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How To Install Roof Vent

Proper Roof Ventilation Is Essential To Prevent Moisture In Your Attic This Can Lead To Mould Build

How To Install Roof Vents

With the WeatherPRO® Series, you can rest assured that your roof vent promotes proper airflow in your attic space, even in extreme weather. The unique baffle system and flat exterior walls are designed to ward off wind-driven snow and rain, so you can maintain air circulation and steady temperatures in your home year-round.

The plastic design of the WeatherPRO® PRO50 Roof Vent makes it more lightweight, and is easier to install. Below is a step-by-step installation guide to setting up the roof vent for new construction or when re-roofing.

Please note: the installation of Duraflo® WeatherPRO® PRO50 Roof Vent should comply with all local standards and regulations. Before beginning a job, determine how much ventilation is required in both soffit and roof vents, and the appropriate size of vent that would best suit the job. If required, refer to Duraflo® Ventilation Calculator for guidance.

How To Install Bathroom Roof Vent

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You Have Yourself A Van Roof Vent Fan

Now that youve installed your van roof vent fan, you dont have to worry about cutting anymore holes in your van unless you are installing windows. Thats an optional item, though!

Ready for the next step? Its time to install your subfloor into the van!

If you scrolled down here really quickly because you realized there were a lot of steps, you can watch my Maxxair installation instructions in action in my YouTube video!

**This blog post may contain affiliate links, which means I may receive a small commission when you use these links to purchase items at no extra cost to you. Thank you for your support!

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Roof Vent Hood Details

The best exhaust fan venting is through smooth, rigid ducts with taped joints and screwed to a special vent hood. Although this isn’t always possible in attic crawl spaces, you should always insulate the duct to prevent condensation problems. You can find 4-in. duct already wrapped in insulation at home centers. If you’re tempted to vent your exhaust fan through an existing roof vent, or even vent it into the attic, don’t do it. First, you’ll partially block your roof vent with the piping, reducing the flow of cooling air through your attic. Second, during cold winters, you’ll be blowing warm, moist air onto a cold surface . The water will condense and drip into the insulation below and perhaps into the house. Special bathroom fan roof vents with an internal damper that opens only when the fan is blowing will send moist air outdoors and keep cold air out of the house.

Installing Soffit Intake Vents

Roof Vents: Problems and Solutions
  • 1Check around the edges of your attic for any wiring. Go into your attic and look at the area where you plan to install your soffits. Move any insulation around the outer edges and make sure the area is clear of any electrical components or wiring so you can work safely outside with your power tools. If there are wires, find a different spot to install your soffits.XResearch source
  • Drill a hole in the center of where you want your vent while youre in the attic so you know where to saw later.
  • 2Outline a 7 in × 15 in rectangle on your overhang outside. Look for nail lines or seams in the paint since these indicate where a rafter would be in your attic. Use a pencil and a straightedge to draw the rectangle directly onto the bottom of your overhang. This will be where you put the soffit vent.XResearch source
  • Use a tall ladder to reach a taller overhang. Have a partner hold the ladder steady so you can work safely.
  • Make a template using cardboard thats the width of your overhang with a hole the size of the vent cut in it. This way, you can easily trace around it and your vents will be straight.
  • The size of the rectangle will depend on the size of the vents, but a standard size is 8 in × 16 in .
  • 3Drill holes outside in the corners of the rectangle. Use a drill bit large enough so that you can fit your saw blade loosely inside the holes it makes. Drill the holes in all 4 corners of the rectangle to relieve some of the pressure from your saw.XResearch source
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    Putting In Ridge Vents

  • 1Remove the cap shingles from the peak of your roof. The cap shingles are shaped like upside-down Vs and found at the peak of your roof. Get onto your roof using a tall ladder and climb to the top. Pry up the shingles along the top of your roof using a claw hammer. Set them aside so you can use them later instead of throwing them away.XResearch source
  • Be careful on your roof if it has a steep slope.
  • Hire a professional roofing service if youre uncomfortable climbing on the top of your roof.
  • 2Cut a slot going 34 in down from both sides of the peak. Set the depth of a circular saw so it doesnt cut through the rafters in your attic. Push the circular saw in a straight line across the entire peak of your roof to make a slot for your ridge vent. Once youve finished sawing, remove the debris from your roof.XResearch source
  • Ridge vents can go across the entire length of your roof or placed in sections the same length as the vent. Cut the slots according to how you want the vent.
  • 3Set the ridge vents on top of the slot. Use enough vent pieces to fill the length of the slot you cut. Center the vents on the peak of your roof so the sides of the vent lay flat on the roof. If you need to cut the vent to fit at the end of your roof, use a utility knife to make it flush with your home. Hold the vent piece in place until you can nail it down.XResearch source
  • Check your local hardware or home improvement store to see if they have ridge vents available.
  • Reinstall The Lower Shingles

    After drilling the hole, you can position your roof vent in there. But dont install it yet. This is just to mark where youll cut the old shingles.

    The lower shingles have to go under the vent so that the water slides right off of them. Installing the shingles above the vent might cause moisture to build up under the vent and cause leaks.

    You can use a ruler to make sure your measurements will be exact. Or you could also just eyeball it. Use a cutter to mark the width of the vent on the shingles. Just be careful not to cut through other shingles in your roof.

    After cutting the shingles around the size of the vent, you can now use roofing tar or caulk to seal the old nail holes on your roofs underlayment. This stops water from getting into the holes and causing you problems.

    Then, you can now reinstall the shingles you cut. Fasten them with screws or nails. Make sure they are secure.

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    How Many Roof Vents Do I Need

    The bad news is, there isnt a concrete answer to the question how many vents you should install in your roof. The amount of ventilation and by extension number of vents youll need can vary massively, even for houses on the same street. It can change based on the shape of your house, its size, location, positioning, how many people live there and what exactly youre planning on using your roof space for. Approved document F of the Building Regulations provides some insight into what you may require, but this can prove inaccessible to non-professionals. Wed recommend consulting our experienced customer service team, as theyll be able to advise you on the best roof vents for you and their ideal locations. That being said, if youd like to calculate how many roof vents you need yourself, here are two questions youll need to answer:

    Choose The Right Location

    Roof vent installation – How to install box vents for your roof ventilation

    As I said above, the very first step in installing a bathroom fan roof vent is choosing the correct spot for it on your roof.

    Obviously, the best location would be the one that is closest to your bathroom. You will want the roof vent to be as close to your bathroom as possible in order to decrease the number of bends and reduce the length of the duct.

    Another important thing to mention here is that a roof vent should never be too close to roof valleys, chimneys, and other roof vents. Keep it at least two feet away from these spots.

    After finding the right location, its a common practice to take a nail and hammer it through the truss bay or the center of the rafter from the attic. This will allow you to easily locate the spot where your vent will go once youre on the roof you will only have to find the nail sticking out of it.

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    Get Started On Installing Your Vents Today

    As you know, your roof is an enormous investment, which means that youll want to do everything you can to maximize its lifespan. Installing vents is just one of the ways you can further protect your home.

    This is a fairly simple job for those who have experience with roofing projects. However, its usually best to hire a professional. If youre looking for a roofing contractor to get the job done, you can always contact our team of experts here at Legacy Service. Get started on installing your vent today by calling us at 215-798-9790 or filling out a contact form here. Well also take care of the rest of your homes exterior, whether youre looking for installation or replacement for your siding, windows, or doors.

    How To Install Powered Vents

    From inside the attic, your roofing professional will drive a nail about one third of the way down from the ridge between two rafters to mark the desired spot for installation. From the roof, he will cut a hole the same size as the diameter of the vent. As with static and turbine vents, he will then secure the flange under the top-side layer of shingles, lay the flange on top of the bottom shingles and use roofing cement to seal the unit.

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    How To Install An Rv Roof Vent Cover

    If you need to keep the lid of your roof vent open overnight, a vent cover is a great way to protect your RV from moisture and other environmental debris. This process outlines the basic steps for installing a MaxxAir vent cover, one of the more popular models available today.

    The installation process and required tools may vary based on vent cover make and model.

    What youll need:

    • Should come with brackets, nuts, washers, and bolts
  • Drill with drill bit
  • Sharpie or pencil
  • Philips head screwdriver
  • Ratchet or wrench with socket sized for nuts and bolts that came with vent cover
  • Installation process:

  • Center new vent cover over your roof vent.
  • Use a sharpie or pencil to mark the location of the four slots in the covers mounting flange.
  • Remove the vent cover and set it aside.
  • Position brackets so that the slot in the bracket lines up with the marked locations.
  • For maximum strength, brackets should be mounted as close as possible to the outside corner of the roof vent frame.
  • Drill screw holes through the roof vent frame.
  • Place carriage bolt upward through the slot in the brackets and use smaller bolts to secure brackets to the vent frame.
  • A flat washer, lock washer, and hex bolt should be placed on each bolt inside the roof vent frame to secure the brackets.
  • Place the vent cover on the four upward-facing carriage bolts in the mounting bracket slots.
  • Operate the vent to make sure the lid clears the vent cover when being raised and lowered.
  • How To Know Whether Your Roof Needs To Be Ventilated

    How To Install Ridge Vent On Metal Roof

    Heat buildup in the attic is reduced during the summer. That extends shingle life and lowers cooling costs. Warm, wet air seeps into the attic from below in the winter. Vents must release heat and humidity. Ice dams are reduced as a result of this. Here are four indicators of a stagnant or under-ventilated attic:

    • Examine your eaves and roof. If you don’t see any attic vents on the roof or in the eaves, you’ll need to install some. Your roof may have a ridge vent, a low-profile continuous roof air vent that runs along the peak of the roof. It may also contain gable vents, louvered openings at the top of the roofs.
    • On a hot, sunny day, touch the ceiling. According to a heated roof, the attic functions as a solar oven, raising your cooling costs and cooking the shingles.
    • In winter, ridges of ice on your eaves indicate a lack of attic ventilation. Warm air from the rooms below is trapped in the attic as melting snow refreezes on the cold eaves. Snow melts, and water freezes on the chilly eaves, creating ice dams.
    • The warm air that escapes a home’s interior may also carry moisture, which will condense on the rafters or roof sheathing. During the winter, get a flashlight and check your attic. You’ll need improved rooftop ventilation and some attic vents if you discover dampness or ice.

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    Cut The Top Shingles For The Vent Body

    Before sawing or drilling a hole in the roof, youll have to make room for the square vent body, i.e. remove the top section of the shingles.

    For the roof vent body, youll have to remove the middle portion of the shingles. However, the vent bodys flange usually made out of metal has to go underneath the top course of the shingles.

    The thing youll need to do here is to measure both the depth and the width of the roof vent and then cut the top layer of the shingles with a utility knife.

    There is no need to cut the bottom layer of the shingles, though. Thats because the reciprocating saw or the hole saw can go through it quite easily.

    A Note About Bathroom And Kitchen Exhaust Vents

    Bathroom and kitchen exhaust vents are not a type of roofing vent. It should be noted that these vents, which expel warm moist air from the bathroom and food prep areas of the home, need their own ducts and vent hoods, which direct air to the homes exterior. These vents and ducts should never share space with the roof vent, and air should never be vented directly into the attic.

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    When To Call A Professional

    If you plan to install the vent yourself, be sure you’re really up for the challenge. This project requires work on a tall ladder and working atop the roof while using hand and power tools. If you have any anxiety over heights or are not quite sure you know how to handle your tools, consider hiring a professional.

    Be aware that a ridge vent is only one part of properly ventilating your attic space and roof. For a ridge vent to work properly, it relies on passive airflow, or intake air, coming into the attic space via soffit or gable vents or other attic ventilation.

    How To Install A Ridge Vent On A Shingled Roof

    How To Install Roof Vents. Bathroom Fan Vents, Attic Ventilation Etc. -Jonny DIY

    Kelly Bacon is a licensed general contractor with over 40 years of experience in construction, home building and remodeling, and commercial building. He is a member of The Spruce Home Improvement Review Board.

    • Working Time: 1 – 2 hrs
    • Total Time: 2 hrs
    • Skill Level: Advanced
    • Estimated Cost: $2 to $3 per foot

    A very popular way to provide adequate ventilation in an attic space is with a ridge vent, sometimes called a continuous vent. Rather than interrupting the roof line the way other raised vents do, a ridge vent is so low-profile that it is almost unnoticeable.

    There are two primary types of ridge vents: shingle-over vents and aluminum vents. A shingle-over vent is installed over the ridge of a roof and is covered over by asphalt shingle caps that match the surrounding roof shingles. An aluminum ridge vent has a mushroom-shaped profile combined with a wide flange on both sides that sits on top of the roof shingles. This aluminum cap is the finished product and does not require additional asphalt shingle ridge caps. The ridge of the roof is prepared similarly for both types of ridge vents.

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