The disadvantages of polyurethane foam as insulation

Before you purchase any material, each consumer considers the disadvantages. Polyurethane foam is no exception. About this material, which is otherwise called PPU, each Builder heard today a lot of information.

What material to choose

If you have ever thought about winterizing your home, you probably paid attention to this option as the insulation. Maybe it will be the best decision, because along with the drawbacks it has many advantages.

Description

Polyurethane foam, the disadvantages of which you should know before starting work on warming, is a kind of plastic. The products have a cellular structure. The composition of the polyurethane foam includes a gaseous substance, which is contained in the amount of from 85 to 90%. The whole structure consists of small cells that are well isolated from each other by walls, these cells and filled with gas. The remaining percent of the volume represent a solid part, namely the walls themselves.

The Disadvantages of polyurethane foam as insulation is worth considering. The types of foam used today quite often, the material is popular among consumers as to make it very simple, it can be done directly on the construction site. Two liquid component it is necessary to mix, after they enter into the chemical reaction. If you comply with the necessary proportions of the ingredients, it will be synthesized a polymer which is represented by the hardened foam. If to change a cooking technique, it is possible to obtain polyurethane foams which differ in characteristics from each other. Some of them are suitable for thermal insulation of doors and Windows, while others - for thermal insulation of buildings of reinforced concrete or brick. As for the third species, they are widely used for pipelines. Thus, depending on the proportions of the substances, it is possible to obtain at the output of the polyurethanes, which are composed of many cells of different sizes. Their walls can have different thickness and strength.

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The Main disadvantage of polyurethane foam

Polyurethane foam, the disadvantages of which are presented below, can be used in many areas of construction. However, before purchasing it is important to know about the disadvantages of the material. As the primary acts as the negative impact of sunlight on the surface, which can cause rapid wear of the products. In order to prevent destruction of the insulator, it is necessary to provide protection. You can use plaster, ordinary paint, and all kinds of panel. These are the ways advised by experienced builders.

Disadvantages of foam as insulation of the walls will allow you to understand whether or not to use it. Protective coating can protect the insulation from UV exposure, and will also make the foam more attractive. If we consider the minus, it may be noted that the retention properties of the foam will need more funds than we carry out works on warming involving materials that do not require appropriate protection. In addition, not all handyman are able to produce plaster works, as well as to apply color formulations. In the end, the surface may be even less attractive than before the time of refining.

Additional minus

If you decide to choose polyurethane foam, the disadvantages of which for some consumers can be too impressive, then it is worth considering that the material is insulation, which when exposed to fire starts to smolder. This lack of experts. Despite the fact that polyurethane foam acts as a flame retardant material, it is not able to cope with fire at 100%. According to the classification of the insulation refers to the group of combustibility G-2. This indicates that when exposed to a low temperature of ignition will not occur. The flame extinguished, the process will stop as soon as the surface of the material will be able to cool. If there is a possibility of strong heating or fire risk of a certain area of insulation, in this case, you should not use polyurethane foam.

Why should you choose polyurethane foam for insulating

The Disadvantages of thermal insulation with polyurethane foam, of course, exist. If you decide to make insulation, it is important to consider. If you use the wrong technology in the process of work, it may adversely affect the operational characteristics of the building. In order to avoid this, it is necessary to consider some properties of the described substances. So, foam has a low water vapor permeability - this refers to a rigid variety of material. If applied to the wall structure, when processing of the attic floor or other panels, it will certainly lead to dampness on internal surfaces and in the structure. As consequences we can mention the damp and mildew, but ifthere is a freezing, then supporting elements will be permanently destroyed. This point is often noted in their reviews experienced builders.

The Need for fire protection

If you decide to purchase a polyurethane foam, the disadvantages of customer reviews you have to detail. After all the negative things people have commented in the first place. Thus, it is necessary to be prepared for the fact that over time, the structure will lose its insulating quality, at best they can only fall. This results not only aging, but also temperature extremes and UV exposure. Quite often when insulation works used the method of spraying, it provides protection from exposure to open flame. If you do not want to create additional fire hazard environment, it is necessary to take appropriate security measures. They also become a source of additional expense that does not always satisfy the consumers.

Drawback: the necessity of considering the strength of the structure

Polyurethane foam, disadvantages, reviews of which have been analyzed in the article, requires correct identification of the strength of the structure. This is true in the case when the work involves blowing insulation into the space between the walls. After that, the structure starts to expand, and subsequently, the foam may cause destruction. Not always the owners of private houses have the ability to produce correct calculations.

Why sometimes consumers refuse to use polyurethane

If you decide to use foam, disadvantages, feedback on the material you should be evaluated. So, it is not desirable to use insulation inside the building. This may cause displacement of the dew point in the outer wall in the direction of the room. In this case, the wall begins to freeze, the resulting moisture causes the proliferation of mold, after it begins to rot the wood. In this scenario, the walls remain damp, even in summer, which adversely affects the microclimate in the premises. Experts advise, if it is not possible to use analog materials using polyurethane semi-rigid type. Thus it will be enough layers, the thickness of which is 30 millimeters.