Is Your Slope Too Shallow ? Minimum Slope for a Metal Roof (Metric)

• Minimum Slope for Lapped, Non-Sealed Metal Roofs: 25% (25 mm rise for every 100 mm run).
• Minimum Slope for Lapped, Sealed Metal Roofs: 4.2% (4.2 mm rise for every 100 mm run).
• Minimum Slope for Standing Seam Metal Roofs: 2.1% (2.1 mm rise for every 100 mm run).

Equation for Roof Length Based on Slope (Metric)

To calculate the horizontal run (length) based on the vertical rise and slope, use the following equation:

Run=RiseSlope Ratio\text{Run} = \frac{\text{Rise}}{\text{Slope Ratio}}Run=Slope RatioRise

Example 1: 25% Slope (25 mm rise per 100 mm run)

Run=Rise0.25=Rise×4\text{Run} = \frac{\text{Rise}}{0.25} = \text{Rise} \times 4Run=0.25Rise=Rise×4

If the rise is 1 meter (1000 mm):

$$\text{Run}=1000\times 4=4000\text{ mm}=4\text{ meters}$$

Example 2: 2.1% Slope (2.1 mm rise per 100 mm run)

Run=Rise0.021=Rise×47.62\text{Run} = \frac{\text{Rise}}{0.021} = \text{Rise} \times 47.62Run=0.021Rise=Rise×47.62

If the rise is 1 meter (1000 mm):

$$\text{Run}=1000\times 47.62=47,620\text{ mm}=47.62\text{ meters}$$

These calculations provide the necessary horizontal length of the roof for a given vertical rise, based on the specified slope

Understanding Roof Leak Repair Solutions: Short-Term vs. Long-Term Approaches

When it comes to roof leak repairs, hardware stores often offer a range of products, including fiber-flex reinforced acrylic paint-on solutions. While these are popular for their affordability, they come with a maximum 2-year guarantee and are generally considered a short-term fix. However, there are some significant downsides to using these solutions.

The main issue is the natural expansion and contraction of roof sheets due to temperature changes. Over time, especially in areas with significant temperature fluctuations, this can lead to the acrylic coating cracking. Additionally, hail damage can quickly render these coatings ineffective and non-warrantable, leaving homeowners without coverage.

For a more durable solution, our complete strip and replace system addresses these concerns by eliminating the hail vulnerability altogether.

Our system comes with a standard 5-year guarantee, and with proper maintenance, it can last between 5 to 8 years, providing a more reliable and long-lasting solution for roof leak repairs.

Repairing a rusted IBR (Inverted Box Rib) roof involves several steps to ensure the roof is properly restored and protected against future corrosion. Using a rust converter is an effective way to chemically treat the rust before repainting. Here’s the detailed process:

1. Preparation

• Safety First: Wear safety gear, including gloves, goggles, and a mask, to protect yourself from dust, chemicals, and sharp edges.
• Inspect the Roof: Identify all areas affected by rust. This inspection will help determine the extent of the damage and the amount of rust converter and paint needed.

2. Cleaning the Surface

• Remove Loose Rust and Debris: We use a wire brush, scraper, or steel wool to remove loose rust, dirt, and any flaking paint. The goal is to remove as much loose material as possible.
• Wash the Roof: We use a mild detergent and water to wash the roof, removing grease, oil, and other contaminants. A pressure washer can be useful for larger areas.
• Rinse Thoroughly: After washing, we rinse the roof thoroughly with clean water to remove any soap residue. Allow the surface to dry completely.

3. Applying the Rust Converter

• Select a Rust Converter:  We choose a rust converter that’s suitable for your roof material. These products typically contain tannic acid and an organic polymer that chemically react with the rust.
• Application Process:
  • Apply the Rust Converter: Use a brush, roller, or sprayer to apply the rust converter evenly over the rusted areas. Ensure full coverage of all rusted spots.
  • Allow to Dry: The rust converter will typically change the rust color to a dark, inert substance. This process may take anywhere from a few hours to 24 hours, depending on the product and weather conditions.
• Inspect the Surface: After the rust converter has dried, we inspect the surface to ensure all rust has been treated. If any rust spots remain untreated, reapply the converter as needed.

4. Surface Preparation Before Painting

• Sand the Surface: We Lightly sand the converted rust areas and any surrounding bare metal to create a smooth, uniform surface. This helps the primer and paint adhere better.
• Clean the Surface Again: Wipe down the surface with a clean, dry cloth to remove any sanding dust or remaining debris.

5. Priming the Roof

• Apply a Metal Primer: To Use a high-quality metal primer designed for exterior use. The primer will adhere to both the bare metal and the rust converter-treated areas, providing a solid base for the paint.
• First Coat: Applying the first coat of primer evenly across the entire roof surface.
• Allow to Dry: Letting the primer dry completely, following the manufacturer’s recommended drying time.
• Apply a Second Coat: Depending on the condition of the roof and the type of primer, a second coat may be necessary for full coverage.

6. Painting the Roof

• Choose the Right Paint:  We select a high-quality, UV-resistant, and weatherproof paint specifically designed for metal roofs.
• Apply the Paint:
  • First Coat: Applying the first coat of paint using a brush, roller, or sprayer. Ensure even coverage, particularly on seams and overlaps.
  • Drying Time: Allowing the first coat to dry according to the manufacturer’s instructions.
  • Second Coat: Applying a second coat for better protection and a more uniform appearance.
• Final Inspection: Once the paint is fully dry, inspect the roof for any missed spots or areas that may need touch-up.

7. Maintenance

• Regular Inspections: Periodically inspections of the roof for signs of new rust or paint damage. Early detection and treatment can extend the life of the roof.
• Touch-Up as Needed: If any areas begin to show signs of rust or paint deterioration, address them promptly with the same steps.

By following this process, your IBR roof will be effectively repaired and protected from future rust and corrosion, ensuring its longevity.