GRIT
BLASTING
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Grit blasting is more commonly
used on the harder more dense materials, such as granites, hornfels, basalts,
etc..this method of cleaning works extremely well on rubble stone walling,
where low air pressure regulation is still necessary, to combat the problem
of pitting, this is caused (pitting) when the grit makes small indentations
in the stone, this in most cases can look unsightly and can also damage
the masonry, as rain water fills the cavities on the pitched or ashla
face, over a period of time, water retention and frost can greatly accelerate
the process of weathering. On softer stone where a conventional grit blaster cannot be used, the joss system is introduced, this is a much more gentle process, using calsite (a very fine crushed marble) as this is a powder rather than grit, the joss system is less likely to cause pitting, but is not as effective on paint as a grit blaster. |
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MERTHYR
ST,
CARDIFF.
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This residential property was grit blasted to remove many years of built up paint from the stone work, which revealed repairs from pointing to plastic repairs using a reconstituated stone mix. So full restoration works were required to make the property in good order. This also made the property return to its former glory, which not only makes it more pleasing to the eye, but also adds value .After the restoration works were completed we found it necessary to seal the stone with silicon sealant to hopefully slow down the weathering process A very enjoyable project. |
To
zoom
in 'click'
on the
image
above
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In this section you will find out how to take
care of stonemasonry, how to restore buildings to there former glory,
and tips on how to slow down the weathering process, by using the right
methods of cleaning and restoration for that particular type of stone. |
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