Lime painting: properties, advantages, disadvantages

You hesitate to apply lime paint at home? This healthy coating resulting from the crushing of limestone baked at ultra high temperature has a beautiful effect which gives both rusticity, luminosity and warmth to your walls. For exterior or interior application, lime paint is easy to apply and has many advantages, including allowing your walls to breathe naturally while being protected from moisture. Let’s take stock of its properties, advantages and disadvantages.

Lime paint: what is it? What properties?

Lime painting is a very old technique already used during antiquity. This paint contains quicklime, itself composed of limestone baked at 1200 ° C, extinguished and then crushed. Naturally white, lime is tinted to adorn walls and meet decorative desires with the addition of chrome, iron, copper oxide or cobalt.

Lime paint has the particularity of lightening as it dries. Consequently, to obtain the desired shade definitively, it is often necessary to reapply several successive coats, equivalent to a greater quantity of product than for conventional paints.

The different types of lime paint

There are two types of lime paint: air paint and hydraulic paint.

  • Air lime paint is used as a decorative paint indoors or outdoors.
  • Hydraulic lime painting is reserved for protective coatings, especially outdoors thanks to its high resistance to climatic hazards.

The different lime paint preparations

Lime paint can be prepared in different ways:

  • Liming : this preparation with a high lime content gives a rustic effect and is preferred for painting facades.
  • Whitewash : more diluted, this lime formula gives a nice satin effect and can allow a sanded finish with the addition of sand.
  • Tempera : even more diluted, it is used for painting frescoes.
  • Patina : very diluted, it serves to standardize the facades to give them an old appearance.
  • The plaster : applied with a float, the plaster is used as a finishing plaster or a protective coating in kitchens and bathrooms.

What are the advantages of lime paint?

Lime painting is a painting method with multiple advantages:

  • Aesthetic painting : lime paint is now available in a multitude of colors obtained thanks to natural pigments. Something to delight all desires.
  • A versatile paint : Lime paint is not only a decorative finishing product, it also serves as a cement mortar and plaster for plastering.
  • An easy-to-apply paint : flexible, even elastic, lime paint is pleasant to apply and without any prior treatment.
  • Healthy painting : lime paint is devoid of VOCs (volatile organic compounds).
  • A resistant paint : lime paint is very resistant and durable.
  • Breathable paint : its permeability is ideal for allowing your walls to breathe and naturally evacuate the moisture present, which avoids the risk of mold.
  • Waterproof paint : if it allows air to pass through, lime paint slows down the humidity that cannot penetrate your walls.
  • Comfortable and economical paint : also capable of controlling the humidity of a room, it helps to significantly reduce energy expenditure to heat the interior.
  • An insulating paint : this coating is naturally thermal and sound insulating. In addition, by adding flax or hemp to it, these properties are maximized.
  • Flame retardant paint : lime is naturally fire resistant.

What are the disadvantages of lime paint?

Despite its undeniable advantages, lime paint has certain drawbacks:

  • A paint whose color fades as it dries : as we have said, the tinted lime paint becomes lighter as it dries. As a result, multiple coats must be applied to achieve the desired color.
  • A messy paint : lime paint being porous, it gets dirty quickly. However, it is also easy to clean.
  • A complex painting to prepare : the preparation of the lime paint is very precise. If not prepared properly, it turns to flour and can mold over time.
  • An allergenic paint : for some people, lime paint can be allergenic. So be careful when handling it.