the old paint beneath is peeling off. Where it's started peeling it can easily strip off.. I think I could peel off large sections quite easily.

Now, if this was back to the plaster I could understand that t was the mist coat that had failed. But it's peeling between the (leyland contract matt) mist coat and the previous top coat of regular matt dulux.

The wall was clean etc. when the dulux was applied 2 years ago.

Any thoughts on why this may be occurring?

Now I have lots of surface filling and repaint to do. I should have accepted my cutting in!

Thanks
Rorschach
Senior Member
Posts: 3724
Joined: Wed Feb 26, 2014 9:35 pm
Has thanked: 46 times
Been thanked: 755 times

Re: Paint peeling off of contract matt

Post by Rorschach » Sun Jun 03, 2018 7:01 am

Is it a kitchen wall? or near the kitchen?
jamiepoole84
Newly registered Member
Posts: 4
Joined: Sun Jun 03, 2018 6:28 am
Has thanked: 0
Been thanked: 0

Re: Paint peeling off of contract matt

Post by jamiepoole84 » Sun Jun 03, 2018 7:16 am

No it's a bedroom wall that is not near a bathroom or kitchen.

There are no damp problems in the wall either.
OchAye
Senior Member
Posts: 4292
Joined: Thu Apr 14, 2011 6:33 pm
Location: Dundee, Scotland.
Has thanked: 777 times
Been thanked: 893 times

Re: Paint peeling off of contract matt

Post by OchAye » Sun Jun 03, 2018 8:17 am

Did you mist coat the wall when it was newly plastered? Did you do a 50/50 dilution paint with water?
jamiepoole84
Newly registered Member
Posts: 4
Joined: Sun Jun 03, 2018 6:28 am
Has thanked: 0
Been thanked: 0

Re: Paint peeling off of contract matt

Post by jamiepoole84 » Sun Jun 03, 2018 9:45 am

The mist was about 30% water.

The mist has adhered to the wall ok. It's the dulux on top that's coming off.

Maybe a bad batch of either the Leyland or dulux is all I can think it is.
Rorschach
Senior Member
Posts: 3724
Joined: Wed Feb 26, 2014 9:35 pm
Has thanked: 46 times
Been thanked: 755 times

Re: Paint peeling off of contract matt

Post by Rorschach » Sun Jun 03, 2018 9:48 am

That's a strange one.
OchAye
Senior Member
Posts: 4292
Joined: Thu Apr 14, 2011 6:33 pm
Location: Dundee, Scotland.
Has thanked: 777 times
Been thanked: 893 times

Re: Paint peeling off of contract matt

Post by OchAye » Sun Jun 03, 2018 10:32 am

There are two possibilities.

a. If the mist coat had too much water[*] and too little paint, the next coat of paint dried too fast by having its water absorbed into the plaster, hence the peeling off. That is, the mist coat did not do its job well enough.

b. the 1st coat of Dulux paint was applied in full thickness and a bit of absorption back to the above.

People complain about Dulux retail on this forum, I cannot say much as I do not know. There may be other explanations but since the mist coat is still on the wall, the mist coat has not failed but it may not have been good enough. And the weaker the mist coat the more likely to stay on the wall as long as there was no previous contamination. It is just that with a poor mist coat it is the next coat that will fail.


--
[*] Find the Leyland website and check the max dilution for the paint you used, and it may also specify the max dilution for mist coating. It may be 10% or more. The max dilution spec by the manufacturer is not to make people use more paint but there so many binders and other things in the paint that if diluted too much it won't do what it is meant to do.
User avatar
wine~o
Senior Member
Posts: 24690
Joined: Sat Jan 10, 2009 3:49 pm
Location: hants/dorset border
Has thanked: 1325 times
Been thanked: 3632 times

Re: Paint peeling off of contract matt

Post by wine~o » Sun Jun 03, 2018 6:02 pm

OchAye wrote:There are two possibilities.

a. If the mist coat had too much water[*] and too little paint, the next coat of paint dried too fast by having its water absorbed into the plaster, hence the peeling off. That is, the mist coat did not do its job well enough.

b. the 1st coat of Dulux paint was applied in full thickness and a bit of absorption back to the above.
That sounds likely enough. assuming trade dulux. Trade emulsion will want diluting 10ish % depending on the day ...
retail emulsion will want 80 % of trade paint adding coz retail paint is 90 % water... :hiding:
These users thanked the author wine~o for the post:
OchAye
Rating: 7.14%
Verwood Handyman

Verwood Handyman


___________________________________________________________________

If you feel you have benefited from the Free advice given on the Forum, Please consider making a donation to UHM's Nominated charity, read all about it and donate here :

http://www.donnasdreamhouse.co.uk
OchAye
Senior Member
Posts: 4292
Joined: Thu Apr 14, 2011 6:33 pm
Location: Dundee, Scotland.
Has thanked: 777 times
Been thanked: 893 times

Re: Paint peeling off of contract matt

Post by OchAye » Sun Jun 03, 2018 10:57 pm

Croon ;-) goes to 40%. By appointment to Lizzy too :thumbleft:
jamiepoole84
Newly registered Member
Posts: 4
Joined: Sun Jun 03, 2018 6:28 am
Has thanked: 0
Been thanked: 0

Re: Paint peeling off of contract matt

Post by jamiepoole84 » Mon Jun 04, 2018 5:50 am

Thanks for all your thoughts. I hope the same isn't true in all the other rooms!

Anyway, I've now cut back the worst of the loose paint, filled with TX110 and started painting. Needs one more coat and it shouldn't be too noticeable.
User avatar
Tom d'Angler
Senior Member
Posts: 3528
Joined: Thu May 21, 2009 6:18 am
Has thanked: 811 times
Been thanked: 428 times

Re: Paint peeling off of contract matt

Post by Tom d'Angler » Mon Jun 04, 2018 6:45 am

retail emulsion will want 80 % of trade paint adding coz retail paint is 90 % water...
:lol:
OchAye
Senior Member
Posts: 4292
Joined: Thu Apr 14, 2011 6:33 pm
Location: Dundee, Scotland.
Has thanked: 777 times
Been thanked: 893 times

Re: Paint peeling off of contract matt

Post by OchAye » Mon Jun 04, 2018 2:31 pm

jamiepoole84 wrote:Thanks for all your thoughts. I hope the same isn't true in all the other rooms!
When you stick masking tape on try to only stick properly the side that is on the side to be painted. Then do not remove by pulling at 90 degrees but turn it on itself and pull it off at 180 degrees.
Post Reply

Return to “Painting & Decorating Forum”