Рет қаралды 36,039
Can you finish sheetrock with just a lime finish?
Apply a lime plaster finish without the base coat.
Can you apply only one coat of lime finish over the drywall? Of course, you can.
FYI, over-troweling usually lifts the single coat and or causes excessive cracking and bobbling. As there is no base coat for the finish to stick to. The bonding agent is to make sure it adheres, but a base coat has serious suction that acts as a mechanical bond, the glue or bonding agent is a chemical bond. It’s a little confusing that’s why it’s recommended to use a base coat. Cheers
Folks, we are located in Oakland, CA.
FYI, folks, here are all the essential tools we use and recommend on Amazon's website.
www.stuccoplastering.com/tools/
Live long and plaster hats, shirts, and other cool stuff. www.livelongandplaster.com/
Kirk Giordano Plastering Inc.
Send pictures to Jay or myself at our sites below for immediate bids.
www.StuccoPlastering.com/ Kirk’s website.
www.GiordanoPlastering.com/ Jason’s Website.
Naturally, it will undoubtedly be stronger if one applies a basecoat with either Structo-Lite or basecoat lime plasters.
In this video, the homeowner left the strong wood cedar lath on the attached sheetrock, so more strength would have been overkill.
Besides, I had an ulterior reason for just a finish coat in some areas. The sheetrock was bulging past the existing walls, so to add basecoat plus a finish would have created a hump and have been an apprentice move for me.
However, you should know how, why, and when not to apply a base coat.
Are these secrets? Not quite; most journeymen plasterers know this fact or should.
The issues usually occur with DIYers or apprentices and even, yes, some veteran plasterers who don’t understand these simple things.
Allow me to explain how to avoid blistering and separations from the sheetrock.
If you’re NOT going to apply a base coat and want to trowel on a single finish coat.
Apply the finish coat with as few troweling strokes as possible.
Okay, you’re troweled on the finish coat is applied, one-sixteenth of an inch like the bag says? LOL, here’s a reality check. I have often used finish coats up to an inch thick, but you should understand when it’s advantageous to do so. The answer is anytime you want.
Okay, you have your finish on; remember, the thickness means nothing to the next stage.
You wait until your finished coat is almost set.
It will slowly start to darken.
Again, this is the key! Use a few strokes to finish it to your liking, and keep your trowel WET.
If your trowel is dry, it will pull the finish off the wall, bonding agent or not.
Why only a few strokes with a wet trowel?
Excessive troweling can pull or detach your new troweled-on finish coat from the sheetrock, especially if your trowel is not continuously wet.
A dry trowel would be like a suction cup and pull or lift your new finish coat from the sheetrock.
I’m not advocating for you folks to skip the base coat, as it adds strength and has sand.
I’m answering an age-old and often-asked question, Why can’t I apply a single lime finish coat?
So you might ask, what’s the use of a base coat?
If applied first and allowed to set securely to the, let’s say, sheetrock when a finish coat is applied over it, this creates what’s known as a professional plastering mechanical bond that holds your finish coat much tighter than just laying it on sheetrock. And adds strength.
If you decide to apply a base coat when it’s set, you should know to wet, soak, or mist it so that the suction is under control.
If you don’t, whichever finish plaster you apply will instantly have the moisture sucked from it by that thirsty basecoat, thus, spider-checking and blistering.
There are exceptions where a base coat is unnecessary and or foolish.
As in this video; • One coat veneer lime p... , one coat of lime plaster.