The run-off from our roof at the rear of our house falls on our patio concrete slab. Therefore, over the years (35 year old house) the slab has turned black. How can I remove the black (mold?) and restore the slab to it's original appearance?
The black discoloration is algae that has grown in the wet season and dries black. It is easiliy removed with a pressure washer. I recommend you consider purchasing an electric power washer at $130 or a more powerful gasoline powered washer at about $300. You can rent a commercial powerwasher for $65/day. The cleaning can be done is less than 1-hour with a pressure washer using no chemicals and requiring no scrubbing. It will deep-clean the concrete and restore the original texture and color.
Power washer is a very useful tool for cleaning around the house. Other than that you can try clorex bleach(for laundy) to remove the black algae stuff off the gutter pipes and roof over hung. I poured it in a paint tray and applied on the surface with a 3" brush. Then wipe off with a old damp cloth. Doing every 2' at a time.
Hope this helps.
Hope this helps.
- 15 Old House Features We Shouldn't Abandon
- 17 Tiny Bathrooms We Love
- 16 Designs for a Low-Cost DIY Coffee Table
- Insanely Easy 60-Minute Home Improvements
- 12 Sheds You Could Live (or Work) In
- Assembly Required: 15 DIY Kit Homes
- 30 Things Every Adult Should Know How to Do
- 10 Surprisingly Simple Woodworking Projects
- See the Most Highly Anticipated Colors for 2015
- 9 Ways to Make Your TV Look at Home
- 9 Totally Amazing Mobile Home Makeovers
- 10 Unexpected Spots for Accent Colors
- 10 Fantastic Furniture Makeovers
- Worth It: 8 Renovations That Pay You Back
- 9 Closet Storage Tips from a Pro Organizer
- 7 Seriously Surprising Spots for a Fireplace
- Laundry Room Ideas to Knock Your Socks Off
- 12 Tiny Gardens to Grow on a Tabletop
- Supersize Your Small Bathroom with 8 Tips
- Kitchen Envy: 10 Rooms We Love