Relaxing after a hard day learning decorative cement from Cindee Lundin

Even the gridlines on the map are polished plaster

One of the more interesting things about the project from a technical point of view:  The substrate walls were pretty rough.  Rather than do the standard prep of smoothing the surface out prior to polished plaster, Tina and the crew went directly over the rough substrate which ended up looking wonderful and giving the feel of those ridges under the ocean and the waves on top.  I could look at that blue wall all day.

Fun stuff

Here’s a not very well kept secret – these guys serve some of the best cocktails in Seattle

Thanks to Sun Liquor for being such a cool place and supporting the local artisans in our town

Tina Randolph just started using Stucco Italiano plasters which she says she now loves.  She’s been doing awesome decorative work all over Seattle for many years, including some great stuff in Top Pot Doughnuts which is owned by the same folks who brought us the new Sun Liquor.  I’m hoping to interview Tina next week for the blog and post some more jobs that she’s done.

Our February 2011 Newsletter

This months newsletter just went out – here’s a link to the online version.

If you’d like to receive our newsletter in the future there is a link to sign up on that page.

“…out 300 pages in the new catalog, 60% of the photos involve Plaster Walls and Plaster Mantels…” Read the whole post here.

5 things you’ve probably heard about Venetian plaster, and why they are wrong:

1. You’ve heard: “Venetian plaster is a faux finish.”

The truth: Authentic Venetian plaster is not a faux finish. In fact, it’s the most authentic veneer wall finish you can have. When natural, lime-based venetian plaster is applied it will eventually return to it’s original state, which is lime and marble, AKA stone.

2. You’ve heard: You can buy Venetian plaster at Lowes or Home Depot.

The truth: You will find products labeled “Venetian plaster,” but they are actually composed of acrylic polymers and fillers such as gypsum and/or clay. While these synthetic Venetian plasters made by paint manufacturers may look somewhat similar to the real thing to the untrained eye, it’s been our experience that these synthetics will ultimately fade and become “tired” looking over a relatively short period of time, just like painted walls. Unlike real Venetian Plaster, synthetic Venetians are more closely related to paint than to stone, so this should come as no surprise.

3. You’ve heard: Venetian plaster can’t be applied in the shower, on exteriors, or on any surface that will get wet.

The truth: True Italian Venetian plaster is actually a wonderful choice for surfaces that will get wet. Lime plasters perform extremely well in wet climates by simply allowing any water that is absorbed into the plaster to quickly evaporate and exit the structure. That’s why they’re called Venetian plaster, because they can tolerate rising damp and canal-side applications like in the lagoons of Venice that would cause failure in acrylic and cement plasters. Traditional Moroccan lime plaster Tadelakt has been used in the Hammams (the traditional Moroccan steam baths), and in the riads of Marrakesh for centuries.

4. You’ve heard: Anyone can apply Venetian plaster in their home.

The truth: Well, it’s true that anyone can apply it. But applying it well is a different story. While we definitely aren’t saying you’ll be a pro after one day, our new Introduction to Authentic Venetian Plaster is a good place for a beginner to start understanding the do’s and dont’s of Venetian plaster application. Also, consider hiring a skilled contractor to do the job.

5. You’ve heard: Installing Venetian plaster in your home will break the bank.

The truth: Unlike paints which must be reapplied over and over, Venetian plaster is a lifetime finish. The material is self-healing, much less likely to crack than cement finishes, and naturally mold-resistant, resulting in beautiful walls that will withstand the test of time. Green building will be a key part of America’s economic future, and authentic Venetian plasters are not only beautiful, they fit perfectly into the future of green building.

6. You’ve heard: Venetian plaster is really shiny.

The truth: OK that’s 6 things not 5 you caught me. Yes, Venetian plaster can be brought up to a natural high sheen by compressing the material as it dries. The more compression, the higher the sheen. However, natural lime plasters can also be finished to a rustic matte or satin sheen, depending on which material is used and how it is applied. The possible looks and finishes for Venetian plaster are limitless!

Got any more questions about Venetian plaster? Ask away in the comments and we’ll do our best to shed some light on the subject.

On Dec 30, 2009, at 12:39 PM, sherri@******** wrote:

Hi Kay Lynn and Aaron -
I designing the surfaces for a huge residential project and would like to specify Tadelakt for the showers and accent walls. A couple questions:
- How much p sqft is the going install rate for Tadelakt?
- As the installer, how can I ensure that the Tadelakt is truly waterproof?
- I would like to use Tadelakt for an adobe style fireplace (steel frame w/ cement board substrate). Will the olive oil soap cause any problems with the heat from the fireplace? Does applying the olive oil soap affect surface breathability sim to other waxes?
Thanks a bunch for all your help throughout the years!

Cheers -

Sherri

Hi Sherri,

Apologies for the delayed response.  Install rates for Tadelakt can vary considerably, especially when doing smaller areas like showers.  I’d be looking in the $15-$25 per sq foot range to give yourself the time necessary to do those areas properly.  For straightforward walls it’s probably about twice as labor intensive as a basic AC wall and the material cost will be around $2 – $2.50 per sq foot.
Waterproof is not the right word for traditional Tadelakt finishes. Tadelakt plus olive oil soap applied properly should be described as hydrophobic(water-repellent).  The substrate preparation is very important of course.  Traditional Tadelakt will stain over time in high moisture areas although this is not a sign of failure of the material – it is actually a testament to the fact that the surface remains breathable.  We have a water-based carnauba wax which will give an added level of water repellency after the surface is applied, but I’d be careful not to guarantee there will be zero water staining over time even with that wax.  The Lucido wax is low but not a zero voc product.

Only issue with fireplace is that the soap will not protect against high-heat discoloration if flames are lapping over the surface.  But the soap is not flammable in any way.  The olive oil soap allows the surface to remain breathable.

We’re getting tons of requests to do some Tadelakt classes – seems like interest in that particular material has really surged this past year.

Talk to you soon,
Aaron

Here’s a Stucco Italiano Tadelakt floor installation done in Santa Fe last October:

If I may quote Kit:

Designers in France are using it today for its silky texture and indescribable patina, which are unmatched by any other plaster finish available. It is absolutely stunning.”

Couldn’t have said it any better myself.  Here’s a link to the full post.

We love Tadelakt for walls, showers, floors, it’s a wonderful material.

Thanks also to Canadian Master Plasterer Steve Manby for turning me on to the post through his lime green plaster blog.  Check out the black exterior Tadelakt project he did this past spring in the Vancouver, BC area on a contemporary home. Very impressive.  Here’s a couple of photos:

That’s is LAME.  I’m a bad blogger, what else can I say.

I’ll blame it on Twitter.

OK I’ll make it up to you – I’ll post something fascinating about Venetian Plaster or Tadelakt or something equally compelling every day for the next week at least.  Then I promise to post no less than twice a week no matter what.  Hopefully making this public will give me some extra motivation as well as some accountability.

It’s been a great summer for us – hope all is well with you all out there.

Aaron

People are becoming more and more concerned about indoor air quality. Homes plagued with VOCs (Volatile Organic Compounds) or mold can negatively impact the health of the occupants. According to Green By Design, “an estimated 15% of the U.S. population — millions of people — are chronically ill from their homes, and indoor air quality is a major factor.”

If you are using Venetian plaster, you might want to check out some info on indoor air quality around the web:

• The EPA’s guide to indoor air quality

• Wikipedia on indoor air quality

• Treehugger on causes and testing of poor indoor air quality

• Build It Green explains that “A common source of indoor air pollution is the offgassing of chemicals found in many building materials…”

• There’s even an Indoor Air Quality Association…

Have you noticed a difference between working with non-toxic Venetian plasters versus acrylic finishes? Tell us about it in the comments…

Steve Manby of Authentic Plaster FX posted on his blog about Aaron checking out his black Tadelakt exterior.

Hopefully he’ll send us more pics soon!

1 - Stop the cracks – Can you do an exterior?  Sure!  Can you do a shower?  Sure!  But you gotta stop the cracks.  So you have to know what you are doing.  Or hire someone that does.  And a very important point to bear in mind – lime does not crack by itself.  But it cannot bridge cracks. It adheres to whatever substrate it attaches to.  So when the substrate cracks the lime plaster cracks with it.  And never promise a crack free finish because if you do not actually do the substrate construction and preparation how can you guarantee the thin veneer of decorative plaster we apply will hold?  This often falls outside of our area of expertise and responsibility.

That being said, EIFS mesh and primer systems usually work pretty darn well, in my experience.

MESH AND BASECOAT

2 – Penny wise pound foolish  (AKA prep with the good stuff, you’re worth it!) – So you gotta fill a wall that has orange peel texture because you want to run a nice shiny plaster over it.  So you get out the joint compound because it’s cheap.  You skim.  Then you sand.  Then you prime.  Twice.  Then you can apply your lime plaster.  Hey but wait a minute, why didn’t you just skim with our Marmorino Classic and then do your finish right over it?  Because it’s so damn expensive you say?  But think about it -  if you skim with the good stuff you’ll already have your first coat of lime plaster on.  You’ll have the proper suction and you can do your final coats the next day.  The money you spend on materials (joint compound vs lime plaster) should be more than offset by the money you save on labor, no?

3 – Scrape don’t sand – Got some excess gunk on the walls before you start?  Or did you get some trowel lines from your first coat?  Before you throw up the giant cloud of dust with that sandpaper try breaking out a putty knife and scraping.  Less work, less dust, more better.

4 – Taping – it’s not paint – Yes it’s not paint so don’t tape right up to inside edge of where your wall meets your baseboard or crown molding or whatever you are protecting.  Otherwise you’ll bury your tape underneath your plaster and it will chip or crumble off when you remove your tape.  Allow for the thickness of the plaster material you will be using and tape away from the wall by 1/16″ or more depending on what material you are using.

NOT LIKE THIS

LIKE THIS

5 – Do not assume the people doing your prep are going to do it properly.  Unless they work for you. And then only if you know what you’re doing.  Which is debatable.