Clean It Up

UK General Cleaning Forum => General Cleaning Forum => Topic started by: AquaMagic on October 07, 2007, 01:18:55 pm

Title: Concrete Slabs and Render
Post by: AquaMagic on October 07, 2007, 01:18:55 pm

Hello, my bro in law, laid some concrete slabs and has since build a small wall which he rendered with Sharp sand and concrete, now its all dry he wants to clean the slabs down, he has access to a powerfull pressure washer from work but wondered if we need and chemicals, and would a wirebrush be too abrasive?

many thanks

Dene

Title: Re: Concrete Slabs and Render
Post by: Kwackers on October 07, 2007, 02:43:03 pm

Did some with a cold pressure washer and it came up fine.

used a bit of watered down brick acid, left it for 10 minutes then washed it off, took a while though

Title: Re: Concrete Slabs and Render
Post by: *Chris Browne on October 07, 2007, 02:45:21 pm

I did some chemical free pressure cleaning of slabs, recently and they came out fine.


Chris

Title: Re: Concrete Slabs and Render
Post by: Kwackers on October 07, 2007, 06:59:03 pm

Be Better if you had hot water on it.

Title: Re: Concrete Slabs and Render
Post by: steve doyle on October 08, 2007, 01:27:22 am

If you are using acid, dilute it down, but before you put it on , wet the area down so the flags dont absorb it.