Ottawa By-law 2013-416, s. 86 — Property Standards By-law

1) The foundation walls of a vacant building shall be maintained in good repair and structurally sound and shall be maintained by methods including but not limited to shoring of the walls, installing of subsoil drains at the footing, grouting masonry cracks, parging or waterproofing the walls. 2) Every vacant building, unless the slab-on-grade type, shall be supported by foundation walls or piers which extend below the frost line or to solid rock. 3) All footings, foundation walls, piers, slabs-on-grade of a vacant building shall be of masonry or other suitable material. 4) Subsections (2) and (3) shall not apply to accessory buildings where the Building Code specifies that no foundation is required. STRUCTURAL SOUNDNESS