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Solution made with recycled PET brings sustainability and comfort into the home, by bringing to walls, ceilings, and roofs a material used in thermal and acoustic insulation, noise control, and reduction of heat entry in dry construction systems.
Discarded PET bottles have taken on a technical role in civil construction by being transformed into PET wool, a blanket applied as thermal and acoustic insulation in walls, ceilings, floors, and coverings of residential, commercial, and corporate properties.
Produced with polyester fibers obtained from the recycling of PET packaging, the material can be found in rolls, blankets, boards, and panels, formats chosen according to the intended purpose of the project and the type of construction system adopted.
PET wool in walls, ceilings, and roofs
Within dry construction systems, such as drywall, steel frame, wood frame, plaster ceilings, and sub-roofs, the blanket occupies internal cavities and acts as an additional layer to improve the thermal and acoustic performance of the set.
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When applied in light walls, the PET wool is installed between sheets or layers of the system, helping to reduce the propagation of noise between environments when there is adequate sealing, correct thickness, and careful execution.
In ceilings and roofs, the use of the blanket can hinder the transmission of heat to the interior of the property, especially in areas that receive direct heating from the roof for much of the day.
Even so, the result does not depend solely on the choice of the blanket, as the composition of the wall, floor, or ceiling, the density of the product, the applied thickness, and the absence of gaps influence the final performance.
Recycled plastic becomes construction input
The main difference compared to conventional solutions is in the origin of the raw material, as plastic packaging that could be discarded returns to the production chain as a component aimed at thermal and acoustic comfort.
In January 2026, Trisoft reported having reached the milestone of 6.4 billion PET bottles reused in solutions related to environmental comfort, a number presented by the company as a result of its industrial activity.
According to the company, this reuse incorporates recycled PET into the manufacturing of materials used in civil construction, interior design, and in corporate, commercial, educational, residential, and industrial environments.
This movement connects to the circular economy, a concept in which waste returns to the production cycle in new applications, provided it undergoes proper processing and has use defined by technical criteria.
Applications beyond hidden insulation
The Portal Acústica describes PET wool as a thermoacoustic insulation blanket made of polyester fibers, without the addition of resins, used in panels, rolls, and other configurations depending on the application.
Among the cited uses are filling drywall walls, installation over ceiling systems, application under subfloors, and apparent use in coverings aimed at acoustic treatment.
In internal acoustic projects, the material can also appear in panels, acoustic clouds, and ceiling baffles, resources used to control reverberation and improve sound quality within the environment itself.
In these applications, the proposal is not to completely block external sound, but to adjust the sound behavior in restaurants, offices, clinics, schools, auditoriums, studios, and other collective use spaces.
Humidity, fungi, and material stability
Besides the recycled origin, PET wool is presented by Portal Acústica as moisture resistant, with protection against fungus formation and prevention of microorganism proliferation.
The same source informs that the material does not suffer deformation or deterioration over time, preserving its characteristics when used according to the conditions indicated for each application.
These properties help explain the interest in internal uses, where comfort, hygiene, maintenance, and material stability need to be evaluated before choosing thermoacoustic insulation.
On the other hand, specification requires attention to manufacturer data, usage indication, fire behavior, dimensions, density, thickness, and compatibility with the construction system.
Performance depends on correct installation
Treating PET wool as a unique solution for any heat or noise problem can lead to incorrect expectations, because hollow doors, poorly sealed windows, gaps, and assembly failures compromise the result.
In walls, floors, and coverings, the final efficiency arises from the combination of blanket, rigid layers, seals, air cavities, thickness of the set, and quality of the execution done on site.
For larger areas and continuous fillings, rollers may better suit the project, while plates and panels are often chosen when the application requires rigidity, specific finish, or appropriate density.
In comparison with mineral wools, the choice also needs to consider technical criteria, as PET wool, glass wool, and rock wool have different compositions, although they are used for similar purposes of thermal and acoustic insulation.
With recycled PET as a base, the solution expands the alternatives for projects seeking internal comfort and waste reuse, provided that the purchase and installation follow specifications compatible with the desired performance.
