We build interlocking block walls, set heavy armor stones, and fix leaning retaining structures. GTA Masonry serves homeowners across Stoney Creek, Hamilton, and nearby areas.
A retaining wall holds back soil on a sloped yard. It turns a steep, muddy hillside into a flat, usable space. It also stops soil from sliding onto your driveway or patio during a heavy rain. In Stoney Creek, clay soil absorbs a lot of water. This wet, heavy clay pushes hard against walls that are not built with proper drainage or a deep footing. GTA Masonry digs foundation trenches, compacts gravel bases, and lays interlocking concrete blocks or heavy quarry stones. We serve homeowners in Stoney Creek, Old Town, Stoney Creek Mountain, Winona, and Fruitland. Our work keeps your yard level and your soil in place through every season.
A retaining wall carries the weight of wet soil every day. Building one correctly takes structural knowledge and specific equipment. Here is what GTA Masonry does that makes our walls last.
Many homeowners set blocks on top of flat soil. The wall looks fine at first, then tips forward after the first winter. We dig a trench and bury the first block course below grade. Next, we compact clean gravel under the blocks so they sit on a solid, level base.
A wall that stands perfectly vertical has no resistance against soil pushing from behind. We lean each course of blocks slightly backward into the hill. This angle is called a batter. Also, this tilt uses the weight of the blocks to fight the soil load naturally.
Blocks alone cannot hold back a tall, heavy bank of wet clay soil. For walls taller than three feet, we unroll geogrid sheets between the block courses. Next, we stretch the grid back into the hill and compact soil over it. This anchors the wall face to the hill directly.
Water is the main reason retaining walls fail. Rain soaks into the soil, makes it heavy, and then pushes the blocks forward. We lay a perforated weeping tile pipe directly behind the first block row. Also, we fill the space with clean gravel so water drains fast through the wall.
We build decorative garden walls and heavy structural earth retention systems for homes across Stoney Creek and Hamilton. Here are the specific wall projects we do.
These walls use split-face concrete blocks or smooth-face precast blocks with built-in key lips on the bottom face. The lips lock the next course into a fixed position without mortar. This means the wall can flex slightly during freeze-thaw cycles. Also, individual blocks can be removed and replaced without rebuilding the entire wall. We use blocks from brands like Unilock, Permacon, and Allan Block to match your landscaping style.
Armor stones are large, irregular-cut quarry stones that weigh 500 to 3,000 pounds each. We handle limestone slabs, sandstone blocks, and granite fieldstone from local quarries. We set these stones using a skid steer or excavating machine with rigging chains. Next, the stones form a gravity wall that holds back steep banks through weight alone. This style suits escarpment edge yards, wide driveways, and rural properties.
A wall is only half the job. The drainage layer behind it is equally important. We wrap the excavated space in non-woven geotextile filter fabric and fill it with 3/4-inch clear crush gravel. Also, we connect a perforated corrugated drain pipe with a cleanout end cap at the wall base. This lets rainwater drain fast and prevents hydrostatic pressure from building behind the block face.
We use industrial HDPE uniaxial geogrid mesh on walls that must hold back large soil volumes. We unroll the grid behind the block face at set embedment depths and bury it under compacted granular backfill. Next, this links the block face panel to the soil mass behind it. Also, the wall and the fill become a single reinforced unit that resists outward sliding far better than block weight alone.
When a wall tips forward, the only reliable fix is to take it down and rebuild from the base. We remove and inventory each concrete block or armor stone. We check every block for face spalling, corner chips, and structural cracking. Also, we dig out the failed crushed stone footing, recompact a fresh base, and rebuild the wall at the correct batter angle with a new weeping tile drain.
We finish the top of a modular wall with flat cap stones bonded with exterior masonry adhesive. The cap seals the top course joints from rain and gives the wall a clean finished edge. Next, we build matching stair tread blocks with a nosing overhang into the slope. Also, we set each riser block level and bond the step cap securely for safe footing.
Short block borders keep topsoil and mulch inside the garden and off the lawn. We set two or three courses of garden edging blocks and lay a root barrier fabric behind them. Also, we leave a small drainage gap at the base so excess water does not pool inside the planting bed. This makes lawn edging and bed maintenance much faster.
Precast concrete blocks scale and stain over time from moisture cycling and efflorescence salt deposits. We clean the block face with an acid-free efflorescence remover and a stiff brush. Next, we apply a penetrating siloxane sealer to the dry block surface. This repels water from the outside while letting vapor escape from the soil side. Also, we reapply every five to seven years to maintain protection.
Here is exactly what happens from the time we arrive to the time we clean up and leave.
We measure the height of the slope and calculate the soil pressure the wall must handle. Also, we call Ontario One Call to mark any buried gas lines, water pipes, or electrical conduits before we dig.
We dig a foundation trench along the wall line. The trench must be deep enough to bury the first row of blocks completely. Also, the width must give us room to place the drainage pipe behind the block.
We fill the trench with crushed stone and compact it with a gas plate compactor. Next, we check the surface with a builder’s level to confirm the base is flat side to side.
We set the first row of blocks into the gravel trench. This row is the foundation of the entire wall. We level every block individually from side to side and front to back before moving up.
We stack each course with a slight backward offset to maintain the batter angle. Also, we check the wall face with a batter board every three courses to confirm the lean is consistent.
We lay the perforated drainage pipe along the base course behind the wall. We fill the cavity with clean gravel. Next, on walls over three feet tall, we lay geogrid sheets between courses at set height intervals.
We apply outdoor masonry adhesive to the top block course and press the flat cap stones into place. We grade the soil behind the cap away from the wall. Also, we sweep stone dust off your driveway and walkways before we leave.
We build and repair retaining walls for homeowners and property owners throughout Stoney Creek and the broader Hamilton region. Our masonry crews work in all of the following neighborhoods.
Call us to confirm coverage for your address.
An interlocking block has molded keys or lips on the top and bottom faces. These keys lock the next course of blocks in a set position without mortar or glue. A solid block wall uses mortar between every joint, which is rigid and cracks when the ground freezes. Interlocking walls flex slightly and hold up better to frost.
The first course of blocks should sit below the final grade by at least six inches. The gravel under the blocks should add another four to six inches. So the full trench depth is typically 10 to 14 inches. Shallow bases are the most common reason retaining walls tip forward.
No permit is needed for walls under one metre (3.3 feet) in height. Walls taller than one metre next to a road, driveway, or neighbouring property need a permit and engineering drawings from the City of Hamilton. GTA Masonry checks the height and setback rules and handles the permit paperwork.
Leaning happens when water gets trapped in the soil behind the wall. Saturated clay is heavier than dry clay. When it freezes in winter, it expands and pushes the blocks forward. Also, if the footing is too shallow or the gravel base is not compacted, the blocks sink unevenly and tilt.
Yes, most of the time. If the old blocks are not cracked or crumbled, we remove them carefully and stack them to the side. Next, we dig out and recompact the footing trench and reset the blocks with the correct angle and drainage. This avoids the cost of buying new materials.
Geogrid is a plastic mesh sheet that is laid between block rows and buried in the backfill soil. It ties the wall face back into the soil mass so the wall acts as a unit instead of a row of individual blocks. We use it on walls taller than three feet or on walls holding back steep, heavy clay banks.
We lay a layer of filter fabric behind the block face before backfilling. This stops small soil particles from washing through the joints. Also, spraying a non-toxic horticultural vinegar into the open joints kills weed roots in the gravel without damaging the concrete blocks.
A well-built interlocking concrete block wall lasts 30 to 50 years. The blocks are manufactured to handle frost and wet conditions. Also, keeping the weep holes and drainage gravel clear of leaves and silt extends the life of the wall. A sealer spray every five to seven years protects the block face.
A leaning or shifted retaining wall gets worse with every downpour. Saturated soil is heavy and never stops pushing. Contact GTA Masonry today and book a free yard inspection. We will measure the slope, check the drainage, and give you a clear written plan.
