The Ultimate Guide to Hearths & Surrounds

Hot Box ® How-To

The hearth is a safety essential and a design anchor. Here’s how to choose materials, size it correctly, respect clearances, and match surround styles—then get it installed right. Reference the full hearth guide, shop hearths and surrounds, and book HETAS installation.

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The Role of the Hearth

The hearth is the non-combustible base beneath your fire, stove or insert, protecting floors from heat/embers and providing a stable platform. It’s mandatory for solid fuel appliances under UK regs.

Material Choices

Read more in our Ultimate Hearth Guide.

Sizing & Clearances

• Thickness: Some appliances allow 12mm; open fires typically 50mm+ (check the manual).
• Projection: Minimum 150mm in front and 150mm each side of the opening/door.
• Combustibles: Respect manufacturer distances—especially under wooden mantels.
• Edges: Pencil-round/chamfer to reduce chipping.

Surround Styles

Shop fireplace surrounds to match your hearth choice.

Installation & Compliance

Meet Building Regulations Part J with HETAS-approved installers for correct clearances and a flawless finish.

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FAQs

Do I have to have a hearth?

Yes—for any solid fuel appliance in the UK, a compliant hearth is mandatory to protect against heat and sparks.

Can I put a wooden mantel above my stove?

Yes, but only if it meets the clearance distances specified by the stove manufacturer and UK regulations.

What’s the most durable hearth material?

Granite and slate are among the most durable and low-maintenance options.

How do I keep my hearth looking good?

Use Hot Box ® Firestarter to minimise soot and ash, and clean surfaces with approved products.