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Mastic roofing: nostalgia or still relevant?

Mastic roofing, once a popular choice for flat roofs between 1920 and 1970, now poses significant challenges due to its aging nature, potential environmental hazards, and poor insulation properties. In this blog post, we'll explore how to identify mastic roofs, understand their drawbacks, and discuss why replacing them with modern materials might be essential for a safer, more sustainable home.

When we inspect homes at Homekeur BV, we regularly encounter old roofs with a unique type of roofing: mastic . This classic roof finish evokes nostalgia for many, but also raises questions. What exactly is mastic, how do you recognize it, and is it still suitable for the future? In this blog post, we'll take you on a journey into the world of mastic roofing.

Characteristics of mastic

A mastic layer is usually black and appears quite robust. It has a somewhat bumpy, cracked, or fissured texture. Sometimes you see that multiple layers have been applied over the years. Mastic can often be recognized by:

  • A thick, grainy texture

  • Small cracks or tears

  • Weathered or crumbly areas

  • A bituminous smell in warm weather

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