Projected polyurethane insulation has excellent properties: it is an economical, popular, versatile material widely used in homes (houses and flats), industrial buildings and sectors such as construction for the benefits it provides.
Therefore, it is not necessary to think only about the cost or price of the installation, you also have to evaluate its benefits and the money that you indirectly save in energy efficiency throughout its useful life.
Important fact is that, under normal conditions, when it is used as a thermal or acoustic insulation product (construction sector) it has an average longevity of 50 years (depending on the use that is given, of course).
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How much does the projected polyurethane cost? Price m2
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These are some examples of projected polyurethane m2 prices, only the product, without counting labor, machinery and other costs.
- Foam projected "in situ", density 35 kg / m³, average thickness 30 mm, Euroclass E reaction to fire: € 2.98
- Density 40 kg / m³, average thickness 50 mm, Euroclass E: € 5.10
- Density 40 kg / m³, average thickness 80 mm, Euroclass E: € 6.52
We will mention the aspects that you have to take into account to calculate the projected polyurethane foam price, all of them increase the final cost per square meter (m2).
- Thickness : influences the thermal insulation and is regulated by the CTE according to the climatic zone. In provinces where it is colder they require greater thickness as we can see in the image.
- Density : in spite of the fact that polyurethane is a solution that generates a waterproof foam membrane in the thermal bridge, it allows transpiration to water vapor.
- Behavior before fire : taking into account the use of the construction and its final application (plastered cement, plastering plaster, metal cover, etc.) you have to project polyurethane of one kind or another, classified in Euroclasses.
- Surface condition : the thermal insulation of polyurethane requires that the receiving surface is prepared, clean and without moisture, otherwise it will have to be treated and the price will increase.
- Indirect costs : here comes everything that has nothing to do with the material itself, ie, labor, difficulty of execution and necessary means (scaffolding, lifting cranes, etc).
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Steps for the projected polyurethane
If you do not know how to project polyurethane by yourself, the first thing you should know is that this job requires in most cases a qualified professional and company with an applicator stamp, we do not recommend applying the insulation yourself.
The first thing is to have an individual protection equipment for access to work: helmet, diver and very important, mask for organic gases.
- A polyurethane projecting machine in which you control the power, the flow, the pressure, and that you can plug into an external power outlet.
- Review the manufacturer's product quality sheet.
- Protect all elements susceptible to being stained by the insulation product.
- Check that the surface on which it is going to be applied is in good condition: consistent, dry, clean and free of obstacles.
- Otherwise, it should be reviewed for possible breakage, cracks, holes, lack of mortar between pieces, etc.
- To control the conditions of temperature of the substrate (superior to 5 ºC) and humidity of the atmosphere (inferior to 80%) for an optimum application.
- The projected polyurethane is carried out with a previous primer on which it will be applied in successive layers of about two centimeters of maximum thickness until achieving the desired thickness.
On old supports, it is advisable to carry out adhesion tests.
- The application performance of polyurethane foam is about 100 square meters per hour.
- The applicator will collect thickness measurements of the entire surface with a graduated punch no more than 2 millimeters thick.
- The work carried out according to the current regulations will be measured.
- In case the projected polyurethane is exposed to the weather (6 months - 1 year), it should be protected from direct solar radiation to prevent its degradation.
Applications of projected polyurethane insulation
Let's see at a quick glance the most common constructive solutions where polyurethane sprayed insulation is applied.
- Insulate interior facade: when you do not want to touch the exterior facade because it is made of stone or brick, you can do the rehabilitation from within.
- Isolate the facade exterior (SATE system or ventilated façade): this is the best method since you effectively protect all the sites where the cold of the street comes in (fissures, cracks) and waterproof the façade.
- In old buildings whose facade is formed by two brick partitions with an air chamber in the middle, empty, this can be filled with projected polyurethane.
projected polyurethane facades
- Terrace floors: just apply the polyurethane insulation layer and protect it with the desired finish. The cheapest is to paint, but you can put on tile or other materials.
- Before the projection of the polyurethane check that the surface (tape, asphalt cloth, etc) is in good condition, otherwise remove it to avoid problems.
- Waterproofing flat and inclined roofs: the roofs can be insulated, as well as the facades, both inside and outside under roof tiles.