Prepare your walls before painting

Prepare your walls before painting

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It's time to start the work that you couldn't do this winter. Cracks, irregular walls, filling and smoothing will no longer hold any secrets for you. Give your interior a facelift in the best conditions!

Cracks: repair the walls with a filler

Those who live in the old one, apartment or house, know that the walls move, work. Over time, the cracks reappear. To repair them, here are the steps to follow. - It is first necessary to widen the crack to identify its birth at the level of the wall and so that the coating that will be put after it adheres well. A tip: the dentist's bur makes it possible to carry out work with finesse. - Dust it well and moisten it. - Apply the filling coating with a painter's knife, in thin layers so that it dries quickly and pressing well. - Protect the crack with a calico (stretch fabric) by pushing it into the coating. - Apply a second layer of filling plaster, extending well on both sides of the crack, and a third if necessary. - Sand to level the wall.

Irregular walls: smooth with a smoothing coating

If the walls have imperfections or slight shallow snags, you can apply a smoothing coating. - Proceed with a coating knife and on small surfaces, always from the bottom up. - Spread the coating over 1 mm thick evenly by pressing hard enough. - By holding your knife at an angle, you will avoid ironing several times over the same area. - Smooth with the sharpened part of the knife blade from top to bottom, using a "whiplash" gesture. - Once dry, sand the plaster with fine-grained paper.

Old painting: sand and wash

If the walls are simply dirty or yellowed, they should be washed before repainting. The sanding step can be avoided in some cases. - It is replaced by an abrasive leaching (St Marc type with pine resin) with sponges and gloves. From bottom to top to avoid drips. - It is not replaced if it is repainted with a glycerol paint, frequently used in damp rooms, kitchen and bathroom. In this case it is necessary to sand, see scratching the walls then wash.

For all new paint: apply an undercoat

Called underlayment primer, or primary underlayment or even primer, we often underestimate its usefulness and yet it has everything to please. It is the obligatory preamble to the application of the final layer. - It is a white acrylic paint, cheaper to buy than a decorative paint. - It is particularly recommended to cover a glycerol paint which may require several coats, even with the most efficient paints: count two coats when the manufacturers indicate one. It's gone, your walls are ready: all you have to do is protect yourself to avoid paint stains. Photos to inspire or to dream… Discover "Decorative photos"