hollows

[daz1968]

what causes hollows in plaster, also when laying on getting a few hollows in work . i am taking my time in spreading to get decent flat finish on first coat and these hollows will appear what am i doing wrong

 

[church]

Depends on what size the hollows are ? it can be just a small miss when troweling ,something not picked up until you have finished or it can come from the substrate not being flat enough which should be sorted out before you skim .

 

[Chris W]

keep your trowel flat..

 

[user_removed]

do you mean slacks (little marks when its drying, look worse when its dry) if so u need to fill them with plaster not fat off the trowel.
fat on the trowel is mostly water so you fill a mark/slack/hollow, the water dries leaving nothing there apart from the slack you tried covering in the first place.

hope this helps mate

 

[irish_spread]

Yep. Sounds like the fat drying out

 

[spunky]

getting on it too early or first and second coating with the same mix and its all pulling in together or its just the odd miss

 

[bodplasterer]

Its hard to say what you are doing wrong with out seeing, Have you ever worked with a spread before?

 

[nelly]

Keeping your trowel flat is the number one thing "new plasterers" never do!

If you have your trowel angled nearer to 45 degrees it isnt letting plaster drop off onto the wall its doing a more of a scraping action.

Are you finding when troweling up that you get loads and loads of fat on your trowel?

 

[Chris W]

thats exactly it...
more pressure + less angle = better finish, quicker set, even colour, more methodical / less haphazard, flatter surface and less energy expended in the long run...
slower to go faster.... (again)

 

[phippsy333]

just also add.....when wet trowelling......look behind the trowel as it moves rather than ahead....sounds stupid but u will see any imperfections as u go along, and can go over them before a problem...and obv all the above ;o)

 

[Nisus]

You shouldn't be getting hollows you rough (Dutch person) ;D