Retaining Wall Project in Toronto MidTown
The existing wall between the neighbouring properties was a hodgepodge of natural stone, pieces of concrete and cement, reinforced with olde pieces of pipe and wood. The difference in elevation ranged from 4 feet to 10 feet along the length of the 60 feet of wall.
The concern of the neighbours was the erosion and integrity of the existing structure. The homeowner on the high side of the wall was worried about damage to the existing forsythia hedge, while the lady on the low side of the wall was afraid her garden would get trampled during the rebuilding of the wall. Care had to be taken to ensure that the issues expressed by the adjacent property owners were addressed.
The slope of the property dictated that the wall was to be higher at the bottom of the garden, and was to step up with the incline of the land.
As the homes were built close together, sharing single driveways, there was no access for equipment, so the existing wall had to be demolished carefully and removed by hand. The old wall stones were taken away by wheelbarrow and all new materials had to be delivered by wheelbarrow and placed by hand.
The base gravel and all backfill were also brought in and installed manually. Drainage pipe and filter fabric were required behind the wall, and geo-grid mesh was placed every 2 feet of wall height to ensure tieback strength throughout the length of the structure.
The block used is an Oaks Precast product – Hewnstone – a hollow block with a smooth decorative face. The fibreglass (yellow) pins ensure further locking of the blocks. The strength of the wall and drainage is increased by filling the hollow space with clear gravel.