Plaster with perlite: a light solution for warm walls

Plaster mixed with perlite is a great way to create warm and inviting walls. To provide durability and insulation, this special plaster blend blends conventional plaster with perlite, a lightweight volcanic material. It’s a great option if you want to increase the thermal efficiency of your walls without sacrificing portability or ease of use.

One notable feature of perlite plaster is that it can increase insulation without significantly increasing weight. This can be especially helpful for projects where keeping the structure lightweight is essential. Additionally, it aids in controlling interior temperature, improving the comfort of your living areas all year round.

We’ll look at the advantages of perlite plaster in this post, including how it can make your walls warmer and more energy-efficient. In order to help you get the most out of this cutting-edge material for your next plastering project, we’ll also go over some helpful application tips.

Feature Description
What is Perlite? Perlite is a volcanic glass that is heated and expanded to create lightweight particles used in plaster.
Benefits Perlite plaster is lightweight, provides excellent insulation, and improves energy efficiency.
Applications Ideal for internal wall plastering, especially in environments where insulation is crucial.
Installation Apply in a similar manner to traditional plaster, but ensure proper mixing and application techniques to avoid issues.
Durability Perlite plaster is durable but can be more prone to damage compared to some other types of plaster, so proper care is needed.
Cost Generally more expensive than traditional plaster but offers better insulation benefits.

What is perlite plaster

A mineral with volcanic origins is perlite. Following the eruption, the cooling lava forms obsidian, which when combined with water forms perlite. The porosity of the mineral is relatively high, ranging from 8 to 40%. Its internal structure causes it to break down quickly into granules, which can be black, reddish-brown, white, or green in color depending on the impurities.

Typically, perlite sand—a crushed mineral—is utilized in the country’s economy.

Perlite sand used in construction must completely satisfy GOST 10832-91’s requirements in terms of its characteristics.

The ability of this mineral to expand in volume when heated above 1000ºC is used in the creation of perlite plaster. In comparison to the initial raw material, perlite swells five to twenty times during the reaction and becomes packed with gas bubbles.

The recycled material is light and absorbs sounds that pass through it, making it an excellent heat insulator due to its airiness. It takes the place of regular sand in plaster mixtures; the binder, which is either gypsum or cement, stays the same.

Perlite mortar performs noticeably better than regular mortar in the following ways:

  • Low specific gravity. The building material is easy to transport, the resulting finish will put less load on the supporting structures of the house.
  • High-quality thermal insulation. A 25 mm layer of perlite plaster is equal to half a brick in terms of thermal conductivity.
  • High vapor permeability. The finishing helps to establish a microclimate that is favorable for human health.

See our article for more information on various kinds of warm plasters.

Types

Expanded perlite plaster can be applied to gypsum or cement. Gypsum-perlite mortar should only be used indoors, away from bathrooms and toilets. Cement-perlite mortar can be used to finish exterior walls and interior spaces. Cement mixtures are used more frequently because they work better when applied outside.

There are ready-made dry perlite mixtures for sale, including ExtraGips Iso, Glims Velur, Perel Teplorob, HAGAST, and Quick-mix MPL.

Since they are not frequently available for purchase, artisans typically purchase the required materials themselves and combine a solution using them.

Using perlite in plastering provides a useful and efficient method for building warm, energy-efficient walls. By lowering heat loss, this lightweight material increases insulation and contributes to a comfortable home. You can improve thermal performance in your plaster at a reasonable cost without sacrificing application ease or durability by adding perlite to it.

Do-it-yourself preparation

You will need cement, water, plasticizer, and perlite (sand) for self-preparation. Water-soluble PVA glue is a readily available plasticizer with a mass fraction of no more than 1%. A little extra slaked lime is added to the mixture, which is commonly used.

Step-by-step guidelines for getting ready:

  1. First, lime milk is made. To do this, lime is mixed with water in a large container, for this purpose it is convenient to use cut 200-liter barrels or metal baths. Ratio 1 kg of powder per 10 liters of water. The solution is allowed to stand for 10-12 hours so that all unburned lumps of lime dissolve. The total volume of liquid is calculated so that it is enough to mix the plaster the next working day.
  2. A plasticizer is added to the lime mortar: PVA glue or dishwashing detergent – 1% of the estimated mass of cement.
  3. Cement-perelitic mixture is prepared. The proportions are: cement – 1 part, sand – 1, perlite – 5.
  4. For mixing the solution, a standard 280-liter concrete mixer is suitable. Loading proportions: 4 sands of sand, 4 cements, 4 lime and 20 perlite.
  5. After the first kneading, the solution is allowed to stand for 15 minutes and mix it again.

T.To. Perlit is so light that he can shoot out of a concrete mixer like a pear until he gets wet. Use horizontal forced mixers if at all possible.

Another option is to use a standard construction mixer with a large painting capacity to prepare the mixture.

The amount of water used in the initial kneading should be carefully measured, as there is not much of a difference between "densely" and "Zhdiko." Plastic is generally the answer and is a pleasant material to work with.

A workable way to create warm, energy-efficient walls is to use plaster mixed with perlite. It is easier to work with due to its lightweight design, and its insulating qualities help maintain comfortable indoor temperatures all year round.

This kind of plaster increases the longevity of your walls in addition to improving thermal performance. Perlite gives your surface a smoother finish that improves your space’s appearance and functionality.

All things considered, plaster with perlite is a great option for anyone wishing to increase wall insulation without adding weight. It’s a wise purchase for furnishing a comfortable and energy-conserving home.

Video on the topic

Perlite solution The whole process

MPL Lightweight cement-lime plaster with perlite from quick-mix

WARM SOLUTION WITH PERLITE for home insulation with your own hands clearly

Recipe for homemade perlite plaster

Perlite Warm plaster PERLITE

What type of plaster do you prefer to use in your projects?
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Andrey Ivanov

An experienced builder with more than 15 years of experience. I specialize in plastering and decorative finishing. I started my career as an ordinary worker, gradually accumulating knowledge and skills in various finishing techniques. Now I share my experience to help beginners master the craft and avoid common mistakes.

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