smiles_ami
it is outside, it's rain & mildew stains. What solution would do the trick?
Answer
Since outside concrete stain is a mixture of mildew and dirt you need something for both.
You might try this formula recommended by the Louisiana Dept of Agriculture.
Per Gallon of Water
1/2 cup chlorine bleach
1/3 cup low suds detergent , such as clothes washing detergent
1/3 cup of TSP
Apply with broom or brush over the ares and let sit for 1 hour: then hose off using a strong hose nozzle. This should remove most of the problem. You can repeat.if needed.
NOTE: If possible use industrial (heavy duty)bleach (from Home Depot, Lowe's etc)
TSP(tri sodium phosphate) is hard to find since many phosphate cleaners are no
longer available."TSP Cleaner"(no phosphate) is is not the same as TSP..
The authentic TSP leaves a residue that inhibits mildew re growth. The best place
to look for TSP is at your neighborhood hardware store or maybe on the internet
or a cleaning supply outlet.
Since outside concrete stain is a mixture of mildew and dirt you need something for both.
You might try this formula recommended by the Louisiana Dept of Agriculture.
Per Gallon of Water
1/2 cup chlorine bleach
1/3 cup low suds detergent , such as clothes washing detergent
1/3 cup of TSP
Apply with broom or brush over the ares and let sit for 1 hour: then hose off using a strong hose nozzle. This should remove most of the problem. You can repeat.if needed.
NOTE: If possible use industrial (heavy duty)bleach (from Home Depot, Lowe's etc)
TSP(tri sodium phosphate) is hard to find since many phosphate cleaners are no
longer available."TSP Cleaner"(no phosphate) is is not the same as TSP..
The authentic TSP leaves a residue that inhibits mildew re growth. The best place
to look for TSP is at your neighborhood hardware store or maybe on the internet
or a cleaning supply outlet.
How to fix lines/etch on bricks after pressure washing?
Radojka B
I made a rookie mistake and pressure washed my brick patio with my 1500 psi electric pressure washer, and now its got white lines all over it, almost like its etched in or something. Is there anyway I can fix or reduce the visibility of these?
Thank you
Answer
Next time use 20 minutes, a yard broom and a bucket of weak bleach solution.
No patio needs pressure washing, it's a frightful waste of water and electricity to clean an outside surface, it's not a living room, it's a garden.
Next time use 20 minutes, a yard broom and a bucket of weak bleach solution.
No patio needs pressure washing, it's a frightful waste of water and electricity to clean an outside surface, it's not a living room, it's a garden.
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