Hamilton – GJ MacRae Foundation Repair

Bench Pinning Foundation Reinforcement (Hamilton)

gjmacrae — Fri, 14 Jun 2024 04:01:44 +0000

On interior of basement, prepare perimeter of repair area and remove all debris to clear access. Begin bench pinning sections around proposed interior foundation walls. Install angle of repose to engineered specifications and install vertical rebar (bent at a 90 degree) into existing footing/foundation walls as well as vertical rebar inserted into unexcavated ground at base of bench pin (leaving the underside of existing footing undisturbed in benching area). Install multiple levels of horizontal rebar into bench pins and tie into vertical rebar creating a mesh pattern. Once complete, form with timber and install 25 mPa concrete into forms. Vibrate with needle vibrator to ensure complete encapsulation of form. Once cured, remove forms. Repeat process until complete.

Remove and dump all debris. All labour and materials included.

Block Foundation Reinforcement with Bond Beam (Hamilton)

gjmacrae — Fri, 14 Jun 2024 03:47:09 +0000

Install inside shoring and pour fresh concrete footing.

Once footing is cured, rebuild foundation walls with 10” block from base of footing to underside of existing joistwork. Once complete, install top bond beam with horizontal rebar.

Remove interior shoring and remove and dump all debris.

Cutting a Doorway Through a Foundation Wall (Hamilton)

gjmacrae — Fri, 14 Jun 2024 03:37:04 +0000

Remove all obstructions and materials in way of project area. Mark proposed doorway opening through foundation wall with marker and prepare worksite for cut.

Saw cut foundation wall to the proposed dimension with concrete wet saw. Once wall cutouts are complete, prepare joist support. Install horizontal timber beam across open joists and fasten.

Install telescopic jackposts on either side of proposed timber beam and secure both posts to existing concrete benchpin.

Secure telescopic jack posts to timber beam and lift joists off concrete wall within the proposed doorway opening area. Once timber beam and jack posts are secure remove portion of existing foundation sill plate and foundation wall with chipping hammer and dispose concrete into bin on driveway.

Once proposed rough opening through foundation wall is clear, frame in door with handle and seal edges of frame with foam.

Remove and dump all debris. All labour and materials included.

Crumbling Foundation Wall Replacement with Shoring (Hamilton)

gjmacrae — Fri, 14 Jun 2024 02:52:03 +0000

Once footing is cured, rebuild foundation walls with 10” block from base of footing to underside of existing joistwork. Once complete, parge fresh foundation walls and let cure. Once cured, prime foundation wall and apply hydroshield ruberized membrane waterproofing.

Fasten drainage board from grade to footing. Backfill and power tamp soil within repair area and reinstall patio slabs. Remove interior shoring and remove and dump all debris. All labour and materials included.

Carbon Fiber Foundation Reinforcement with Underpinning (Hamilton)

gjmacrae — Fri, 14 Jun 2024 02:35:28 +0000

Break open concrete floor and expose footing in proposed carbon fiber reinforcement installation areas. Remove all debris from concrete foundation wall and clean thoroughly. Expose sill plate/joist work and prepare for hardware mounting. Drill 1″ hole in concrete footing and clean debris from hole.

Generously cover concrete wall with resin and install carbon fiber strips directly to foundation wall. Run carbon fiber overtop of exposed footing and curl base of strip into proposed underpinning. Fasten top of carbon fiber into sillplate/joistwork and tighten hardware.

Excavate underpin by hand and clean underside of footing with wire brush. Apply masonry adhesive to underside of footing. Once underpin is carved and prepared, build and install timber forms to accommodate a positive concrete adhesion to the underside of existing footings (non-grout, overflow method) allowing for a void-less encapsulation of existing structure to fresh underpin.

Fill forms with 25 MPa concrete until full and install needle vibrator and fill exterior blockwork with slurry grout.

Once cured, remove timber forms and fasten drainage board to foundation wall using concrete anchors. Install a fresh 4″ perforated weeping tile system with filter cloth.

Connect fresh weeping tile system into existing drain works. Cover weeping tile with 3/4″ gravel and reinstall concrete floor.

Remove and dump all debris. All labour and materials included.

Foundation Wall Rebuild with Shoring (Hamilton)

gjmacrae — Fri, 14 Jun 2024 01:47:59 +0000

Excavate exterior walls by hand and install telescopic shoring to interior of joist work. Once structure is secured, excavate by hand to frost depth and remove existing foundation walls within repair area. Repair any damaged wooden joist work with fresh sistered timber and pour fresh concrete footing at frost depth to a dimension 20” x 8“ with rear. Once footing is cured, rebuild foundation walls with 10” block from base of footing to underside of existing joist work. Once complete, parge fresh foundation walls and let cure. Once cured, prime foundation wall and apply rubberized membrane waterproofing. Fasten drainage board from grade to footing. Backfill and power tamp soil within repair area and reinstall patio slabs.

Remove interior shoring and remove and dump all debris. All labour and materials included.

Foundation Wall Replacement in High Park (Toronto)

gjmacrae — Fri, 14 Jun 2024 01:19:02 +0000

Excavate exterior walls by hand and install telescopic shoring to interior of basement. Once structure is secured, excavate by hand to frost depth and remove existing foundation walls within repair area. Repair any damaged wooden joist work with fresh sistered timber and pour fresh concrete footing at frost depth to a dimension 20” x 8“. Once footing is cured, rebuild foundation walls with 10” block from base of footing to underside of existing joist work. Once complete, parge fresh foundation walls and let cure. Once cured, prime foundation wall and apply rubberized membrane waterproofing. Fasten drainage board from grade to footing. Backfill and power tamp soil within repair area and reinstall patio slabs.

Remove interior shoring and remove and dump all debris. All labour and materials included.

Bench Pinning Underpinning with HSS Posts (Hamilton)

gjmacrae — Fri, 14 Jun 2024 01:02:26 +0000

On inside of basement, prepare perimeter of repair area and remove all debris to clear access. Begin bench pinning sections around proposed interior foundation walls. Install angle of repose to engineered specifications and install vertical rebar (bent at a 90 degree) into existing footing/foundation walls as well as vertical rebar inserted into unexcavated ground at base of bench pin (leaving the underside of existing footing undisturbed in benching area).

Install multiple levels of horizontal rebar into bench pins and tie into vertical rebar creating a mesh pattern. Once complete, form with timber and install 25 mPa concrete into forms. Vibrate with needle vibrator to ensure complete encapsulation of form. Once cured, remove forms. Repeat process until complete.

Once perimeter is complete begin excavations by hand and install HSS posts into concrete footings.

Inside Basement Waterproofing with Sump Pump (Hamilton)

gjmacrae — Wed, 12 Jun 2024 17:04:39 +0000

On interior, remove all loose obstructions in way of repair areas. Break concrete 18″ back from foundation walls around the complete perimeter of repair area. Dig down to footings and remove debris.

Drill 1/2″ holes in cavities of blockwork and fasten drainage board to foundation wall using concrete anchors. Install a fresh 4″ perforated weeping tile system with filter cloth. Break open existing concrete floor and excavate sump basin at a dimension of approximately 2.5ft x 2.5ft x 3ft. Line perimeter of basin with filter cloth and drill 1/2” holes around complete perimeter of basin. Install basin and surround with 3/4“ clear gravel.

Install a 1/3hp oil cooled sump pump and connect pump exhaust line. Connect fresh weeping tile system to sump basin. Reinstall concrete floor. Remove and dump all debris. All labour and materials are included.

Inside and Outside Basement Waterproofing (Hamilton)

gjmacrae — Wed, 12 Jun 2024 16:44:06 +0000

Remove all debris and obstructions in way of repair areas. Lay down tarps and dig down to footing by hand in specified repair areas.

Repair all cracks and masonry voids in foundation wall below grade. Prime wall and apply hydroshield rubberized membrane to repair area. Add a layer of mastic mesh, another layer of rubberized membrane, a layer of 12m plastic and fasten drainage board to grade with termination straps and concrete anchors. Backfill and power tamp dirt. On interior, remove all loose obstructions in way of repair areas. Break concrete 18″ back from foundation walls around the complete perimeter of repair area. Dig down to footings and remove debris.

Drill 1/2″ holes in cavities of blockwork (if applicable) and fasten drainage board to foundation wall using concrete anchors. Install a fresh 4″ perforated weeping tile system with filtercloth. Break open existing concrete floor and excavate sump basin at a dimension of approximately 2.5ft x 2.5ft x 3ft. Line perimeter of basin with filtercloth and drill 1/2” holes around complete perimeter of basin. Install basin and surround with 3/4“ clear gravel.