You are advised that such concrete contamination has the very high potential to permanently damage the painted aluminum roofing and curtain wall profiles as well as cause major damages to the glass surfaces, furthermore and in addition no attempt whatsoever has been made by ITD to wash off and/or clean down the concrete spillage affecting our installed works, such concrete slurry can potentially damage the aluminum and glass surfaces and result in permanent scratching and etching into the aluminum and glass finishes.