Sacred Circle Fire Pit: Google Maps View

Hammerhead completed the Sacred Circle Fire Pit in January of 2014 for clients hoping to use the space for ceremonial gatherings. The photo below is of the fire pit after completion from down here on solid ground.

And here is a photo of the completed fire pit from Google Maps from up above.

This is the Google Maps photo from before the project was completed. Note the 7 small squares below the site. Those are pallets of stone we brought down to build with.

And back on the ground.

Phoenix Stone Mosaic: Coming Soon!

This phoenix stone mosaic is in progress as part of a public art installation in public schools in Norfolk, VA. The Hammerhead crew leaves this week to install it there.

The Phoenix Head

phoenix stone mosaic

The original concept for this artwork was a Great Blue Phoenix. Equally inspired by the rugged beauty of the great blue heron and the strength and persistent lives of the mythical Phoenix, the color theme was to be blue and gray. But I ran into a problem finding blue stone! Always expensive, there are very few types of truly blue stone that are made into tiles and sold in the United States. So I had to pivot…
Now the Phoenix is just a Phoenix. I think you can see the hint of the heron in this image of the Phoenix’s head.

The Workshop

phoenix stone mosaic

This table is my happy place. I have spent many hours here cutting templates and tracing patterns on to stone. Sometimes it’s hard to find a place to work because there’s so many tile choices on the table. A large map of the whole mosaic hangs over the table and is a useful reference. Hanging over the map is the phoenix tail, awaiting stone choices and cutting.

Design Reversal

phoenix stone mosaic

After we finished cutting the piece, we started laying it out. In a manner common to mosaics, we are laying it face down. Once we have established that we like the fits between stones, we are going to glue it to the paper. Then, we’re going to epoxy mesh to the back. Instead of 500 individual stones, we will have approximately 20 panels of stone to install.

Phoenix Detail

phoenix stone mosaic

By the nature of this process, we have never seen the completed mosaic all together in one place. I guess I can see how that would be a liability, but I prefer to think of it as a opportunity. It will be exciting to see it on the wall, for the first time, with the kids who it is for. It will be a surprise for all of us!

Phoenix Stone Mosaic: Feathers

phoenix stone mosaic

We have been calling these shapes scallops. They are a main element of the wing design. I made no effort to arrange the colors, preferring to let randomness take its course.

See some completed stone mosaics in this series in Norfolk, VA here and here.

Montreat Big Wall

 

Montreat Big Wall

Montreat Big Wall almost 20 years after completion

Montreat Big Wall

I helped build this wall when I worked with Fred Lashley at the Unturned Stone. We built it 18 years ago and it remains the tallest drystone wall I have ever worked on. At its tallest, it is 7 feet high. Made mostly fieldstone from Maggie Valley, we supplemented with Hoopers Creek, which shows up as the rusty colored faces in the pictures.
The wall is in Montreat and I like to visit when I make my way out to Black Mountain. It is an impressive structure. It looks largely the same now as it did then, except for the glorious patina of lichen. I don’t think I will ever build another wall so tall.

Codes? What Codes?!

These days there are building codes that limit the height of a retaining wall. In a residential setting, like this, the max is 48 inches tall. Anything taller, must be signed and sealed by a licensed engineer. In general, engineers don’t love stone walls. They like things that are consistent and predictable and more easily quantified than the crazy ecology of a stacked wall. The human elements– care, intention, and experience – that the builders put into the structure cannot be factored into mathematical formulae.
Drystone walls have fallen out of favor in preference for segmented block, prefabricated panels, and poured concrete structures. They are all the same and more easily analyzed. It’s an apt metaphor for the state of modern society, our blind devotion to conformity and standardization.
When building with prefabricated predictable materials, it matters much less if the people building care at all about what they’re doing. And if you can subtract care from the process, you can subtract cost. It’s always cheaper if you don’t give a shit. Until later…

Montreat Big Wall

Montreat Big Wall – a close-up

Whether or not the same codes were in effect 18 years ago, I don’t know; I just worked on the wall and was not much involved in the process that brought the project to be. I know it was subcontract work, for a landscape guy in Black Mountain with a stellar reputation and very organized and disciplined approach to his work. If anyone was likely to get the necessary approval, it would have been him. To my eye, the wall has not moved at all and I see no evidence of it having needed repairs for the last 18 years.

What Makes it Stay Up?

I get a version of this question quite frequently, especially when people discover that we usually work without mortar or concrete. The answer is amazingly complex, but I generally begin with a very simple answer: gravity and skill.
I’ve already mentioned how important care is in the creation of a structure like this. Care plus practice equals skill.
The rules that govern the construction of a drystone wall are simple and robust: two over one and one over two, end them in, maximum contact – minimum movement, batter back, the top must sit over the bottom, weather always wins. From the simple rules emerge an infinite number of possibilities. Bird flocking is often used as the epitome of the principles of emergence – simple rules lead to complex (and beautiful) results. A drystone wall is another stunning example.

Two Over One: One Over Two.

This is a very simple principle that you must cross your joints. Tall vertical lines in masonry construction– often called running joints – weaken the structure significantly. Crossing joints – imagine the traditional running bond of the most common brick wall – creates a network. That web of dynamic forces is fundamental to what holds a wall together.

End Them In

Another simple rule, stones should run deep into the wall. Sometimes, in an effort to conserve their rock pile, people will use the long side of a stone as the face. This is called tracing and it makes for a shallow structure and therefore a weak wall. If you have a stone that shaped like a french fry, run it long into the wall.
In the picture below of the wall being constructed, there’s a guy who’s not me or Fred. I think his name was Brian and he wanted to be a stonemason. After a little while he decided he wanted to be a building inspector or maybe a social worker. It was probably a wise choice.

Montreat Big Wall

Montreat Big Wall under construction

Maximum Contact – Minimum Movement

The next stone you put in should make as much contact as possible with the stones that are already in the wall. And so on and so on.
One of the great attributes of a dry stone wall is its flexibility. It has the capacity to move and therefore respond to environmental factors. The day-to-day expansion and contraction that comes with being heated by sunlight and cooled by frost may cause minuscule movements in a wall but not crack it apart. It is not supposed to be a rigid structure. Inflexibility fails in walls, as in life.
Minimal movement is a great attribute. On the other hand, stones that pivot from side to side on a single point cause trouble. Maximum contact, minimum movement is where practice becomes most important to a wall builder.

Batter Back

A good dry stone wall has a slight backwards slope to its face, called the batter. Imagine the wall leaning into the hillside which it is intended to retain. This strengthens the wall and gives it leverage against the slope behind it.

The Top Must Sit Over The Bottom

Lean back, but not too far. The top of the wall, where your caps rest, must be sitting squarely over the bottom of the wall. It is a common beginners mistake to lean the wall back too steeply. A very steep batter on the face will have the top of the wall sitting over soft soil backfill instead of the hearty structure of the wall. The weight of the cap will compress the soil. The path of least resistance for that soil will be forward; it will blow out the bottom of the wall, collapsing the whole structure. This is where the concept of gravity really comes into play with the construction of the wall. With practice and care, gravity is a great ally.

Montreat Big Wall

Montreat Big Wall almost 20 years after completion

Weather Always Wins

Fundamentally, all construction is an attempt to resist the forces of weather. And while weather is not a singular force, in my experience, water is the prime mover.
Almost all of the structures we build live their lives in the weather. We have to constantly be conscious of what happens when it rains. Where does the water go? Where does it collect? What happens when it freezes? What happens when it builds up or when it moves the earth?

With this particular wall, so tall and at the bottom of such a steep bank, managing water was a primary concern. We lined the cut bank behind the wall with a filter fabric that allows water to pass through, but holds back the soil. In addition to keeping the backfill of the wall from getting silted up, it prevents red clay from washing through the wall and staining the face.
This wall is also very deep or thick, depending on how you want to look at it. Behind the face there is an enormous amount of ugly stone, chips, and gravel. Rain water runs through it and does not linger long enough to build up hydrostatic pressure, the force that pushes over so many rigid, impermeable walls. There are no drain pipes behind the wall, because the whole wall functions as a drain.

Eighteen years and counting.

Stone Workshop with Clemson Landscape Architecture Students

Stone Workshop

Photo by Mary Padua

Mary Padua, a professor in Clemson’s landscape architecture department, brought her students to our shop for a brief tour. We talked about stone and craftsmanship, including slightly odd aphorisms, like ‘construction is emotional’ and ‘get good at failure.’ After that they went to the First Baptist Church to see the Sacred Garden, where Hammerhead completed several projects. They also met with Vision Design Collaborative’s Ryan Blau, one of the Garden designers who involved us in the project.

(Check out some of our work in the Garden here and here.)

Stone Workshop

Photo by Mary Padua

Black Mountain Stone Wall and Steps

Black Mountain Stone Wall and Steps

Black Mountain Stone Wall and Steps

Crew members from left to right: Jonathan Frederick, Tony Costa, & Michael Sellars


Written by Marc Archambault

We spent about a month this summer building steps around a recently completed modern house in Black Mountain, North Carolina. Designed by architect Scott Huebner of Brickstack Architects, the house has majestic views from its steep lot. Our primary job was to provide access for the homeowners so that they can tend their gardens and landscape. Really it was more like backcountry trail construction than our typical more finessed style of work. However, the real fun was when we got to replace a very sloppily built boulder wall at the driveway.

To hear it described, the wall in question was a last-minute add-on. It certainly looked very thrown together, with large gaps, no attention paid to bonding, and lots of gravel between the stones as if using ball bearings as a substitute for mortar. It was nothing to look at, for sure. Adding insult to injury, other tradespeople had mistreated it. Someone had smeared a lot of polyurethane on a few stones, presumably cleaning their brushes. There were similar concrete stains in other locations. All in all, it was a very ugly wall.

So we took it down and rebuilt it. I would say it’s built in the style of our typical walls, but at an uncommon scale. Some of these pieces weigh over 1000 pounds and it required an excavator – a small one – to help move the material into place. The stones with the stains were either removed or turned around to hide the mess. We used hammer and chisel and- as appropriate- the big saw to sweeten the fits and to ensure good bonding. The previous wall had no attention paid to batter or a clean line to the face of the whole wall. We took care of that and the results are pleasing.

I should have done a before and after post, but the original wall so ugly I never thought to take a picture of it. If I find a picture, I will surely add it.
To me, true craft is about caring. The devil is in the details.

Black Mountain Stone Wall and Steps

Photo by Jonathan Frederick

Black Mountain Stone Wall and Steps

Photo by Jonathan Frederick

Black Mountain Stone Wall and Steps

Crewmember Tony takes a rest on the newly completed wall.


Special thanks to Fred Lashley for operating the excavator on this project.

Natural Stone Mosaic Yellow Wakerobin

Natural Stone Mosaic Yellow Wakerobin

natural stone mosaic yellow

Mosaic Commission

Natural Stone Mosaic Yellow Wakerobin was commissioned as a Mother’s Day gift for a family in Maryville, Tennessee. Named after the species of trillium featured on the piece, it now resides in a niche on a brick fireplace. A conversation with the Mom to be celebrated inspired the design. A heart survivor, she loves the mountains and is devoted to her three kids. The heart shaped leaves of the trillium, which grows wild in these mountains, seemed like a perfect match. And the white dove very much fits the family’s values and aspirations.

natural stone mosaic yellow

Dove and Trillium detail

Mosaic Design

I tried a new technique when I was creating the Trillium Mosaic. Once all the pieces were cut, I flipped them over and placed them on a reversed template. Since I take all of my pencil sketches into a digital space to create my patterns, it’s very easy to reverse the design and have it printed as a mirror image. Working backwards or upside down like this is a very common technique for mosaic artists, but it was the first time that I’d ever tried it.

One immediate advantage is that you can see how well the pieces are actually cut and make quick adjustments. Once I had the fits as I liked them, I applied fiberglass mesh. I used a special epoxy that I trust with stone to adhere the mesh. In the picture you can see tons of little scraps resting on the fiberglass as it sets up. Many mosaic artists will take the piece in that form and bring it for installation. I felt like my pieces of stone were too heavy for that, so I applied it to the backer board right there on the table. The fiberglass mesh was to prevent the stones from moving while I set it.

Mosaic Fabrication

Piecing together the dove

The images below show the two color options for the petals of the trillium. I sent these photos to the customer and they made the call between purple or yellow.

Whoops! I mixed my thinset too wet and then got impatient. As a result some of it used through the joints (pictured below). When I flipped it over, it was well adhered but still green, so I was able to scrape the excess mortar out. It was my penance for impatience.

The mosaic with mortar

natural stone mosaic yellow

All grouted – the dove’s eye is a tiny black stone marble.

Yellow Wakerobin detail

Mosaic Installation

natural stone mosaic yellow

 

Check out some other natural stone mosaics completed by Hammerhead Stoneworks:

Birds of Every Feather

Praying Mantis

The Boy with Antlers

Birds of Every Feather

Natural Stone Mosaic Birds of Every Feather: Fabrication Process

natural stone mosaic birds

Natural stone mosaic completed for Ocean View Elementary School in Norfolk, Virginia.

This collection of images is from the fabrication process of natural stone mosaic Birds of Every Feather, which was designed for Ocean View Elementary School in Norfolk, VA. It is the first in a series of six mosaics I will make for schools in this area as part of a public art commission.

natural stone mosaic birds

American goldfinch, white-breasted nuthatch, American robin

natural stone mosaic birds

American robin, red-bellied woodpecker, mourning dove

As with all of my mosaic work, I fabricated this at my shop before bringing it to the installation site. Making the birds was so much fun! The background, not so much. The eyes of the birds are either glass marbles or small pebbles. In order to save epoxy, I would do several eyes all at once, leading to this weird-looking photograph.

natural stone mosaic birds

The little brown bird is the Carolina wren. While building this at the shop, a Carolina wren built a nest on one of the shop’s storage shelves.

Read more about Birds of Every Feather here and here.

Hammerhead Stoneworks Featured in the Slippery Rock Gazette

The Slippery Rock Gazette recently featured Hammerhead’s Green Man mosaic completed for Green Man Brewery. The article explains in great detail the process of creating the mosaic from the imagineering phase to the finished product. Additionally, readers can learn about why certain stones were selected as well as what a project of this scale entails.

Access the full feature here.

Special Thanks for the Slippery Rock Gazette Feature

We extend our gratitude to Peter J. Marcucci for authoring this feature as well as to Braxton-Bragg, who both publishes the Gazette and regularly supplies Hammerhead Stoneworks with cool tools and cutting supplies.

The full size mosaic in the space as featured in the Slippery Rock Gazette

The full size mosaic in the space Photograph 2016 David Dietrich

GreenMan Mosaic: Brewery is open!

At long last the GreenMan Brewery has officially opened, meaning I can legitimately post images of the natural stone mosaic we built for them. I already had, but really wasn’t supposed to! It is one of our most ambitious projects to date. The 320 square foot mosaic is comprised exclusively of natural stone, all cut and fitted by the Hammerhead crew. Much of the stone is regional, including a lot of stuff from North Carolina. The yes are malachite found in local gem and mineral shops, though it most likely originated in Africa.

Exploring stone choices for the GreenMan Brewery mosaic.

Exploring stone choices for the GreenMan Brewery mosaic.

This is actually the second full scale face I printed and assembled. The first one showed some clear design concerns, particularly in terms of the size of facial features. It’s one thing to draw at screen size. Blown up to eleven feet across and hung up over my head, it was clear the lips were too big compared to the eyes. This printed version fixed those issues and was used to host a meeting with the designer, Krista Lablue and Wendy from GreenMan. The stone samples on the ground helped us choose the palette for the final mosaic. The whole Hammerhead team took part in this meeting, which I think helped us move forward smoothly with the process; everyone had input in the stone choices and had a good understanding of the customer’s vision.

Creating the malachite eyes for the GreenMan Brewery mosaic.

Creating the malachite eyes for the GreenMan Brewery mosaic.

I ended up making the eyes twice. The first time became a test of the concept, which worked! But because the malachite was so costly I only bought enough to make one. I bought more and made the second eye, but there were clear differences in the color and look. I took them apart and rebuilt them mixing the stone randomly and got the look I wanted. The eyes are the only place where we used a more traditional mosaic style, making tiny tesserae. I like the effect though, it is evocative of ancient mosaics, populated with characters like Dionysus and Bacchus.

gren-man-final-17

Here’s a close up of the eye installed.

We built the GreenMan Brewery mosaic at the shop first, right on top of the Labyrinth!

We built the GreenMan Brewery mosaic at the shop first, right on top of the Labyrinth!

We cut and laid out the mosaic at the workshop, detailing the fits as best we could, prior to installation. Space was limited, so we had to build the GreenMan right over the top of the Labyrinth. The green insulation foam guided the fitting of the pieces, all of which had been cut from templates. It proved useful on the installation too…

We used foam insulation as a template and setting guide at the start of the GreenMan Brewery mosaic.

We used foam insulation as a template and setting guide at the start of the GreenMan Brewery mosaic.

Installation began with the eyes, as they needed to be level and centered on the wall. The green foam was perfect for supporting the mosaic pieces on the wall while they cured.

The GreenMan mosaic stares out through the scaffolding as we near the finish line.

The GreenMan mosaic stares out through the scaffolding as we near the finish line.

Even through all the clutter, it was amazing to watch the GreenMan’s towering visage appear on the wall.

The GreenMan mosaic is 20' tall and 16' wide. The face really fills the space.

The GreenMan mosaic is 20′ tall and 16′ wide. The face really fills the space.

The finished mosaic is twenty feet tall and sixteen feet wide. It is opposite the main entrance of the brewery’s new downtown location. It’s the first thing you see coming in the front door. It’s kind of imposing!

A detail of the leaves in the GreenMan mosaic showing several of the native stones we used.

A detail of the leaves in the GreenMan mosaic showing several of the native stones we used.

The face is made of marble from Tennessee. The leaves that surround the GreenMan’s face is mostly native North Carolina stone, though we used a fair amount of slate reclaimed from an old house in Asheville. I’m not sure it’s source. The eyebrows are serpentine. Again, I’m not sure where it comes from, but there’s some of the same stone on older buildings in downtown Asheville, making me think it’s at least regional. The background surround is sandstone from Tennessee.

A close up of the GreenMan mosaic face.

A close up of the GreenMan mosaic face.

Bluestone Patio

A drystone patio of Pennsylvania bluestone and full-color by Asheville masonry company Hammerhead Stoneworks

A drystone patio of Pennsylvania bluestone and full-color by Asheville masonry company Hammerhead Stoneworks


Gary and I built this small patio a few years ago. It’s dry laid over gravel so that it will last longer and drain better than a mortared or concrete slab. The stone is a Pennsylvania mix, comprised of bluestone and full-color, which runs green and brown. A handful of locally sourced mini boulders are included to create visual interest and accent points along the edges. A small, inexpensive project, it really changed the space and made the entry more welcoming.

A dry laid patio of bluestone by Asheville stone masons Hammerhead Stoneworks

A dry laid patio of bluestone by Asheville stone masons Hammerhead Stoneworks