Is quartz heatproof? Can you put hot pans on quartz?
No. Quartz is heat resistant, not heatproof. The resin that binds it starts to suffer somewhere around 150 degrees, and a pan straight off a hob is well past that. The mark it leaves is permanent and cannot be polished out in place.
Why quartz has a heat limit at all
Engineered quartz is roughly ninety per cent crushed natural stone and around seven to ten per cent polymer resin. The stone does not care about heat. The resin does. Above roughly 150 degrees it can discolour, and a sharp change in temperature on one spot can also cause a hairline crack, because the surface expands where it is hot and not where it is cool. Both failures come from the binder, not the stone.
| Item | Rough temperature | Verdict |
|---|---|---|
| Mug of tea | 85°C | Fine |
| Dish straight from a dishwasher | 70°C | Fine |
| Slow cooker base, left running | 95°C | Fine, but move it occasionally |
| Oven tray straight from the oven | 180°C to 220°C | Use a trivet |
| Pan straight off a gas ring | 200°C to 250°C | Use a trivet, this is the one that marks |
| Cast iron off a high flame | 250°C plus | Never directly |
What damage looks like, and whether it can be fixed
A scorch shows as a dull, slightly yellowed or whitened patch where the resin has changed. It does not wipe off, because nothing has been deposited, the material itself has altered. A thermal crack is a fine line, usually starting at a cut-out corner where the stone is already narrowest.
Neither is repairable in place in a way you would be happy with. A specialist can sometimes improve a light mark, but the honest answer is that replacing the affected piece is the real fix, which is why prevention matters more here than with most materials.
The habits that make it a non-issue
Keep a trivet by the hob rather than in a drawer, because a trivet you have to fetch is a trivet you will not use. Do not stand a slow cooker or an air fryer in the same spot permanently. Give the area around a cut-out extra care, since that is where the stone is narrowest. And if you have a hob with a downdraft or a very tight sink to hob run, mention it when we template, because we can sometimes plan the joint to keep the narrowest stone away from the heat.
If this rules quartz out for you
It rules it out for some people, and that is fine. Granite takes a hot pan without complaint. Porcelain takes one and does not even warm up much, because there is no resin in it at all. A very practical answer that we fit often is porcelain on the hob run and the island with quartz elsewhere, matched so it reads as one kitchen.