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North House Folk School
North House Folk School

Masonry Heater Building

Masonry heaters originated in Northern Europe where winters were cold and fuel wasn’t always plentiful. The natural response? Create a wood-fired presence that was at once incredibly efficient and highly attractive, capable of generating abundant heat and ideal for cooking/baking. Masonry heaters are built with fire bricks and utilize their high mass to radiate heat for 12 - 24 hours, a feature which means they only need to be fired once or twice per day. Students in this course will build a classic masonry heater with techniques that can be applied to all types of masonry heater designs. Bricks will be laid with clay, rather than mortar, as the heater will be disassembled at the end of class. Students will experience and discuss heater design, sizing options, brick selection, oven integration, door and hardware installation, code considerations, and tool use. An exterior finish of clay brick will be utilized. Stucco and clay plaster options will be discussed, as will larger heaters capable of heating spaces up to 2,500 sq. ft., and masonry cook stoves. In addition to designing and building, students will learn to fire the heaters to maximize efficiency and will experiment with the student-built masonry oven located on the North House Folk School campus. The materials fee includes a complete resource packet (allowing students to return home prepared to start their own project) and the resources utilized during class for the building process.

The history of masonry heaters can be traced back 1,000 years or more. Beautiful and highly functional, they are built near the heart of a home where their solid and warm presence serves as an ideal gathering point. Design flexibility of masonry heaters enable them to be part of homes of many sizes and incorporate features such as heated benches, baking ovens, or heating domestic hot water.


New! Thu, Jan 26, 2017 - Sun, Jan 29, 2017
(Early bird tuition deadline: 12/15/16)
Thu, Feb 23, 2017 - Sun, Feb 26, 2017 Course Full - Please call for wait list
(Early bird tuition deadline: 01/12/17)

Course Details

Length in days:


$360.00 per student (Regular rate)
$340.00 per student (Early-bird rate)


Beginner to Advanced

Age with adult:

Making it happen:
  • When should I enroll?
  • Do you take last minute registrations?
  • When will new course dates be posted?

You will need the following tools for this class:

  1. Clothing that can get dirty
  2. Eye protection
  3. Ear plugs
  4. 2”x 4” and/or 2”x 8” margin trowel (available at most hardware stores)
Once registered, students will receive a confirmation packet in the mail that may offer additional optional tool recommendations and suggested reading.
Eric Moshier Eric Moshier

Eric is a third generation stone mason who has over 25 years of experience. As the owner of Solid Rock Masonry in Duluth, he has built Finnish, Swedish, Russian and German style masonry heaters throughout the Midwest and southern Ontario. A long-time member of the Masonry Heaters Association, he has led numerous workshops across the Great Lakes Region and at the MHA annual gathering. To compliment his strong desire to educate people about heating with wood in efficient and beautiful ways, Eric has pursued projects ranging from coaching hockey to building log homes to being an environmental consultant. 

More about Eric Moshier
Masonry Heater Building

Masonry Heater Building

Masonry Heater Building