How you can waterproof a steel shed

While steel sheds are incredibly durable, they may not be classed as energy efficient.

The roof on a metal shed will absorb the heat from the sun, in turn, causing the shed’s interior to heat up. Waterproofing a metal shed lowers the surface temperature of the roof and reduces the cooling costs.

If you fail to waterproof any metal roof, moisture will be allowed to seep under the roof and cause internal corrosion. Waterproof a metal roof a few months after installing the roof to protect it and reduce energy costs.

What you’ll need

  • Acrylic latex roof coating
  • Clean towel
  • Metal primer
  • Roller brush
  • Screwdriver
  • Seam tape

What to do

First, you will need to sweep the roof with a push broom to remove dirt and debris, then water the roof down with a garden hose.

Use the screwdriver to tighten or refasten any loose screws on the roof. Dry the roof thoroughly with a clean towel. If there are any cracks on the roof, larger than 1/8 of an inch, caulk them with trowel-grade coating.

Next, apply seam tape all over the horizontal and vertical seams, cracks, joints, flashings, vents and anywhere else two surfaces meet. The tape gives extra protection and reinforcement to the metal roof. Apply two coats of metal primer to the entire roof with a roller brush and allow each coat to dry completely.

Lastly, paint the entire roof with a coat of acrylic latex roof coating, using the roller brush.