very old bricks


  #1  
Old 05-11-07, 04:15 PM
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very old bricks

my house was built in 1935 and i am getting ready to power wash and clean the brick....alot of the bricks on the house are very dark red and alot of bricks appear to be burnt.....i was told this is a very strong brick is this true??

i have been doing some test cleaning on a unexposed area of the garage with some restoration cleaner......it recommends diluting but i don't get desired results unless i use full strength...they recommend not using full strength because it can damage the brickface fire skin

i haven't noticed any damage on the areas i have tried it, i was wondering if i have a supposed harder brick if i have a thicker fire skin???

or is this fire skin very thin and can't be seen?
 
  #2  
Old 05-11-07, 09:53 PM
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If it is not working at the recommended dilution ratio, it may not be the proper product to use. The "fire skin" thickness is variable even among the same batch of brick, and you certainly do not want to damage it, either with an acidic cleaner or an incorrect nozzle on your power washer.
 
 

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