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sandstone

Sandstone is a clastic sedimentary rock composed mainly of sand-sized (0.0625 to 2 mm) silicate grains. Sandstones comprise about 20–25% of all sedimentary rocks.Most sandstone is composed of quartz or feldspar (both silicates) because they are the most resistant minerals to weathering processes at the Earth's surface. Like uncemented sand, sandstone may be any color due to impurities within the minerals, but the most common colors are tan, brown, yellow, red, grey, pink, white, and black. Since sandstone beds often form highly visible cliffs and other topographic features, certain colors of sandstone have been strongly identified with certain regions.
Rock formations that are primarily composed of sandstone usually allow the percolation of water and other fluids and are porous enough to store large quantities, making them valuable aquifers and petroleum reservoirs.Quartz-bearing sandstone can be changed into quartzite through metamorphism, usually related to tectonic compression within orogenic belts.

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  1. J

    burleywood sandstone

    Hi all, a friend has recently has a burleywood sandstone floor laid, with the tiler sealing after with stonetect impregnating sealer. I've not used this stone before, but he asked me for some advice. it appears some of the tiles seem to be polished thus giving glossy finish and smooth to touch...
  2. B

    Cleaning Indian Sandstone tiles - help

    Hi, first time poster so me gentle. We have just had some light coloured Indian sandstone tiles put down in our kitchen. The guy who installed them put a couple of coats of sealer on and said we should top it up every 6 months or so. They have been down for about two weeks and already we have a...
  3. E

    New Sandstone Floor.

    This is a new floor in a large country house. The customer called me and asked me to come and have a look at the floor as it has only be down 6 weeks and they cant keep it clean. The tiler had sealed it with an HG sealer...I did a test clean...I think it needs a different sealer.
  4. U

    Which Sandstone Impregnator/Sealant (Outdoor)

    Hi Folks, I laid a sandstone patio a few years back. Now after spending ages jet-washing and re-grouting several times over, I think it's time to apply a sealant. I'm looking for a matt finish impregnator/sealer and from trawling the web, it sounds like LTP Mattstone does the job for less...
  5. S

    Black Limestone or Sandstone

    I need advice about the patio, I'm not sure if black limestone and Indian Sandstone are the same things? I had a builder that did new patio and on the contract agreement, builder and I agree to have Indian Sandstone. After a few weeks, I noticed the colour starting to fade out to light grey...
  6. B

    Granfix sandstone grout

    Hello, Just started regrouting my kitchen floor. Done about a third of it with some granfix sandstone grout I had left over from a while ago and it would seem most of the tile shops dave switched to BAL etc. Will I get a good match from another supplier (is sandstone the same across the...
  7. J

    Staining on pietra serena sandstone

    JUST LAID A PIETRA SERENA SANDSTONE FLOOR IN A KITCHEN. IT WAS PRESEALED THREE TIMES WITH STAINSTOP BY A DRYING AND SEALING COMPANY, SO STONE WAS DRY WHEN SEALED. LAID STONE IN PCI CARRAMINT ADHESIVE WHICH IS RAPID SET WITH NEW LOCK IN MOISTURE TECHNOLOGY SO NOTHING MIGRATES THROUGH STONE TO...
  8. B

    Fossil mint indian sandstone patios

    Hi I`m new and I need help and advice. Last summer my husband and I laid 50sq m of above stone in garden but no one told us to seal it and now it looks a grreny brown dirty mess! Help, how do we return it to its former glory and keep it that way?<br><br><br>
  9. D

    algae etc on sandstone

    with the onset of autumn comes the dread green slimy algae on your patio/flagstones. I've always got the pressure washer out to deal with it but it's always in the back of my mind about blasting the pointing out. Today I took a gentler approach, good old Jeyes Fluid diluted to about 1:20,,,,with...
  10. I

    Removing sealant Lithofin on Indian Sandstone

    Recently treated a new indian sandstone patio with Lithofin Stainstop MN - seems like a great product but in places i've clearly failed to remove all the excess product resulting in some watermarks... (wife's not impressed). Secondly, even if i had applied 100% evenly the water repellency is...
  11. W

    sandstone

    just laying some honed sandstone at the moment. it has marks left on the face of it from the soft foam sheets inbetween them when packaged. anyone got any idea on what removes these marks as water on its own wont remove it.
  12. J

    Help with water marks on sealed sandstone

    Hi allWe've spent a fortune on our new patio and were distraught to find that once sealed; any water, rain or tap, leaves it with White spots.Our builders sealed it with a wickes sealant and it cost about £25.Help with removing it and if the white marks can be avoided would be very much...
  13. C

    sandstone sealant problem

    Hi, I am laying Indian Riven Rainbow sandstone on the ground both inside and out but am getting conflicting advice about when to seal. On the one hand I am told to wait for several weeks for efflorescence before sealing but on the other I am told to seal before grouting to avoid 'picture frame'...
  14. R

    sandstone tiles fixing

    Have 170 m2 sandstone tiles (900x600) to fix on concrete.All the stuff is supplied by customer.Concrete base is very uneven and humpy.Tiles mean to be fixed on sand-cement bed.But builders says that minimum thickness of the bed is 50mm.there is no way to raise the floor so high(50mm bed and 20mm...
  15. D

    exterrior sandstone flags, would you seal them?

    got my sandstone flags to finish off round my decking area today, but just wondering wether or not to give them a coat of impregnating sealer or not (I am keen to try LTP's new H20 sealer too). It'll be simple enough to keep the unsealed flags clean enough with my pressure washer but I really...
  16. J

    sandstone step

    hi i have a late victorian house with a large sandstone step 5ft. x 3ft tiled in welsh quarry tiles.the past two winters being minus 15 to 20 have resulted in tiles lifting.is there a solution to stop lifting? no pva was used to seal step and flexi fast setting was used.these tiles sat ok for...
  17. D

    sealing sandstone

    got another bonus tonight when a guy phoned to confirm a sandstone floor i had priced,the only problem is these look like an inbetweeen of tiles and paving slabs! what would the best sealer for these be? and it's not to be a colour enhancer!
  18. S

    Much sandstone in the u.k. ?

    Just wondering if you guys have much sandstone in the uk? Here in aus there is lots of it, and its definatley in my own opinion one of the most beautiful stones. it is very warm feeling, and comes in lovely shades and natural patterns, and even has shades of red, pinks and purples in the case...
  19. S

    Indian Sandstone & Grout Removal Problem

    Hi All, I've just had the unfortunate experience of having to remove excess grout from the top of sawn Indian sandstone. I used a very generous coat of Lithofin Stain Stop + to seal the tiles (850mm x 560mm). This worked very well and water actually beaded up on the surface, I haven't seen a...
  20. S

    Interesting sandstone

    We've been fixing a lot of Bradstone sandstone in a private residence. The other morning the owner was complaining about oily footprints on some of the tiles. He then became very happy when it was pointed out to him the marks were actually fossilised leaves. Anyone come across this before? I...
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