Heat Resistant Tiles for Fireplaces

“Heat resistant” gets used loosely in tile marketing. It is worth knowing what it actually means, because the wrong tile in the wrong place will craze badly, crack, or lift away from the wall, and by then the fireplace is already built.

The short answer: for most domestic fireplaces the tile itself is rarely the weak point. Fired ceramic and porcelain have already been through a kiln at temperatures far higher than a domestic fire will ever reach. What fails is usually the adhesive, the glaze under repeated heat cycling, or the tile being used somewhere it was never intended for.

The three positions, and what each needs

Most confusion comes from treating a fireplace as one surface. It is three, and they get very different amounts of heat.

1. The hearth. Directly in front of the fire, taking radiated heat, dropped embers and foot traffic. The hardest working surface. Unglazed quarry tiles are the traditional and usually the best answer, particularly for an open fire or stove in regular use. More on hearth tiles.

2. The fireplace opening. The part immediately bordering the fire, and the hottest position of the three. Fireplace blocks and opening tiles are made thicker and stronger than ordinary fireplace tiles precisely because they have to withstand the direct heat of the fire. Do not use a standard wall tile here. See our opening tiles.

3. The surround and chimney breast. Vertical surfaces set back from the fire, taking radiated heat but no direct contact. This is where decorative glazed tiles and tube lined panels belong, and where the traditional Victorian and Edwardian tile sets were used.

What our tiles are made to

Our glazed ceramic tiles are manufactured to BS 6431. Our quarry tiles are porcelain bodied with an extremely durable surface, and are the tiles we would put on a working hearth ourselves.

We are also straightforward about the limits. Glazed tiles are not guaranteed against crazing, which is fine cracking that develops in the glaze over time. It does not affect how the tile performs, because the cracks are in the glaze and not the body, and on a period fireplace it is generally considered desirable. But it is worth knowing before you order rather than after. More on crazing, and which glaze colours resist it.

The adhesive matters more than the tile

This is the part people get wrong most often, and it is the most common reason a properly chosen tile still fails.

Standard wall and floor tile adhesive is not formulated for the repeated heating and cooling of a fireplace. It loses its grip, and tiles begin to lift, often after the first winter and sometimes taking the face of the tile with them. Plenty of adhesives sold as “flexible” are not heat resistant, so check the tub states a temperature rating.

We supply Vitcas heat resistant tile adhesive rated to 1000°C, which is well beyond what a domestic fireplace will reach.

Wood burning stoves

Stove installations have become the most common reason people come to us for hearth tiles. A stove concentrates heat differently to an open fire, and the hearth is usually more visible because there is no fender hiding it.

Unglazed quarry tiles are the usual recommendation: no glaze to craze, extremely durable, and they suit both period and contemporary stoves. Hearth dimensions and clearances for a solid fuel appliance are covered by Approved Document J in England, with separate requirements in Scotland, Wales and Northern Ireland. Check the current guidance or ask your HETAS installer before finalising sizes.

Frequently asked questions

Are ceramic tiles heat resistant?
Fired ceramic has already been through a kiln well above the temperature a domestic fire reaches, so the tile body itself is rarely the problem. What matters is using the right tile in the right position, and fixing it with a heat resistant adhesive.

Can I use bathroom or kitchen tiles on a fireplace?
We would not. They are not made for the position, they are usually thinner than fireplace tiles, and standard adhesive will fail regardless. We do not sell bathroom or kitchen tiles, and fireplaces are all we make.

What temperature do fireplace tiles need to withstand?
Rather than a single number, think about position. The opening takes direct heat and needs thicker fireplace blocks. The hearth takes radiated heat and embers. The surround takes far less. Our adhesive is rated to 1000°C, comfortably beyond a domestic fireplace.

Are glazed tiles suitable for a wood burner?
They can be used on the surround. For the hearth of a stove in regular use we would recommend unglazed quarry tiles.

Will heat resistant tiles crack?
The tile body should not. The glaze may craze over time, which is normal and does not affect performance. Cracking through the body usually points to the wrong tile for the position, movement in the substrate, or unsuitable adhesive.

Ask us before you order

Tell us what you are fitting and where, and we will tell you what to use. Send a photograph and the measurements to sales@c20fireplaces.co.uk or call 0161 429 9042. Free colour samples are available. We would rather talk you into the right tile than sell you the wrong one.