Insulating Concrete Hearth

[azsjones]

Does anyone know how long you need to let the perlite/portland cement mix for the insulating hearth set up before starting to build the oven on top of it?

[RTflorida]

Re: Insulating Concrete Hearth

I waited 1 week. It takes at least 4-5 days before it feels like it can handle the weight and abuse of climbing around on it to build the dome.

RT

[azsjones]

Re: Insulating Concrete Hearth

Thanks for the info. I'm building the form for the hearth this afternoon after work, going to make the pour tomorrow, then I have next week off. I'm hoping to get a lot done!