Keep Hardscaping Clean and Manicured
From moss to cracks, TOH landscape contractor Roger Cook has your hardscaping answers
This Old House landscape contractor Roger Cook gets to the root of asphalt, brick, and concrete problems.
No herbicides needed—just get those invaders out of the ground. Use a scraper to remove settled dirt in concrete or asphalt. A wet/dry vacuum on reverse or an air compressor will blast away the debris.
Patch driveway or patio surfaces. For brick-path interlopers, clean out unmortared joints with a pressure washer and fill with polymeric sand.
Opt for a cold-pour filler for asphalt; use a textured caulk or a pourable concrete grout on concrete. For all, apply in 1-inch layers and press in with a trowel or screwdriver.
Use a liquid pavement sealer to keep water out. (Note: It will darken the surface's color.)
On most hard surfaces (test first), apply a solution of 1 part bleach to 10 parts water with a spray bottle or a mop and wait 10 minutes. Follow with a stiff brush and a garden-hose sprayer or use a pressure washer to dislodge whatever's left, and rinse.
Moss, mold, and mildew thrive in damp, shady areas. Adjust sprinklers so hardscaping isn't sprayed, and prune trees to permit more direct sunlight.