Existing crawlspace area
Partial excavation of crawl space
Lifting the Chimney
Project Engineer: D.C. Dechka Consulting Engineers Ltd.
Designers: Jim Keay and Dave Spaans
Installing Contractor: Basement Systems Calgary
Products Installed: PWF walls, Central Beam, Basement Floor, Draintile System, SuperSump, Rubber Membrane, 3 Helical Piers
The Fretwell’s desire was to turn their unusable basement and crawlspace into a functioning living area that would double the square footage of their current home. It was important that the basement be a livable space with a very open design, with as few supports as possible to fit into the finishing plans they had.
Over the years settlement has taken its toll creating breaks within the 8” concrete walls. This combined with improper underpinning of some wall sections created a situation which required the removal of the existing foundation walls.
The original basement had never been completely excavated which resulted in a futher challenge of removing 90 cubic meters of soil while attempting to keep the home habital. The final challenge dealt with leveling the home. If the home were leveled the chimney had to be raised without damaging the beautiful stone surface.
The first step required the excavation and removal of all excess concrete and soils to allow for a full size basement complete with 8’ walls. The bulk of this excavation had to be performed by hand.
Step two consisted of removing sections of the concrete walls after which new footing pads were formed and poured. Once this was complete new preserved wood foundation (PWF) walls were installed on the freshly cured footing pads.
Once the home was leveled the chimney was supported and lifted via the installation of three helical piers. The old wooden beams were removed and two new beams were installed providing clear 20 foot spans of livable space.
The Fretwell’s now have double the living space they had before. The basement is a very open fully functional space that they already have plans to finish. By installing the central beams only one support was required instead of the five that were originally there.
The house has been lifted in required areas to ensure that it is level. The chimney remains supported and all of the foundation challenges in the home at the start of the project have been repaired.
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Foundation Repair Products & Services
Foundation Wall Crack Repair
Bowing Wall Repair
Structural Settlement & Sinking Repair
Foundation Heaving Fixes
Collapsing Retaining Wall Prevention
Sinking Outdoor Concrete Repair
Street Creep Repair
Helical Deck Piers
Crawl Space Supports
Foundation Slab Piers
Foundation Channel Anchor System
Foundation Problem Symptoms
Sagging Crawl Space
Sticking Doors & Windows