A little more subtle than trowel damage, scraper damage is probably the most common form of scratch damage on a construction development.
The common misunderstanding is that the blade itself causes the scratching. We constantly hear that someone using the wrong type of blade has scratched my glass. The blade itself has little to do with causing scratch damage.
The real cause of scraper damage is the incorrect use of the scraper. The common mistake is to keep the blade in contact with the glass on both the forward and backward motion whilst removing debris from the glass surface.
As the blade removes debris on the forward motion, the debris gets caught under the blade and it is the debris (under the pressure of the blade) that causes the scratches on the backward motion. As more debris gets caught under the blade, the more scratches will be left in the glass. The correct way to use a scraper is to remove the debris on the forward motion, lift the blade away from the glass, wipe the blade - Carefully - and repeat the process until all the debris has been removed.
Repair Solutions: for large areas or multiple units
If you have a large area or multiple units to repair, our advice would be to call a professional glass polisher. As they say, time is money and this includes your time.
It would be misleading to try and give a general cost of repair on a website as each scratched glass situation is different, but for large areas of scratched glass or for multiple units, services of a qualified glass polisher offer genuine savings, often in excess of 80%, on the cost of replacing scratched windows and doors.
For areas greater than 50 sheets of A4 we would recommend you ask for a senior technician to visit your site to assess the works required and provide a written quote.
The Cost Effective Option. On paper, professional glass polishers are not the cheapest glass polishers on the market, but the reality is that a Guild qualified glass polisher will repair a least twice the area than that advertised by most others othering scratched glass repair services. This makes our members extremely cost effective and our members are still the only glass polishers able to guarantee distortion free repairs.
Repair Solutions: for small areas or single units
For smaller areas or for single unit repairs, employing a professional glass polisher may not be the most cost effective option. You might find that a D.I.Y Scratched Glass Repair Kit would be a more cost effective option for you.
A quick note about D.I.Y Kits. There are a number of kits on the internet that claim to remove scratches from glass. Please be careful. Kits with just a felt pad and polishing compound will not remove anything other than very, very fine hairline scratches. The same can be said for kits containing 'Jewlers Rouge', polishing powder, usually pink, which you mix with water.