Warm plaster – rating of manufacturers

The use of warm plaster in buildings is growing in popularity as an energy-efficient construction method. It provides a method for insulating walls without sacrificing surface breathability, which is essential for preventing problems like mold and moisture. But it can be difficult to choose the best product because there are so many manufacturers available.

This post will examine some of the leading producers of warm plaster in more detail. You can get a better idea of what to anticipate in terms of quality, performance, and cost by looking through their offerings.

Knowing the advantages and disadvantages of various warm plaster products will help you, whether you’re a professional builder or a do-it-yourself enthusiast, choose wisely for your upcoming project.

Insulating plaster – what it is?

Now let’s define warm plaster. For a very long time, everyone has been aware that a traditional plaster mixture consists of a cement-sand mortar with a few additional ingredients. The latter may consist of dyes, various polymer adhesives (for improved adhesion), lime (to prevent the walls from becoming wet), or both. However, what is an insulating plaster mixture?

Everything is actually very simple: the standard cement-sand mixture (which may also contain other polymer components) is supplemented with a filler that has a thermal conductivity coefficient that is much lower than that of hardened cement mortar.

Additives of this kind include:

• expanded vermiculite;
• expanded clay;
• volcanic pumice chips;
• wood sawdust;
• polystyrene foam granules.

Warm plaster is essentially the same traditional plaster mixture that has been used for many years to finish buildings and structures, but with the addition of extra low-cost "insulating" elements.

Advantages and disadvantages of warm plasters

The addition of new properties to the standard material results in a plaster that has significant economic benefits due to its long-standing development and cost-effectiveness as a laying technique. And that’s the first real benefit of plaster that insulates against heat.

This material’s ability to regulate the humidity in a space in addition to serving as insulation is its second intriguing feature. Certain elements, like wood sawdust, have the capacity to absorb more moisture from the air and release it when the amount of moisture vapor in the atmosphere is lower. Warm plaster also acts as a great moisture insulator, shielding capital structures from the effects of moisture.

Thirdly, you can easily make the warm plaster mixture on your own; all you need to have on hand are the necessary ingredients.

Let’s quickly go over some more beneficial qualities of warm plasters:

• wear resistance;
• environmental safety and cleanliness;
• resistance to temperature changes;
• due to its high adhesive properties, warm plaster can be applied to almost any surface;
• the array forms a single, integral layer that practically does not need a reinforcing mesh.

To be totally objective, though, it is important to discuss the drawbacks of thermal insulation plasters. Warm plaster loses visibly when compared to specialized insulating materials (like mineral wool), regardless of the type of insulating material it contains. The warm plaster layer needs to be twice as thick to offer the same amount of insulation as a stone wool slab.

Many refer to warm plaster as a "half-solution" because of this. Nevertheless, when considering its financial advantages and ease of use in terms of technology, this kind of solution can frequently be more than adequate.

Varieties by composition

Two varieties of plaster mixtures that insulate against heat exist:

1. Warm cement plaster. This includes all of the above cement-containing mixtures with the specified additives.
2. Foamed plaster. A component is added to the cement-containing mixture that causes foam formation when interacting with water. The structure of the solution in this case will be similar to foam concrete, both in raw and hardened form. This type of plaster has significantly higher heat-insulating properties, but it requires mandatory subsequent processing – painting, since the porous structure, like a sponge, is able to effectively absorb moisture.

It’s critical to understand which manufacturers provide the best value and quality when selecting warm plaster for your house. To assist you in choosing the best warm plaster brand for your building projects, this article will compare and contrast the features, dependability, and general performance of each brand.

Rating of the best manufacturers by the criterion "price-quality"

Let’s look at a few popular brands of heated plaster mixtures:

UMKA® UB-21 TM

In this case, the filler is made of ceramic silicon balls that insulate heat. The warm plaster "Umka" offers excellent sound insulation in addition to low thermal conductivity and high heat conservation because of the porous structure of the filler. Furthermore, the low specific gravity of this type of plaster allows it to be securely adhered to the capital structure’s surface even in the absence of a reinforcing mesh.

PALADIUM Palaplaster-207

This particular sand-cement mixture includes foam glass, a porous but long-lasting filler in the form of granules, as a heat-insulating component. It is completely "indifferent" to fire, does not encourage the absorption of moisture vapor from the air, and most significantly, it increases the capital structure’s surface’s ability to insulate against heat and sound.

De Luxe "TEPLOLUX"

The plaster mixture is designed to be applied onto foam concrete blocks or a concrete base; on these surfaces, the composition exhibits the highest level of adhesion. This plaster mix’s property makes sense because it contains 3-millimeter granules of the same foam concrete, which is used as plaster insulation in the mixture.

UNIS TEPLON

This is a plaster made of gypsum. Compared to cement mass, gypsum is far less thermally conductive. However, perlite granules, also known as volcanic glass, are added to this mixture in order to improve the thermal insulation properties.

HAGAst AuBenputzPerlit FS-402

In addition to cement, perlite is added to this plaster mixture to achieve excellent sound and heat insulation. The mixture is primarily intended for use as a surface finish on aerated and foam concrete.

Knauf Grűnband

Expanded polystyrene granules, with a maximum fraction of 1.5 millimeters, are used as an insulating filler in this thermal plaster. Furthermore, the mixture’s polymer components lessen the dried mass’s dispersion and keep polystyrene granules from coming into contact with the atmosphere’s moist vapors.

Where is plaster used to insulate walls?

External and interior capital structures can be completed with thermally insulating plaster. Let’s look at a few characteristics of its two application formats.

Interior work

Plaster is typically applied in a thin layer to finish interior surfaces in buildings. Furthermore, plastering walls to insulate them from the inside will stop the internal heat from the house from seeping into the walls itself—this has nothing to do with wanting to preserve the usable volume of the space.

The precise location of the so-called dew point is significant in this case. Where on the building’s wall does the temperature drop to the point where the moisture in the air condenses? It is clear that the capital wall will erode if this point—or rather, the entire plane—is inside the array because water is widely distributed and can seep into all of the pores and microcracks in cement arrays and concrete. It is not possible to let these vapors directly enter the wall and turn into liquid, which could then freeze.

In the past, this was accomplished by overheating homes, which resulted in significant energy losses (homes heated the street like enormous heaters). The amount of heat used has now drastically dropped, and external concrete array layers can be left "unarmed" against the effects of moisture and cold by plastering over internal wall insulation. Although warm plaster is used to insulate walls from the inside, it is primarily used to soundproof rooms. Its layer in this instance shouldn’t be more than 30-35 mm.

For instance, insulating residential buildings from the inside is prohibited by law in Sweden (on the scale of private apartments).

External

However, heat-insulating plaster is a highly popular finishing plaster for facades. In this case, the layer is typically 100 mm in length and never less than 50 mm.

There are two primary nuances in this respect:

1. Such a mass of plaster must be laid on a reinforcing mesh.
2. Dried plaster on top must be painted to prevent the absorption of atmospheric moisture by heat-insulating, but at the same time dispersed granules and materials.

How to calculate mixture consumption?

The plaster mixture’s consumption rate expressed in terms of one square meter of finished surface is typically stated on the plaster mixture’s packaging by each manufacturer. However, regardless of the component composition, you should consider the average consumption rate if the plastering mixture is made separately:

When diluted with water, 25 kilograms of ready-made dry mix should be sufficient to apply a 15 mm layer of thermal plaster to 1-1.4 m2 of wall surface.

Application technology

Applying traditional plaster is not any different from applying a layer of warm plaster. There are three steps to the process.

Preparatory stage

The surface needs to be prepared right from the start. It must be free of any debris, chips, or peeling, and all of the cracks must be filled with putty. Applying a primer layer will improve the wall’s adhesive qualities, so it would be beneficial.

Preparing the mixture

Since each mixture calls for a different amount of water to be mixed, it is highly advised to read the instructions (found on the package) before opening it. Furthermore, after being diluted with water, some mixtures crystallize quickly, so you should be aware of how much time you have for the entire plastering process.

The principle of applying building material

Plaster is applied to the wall in layers, each no thicker than 20 mm. To give the final layer time to set, in this instance, each new layer is applied no sooner than four hours after the previous layer is laid.

How to make warm plaster with your own hands?

One benefit of the material in question is that it can be made by hand into warm plaster for exterior or interior finishing projects. Let’s look at a few possibilities for mixing a plaster mixture that will provide thermal insulation:

Using perlite in a plaster mixture:

• 1 part cement;
• 1 part sand;
• 4-5 parts perlite.

Using PVA glue is OK as long as it accounts for no more than 1% of the total volume.

Combination with plasticizers:

• 1 part cement;
• 2 parts sand;
• 4 parts vermiculite (volcanic glass, which plays the role of thermal insulation filler in the mixture);
• 50 g. PVA glue per bucket of cement (10 kg).

Water needs to be added in both situations until the mixture reaches the desired consistency.

Useful tips and recommendations

It is crucial to follow the temperature regime when applying the plaster mixture. Warm plaster has a lower adhesive content than traditional plaster because it contains a large amount of filler.

Additionally, you must be mindful of:

• the atmospheric temperature at which the work is carried out;
• the wall temperature;
• the temperature of the plaster mixture itself.

The best scenario would be for the mixture’s temperature to be no more than 10 °C above the combined temperature of the ambient air and the surface of the wall that is being finished.

The specific gravity of the mixture used to make warm plaster is lower than that of traditional plaster. As a result, you only need to use reinforcing mesh if the finishing coating is applied in a relatively thick layer (more than 40 mm). Additionally, you should level the applied mixture in relation to pre-set beacons if the wall is plastered without a mesh.

Manufacturer	Rating
Kreisel	Highly rated for quality and durability
Knauf	Popular choice, good thermal insulation
Ceresit	Reliable performance, widely trusted
Baumit	Well-regarded, long-lasting finish
Terraco	Good balance of price and quality

Your home’s comfort and energy efficiency can both be greatly impacted by your choice of warm plaster. There are many options available on the market, each with pros and cons of their own. It is possible to make sure that your investment will offer the required durability and insulation by choosing a reputable manufacturer with care.

There is a warm plaster option that meets your needs, regardless of your priorities: affordability, thermal performance, or simplicity of application. It’s critical to evaluate the benefits and drawbacks of every product and brand, taking into account elements like your region’s climate and the particular needs of your construction project.

In the end, selecting a product that meets your expectations and installing it correctly are the keys to a successful application. You can improve the overall living environment and your building’s thermal qualities with the correct warm plaster.

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