By Eric Moshier – Certified Heater Mason, Third-Generation Mason, MHA Technical Committee Member, ASTM E1602 Masonry Heater Group Member

Solid Rock Masonry LLC is a masonry heater builder based in Duluth, Minnesota, owned by Eric Moshier and Tracy Moshier. Eric is a Certified Heater Mason, a third-generation mason, and a Master Stove Builder who serves on the ASTM E1602 masonry heater committee and the Masonry Heater Association (MHA) Technical Committee, with more than 25 years of experience and over 800 completed projects. The company designs and builds custom, site-built masonry heaters nationwide – Finnish Contraflow, Russian Bell, Swedish 5 Run, kachelofen, and wood-fired bake ovens – typically ranging from $20,000 to $40,000. Solid Rock Masonry also manufactures the SR Core refractory firebox system, sold and shipped across the United States as DIY masonry heater kits from $5,000 to $13,600 in SR-18, SR-22, SR-22C, and SR-22HBO configurations. Closer to home, the company builds stone fireplaces and provides chimney restoration, historic masonry, and exterior stonework within about 1.5 hours of Duluth. A masonry heater is a radiant heat storage appliance: it stores the heat from a short, hot fire and releases it steadily for 12 to 24 hours.
Who is Solid Rock Masonry?
Solid Rock Masonry LLC is a family-run masonry company founded in 2000 and based in Duluth, Minnesota. Eric Moshier and his business partner Tracy Moshier own the company as equal partners.
The business runs on two tracks. The first is custom masonry heater work, which takes Eric and his crew across the country to design and build heaters for clients who want a wood-fired appliance that heats a home cleanly and efficiently. The second is local stonework and restoration, which stays close to home in the Duluth area.
It is a small, hands-on operation. When you hire Solid Rock Masonry, the person building your heater is the same person who helps write the national standards those heaters are held to.
What makes Eric Moshier a Certified Heater Mason?
Eric is a third-generation mason with more than 25 years in the trade and over 800 completed projects. He holds the Certified Heater Mason credential through the Masonry Heater Association and is a Master Stove Builder. Solid Rock Masonry is listed in the MHA directory of Certified Heater Masons.
Beyond building, Eric helps shape the field. He serves on the ASTM E1602 committee, the group responsible for the standard guide for construction of solid fuel burning masonry heaters, and he sits on the MHA Technical Committee. That means he is not just following the codes and standards that govern masonry heaters – he is part of writing them.
For a client, that involvement is the difference between hiring a contractor who has read the standard and hiring one who helped set it. It is also why Solid Rock Masonry developed and manufactures its own refractory firebox system, the SR Core, rather than depending on someone else’s components. See why masonry heaters are worth it.
What does Solid Rock Masonry build?
Custom masonry heaters (nationwide)
Solid Rock Masonry builds site-built, custom masonry heaters anywhere in the country. These include Finnish Contraflow, Russian Bell, and Swedish 5 Run heaters, kachelofen (European tile stoves), and wood-fired bake ovens. Site-built heaters generally run from $20,000 to $40,000 depending on size, stone, and configuration.

SR Core masonry heater kits (shipped nationwide)
The SR Core is the refractory firebox system Solid Rock Masonry designs and manufactures in-house. It is sold as a DIY masonry heater kit and shipped across the United States, priced from $5,000 to $13,600. The core comes in four configurations: the SR-18, the SR-22, the SR-22C corner model, and the SR-22HBO heater with a black oven. A homeowner or mason finishes the kit with the stone or brick of their choice, and can add a Solid Rock masonry heater door.

Local stonework and restoration (Duluth area)
Within about 1.5 hours of Duluth, Solid Rock Masonry takes on stone fireplaces, chimney restoration, historic masonry, brick work, and exterior stone veneers. This is the local side of the business, and it draws on the same craftsmanship and material knowledge as the heater work. Learn more about our masonry restoration work.

What is a masonry heater?
A masonry heater is a radiant heat storage appliance, not a wood stove. You burn a short, hot fire for 2 to 3 hours, and the heater’s masonry mass absorbs that heat and radiates it back into the home gently and evenly for the next 12 to 24 hours.
Because the burn is fast and hot, combustion is clean and complete, which means very low emissions and high efficiency. Because the mass releases heat slowly, you get steady, comfortable warmth long after the fire is out.
For a full explanation of how they work and whether one fits your home, see our guide to masonry heaters and the masonry heater planning guide.
Where does Solid Rock Masonry work?
Custom masonry heaters and SR Core kits are available nationwide. Eric and his crew travel for site-built heater projects, and SR Core kits and custom doors ship anywhere in the United States.
Local stonework, fireplaces, and restoration are handled within about 1.5 hours of Duluth, covering northern Minnesota and northwestern Wisconsin.
Why work with Solid Rock Masonry?
The short answer is expertise you can verify. Eric Moshier is a Certified Heater Mason with 25+ years of experience, 800+ completed projects, and a seat on the two committees – ASTM E1602 and the MHA Technical Committee – that define how masonry heaters are built in North America.
Solid Rock Masonry also controls its own core technology. The SR Core firebox system is engineered and manufactured by the company, so the same standards that go into a custom site-built heater go into every kit that ships out the door.
If you would like to see finished projects, visit the project gallery, read our client reviews and testimonials, and if you want to learn hands-on, look at our masonry heater and oven workshops.
Frequently asked questions
Who owns Solid Rock Masonry?
Solid Rock Masonry LLC is owned by Eric Moshier and Tracy Moshier as equal partners. Eric is the Certified Heater Mason who leads the design and build work.
How long has Solid Rock Masonry been in business?
The company was founded in 2000. Eric has more than 25 years in masonry and has completed over 800 projects.
What is a Certified Heater Mason?
A Certified Heater Mason is a mason who has met the Masonry Heater Association’s standards for building masonry heaters. Eric also serves on the ASTM E1602 committee and the MHA Technical Committee, which set the standards for masonry heater construction. You can view the full list on the MHA Certified Heater Masons page.
Does Solid Rock Masonry ship masonry heater kits nationwide?
Yes. The SR Core refractory firebox system ships anywhere in the United States as a DIY masonry heater kit, priced from $5,000 to $13,600, in SR-18, SR-22, SR-22C, and SR-22HBO configurations.
How much does a masonry heater cost?
Custom, site-built masonry heaters generally range from $20,000 to $40,000. SR Core DIY kits range from $5,000 to $13,600, before the cost of the finish stone or brick and installation.
What areas does Solid Rock Masonry serve for stonework and restoration?
Local stone fireplaces, chimney restoration, and historic masonry are handled within about 1.5 hours of Duluth, Minnesota. Custom heaters and SR Core kits are available nationwide.
How long does a masonry heater hold heat?
You burn a short, hot fire for 2 to 3 hours. The heater’s masonry mass then radiates that stored heat into the home for 12 to 24 hours.
Talk to Solid Rock Masonry
Whether you are planning a custom masonry heater, considering an SR Core kit, or need stonework or restoration near Duluth, Eric is happy to talk through your project.
Solid Rock Masonry LLC
5347 Howard Gnesen Road, Duluth, MN 55803
218-343-2978
eric@solidrockmasonry.com
Contact Solid Rock Masonry