Browse Forums Landscape & Garden Design 1 Mar 02, 2011 4:59 pm Someone told me that blocks such as Tasman and the like are prone to staining over time. I have definitely noticed, while driving around, that lots of older 'tasman' style walls are badly discoloured/darkened, especially the lighter and sandy coloured blocks. Why is that, can it be washed away and can anything be done to prevent that from happening? It appears that moisture in the retained soil affects the blocks badly. Can some kind of plastic sheeting be placed behind the wall to prevent that? Or would that be a no-no for some other reason, or totally ineffective (or only effective short term)? My signature is distracting people from my wise posts ... Re: Feedback on dry stack retaining walls 2Mar 06, 2011 8:36 pm Hmm ... feedback = zero. Question too trivial?? Or hard?? Or boring? Anyhow, I'm not closer in figuring out why these blocks go black and is it possible to wash those stained blocks. My signature is distracting people from my wise posts ... It's possible but a soak well is usually much larger. Your 'soak well' only holds 424 litres when full. What is your soil type? Soak wells need sandy soils. 10 9151 DIY, Home Maintenance & Repair Ditto 3M Claw, expensive but best thing I've used to date. I put two of the 11kg ones in for a 12kg mirror on the wall, and its been great for 4 years now. 4 2164 |