How do you slope a flat roof for drainage in Denver?

How do you slope a flat roof for drainage in Denver?

Flat roofs in Denver are considered a common architectural feature because of their modern aesthetics and suitability for the region’s climate. Most commercial properties get flat roofs due to larger square footage buildings.

Flat roofs in Denver are designed with proper drainage systems that assist in dealing with weather conditions, heavy snowfall, and intense sunlight in summer. You might witness your roof puddles, rotting framework, or leak stains on walls or ceilings. In this blog, we’ll explore more about the slope of a flat roof for drainage in Denver.

Flat Roof Drainage

Flat Roof Drainage

For proper drainage in Denver, the building requires a minimum two percent slope or a one-fourth unit vertical for every 12 units horizontal. In simpler words, there is a need for a slope on a flat roof having one-fourth of an inch for every 12 inches. You need help to identify the slope easily; you might notice when there is rainfall or water that might indicate a proper slope.

This slope helps in a proper water drainage system that meets all building codes for any roofing application. While working with a roofing contractor in Denver, you can ensure that all building needs are catered properly. Get a longer life for your roof, keeping all occupants safe and reducing the number of repairs for the roofing system.

Importance of Proper Flat Roof Sloping

Importance of Proper Flat Roof Sloping

The slope of a flat roof remains crucial in preventing water from accumulating on its surface. During the winter, snow accumulation requires a proper slope to ensure that it directly drains towards gutters. Proper Slope Design is required for:

  • Prevents Ponding: – Ponding might appear when the water collects and stands on a flat roof. With time, Ponding might lead to structural damage and leaks.
  • Enhances Durability: – Proper Drainage extends the lifespan of roofing material by preventing water-related wear and tear.
  • Improves Insulation: – Effective slope designs assist in preventing heat loss by permitting proper water runoff and installation of Insulation.

Flat Roof Drainage Systems

Flat Roof Drainage Systems

You should know about the exact drainage system of the roof. It involves a step-by-step guide that determines the slope of a flat roof effective for drainage in Denver.

Analyse Roof’s Current State

Start evaluating the present condition of the flat roof by simply identifying low spots or areas where most of the water accumulates.

Check for the Required Slope

In Denver, a Flat roof typically ranges from ¼ inch to ½ inch of slope per foot. However, this zmight depend on the building and the area on which the slope is required.

Installation of Tapered Insulation

Tapered insulations are becoming the popular choice for homeowners who want a flat roof. These boards generally remain thicker on one side and gradually thin out, which helps in proper drainage of water. You can install them directly on the available roof deck.

Consider Crickets

For larger flat roofs or areas having extensive Ponding, you need to install crickets. These crickets are generally triangular structures that work in diverting water from the low areas towards the drains.

Consult Professionals

The proper slope of a flat roof for drainage in Denver remains a complex work for most homeowners. It requires proper planning and expert advice through which a sloping roof can be decided. Consulting professional roofing contractors in Denver resolves all issues, and they can perform the work without any struggle.

Regular Maintenance

Sloping of the roof requires maintenance and inspection to avoid any future expenses related to repair. If you avoid maintenance of the roof, then it might lead to water-related issues and affect the integrity of the roofing system. In order to improve the lifespan of the roof, you have to consider Denver’s ever-changing weather conditions.


You should proactively take the required steps for proper slopping of a flat roof. It is required to check to prevent any water damage and accumulation of snow on the flat roof.

Excel Construction Group professional can help you in maintaining a flat roof drainage system for your roof. You can contact us for a better flat roof system at (844) 601-ROOF (7663) for a free roof inspection and learn more about what a flat roof doesn’t havehow to fix standing water on the flat roof, and how to slope a flat roof for drainage in Denver.

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