The workmanship guarantee versus the realistic product life span, the maintenance cycle for each surface on this coast, and the three small habits that stretch every dollar you spend on exterior cleaning.
Short answer: A workmanship guarantee covers the execution; the realistic life span of the product covers the rest. On this coast that means a soft-wash house wash every 12 to 18 months and a roof clean every 2 to 3 years, with the cycle named on the quote.
There are really two guarantees in honest exterior work, and operators who do good work name both. The first is the workmanship guarantee: the part that is on us. If we soft-wash a roof and leave a section streaked because we missed it, that is on us and we come back. If we fit gutter guard and a panel pops because the install was wrong, we fix it. If a sealer lifts because of how we applied it rather than how the product behaves, same. The second is the realistic product life span: the part that is on the product. A roof clean does not last forever, because mould spores will eventually land again. A reseal does not last forever, because UV and traffic wear the coating. A paint film does not last forever, because the manufacturer published a real number for how long it holds in this climate. An honest quote names both. A "lifetime guarantee" sticker named on neither is the warning sign.
The aim of a cycle is to wash a surface before the regrowth gets a footing, not after, because the second pass takes longer and costs more than the first. For a coastal home between the Gold Coast and Byron Bay, the cycles that hold are these. Soft-wash house wash on render or weatherboard every 12 to 18 months. Roof-safe soft-wash on tile or Colorbond every 2 to 3 years. Driveway clean and reseal every 2 to 3 years where run-off and traffic are heavy, every 3 to 4 years on a quiet driveway with little overhang. Gutters cleared once a year as a rule, twice a year under deciduous trees and after a heavy bushfire season. Pool surrounds and paving washed annually because of the algae slip risk. Closer to the water, shorten the cycle by around 25 percent. A house in Ocean Shores or Casuarina sits in a different salt load to one in Banora Point, and the wash cycle should reflect that.
Three small habits move the maintenance dollar further than any single product upgrade. Clear gutters before storm season so the water flows down the downpipe rather than over the lip and into the render. A blocked gutter on a coastal house is the single biggest cause of paint failure on the wall below, and a thirty minute clean prevents a four thousand dollar repaint. Trim back any tree limb that drops leaves on the roof or shades a wall for more than half the day, because the shaded damp face is where the mould regrows first and trim is cheaper than a re-clean. Watch the south face of the roof and the west wall after winter, because the regrowth shows up there first as a faint grey film, and a soft-wash spot treatment at that stage is a fraction of a full clean a year early. None of this is sales: it is what we tell our own neighbours, and it is what an honest cycle looks like on this coast.
Coastline Restoration Co.