When it comes to sloping a flat roof for proper drainage in Auckland, there are a few methods that roofing professionals commonly employ. Here are some techniques used to achieve effective roof slope:

  1. Tapered Insulation: One common approach is to use tapered insulation, which involves installing multiple layers of insulation with varying thicknesses. These layers are strategically placed to create a slope, allowing water to flow towards designated drainage points. Tapered insulation systems are designed to provide consistent slope and promote efficient water runoff.
  1. Crickets or Saddle Construction: In areas where roof penetrations or equipment exist, crickets or saddles are constructed. These are sloped structures built adjacent to the obstruction, diverting water away from it. Crickets can be made using different materials, such as plywood or metal, and are designed to effectively redirect water towards drainage systems.
  1. Built-Up Roofing (BUR) Systems: Built-up roofing systems often incorporate multiple layers of roofing materials, including bitumen or asphalt, reinforced with felts or fabrics. During installation, roofers can adjust the number of layers or the application thickness to create a gradual slope for drainage. This method requires expertise in properly layering and tapering the roofing materials.
  1. Roof Coatings: Applying roof coatings specifically designed for sloping purposes can help improve drainage on a flat roof. These coatings are applied in multiple layers, with each layer slightly thicker at one end to create a gentle slope. Roof coatings not only provide slope but also offer additional protection against UV rays and water infiltration.

It’s crucial to consult with a professional roofing contractor in Auckland to determine the most suitable method for sloping your specific flat roof. They will assess factors such as the roof’s structure, existing materials, and local building regulations to recommend the best approach for achieving proper drainage. Proper slope design and installation are essential to prevent water pooling and ensure the long-term durability and performance of your roof.