Três tipos de telhado verde

Summary

In this video from Arte Nativamente, the topic of green roofs is explored, focusing on three main types: intensive, extensive, and light green roofs. These roofs offer benefits like improved thermal and acoustic comfort, but each type varies in structure, weight, and maintenance needs. The video explains how substrate depth affects roof weight and the necessary structural support. It emphasizes the importance of regular maintenance, especially in the early years, and concludes with a step-by-step guide for building a light green roof. Viewers also get a free downloadable booklet about bioconstruction techniques.

Takeaways

• 😀 Green roofs provide acoustic and thermal comfort to buildings, improving overall environmental performance.
• 🌱 The three types of green roofs are: intensive, extensive, and light green roofs, each with different substrate amounts and structural needs.
• 🏗️ The structure of a green roof is crucial as it must support the weight of the substrate, plants, and rainwater, requiring proper design and technical expertise.
• 🛠️ Maintenance of green roofs is important, especially during the first few years when plants are adapting. Regular care ensures healthy growth and reduces future maintenance needs.
• 💡 Intensive green roofs are the most robust, requiring 20 to 60 cm of substrate and supporting a wide range of plants, even allowing human traffic. These roofs are the most expensive.
• 💰 Extensive green roofs are a cost-effective middle ground, with a thinner substrate layer (5-15 cm) and suitable for smaller, low-lying plants. They require moderate maintenance.
• 🌾 Light green roofs are the most budget-friendly option, using straw as the main substrate. They need regular straw replacement, especially in the early years, and support small plants.
• 🌻 The intensive green roof requires the most investment due to its larger substrate depth, stronger structure, and complex waterproofing and drainage systems.
• 🌿 Extensive green roofs are a great alternative for cost-conscious individuals who still want the benefits of a green roof, as they balance cost and maintenance.
• 🌾 Light green roofs are ideal for those with limited budgets but still want a green roof. However, they require more frequent maintenance, especially with straw replacement in the first few years.

Q & A

What is a green roof, and what are its primary benefits?

A green roof is a type of roof covering that provides various benefits, primarily improving acoustic and thermal comfort for a building. It also helps with insulation and can contribute to energy efficiency.

What are the three types of green roofs discussed in the video?

The three types of green roofs discussed are intensive, extensive, and light green roofs. They are classified based on the amount of substrate they contain, which impacts the weight and structure requirements.

How does the amount of substrate in a green roof affect its structure?

The amount of substrate determines the weight of the green roof, which in turn affects the structure that needs to support it. A more robust structure is required for roofs with thicker substrates.

Why is it important to have a technical manager when designing a green roof?

A technical manager is crucial for ensuring the correct structural calculations are made to support the weight of the green roof. Proper design and waterproofing layers are essential for the roof’s functionality and durability.

What is the maintenance requirement for green roofs, and how does it vary by type?

All green roofs require maintenance, especially in the first few years while the plants are adapting. Maintenance involves tasks like irrigation, pruning, and replacing the straw for light green roofs. Intensive green roofs require less maintenance due to their more established vegetation and thicker substrate.

What makes light green roofs the most affordable option?

Light green roofs are the most affordable because they have a less robust structure and mainly consist of straw as the substrate, which makes them lighter and cheaper to build and maintain.

What are the key characteristics of an intensive green roof?

Intensive green roofs have a substrate layer between 20 and 60 cm thick, which supports medium to large plants. These roofs are heavier, require a more robust structure, and involve more maintenance, such as irrigation and pruning.

What type of plants are best suited for an extensive green roof?

Extensive green roofs are best suited for small, low-lying plants with shallow roots. These roofs have a thinner substrate layer (5 to 15 cm) and support a lighter load, making them ideal for smaller, less invasive plant species.

How does a light green roof compare in terms of weight and maintenance?

A light green roof is lighter than both extensive and intensive green roofs due to its minimal substrate, consisting mostly of straw. However, it requires more frequent maintenance, particularly the replacement of straw and care for the plants.

What are the steps involved in creating a light green roof as described in the video?

The process includes creating a structure to support the substrate, installing protective membranes (like geomembranes and bidim), laying a dense layer of straw, and then adding small pots with fertilized soil for plant growth. The maintenance involves replacing the straw and caring for the plants.