What are the characteristics of built-in barbecues and why are they of high quality? Construction barbecues stand out for their high quality in terms of temperature, rapid heating and heat accumulation. This is due to the numerous qualities of the refractory clay used in its production, which consists of 90% white clay or kaolin and 10% red or russet clay. The process of making these barbecues is slow and is carried out in several stages due to the difficulty of working with refractory clay, which is sandy and does not allow large sections to be lifted. However, this ensures the quality of the products and makes them unique in terms of resistance, firewood consumption, speed and efficiency for roasting and cooking. In addition, barbecues have the ability to maintain heat for a long time thanks to the refractory clay load and heat up in less than half an hour. After roasting meat, fish, pastries, etc., there are enough calories left over to make a stew in the Pereruela clay pot. This is because the clay in the pot and oven maintains the heat and can be left overnight so that the stew is perfect. This slow cooking process gives the stew an exceptional flavor.