Low-pressure wall treatment across Chilsworthy
Chilsworthy, Cornwall - PL18
Everything below applies to painted render and stone elevations in Chilsworthy, inside the PL18 area we cover in full. The method is set by the surface and the exposure, and nothing else changes it.
Quote for a Chilsworthy property
Monday to Saturday, 8am – 7pm
How the work is actually carried out
- 1.Everything is packed down before the last inspection, so the wall is judged clear of kit.
- 2.The wall is left to dry naturally rather than being wiped, which is what keeps the finish even.
- 3.Hoses run outside gates where children or dogs are about, and gates are closed behind us each time.
- 4.Old paint flakes are removed by hand before treatment rather than blown around by water.
- 5.Windows are checked from inside where access allows, because a closed window with a broken seal still lets water past.
- 6.Treatment goes on from the bottom of the elevation upwards, which stops clean streaks forming where liquid runs onto dry surface.
- 7.Where a property is rendered onto insulation, extra care goes into avoiding water at the bead edges.
- 8.External drains below the work are covered with a grate mat and cleared before we leave.
- 9.A final walk of each finished elevation happens with the property owner where they are home, and by photograph where they are not.
- 10.Beds and borders at the foot of the wall are soaked with clean water first, so any run-off arrives diluted.
Reading the finish on a Chilsworthy elevation
- Coloured through-render fades gradually, so what looks like dirt on an older wall is sometimes age in the finish.
- Patched render takes treatment differently from the original, which is why patches are identified before work starts.
- A test patch low down and out of sight is how failing paint is found deliberately.
- Painted plinths take splash and are worked as a separate band from the main face.
- Treatment on stone is applied in stages so it soaks into the joints rather than running off the faces.
- The rinse on stone is gentle enough that nothing is driven into an open joint.
The reasons behind the staining
- Lichen anchors into the surface rather than resting on it, which is why brushing achieves nothing and pressure achieves damage.
- A wall that faces a large expanse of glass on another building gets less sun than its aspect suggests.
- Mild damp winters here keep growth metabolising through months that would stop it in a colder, drier county.
- Growth thickest at head height usually means splash from a hard surface rather than run-off from above.
- Render that has lost its water repellency absorbs and holds surface water instead of shedding it.
- Textured coatings have more surface area than smooth ones, and more surface area means more places to hold damp.
- Roof valleys concentrate run-off, so the wall under a valley outlet is loaded more heavily than anywhere else.
- Where a hose reel or water butt overflows against a wall, the staining follows the overflow path exactly.
- A downpipe discharging onto a hard surface next to the wall sends the water straight back at the brickwork.
Practical points to sort first
- If parking needs a permit or a bay suspension, tell us early.
- Tell us about any previous treatment that came back quickly, and how quickly.
- Point out any window that does not seal properly, so it gets sheeted rather than sprayed near.
- Point out where the render was patched, since patches clean differently from the original.
- Let us know if anyone in the house works nights and needs quiet at a particular time.
- Point out ground-floor windows that are painted shut, as they need different masking.
- Mention any cladding or timber detail that you would rather was left alone.
- Clear the base of the elevation of pots, ornaments and loose paving where you can.
How the wall is read first
- 01The state of the pointing is judged at the most exposed corner, not the most convenient one.
- 02How quickly a splash of water darkens the surface says how porous the finish has become.
- 03The age of the finish is estimated before a strength of mix is chosen.
- 04The condition of the cills tells you how much water has been running down the face.
- 05Hollow-sounding render is checked by tapping before any water is put onto it.
- 06A wall that is warmer than its neighbours on a cold morning is likely holding moisture.
- 07Where the wall carries a previous coating over render, its edges are inspected for lifting.
- 08Where the pattern is a band at the bottom, splash from the ground is doing it.
Before you get in touch
- Should I fix the downpipe before or after?
- Before, if it is the cause. Cleaning around a live leak puts the stain straight back.
- Do you clean stonework?
- Yes, with the method set by the softest part of the wall, which is almost always the mortar.
- Does softwash actually kill the growth or just wash it off?
- It kills it. The treatment is left on long enough to work, which is why the surface keeps lightening for a week or two after the visit.
- How long before I can repaint?
- Several dry days after the wall has been treated and rinsed.
- Can you get behind downpipes?
- Yes, by hand. It is the part a sprayed pattern always misses.
- Will the colour come back?
- If the original finish is sound, the colour underneath is usually still there and comes back with the growth removed.
- Is there a smell?
- There is a mild one during application that clears within a few hours.
- Can the whole house be done in one go?
- Often, depending on size and access. Larger properties split naturally into two visits.
Chilsworthy in plain facts
- Typical wall finish here is painted render and stone, which sets the cleaning method.
- Recorded character: village. Hilltop village overlooking the Tamar.
- Access is usually via A390.
- Typical roof covering here is slate, which affects what washes down onto the walls.
- PL18 covers 2 town hubs and 3 villages or districts in our radius.
Also covered near PL18
Plan the whole outside once
Roof, gutters, walls and hard surfaces in the right order costs less trouble than doing them piecemeal.
The short version
The point is not a clean wall for a fortnight. It is a wall that stays clean because the roots went with the surface growth. An honest no is worth more than a job that was never going to work. The mortar is the weakest link on most walls, so the mortar sets the pressure.