When water falls on solid paver, it goes directly into the drain and sewers then flows into rivers, streams and channels. In some cases, water from heavy rainfalls picks up heavy sedimentations and other pollutants such as chemicals and oils. Innovations such as permeable and porous paver can help lessen water pollution by directing the water down to the soil. Choose paving materials that allow grass to grow through and help filter water so that fewer pollutants go down the drain.
Heavy-duty plastic grass
Use grass pavers made of heavy-duty plastic and of honeycomb or hexagonal structure that allow grass to grow through. Use them for your pavements, driveways or lawn. The modular system consists of rectangular pavers that, when laid down across the grass area, can support foot and vehicular traffic.
Each paver has a honeycomb cell grid, which has a 2.5 cm (1 inch) thick wall and has a base plate that extends past the edge of the grid on both sides, allowing overlapping during assembly. Securing the pavers together with construction staples will keep them lined up evenly. Anchoring spikes secure the grass pavers into the soil. The cell grids create apertures where you can plant the grass.
Add 2.5 to 5 cm (1 to 2 inches) of soil over the base made of gravel and sand before placing each plastic grass paver. Once installed, fill the honeycomb cell grid with soil before planting the grass. The grass paver will prevent soil compaction during heavy foot or vehicular traffic. You can buy heavy-duty plastic grass pavers from garden, home improvement and building supply centres near you.
Made of dense concrete, interlocking pavers also come in permeable styles. Each paver interlocks to add stability and has holes that allow plants to grow. Concrete pavers weigh more than the plastic grass pavers do. Their heavy weight makes them more difficult to handle than plastic pavers; however, they offer more durability. The interlocking joints allow for small amounts of movement without cracking.
Interlocking concrete pavers have tight dimensions that tolerate heavy loads, making them more durable than asphalts. The segments that interlocking concrete pavers create allow for expansion and contractions without causing cracks. Interlocking concrete pavers cost more than plastic grass pavers; however, they last longer too.
Laying interlocking concrete pavers on a prepared bedding layer over a subbase made of sand and gravel will make them more stable. Place soil before planting grass inside the holes. For a creative look, try alternating grass and mulch into each hole.
Laying down solid concrete blocks or bricks in patterns that create voids or spaces in between each other will allow grass to grow through. For example, creating a hopsack pattern will create "pockets" in your finished pavement. You'll achieve the same result when you lay down the rectangular solid concrete blocks in herringbone, diamond or square patterns. Before laying down the pavers, make sure that you have a solid base made of compacted mixture of sand, soil and gravel, at least 15 to 20 cm (6 to 8 inches) deep. Then, after laying down the pavers, plant the grass seeds in the spaces.
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