P-29, r. 1 - Regulation respecting food
5.7.3. The rooms of the processing station must meet the following requirements: (1) the floors, walls and ceilings must be:
(a) covered with a hard material;
(b) smooth, washable and non-porous;
(c) free of indentations, holes and cracks;
(d) not peeling;
(2) the doors must fit and must be made of smooth, waterproof material, and must be kept closed between uses;
(3) windows opening onto the outside must be provided with screens maintained in good condition.