How Do I Remove Old Line Markings For Improvement Jobs?
Line Markings are an extremely important aspect of our roads, and must be kept to a high quality at all times. Because of this, the materials of the line markings themselves are specially created to be very durable and long lasting, which although is great for their intended use, there will come a time when they need to be removed, and this makes that job very difficult.
There are three main methods for removing line markings, all with their own advantages and disadvantages:
Hydroblasting is the most environmentally friendly option out of the three mentioned here; It consists of nothing but water being jetted out of a hydroblasting machine at a very high pressure. This does no damage to the surface underneath if handled properly, as the pressure levels can be controlled and there are no chemicals involved. Although this will effectively remove most line markings, in some cases it unfortunately will not do a sufficient job on extremely heavy duty markings such as epoxy and thermoplastic.
The most forceful method of the three, Grinding is performed using a 'grinding machine' with steel or carbide teeth. During removal, these teeth will scrub against the line markings, powerfully removing the colouring material. Due to the force that this method uses, you are guaranteed that this will effectively remove thermoplastic lines. Although being a fast and reliable option, grinding will almost always scar the surface underneath the line markings due to the force of abrasion, therefore compromising the aesthetics of your project.
Abrasive Blasting requires the most skill out of all of our options; It involves using a machine that propelles a coarse particle medium at a very high speed at the line markings. The 2 most common techniques to use with this method are shot and sand blasting. Both involve using small steel or sand particles (respectively) to blast away line markings.