Designing Integral Gutter: Concealed or Hidden Gutter

Introduction:

In this blog post, we will focus on the design of integral gutters also known as concealed or hidden gutters, providing valuable insights and key considerations to ensure successful implementation. Collaborating with roofing product manufacturers, performing roof drainage calculations, and adhering to local building codes are just some of the factors that architects need to keep in mind. Read on to discover the essential aspects of designing integral gutters.

• Determining the Width and Depth of the Gutter:

  To accommodate varying roof areas and slopes, the width and depth of the concealed gutter must be carefully determined. Understanding the relationship between these factors and the water flow is essential. For roofs with a larger surface area or steeper slopes, wider and deeper gutters may be required to accommodate increased water flow. Consider consulting local building codes and regulations for specific requirements in your area.

• Spacing and Number of Downspouts:

  Proper roof drainage calculations will determine the spacing and number of downspouts or drainpipes required for effective water management. Ensuring that the slope of the integral gutter parallels the roof eave is crucial, and the outlet locations must be strategically determined based on the gutter's depth and minimum slope requirements. The high point of your gutter’s slope must meet the minimum required depth of the gutter. Local rainfall intensity and building codes should also be taken into consideration.

• Detailing Downspouts:

  There are three primary methods for detailing downspouts in integral gutter systems.

  Add visible scupper outlet and downspout to the façade.

  Integrate a downspout into the cladding zone while keeping it externally hidden

  Integrate the drainage pipes internally using a series of scupper drains

• Insulation Thickness:

  Maintaining continuous insulation throughout the building is essential for energy efficiency and preventing thermal bridging. To achieve this, it is recommended to have a minimum of 2 inches of insulation on the interior side of the gutter.

• Using Heat Tracer Cables:

  In colder climates, preventing ice dams and ensuring proper drainage is crucial. Heat tracer cables can be installed along the concealed gutter system to keep the water flowing and prevent blockages caused by freezing. Architects should ensure compatibility with the roofing material and follow the manufacturer's guidelines for installation.

• Non-Penetrating Attachment of Heat Tracer Cables:

  To avoid potential water leakage points, it is crucial to avoid mechanical fasteners when attaching heat tracer cables. Opt for non-penetrating methods such as adhesive clips or purpose-designed straps to secure the cables in place. Ensure the chosen attachment method is secure and does not compromise the integrity of the concealed gutter system.

• Other considerations:

  It is also important to ensure that downspouts or internal drainage pipes have suitable access for maintenance, including leaf clearing and possible leaks. When taking pipe work internally, it is especially necessary to consider thermal bridging and sound transfer and the fact that more internal space could be required to conceal exposed piping.

Conclusion:

Designing an integral gutter system requires careful consideration of various factors, from the width and depth of the gutter to the placement of downspouts, insulation thickness, and the incorporation of heat tracer cables. By following these key points and consulting local building codes and regulations, architects can bridge the knowledge gap and create efficient, aesthetically pleasing, and long-lasting integral gutter systems.

Designing integral gutters requires a comprehensive understanding of various factors, ranging from roof drainage calculations to insulation and heat tracing considerations.By collaborating with roofing product manufacturers and adhering to local building codes, architects can design functional and aesthetically pleasing integral gutter systems that meet the specific needs of each project.

Written by D.TO: Design TOgether

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