We have a concrete patio area with a slight fall so that rainwater does not stand on it. However, a few weeks after cleaning green algae type growth appears and after a few months it requires jet washing again. The patio is in sunlight in the morning but shaded in the afternoon. The algae growth is worse underneath planters etc.
2006-09-04 06:13:10 · 7 answers · asked by Richard C 2 in Home & Garden ➔ Garden & Landscape
Concrete is porous and holds moisture in the pores. Spray it with something to kill the algae and then seal it with a good sealer. this will stop the algae from coming back.
2006-09-04 06:30:49 · answer #1 · answered by oldman 7 · 0⤊ 0⤋
Between pressure washings you can use a bleach water solution of 3 cups ultra (concentrated) bleach to 1 gallon water. Dip your brush in solution and lightly scrub your patio area. Let sit for half an hour and rinse off with hose. I'd use gloves when in contact with the bleach water for safety.
2006-09-04 06:32:37 · answer #2 · answered by biloxibear39530 1 · 0⤊ 0⤋
Go to a Greenhouse supply warehouse store and get Green Shield!, Can't find one? Use Bleach every time you wash the Patio down.
2006-09-04 17:48:43 · answer #3 · answered by bugsie 7 · 0⤊ 0⤋
I tried to clean my patio' on the cheap' using bleach.Didn't work half as good as patio cleaner.
2006-09-04 07:08:59 · answer #4 · answered by Anonymous · 0⤊ 0⤋
Spray the area with bleach when you see green
2006-09-04 06:16:39 · answer #5 · answered by ? 6 · 0⤊ 0⤋
White vinager and a scub brush
2006-09-04 06:18:43 · answer #6 · answered by Anonymous · 0⤊ 0⤋
both first 2 answers are right but better to use vinegar .
2006-09-04 06:27:19 · answer #7 · answered by Anonymous · 0⤊ 0⤋