How can I remove cement splatter from a house?

Try strong vinegar. Make sure it's compatible with the siding by just trying a small spot first. It may discolour the siding.

I used a putty knife and a scrubby

I'm sure you could use the same formula below for your house...

Old or Hardened Concrete Splatter

1. Fill a spray bottle with water and mix about 2 to 3 drops of dish soap into it. ...
2. Continue spraying the soapy water on the window to keep it wet, and use a plastic putty knife to scrape the softened concrete from the window.
3. Rinse the window with clean water from a hose or a sprayer.

More items...•Dec 27, 2018

How to Remove Concrete Splatter From Windows | Home Guides | SF ...

https://homeguides.sfgate.com/remove-concrete-splatter-windows-29129.html

We had this problem when we did our concrete patio. Concrete splatter was everywhere on the side of our house. I tried to get it off before it hardened. You have a little while to work so no worries! I just used a rag dipped into soapy water. I can't remember if I used dish soap or car wash but I am sure either would work. It took a while but I continued to wash the surface until it was all removed. Once it has hardened obviously it is more difficult to remove but you might have to use something to scrape it off. Just be careful it doesn't hurt the siding.

If it has dried completely, use a plastic scraper to scrape as much off as possible. Then apply a moistened rag to the areas and apply saran wrap or aluminium foil on top to hold the cloth against the wall using masking tape. Let the area soak a while and then scrape again. It is a tedious task but it can be done. Lesson learned is to be sure to mask off any areas adjacent to the concrete being poured. You can use large plastic drop cloths or old shower curtains, etc. It is amazing how the concrete splatters in areas you'd not thought it would go. A final solution I found when this happened on my rental home was to use gasoline....yes, gasoline soaked cloth, it seemed to remove the final bit of the cement splatter (it was a metal sided home that never needed to be repainted)

Well thank you guys! I do concrete for a living and always end up being the one that gets to clean up the sides of the structure we were pouring the concrete around. It's been my experience that water will help, but too much of it will just make a mess. A damp cloth a plastic putty scraper, and a really tough green scrubby have always been my go-to to keep from damaging the paint on the wall. I'm always on the lookout for easier solutions. I never thought of trying gasoline, but I I used to work at a car wash and they taught me that if you accidentally hit a car and trade a little bit of paint, lighter fluid will take it right off with minimal damage to your own paint. Something to do with the fumes because it would only work for a few seconds after being on the rag then you would have to apply more. I'm actually on my way to clean some up right now so I'll have to try the gasoline.