[Slacky]

Morning guys.
Ive been asked to clean this traffic discolouration on this wooden cladding prior to them painting it or re-staining it.
Im in the throes of considering TFR, pressure washing or soft washing. Or a hocus-pocus mix of all three!

Would biocidal wash or SH sort this effectively please?

[nathankaye]

Soft wash would sort it, you don't want to be blasting it with a pressure washer, because if your not careful you could do more damage than good.
I normally advice the customer that they need to treat the wood afterwards or you could and adjust price accordingly.

[Plankton]

Just hypo but maybe include cleaning the slabs as it'll look daft.
Or stick a tarp down to catch the run off.

[Slacky]

Soft wash would sort it, you don't want to be blasting it with a pressure washer, because if your not careful you could do more damage than good.
I normally advice the customer that they need to treat the wood afterwards or you could and adjust price accordingly.

The wood is meant to be being stained afterwards so that should resolve that issue.

[Slacky]

Just hypo but maybe include cleaning the slabs as it'll look daft.
Or stick a tarp down to catch the run off.

I think a tarpaulin is a good idea, it would look like a bodge job with streaks across the slabs.

[CleanClear]

1st Choice is Oxalic Acid. Apply from bucket with paint brush, leave to dwell then rinse off with your wfp.
2nd Choice, same method different product............ oxiclean, or as we know it.



You tube will show you loads of examples of both in action.

[nathankaye]

Above is very time consuming and not as effective as hypo

[Slacky]

Blackwash at 10%

[nathankaye]

Black wash is basically an expensive soft wash (made with hypo,) 

[colin bird]

I have no knowledge of that type of cleaning,but my thoughts are timber is absorbent,so if the timber has been there a while a surface clean won't work as the timber has been dyed.
But fair play if you clean it,and well done if it comes up well

[Slacky]

Black wash is basically an expensive soft wash (made with hypo,)

I thought they were exactly same thing. Admittedly, one is made, mixed etc by Benz, but soft-wash/hypo/benz, all the same aren't they?

[Splash & dash]

I would do it with farm hypo at £10 for 25 ltr drum and mix it 4-1 spray on and light scrub with brush rinse re apply if needed should come up quite well  I think

[Slacky]

Whats the farm hypo marketed and sold as?

[Slacky]

I guess this is it?

http://darrantchemicals.co.uk/sodium-hypochlorite

[Splash & dash]

Whats the farm hypo marketed and sold as?

Any farm supplies shop will have it it’s sold under several names : dairy hypochlorite: sodium hypochlorite it varies in strength from 10%-15% the brand that we are using is Evans at the moment it’s only 10% but is cheap as chips they have it on offer at the moment 2x25 ltr drums £20 I think that’s very good value for money

[Plankton]

Just hypo; http://www.bonnymans.co.uk/products/product.php?categoryID=1929&productID=8881
I think in paddy land they have different rules for chems so your paying for paddy approved chems, I use the above with clever wash.

[CleanClear]

Black wash is basically an expensive soft wash (made with hypo,)

You seem knowledgeable in this area Nathan, what is "softwash" ? I thought it was a technique, using whatever substance you need for whatever problem you face. You seem to imply (to me at least) that softwash is some sort of chemical thing ?

[CleanClear]

Above is very time consuming and not as effective as hypo

Do you know what Sodium Hypochlorite does to wood ? See if you can find a wood restoration , preservation site or similar that promotes it ?

[CleanClear]

Whats the farm hypo marketed and sold as?

Great question...... its sold as Sodium Hypochlorite. Its generally about 11%, sometimes more. The reason you asked this question, i guess, is because chemical suppliers have told you that their 14/15% mix is stronger. But then it all gets watered down to about..this or that.......we pay about £12 for Hypo here for 25 litres, varying between 11% and 15%. From either Farmers markets or chemical suppliers.  The Facebook chem supplys are having your pants down, there's no easier way to say it...

[Splash & dash]

Above is very time consuming and not as effective as hypo

Do you know what Sodium Hypochlorite does to wood ? See if you can find a wood restoration , preservation site or similar that promotes it ?

It’s fine if you wet it down with water first don’t use to strong a mix and rinse well have a look on the Benz Softwash site on there videos they promote it for wood , bleach is used extensively inthe market place for bleaching wood pulp and timber for building trades to alter the colours of timber I hav3 done my fence for the past 20 years with hypo and it’s fine but starting to look taty due to age but the hypo hasn’t hurt it at all