Cleaning Indian Sandstone Paving (Harpenden, Hertfordshire)

“We had all our external conservatory, fascias, soffits and gutters cleaned and Indian Sandstone paving pressure washed. Work was carried out in a very professional manner and extremely conscientiously. We are very pleased with the results. No hesitation in providing a positive recommendation.” – Clive Whyatt

Recently received a telephone call from a property owner in Harpenden with a major patio problem!

Project details

  • Great Outdoors Exterior Cleaning: Several years ago they had a large patio laid using Indian sandstone paving; it had gradually become covered in a green algae and black spots. Every year they attempted to clean the Indian Sandstone paving using a domestic Karcher washer, this improved the appearance but they never managed to remove the black spots and lichen!

    On viewing the Indian Sandstone Great Outdoors Exterior Cleaning reassured the customers that we could return the patio back to its former glory and remove the unsightly black spots which had formed on the Indian sandstone paving.

    On our return we firstly pre-washed the Indian Sandstone using controlled pressure / water flow, this is essential whilst cleaning Indian sandstone as high pressure washing can damage the stone. This wash removed the majority of the algae. We then applied a chemical to the paving whilst the Indian sandstone was damp, we allowed the chemical to dwell and then re washed the paving, all of the black spots were removed the results were fantastic ! The customer was thrilled with the results. We use the same method to clean Yorkstone.

    Great Outdoors Exterior Cleaning not only cleaned the customers Indian sandstone patio they also cleaned their Conservatory,Upvc and cleared their guttering!
Project skills