Sandstone cleaning and sealing in La Perouse
La Perouse sandstone takes salt and wind from both the ocean and the bay. We clean it gently and seal the surfaces that face the weather.
- La Perouse 2036
- $20 million public liability
- Price on request
Sandstone on La Perouse homes is mostly fences, steps, garden walls and paving, and much of it has weathered for decades on an exposed headland. Seaward faces carry a gritty salt crust and soft, sandy edges. Shaded walls under heath and trees grow lichen, paths take leaf stains, and gardens leave gritty tide-marks along low walls. Older properties often have patches of hard cement from past repairs, and metal gates leave rust marks. We look at each surface, test a small area, and explain what can realistically be achieved before quoting, because weathered stone cannot be made new, only cleaned and protected.
Grit and loose salt come off with brushes and a vacuum while the stone is dry; a soft fresh-water rinse follows, and any salt held deeper in a wall is drawn out by poultice. Lichen and algae are treated with a biocide and given plenty of time to die back. Leaf stains respond to a mild sandstone cleaner, and rust to an iron poultice rather than acid. Hard cement patches can be raked out and replaced with a softer mortar. No high-pressure jet is used on this stone. Every drop of rinse water is trapped and pumped into a tank to leave with us.
On this headland, the surfaces worth sealing are the weather-facing steps, paths and fence caps, where an impregnator cuts down how much salty water the stone absorbs yet leaves its pores open to dry. Walls holding back soil and very old walls are generally left unsealed. Natural and enhancing samples go down first so you can compare them in daylight. Sealing is done only on calm, dry days, which on this headland means watching the forecast. We note the product and areas, and suggest a yearly check by dripping a little water onto the stone to see if it still beads or darkens straight away.
Frequently asked questions
Sandstone questions we hear in La Perouse.
Can weathered sandstone be made to look new?
No, and it should not be. Cleaning restores colour and removes growth and salt, but weathered character remains. Badly eroded stone needs a stonemason.
Is sealing worth it on an exposed headland?
On steps, paths and caps, usually yes. It slows salt damage. Expect to reseal more often than in sheltered suburbs.
Do you use acid on rust stains?
No. Acid eats the natural cement between sandstone grains. Iron stains come out with a dedicated rust poultice instead.
How often should we rinse our sandstone?
A fresh-water rinse every few weeks on seaward surfaces keeps salt from building up between professional cleans.