[billyc]

 Have been asked to quote on a church - chemically cleaning of approx 800sqm

Heavy staining of carbon and atmospheric pollutants.

Lichen etc

Any one undertaken such a project- how did you price -
Tensid provide various chemical to do the job.

Scaffolding will already be on site - will try to post some pics later

Regards

Billy

[Andy Foster]

Hi billyc

Is it all stonework?
Bricks are easy but stonework can be a bit of a pain.
Tensids chemicals are great... am in the middle of a job at the moment which is majority brick but with stone 'topstones'.  The bricks (90% of the job) are coming up great but for heavily polluted stone areas, it needs a prewash and then restoration cleaner afterwards... doubles the cost of the chemicals and the time it takes to do the job.  I normally quote between £12 and £18 per square metre so if it is all stone I would err towards the latter if I were you.

I would expect to complete between 40 and 50 square metres a day.

Nice little earner mate, good luck.

Andy

[trevor perry]

be very careful with those chemicals especially if working from scaffolding, you will need full face mask and always wear your gloves make sure you rinse down scaffolding fterwards as any chemical that is left on can give very nasty burns.
 i always find it best to do this work from a cherrypicker.