Proper Roof Ventilation Is Essential To Prevent Moisture In Your Attic This Can Lead To Mould Build
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
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Putting In Ridge Vents
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
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
Installation process:
How To Know Whether Your Roof Needs To Be Ventilated
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
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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