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Architecture

Acoustic isolation: what is it and how to implement it in your house?

Discover how sound insulation transforms projects into calm and comfortable havens

By CASACOR Publisher

Submitted at Feb 28, 2025, 7:00 AM

08 min de leitura
Sidney Quintela Project.

Sidney Quintela Project. (Manuel Sá)

Living in an urban projects filled with sounds can make acoustic insulation an essential factor in decoration and architecture. In addition to ensuring comfort and privacy, good acoustic treatment provides tranquility, helping to reduce daily stress. Knowing how to reduce unwanted noise at home or in an apartment is crucial for creating a more welcoming and conducive projects for rest and well-being.
At the top of the mountain, the country house has a spectacular view of nature. Project by Rafael Ramos. In the photo, living room with glass wall, armchair and sofa.

Project by Rafael Ramos. (Augusto Ferreira/CASACOR)

What is acoustic insulation?


Acoustic insulation is crucial for ensuring more well-being and sleep quality, especially for those living near busy streets or avenues. In apartments, where neighbors share walls and ceilings, it provides a serene projects, reducing unwanted noises and avoiding noise-related conflicts. Concerning single-story houses, insulation prevents external sounds, such as traffic, from disturbing the peace of the home. This type of care in the construction and decoration of spaces is one of the fundamental elements to ensure peace and comfort, whether in urban or rural projects.
Augusto Senna Home office of the Architect CASACOR Bahia 2022 office table picture chair shelf

Augusto Senna - Home office of the Architect. In an area of 18 m², the professional created the personalization of a common area of the house, making the projects suitable for a healthy, cozy, and inspiring work environment. With a focus on concentration, the projects has appropriate acoustic treatment and comfortable lighting. The details in yellow highlight and reveal much about the architect's personality and preferences. (Gabriela Daltro/CASACOR)

Best materials for acoustic insulation


Choosing the right materials is essential for efficient acoustic insulation. Glass wool and rock wool panels are widely used due to their ability to absorb and dampen sounds. Additionally, the use of cork and acoustic foams significantly contributes to reducing noise. Double-glazed windows and rubber seals on door and window frames are also effective resources for preventing noise from entering, keeping the interior silent and protecting privacy. More rustic and heavy coverings, such as bricks and stones, also create an additional layer in the sealing to prevent sound passage.
David Bastos designs an apartment in Switzerland filled with signed design. In the photo, living room with glass wall, sofa, and bench.

(Foto: Tuca Reines / Produção visual: Armazém de Arquitectura/CASACOR)

Techniques without renovation


For those living in rented properties, where renovations are limited, there are practical solutions for reducing noise. Adding thick rugs and heavy curtains can help muffle them. The bookshelves and pictures on the walls act as effective sound barriers. Installing door seals, as well as applying removable acoustic stickers on the windows, are measures that also contribute significantly to isolating external noises or sounds from different projects. These techniques do not require major renovations, allowing the space to remain comfortable without altering its structure.
A sober palette and indirect lighting give gallery vibes to a 320 m² apartment. Project by David Bastos. In the photo, living room with dark curtains, carpet, and paintings.

(Fran Parente/CASACOR)

Tips to improve acoustic insulation


  • Acoustic doors: Replacing regular doors with acoustic doors can make a significant difference. They have a denser material that helps block sound, especially in bedrooms and offices.

  • Ceiling insulation: If you live in an apartment and want to reduce sound coming from above, consider installing acoustic insulation panels on the ceiling or using PVC ceilings, which help absorb sound impact.

  • Sealing baseboards and gaps: Small spaces, such as gaps in baseboards and around doors, can be significant villains in acoustic insulation. Placing seals in these areas helps reduce the passage of unwanted sounds.

  • Create acoustic barriers with plants: Position plants strategically to block external sounds, especially around windows and doors.
  • Use acoustic mats: In apartments, use acoustic mats under the floor or in the ceiling to diminish sounds coming from the upper floor.
CASACOR Publisher is an exclusive content creator, developed by the CASACOR Technology team based on the knowledge base of casacor.com.br. This text was edited by Yeska Coelho. [abril-veja-tambem]W3sidGl0bGUiOiJDb2JvZ8OzcyBuYSBkZWNvcmHDp8OjbzogY29tbyB1c2FyIGVsZW1lbnRvcyB2YXphZG9zIGNvbSBlc3RpbG8iLCJpbWFnZUxvYWRlZCI6IiIsImxpbmsiOiJodHRwczovL2Nhc2Fjb3IuYWJyaWwuY29tLmJyL3B0LUJSL25vdGljaWFzL2FycXVpdGV0dXJhL2NvYm9nb3MtbmEtZGVjb3JhY2FvLWNvbW8tdXNhci1lbGVtZW50b3MtdmF6YWRvcy1jb20tZXN0aWxvIiwiaGVhZGluZyI6IiIsImhlYWRpbmctbGluayI6IiJ9LHsidGl0bGUiOiJQYWluZWwgcmlwYWRvIHBhcmEgc2FsYTogY29tbyBhcGxpY2FyIGVzc2EgdGVuZMOqbmNpYSBuYSBkZWNvcmHDp8OjbyIsImltYWdlTG9hZGVkIjoiIiwibGluayI6Imh0dHBzOi8vY2FzYWNvci5hYnJpbC5jb20uYnIvcHQtQlIvbm90aWNpYXMvZGVjb3JhY2FvL3BhaW5lbC1yaXBhZG8tcGFyYS1zYWxhLWNvbW8tYXBsaWNhci1lc3NhLXRlbmRlbmNpYS1uYS1kZWNvcmFjYW8iLCJoZWFkaW5nIjoiIiwiaGVhZGluZy1saW5rIjoiIn0seyJ0aXRsZSI6Ik1lemFuaW5vOiBjb21vIGFwcm92ZWl0YXIgbyBww6ktZGlyZWl0byBhbHRvIGUgY3JpYXIgdW0gXCJhbWJpZW50ZSBzdXNwZW5zb1wiIiwiaW1hZ2VMb2FkZWQiOiIiLCJsaW5rIjoiaHR0cHM6Ly9jYXNhY29yLmFicmlsLmNvbS5ici9wdC1CUi9ub3RpY2lhcy9kZWNvcmFjYW8vbWV6YW5pbm8tY29tby1hcHJvdmVpdGFyLW8tcGUtZGlyZWl0by1hbHRvLWUtY3JpYXItdW0tYW1iaWVudGUtc3VzcGVuc28iLCJoZWFkaW5nIjoiIiwiaGVhZGluZy1saW5rIjoiIn1d