How to restore plaster with mortar (lime and cement) || Do it yourself ... if you can скачать в хорошем качестве

How to restore plaster with mortar (lime and cement) || Do it yourself ... if you can

Hello to all of you Sunday geeks !! Welcome to the series "Do it yourself ... if you can", the series dedicated to weekend chores. In this video I show you how to make a plaster shoot using a bastard mortar. Sometimes it may happen that you have to do a "patch" of the plaster and you have some sand, lime and cement at your disposal, or you have half a bag of pre-mixed masonry mortar left over from the last job done. No problem! EQUIPMENT trowel Mortarboard Aluminum profile Plaster scraper (optional) PREPARE THE SURFACE First we have to prepare the base by removing all the friable, damaged or detached parts. Once this is done, the surface must be swept well and all the dust removed, especially along the junction point between the old and the new plaster, to prevent the mortar from adhering to the substrate. At this point it is good to check that the surface is not too dry or too wet. How? A ladle of mortar is applied to the point that seems driest e if after a few seconds it has hardened and comes off easily it means that it is too dry, then we must moisten the area with a brush or sponge. if the mortar tends to slide down and does not harden even after several minutes it means that it is too wet, then it is better to wait for it to dry a little. PREPARE THE MORTAR If you use a premixed mortar it is very simple, it is mixed by hand or with an electric mixer adding water until the desired consistency is reached (all the information necessary for use is shown on each bag). If, on the other hand, we want to make the mortar with our hands we must mix well sand, lime, cement and water. In this case the ratios are about: 10 parts sand 3 parts lime 1 part concrete 3 parts water (this depends on the consistency we want and the humidity of the sand) PLASTER The first thing to do is to apply the mortar along the perimeter of the area to be restored by taking the mortar on the back of the ladle and pressing it firmly into the corner with the tip. This serves to make the old adhere well to the new, in fact, if this work is not done correctly there is a risk that a crack will form along the joint. Now we are ready for the actual plaster! Holding the ladle as shown in the video, take the mortar with the side of the trowel and with a rotation of the forearm and wrist towards the wall we literally launch the ladle towards the wall. The entire space is filled up to a thickness greater than the existing plaster, so that it can be leveled with the profile. The line is passed from the bottom upwards, trying to keep it perpendicular to the wall and swinging left and right as in the video. Now all we have to do is fill in the empty spaces and repeat the operation until the surface is homogeneous. Well now if you want you can use the screed to finish the plaster before shaving (excuse the pun.