True Fireplace by Heat & Glo in a living room

Which Stove Material is Right For You: Cast Iron, Steel, or Soapstone?

Written by: Brett Bengtson

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Published on

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Time to read 4 min

A fireplace is more than just a source of warmth; it’s a centerpiece of your home, adding ambiance, charm, and comfort. When choosing a fireplace or wood stove, the material it’s made from is crucial for both aesthetics and functionality. Cast iron, steel, and soapstone are three of the most popular materials, each offering unique benefits and drawbacks. In this blog, we’ll explore the pros and cons of each to help you make the best choice for your home.

Cast Iron Fireplaces

Cast iron has been a traditional choice for fireplaces and wood stoves for centuries. Known for its durability and timeless appeal, it’s often associated with ornate designs and classic aesthetics.

PROS

  • Exceptional Heat Retention: Cast iron absorbs heat slowly and radiates it evenly over time, making it ideal for long-lasting warmth even after the fire has burned out.
  • Durability: Cast iron is incredibly strong and resistant to warping under high temperatures, ensuring your fireplace or stove will last for decades.
  • Classic Look: Cast iron fireplaces often feature intricate detailing and vintage-inspired designs, making them a beautiful addition to traditional or rustic interiors.
  • Versatility: Suitable for wood-burning, gas, or even electric fireplaces.

CONS

  • Weight: Cast iron is heavy, which can make installation more challenging and may require reinforced flooring.
  • Maintenance: Over time, cast iron can develop rust if not properly maintained. Regular cleaning and occasional recoating with heat-resistant paint are necessary.
  • Cost: High-quality cast iron fireplaces can be expensive due to their durability and craftsmanship.

A Cast Iron Wood Stove That Boasts a High Efficiency Rate


The Green Mountain 40 is an efficient contemporary cast iron wood stove. A mixture of tried and true meets cutting edge in our new Tru-Hybrid combustion system. This technology provides an ultra clean burn with efficiencies over 80% while providing previously impossible burn times. The Green Mountain series has a large viewing window which affords an impressive view, and a cast iron body that incorporates more contemporary styling cues to fit in virtually any home.



BTU Up to 40,000 Output
Width 23-3/5 in.
Height 30-3/5 in.
Depth 16-3/5 in.
Weight 464 lbs.
Material Cast Iron
Heating Capacity Up to 1,400 sq ft.
Burn Time  16 hrs.
Efficiency 77%
EPA Certified Yes

Check out the Green Mountain 40 Wood Stove here: 

Green Mountain 40 Wood Stove

Kozy Heat Fireplace in living room

Steel Fireplaces

Steel is a modern material that’s increasingly popular for fireplaces and stoves. Its sleek, contemporary design makes it a favorite for minimalist and industrial-style homes.

PROS

  • Quick Heating: Steel fireplaces heat up rapidly, making them ideal for immediate warmth when you light a fire.
  • Lightweight: Compared to cast iron, steel is lighter, which simplifies installation and may reduce structural requirements.
  • Modern Aesthetic: Steel fireplaces often feature clean lines and minimalist designs, perfectly suited to modern homes.
  • Cost-Effective: Steel tends to be less expensive than cast iron, offering a budget-friendly option without sacrificing functionality.

CONS

  • Poor Heat Retention: Steel doesn’t retain heat as well as cast iron, so the warmth dissipates quickly once the fire goes out.
  • Prone to Warping: Prolonged exposure to very high temperatures can cause steel to warp, especially if it’s thinner or lower quality.
  • Less Durability: While durable, steel fireplaces may not last as long as cast iron counterparts, especially under heavy use.

A Steel Fireplace That Has Received Unlimited Praise


Certified as having 68.99% efficiency for natural gas and 69.12% for LP gas, the Lakefield XL offers impressive performance. Rated at 40,00 BTU/hr input for natural gas and 39,000 BTU/hr LP gas, this is a free standing gas fireplace that benefits from both excellent performance and eye-catching good looks. Fronted by traditional glass, this gas fireplace includes a limited lifetime warranty and offers exceptional value.



BTU Up to 22,000 - 40,000 Output
Width 30-13/16 in.
Height 32 in.
Depth 20-11/16 in.
Weight 207 lbs.
Material Steel
Viewing Area 22 (W) x 16 (H) in.
Efficiency 72.2%

Check out the Lakefield XL Gas Stove by Kozy Heat here: 

Lakefield XL Gas Stove

Kozy Heat Fireplace in living room

Soapstone Fireplaces

Soapstone is a natural material known for its beautiful, smooth texture and unique heat-retaining properties. It’s often used in high-end fireplaces and wood stoves for its luxurious look and functionality.

PROS

  • Superior Heat Retention: Soapstone absorbs heat slowly but retains it for much longer than both cast iron and steel. This makes it perfect for homes in colder climates or those seeking efficient, long-lasting warmth.
  • Even Heat Distribution: Unlike metal, soapstone doesn’t create hot spots, providing consistent warmth throughout the room.
  • Unique Aesthetic: Soapstone’s natural patterns and colors add an elegant, organic touch to any home decor.
  • Low Maintenance: Soapstone is resistant to stains, scratches, and corrosion, requiring minimal upkeep over the years.

CONS

  • High Cost: Soapstone fireplaces are among the most expensive options due to the rarity and quality of the material.
  • Heavy: Soapstone is extremely heavy, often even more so than cast iron, which can make installation challenging and costly.
  • Slow to Heat Up: While it retains heat exceptionally well, it takes longer to warm up initially compared to steel or cast iron.


A Soapstone/Cast Iron Model That We Love


The Mansfield is a true workhorse. With Relaxed good looks that will deliver lasting whole-house warmth. The Mansfield is a top-seller among Leisure Time hearth professionals. Enjoy up to 14 hours of sustained heat on a single load of wood.



BTU Up to 80,000 Output
Width 27 in.
Height 31-3/5 in.
Depth 24 in.
Weight 555 lbs.
Heating Capacity
Up to 2,500 sq ft.
Burn Time 10 hrs.
Efficiency 67%
Firebox Capacity 3.2 cu ft.
EPA Certified Yes

Check out the Mansfield by HearthStone here:

Mansfield Wood Stove by Heartstone Stoves

HearthStone Fireplace in living room

Let's Keep This in Mind

compatibility with fuel types

The type of fuel (wood, gas, or other) is primarily determined by the stove’s design and functionality, not the material. For example:

  • Wood-burning Stoves: Typically come in all materials (cast iron, steel, or soapstone), as long as they are designed with proper combustion chambers and ventilation.
  • Gas Stoves: These are often made from steel or cast iron for durability but include specific components like burners and gas line hookups.
  • Electric Fireplaces: Usually prioritize aesthetics and may use lightweight steel or composite materials over heavy cast iron or soapstone.

The stove’s material won’t restrict what fuel it can use, but it may impact performance or efficiency.

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