Where can I find Building materials in Marl?

Building materials can also be found in these cities:

Bochum Bottrop Castrop-Rauxel Datteln Dorsten Dortmund Gelsenkirchen Gladbeck Haltern am See Herne Herten Oberhausen Obertaufkirchen Raesfeld Recklinghausen Schermbeck Waltrop

You can also find this in Marl:

Baking Soda Food For Allergy Sufferers Espresso Ground Pastries Vitamins And Minerals Infusion Bag Dried Fruit Curling Irons Toothpaste Absorbent Cotton