How To Install Vents on a Metal Roof

Ventilation is very important in a home. Without proper ventilation, your home will either be uncomfortably hot or freezing cold with the changing of seasons. Proper maintenance of vents in your roof must be done annually before the weather in your area goes onward to wintertime. Installing vents on your roof can be tricky, especially if your roof is made of metal. Here are some tips for your guidance.

  • You will need these materials:  tape measure, marker, skill saw, screwdriver, drill, screws, tar, tar brush and prefab vents.
  • Decide what kind of vents you want to install on your roof. Various types of vents are: slatted vents (attached on the triangle or A shaped section of the roof edge), round vents (the so-called whirlybird) that are mounted on top of the roof to enable air to freely circulate on the beam area. These types of vents are available in prefabricated form in hardware and construction supply stores. Your choice will depend on the design of your house. If the roof of your house is sharply angled, then an A-type vent is more appropriate. Meanwhile if your roof is flat or circular, the whirlybird type is a better option.
  • Get the roof area ready. Mend any holes or cracks. Close in gaps along the roof ridge and make sure everything is fastened in place.
  • Determine where to place the vents and with the use of a chalk or marker, mark the areas where you will mount them. Measure the length of the roof area if you are going to place the vents on top. Meanwhile, if you will place the vents on the roof ridge (the A-shaped section), measure the whole stretch from the center of the apex to the bottom. Mark the middle portion and that is the very spot where you should place your vent.
  • Make sure the vents are in proper proportion with the expanse of your roof and size of your house. A large home may require a single large circular vent, or two or more smaller circular vents, depending on your choice. If you are using two vents, keep equal distances between them to keep a uniform ventilation system.
  • Make a pattern to follow when you cut the roof. Measure the diameter of the circular vent and the length and width of the A-type vents and follow the same measurements on the patterns.
  • Bore holes on the roof for the vents to fit in so they have better access on the interior part of the roof. Use a skill saw with this job.
  • Brush the sides of the hole with tar. The tar will allow easier sealing later on when the vents are already mounted.
  • Position the vents and mount them on the holes. Secure them with screws.
  • Seal the vents with more tar after they have been mounted on the roof. Brush more tar underneath. Paint the sides with the same color as the roof.

The number one concern in installing vents on a metal roof is the condition of the roof. If it is old and creaky, do not install the vents. Repair the roof first and put it back to sound state before attempting to set up vents or any kind of fixtures for that matter. 


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