Treating growth on painted render and brick in Chaddlewood

Chaddlewood, Devon - PL7

Where a Chaddlewood wall has gone patchy rather than evenly dirty, the cause is nearly always local: a downpipe, a hedge, a shaded corner. That is where we look first.

What Chaddlewood walls are usually finished in

  • A rendered plinth takes more water than the face above it and is usually the first band to look tired.
  • Where render sits over insulation, the wall is more sensitive still and the mix is weakened accordingly.
  • Cleaned brickwork exposes the true state of the pointing, which is useful even when it is unwelcome.
  • Engineering brick and facing brick behave differently, and the softer one sets the method.
  • Cleaning before repainting is not optional, because paint over live growth fails from underneath.
  • Where a painted wall has been patch-repainted, the patches clean at a different rate.

Low pressure, longer dwell

  1. 1.Steps and thresholds get a plain water rinse at the end so nothing is left slippery.
  2. 2.Rainwater goods are checked while the elevation is being worked, since a blocked hopper explains most single-strip staining.
  3. 3.Rinsing, where it is needed at all, runs top down at a pressure you could hold your hand in front of.
  4. 4.Ground-level splash marks are worked separately from the main face, since they are silt rather than growth.
  5. 5.Corners are worked from both directions so the overlap sits in the angle and not on the open face.
  6. 6.Anything that has to be moved - bins, planters, a bike - goes back exactly where it was found.
  7. 7.Work stops if a wall turns out to be wetter inside than out, because cleaning is not the answer to that.
  8. 8.The same operator works a whole elevation so the application rate stays consistent across it.
  9. 9.Any window left open is closed, or that section is skipped and left for a second visit.
  10. 10.Reach is taken from the ground with a telescopic lance wherever the elevation allows, which keeps ladders off soft render.

Small things that make the visit smoother

  • Mention any cladding or timber detail that you would rather was left alone.
  • Tell us about any planting you particularly care about at the base of the wall.
  • Note where hoses can be run without crossing a doorway.
  • Note any external socket or garden power run near the base of the wall.
  • Point out where the render was patched, since patches clean differently from the original.
  • Say where the outside tap is, and whether it runs at any pressure.
  • If there are children's toys or a trampoline against the wall, they need to move.
  • Mention whether the drive drains to a soakaway that already struggles in heavy rain.

Facts on record for Chaddlewood

  • PL7 covers 3 town hubs and 7 villages or districts in our radius.
  • Nearest full coverage hub: Plympton (PL7), Plymouth City Council.
  • Postcode district: PL7. County: Devon. Approx 4.7 miles from the PL3 base.
  • Typical roof covering here is concrete interlocking tile, which affects what washes down onto the walls.
  • Access is usually via A38 and A374.

See everywhere we cover in PL7

What is actually growing on the wall

  • Rain running off an unsealed timber fascia carries tannin down the wall as a brown stripe, not growth at all.
  • Once lichen is established it holds water itself, which makes the surface beneath it wetter than it started.
  • Growth thickest at head height usually means splash from a hard surface rather than run-off from above.
  • North-east corners hold frost longest and thaw slowest, which extends the damp window every morning.
  • Washing without a biocide simply resets the clock and leaves the roots in place.
  • An untreated wall carries a spore load already, so regrowth after a rinse is faster than first growth ever was.
  • A cracked cill throws water back at the wall instead of clear of it.
  • Sheltered courtyards feel pleasant and dry slowly, which is a bad combination for a wall.
  • A tree removed years ago can leave a wall that greened in its shade and never fully recovered.

Assessing a PL7 elevation

  1. 01Where the pattern is a band at the bottom, splash from the ground is doing it.
  2. 02Photographs taken before work provide the reference for judging the result later.
  3. 03Whether the render is thin-coat or traditional is checked at a bead or a reveal.
  4. 04Colour matters: green suggests algae, black suggests fungal spotting, grey-white crust suggests lichen.
  5. 05Previous cleaning is usually visible as a slightly different texture rather than a different colour.
  6. 06Where a wall meets a roof abutment, the flashing is looked at first.
  7. 07A wall that feels chalky under the hand is telling you the coating has aged, not that it is dirty.
  8. 08How quickly a splash of water darkens the surface says how porous the finish has become.

Nearby villages and districts

Common questions about wall softwash

Do you clean UPVC panels and door surrounds?
They are wiped by hand rather than sprayed.
Do you need a parking space?
Somewhere within hose reach of the elevation is enough.
Is thin-coat render different from sand and cement?
Yes, and it is more sensitive. Thin-coat systems get a weaker mix and a longer dwell rather than more pressure.
Do you clean boundary walls too?
If they take the same method as the house, yes, in the same visit.
Will it damage the pointing?
No. That is exactly what pressure does and softwash avoids.
Will treatment damage a wildlife pond?
Ponds are sheeted and run-off is diverted well away from them.
What is the difference between this and a wash down?
A wash down removes what you can see. A treatment removes what is growing, which is not the same thing.
Will my drive be slippery afterwards?
Anything walked on is rinsed clear before we leave.

Describe the staining and we will name it

Green film, black spots or grey crust all behave differently. Tell us which one you are looking at.

In a sentence or two

Textured finishes hold damp because of their shape, not because of neglect. A wall is part of a system that includes the roof above it and the ground below it. Book it in autumn and the property goes into the wet months clean, which is when the difference shows most.

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