Method and apparatus for manufacturing gypsum products

A method of producing a gypsum product wherein calcined gypsum is mixed with water;

• characterized in that at least two different foam feeds are introduced into the gypsum and water mix simultaneously, the first foam feed comprising a different bubble size distribution when compared to the second foam feed, wherein the first foam feed is generated in a first foam generator using a first foam generation process and the second foam feed is generated in a second foam generator using a second foam generation process, at least one physical parameter of the first foam generation process being controlled independently of the second foam generation process, and wherein a first foam-generating surfactant used in the first foam generation process has the same composition as a second foam-generating surfactant used in the second foam generation process.