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How To Replace Roof Fan

What Is The Best Rv Roof Sealant

How to Replace Air Vent Attic Fan Motor

The best sealant to use depends on the roof surface and the application. For EPDM, TPO and aluminum roofs, the recommended material is M-1 sealant .

If youre sealing around a roof vent or skylight, industry experts recommend using SB-140 butyl caulking .

For resealing RV windows, the experts again suggest M-1 sealant, but Duralink is also used and has excellent adhesion to glass.

If you are sealing around irregular surfaces, the best sealant to use is WebSeal tape.

It has a unique, woven fabric backing with microsealant composition so that it bonds perfectly on flat surfaces as well as around curves, angles, bolts and pipes.

Its also highly weather resistant, and remains flexible even in climates with temperatures as low as negative 70 degrees Fahrenheit.

Recommended Reading: How Do I Remove Moss From My Roof

Rv Roof Vent Fan Replacement

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Weve talked before about the importance of a working RV roof vent fan, and we recently posted about the best options for roof vent fan replacement.

Todays post more specifically addresses the actual replacement itself the DIY steps to take to successfully replace your RV roof vent fan, should you need to do so.

Lets get to it!

  • 4)Why is a Working RV Vent Fan Important?
  • Hide The Wires With The Garnish Ring

    Now that all of the wires are connected you can replace the light and put the garnish ring on the fan.

    Garnish rings that come with vents and fans usually need to be cut to fit the shape and thickness of your RV roof.

    Make sure you follow the instructions that came with the fan you purchased to cut it properly.

    You may also be able to use the garnish ring that was on the vent you replaced.

    The garnish ring hides the roof beams and the wires.

    If you ran your wires on the outside of the ceiling you can still put them on the inside of the garnish ring. Just have them poking out of the outside edge.

    Once the garnish ring is on you now have a 12 volt powered RV fan installed in place of a non powered RV roof vent.

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    Fasten The Attic Fan To Roof

    Once you are satisfied with the fit, it’s time to fasten the attic fan to the roof. Beforehand, it is a good idea to apply a bead of exterior caulking to the underside of the attic fan.

    You may also want to fasten the thermostat or junction box to the rafter first if you have poor access in the attic.

    Once you have placed the attic fan in its proper position, it is time to install a few screws or roofing nails onto the attic fan flashing.

    Read Also: What Are The Best Solar Powered Attic Fans?

    Preparing To Replace The Fan

    7 Smart and low
  • 1Check if a permit is necessary. Call up your local city or county government and ask if you’re allowed to do home electrical work by yourself. In some cases, you may need a special permit, or the work may have to be done by a licensed contractor.XResearch source
  • Even if you feel like you can handle the work yourself, you should still see if a permit is necessary. Doing the work without a permit, if one is required, might violate your homeowner’s policy.
  • 2Double-check the type of fan you currently have. Many bathroom fans are hard-wired through your ceiling or attic. Some, however, have a standard electrical plug that feeds into a regular outlet. You’ll want to replace your fan with one of the same type. If you aren’t sure which kind you have, pop off the fan’s cover and inspect how it is powered.Advertisement
  • 3Select your new fan. Take a trip down to your local home supply store, and you should be able to find several models of bathroom fans. Look for one with a low âsoneâ number , and a high âCFMâ number.XResearch source
  • Sones measure the loudness of a fan. The lower the number, the quieter the fan.
  • CFMs measure the number of cubic feet of air a fan can move out of a room per minute. Generally, the higher the number, the better.
  • High CFM fans may not be necessary for small bathrooms. If your bathroom is large, however, you’ll really want to get a fan with a high CFM rating.
  • Wire connectors
  • Recommended Reading: What Is The Best Insulation For A Metal Roof

    How Much Does It Cost To Install An Attic Fan

    Attic fans range differently depending on what kind of the Attic fan you are installing, you can expect to pay between $350 to $1,000 installed. The pricing varies based on the type of Attic fan, the sizing requirements,and the motor type.

    If you are a true do-it-yourselfer you can skip the installation cost and pay for the cost of the fan itself which ranges from $100-$400. QuietCool provides great video resources for customers who wish to install their fan themselves.

    Attic fans are a wise investment because without an Attic fans, yourattic can get up to 150ºF – 160ºF during the summer. These temperature extremes can ruin the structure of your home and cause high energy bills. Attic fans cool, ventilate and exhaust your attic only.

    Attic fans pull air from the outside through existing roof vents in your attic. This allows your attic to stay within 5-10ºF of the outside temperature atall times when the fan is running. This process of cooling and ventilating your attic allows your home to stay cooler, longer because it is no longer working against your A/C. The climate in which you live is the main factor in how much youwill save off your cooling costs but you can save up to 30% off your a/c cooling cost.

    Engage Your Battery Disconnect Switch Or Remove Negative Cable From Your Rv Battery

    Before working on any wiring in your RV, youll want to either engage your RVs 12V battery disconnect switch or remove the negative cable from your RVs house battery bank.

    Your new RV vent fan runs on 12V power, and so youll need a 12V power source to wire your new fan. The existing wiring for the old 12V roof vent fan should work perfectly.

    Also Check: How To Choose Roof Color

    Where To Install Attic Fan

    • Post published:May 27, 2022

    You’ve decided to install an attic fan because it helps reduce your electricity bills, and it can also boost the comfort of your living space. However, your concern is where’s the ideal place to install it and how? Well, worry no more! We’ve done in-depth research and have some answers to share.

    Ideally, you can install an attic fan on the roof between the rafters or the gable wall of your attic area. Furthermore, you can install attic fans into an existing vent, such as a box vent and attic power vent, so that’s something to consider.

    Keep on reading as we dive right in on the steps of how to install your attic fan properly. We will also tackle the right size for an attic fan and how to install one, so keep reading!

    Spring: The Season For Attic Improvements

    Replacing an Attic Fan – Do It Yourself

    Why do experts recommend booking attic fan services during the spring?

    Spring is an excellent time to complete home renovations or other improvement projects for the following reasons:

    • Spring weather is temperateyou wont have to complete the process in sweltering heat or the frigid cold.
    • Spring provides homeowners ample time to complete tasks that can help prepare them for the upcoming summer months and prevent any mishaps.
    • In early to mid-spring, young children will likely still be in school, which makes it more convenient for attic professionals in your service area to complete your attic fan installation while your kids are out of the house.
    • Spring has fewer major holidays than the fall and winter, giving you more flexible deadlines for completing home improvement projects.

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    Where Do We Come In

    Depending on your comfort and experience level, you might want to avoid any DIY and simply hire a roofing professional for your necessary projects. Thats where Carlson Projects Inc. comes in! When it comes to Lincoln, NE roofing, we are your trusted experts. Whether youre looking for a new roof, a roof repair, or wondering how to install a roof vent, we love what we do and were ready to help!

    If you need to install a brand new roof vent, check out our blog How to Install a Roof Vent. And if youre considering home remodeling in Lincoln, NE, we handle that, too! Take a look at our blog 4 Reasons to Remodel an Old Home Instead of Buying New.


    The First Steps In The Attic Fan Replacement Process

    When youre ready to repair, replace, or install an attic fan, how can you start the process?

    First, determine whether youre going to complete the work yourself or hire attic professionals. Installing or replacing an attic fan is easier said than done. We recommend hiring experts to help you since installation requires significant structural work.

    If you choose to hire attic specialists, collect as many quotes as you can. We recommend gathering at least three estimates. But, before choosing a contractor, consider more than just the price of the work:

    • Do all of the providers offer turnkey service? Will they prepare your attic, install the fan, and clean up before closing out the job, or will you have to prepare and clean up yourself?
    • Which provider has the best reviews? If youre having a hard time finding references, ask a representative for referrals from past clients.
    • During free consultations, were you particularly impressed with the know-how, expediency, or courtesy of one of the providers?

    The power is in your handswhile an attic fan replacement service cost may be a concern, choose the professional you think will produce the highest quality work.

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    When Should You Replace Roof Vents

    Most of the time, the roof air vent system functions well and does not need too much maintenance, but it also needs replacing if it has been in place for more than ten years.

    The one most common problem with roof vents that call for replacement is leakage of water which is notable by:

    • Staining on the ceiling or water dripping down the roof vent.
    • Sudden unregulated temperature, e.g., too much heat or too much cold, has to be stabilized using air conditioning.
    • Ice pooling on the roof means that the attic is not properly vented.

    Extreme climatic conditions cause the leakage. Too much sun and cold can damage the roof vents leading to leakage and ultimately retarding others.

    Remove The Old Vent On The Rv Roof

    Installing a Whole

    Next, you are going to need to remove the old vent. Theres going to be a lot of sealant covering the screw heads and the corners of the vent.

    Take off the old sealant first using a scraper. Make sure you dont damage the roof fabric when youre doing this.

    It takes some time but its possible to remove the sealant without hurting the roofs membrane. I like to use a plastic scraper for this part.

    Once the old sealant is removed and the screw heads are exposed you can use a drill and the right size of Robertson drill bit to unscrew them.

    Make sure you save the screws because you can use them to secure the new fan to the roof.

    The vent will also be secured to the RV roof with butyl tape. You are going to need to pry up the vent with a scraper.

    Again make sure you are careful not to damage any of the fabric on the RV roof.

    Once the old roof vent is removed the old sealant still left on the roof needs to be cleaned off as much as possible.

    Its ok if theres a little left since its almost impossible to get everything off without damaging the roof fabric but you dont want any large pieces left.

    Lastly, wash the area around the hole on the roof so no dirt or oils get between the new sealant and roof fabric.

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    Stay Ahead On Maintenance

    We cannot overstate the importance of preventative maintenance. Regularly checking your RVs roof for damage and cracking seals is the best way to notice small changes that may occur over time. Note that the warranty on your roof may depend on having your RV inspected annually and evidence that youve been doing preventative maintenance.

    Maintaining your RV roof seals is important to prevent a leak and serious damage. The seam where the rubber roof met the sidewalls allowed water to seep underneath, doing extensive damage to the substructure.

    Cracks and sun damage to your RVs seals can potentially allow water into your RV. Leaks can often go unnoticed until significant damage has occurred. Water sitting in your RVs ceiling and walls can cause mold to grow, leading to potential health issues for anyone regularly spending time inside the RV. Of course water penetration left unchecked over a long period of time can lead to serious structural damage and rot.

    We inspect the roof of our RV about once a month. We recommend that you regularly inspect your RVs roof as well and that you dont put off even the most minor repairs. Tending to minor wear or damage as it occurs may be easy and inexpensive. But delaying regular DIY maintenance and repairs can lead to extensive damage and very expensive professional repairs.

    Our best advice: Stay on top of your RV roof! ????

    But if you havent you can check out our video about how to repair holes in an RV roof:

    Pencil The Attic Fan Outline

    Grab the paper template that came with the attic fan.

    If an install template didn’t come with it, you can make your own by penciling the outline of the fan onto cardboard.

    Place the template on to the screw so that it is perfect centered. Now pencil around the template onto the shingles — so now you have a perfect outline of the attic fan.

    Read Also: What Are The Best Rated Gable Attic Fans?

    Read Also: Is It Ok To Put Metal Roof Over Shingles

    How Many Watts Does A Large Rv Fan Like A Max Air Or Fan

    Even though they are much larger than the traditional RV fans that many of us are used to, the larger fans still dont use a ton of electricity.

    On low many of these fans will only use around 6 watts and around 50 to 60 watts at the max settings.

    If you have multiple fans running at the same time and you are using your RV batteries the watt usage can really start to add up throughout the day.

    Make sure you are monitoring your RVs power usage so you know how long you can run the RV fans on battery power.

    Getting a solar panel that can charge an RV battery like one of the ones in this article will help keep your batteries charged so you can run your 12 volt RV appliances for longer without having to use a generator.

    Remove The Old Rv Roof Vent Fan

    Attic fan replacement- no roof work!

    Start by removing the interior vent frame.

    Start by unscrewing the vent frame from inside the RV. Then head up onto the roof and remove all of the old roof sealants. If your RV has a rubber roof, use a plastic putty knife and be careful not to damage the rubber membrane as youre removing the old sealant. If youve got a fiberglass or metal roof, you can use a regular metal putty knife.

    After removing all of the screws around the perimeter of the vent fan, carefully remove all of the old sealants from the roof.

    Remove the screws that are securing the vent to the roof. Be sure to get them all therell be a lot of them. A cordless drill similar to this one that we have is excellent for jobs like this.

    Price & availability info updated 2022-06-22 at 11:47.

    Remove the old fan and any old butyl tape that might be left behind.

    Nows a good time to place your new vent into the opening to make sure it fits properly before going any further. Remove the vent to continue prepping the area for installation. There should be no problem here, as RVs have pretty universal 14 x 14 openings for fans .

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    Extend The Life Of Your Building Materials

    Moisture can significantly decrease the integrity of your attics structural materials. If your attic is too moist, you could experience:

    • Mold growth When water droplets condense and settle on the surfaces in your atticframing lumber, roof decking, HVAC ducts, and insulationthe moisture combined with warm spring or summer temperatures can prompt mold growth. Mold inhalation isnt just detrimental to your healthit can weaken or eat away at the materials holding your home together.
    • Wood rot Moisture and lumber dont get along well. While your framing lumber is likely treated to prevent moisture infiltration, consistent exposure to a humid environment can accelerate the rotting process, decimating your framing lumber and leading to costly repairs.
    • Cracking In the winter months, condensation can settle on your attic surfaces and freeze when temperatures are low. When water freezes, it expands, potentially causing cracks in wood, metal, or concrete.3

    If youre worried about your potential attic fan replacement cost, consider the expense if you let moist air in your attic run its courseroofing materials, framing lumber, and mold removal are costly.

    Removing The Old Lap Sealant

    Lap sealant is a special kind of caulking, and the self-leveling type creates a puddle, ensuring a smooth, even seal . It must be removed before the existing RV roof vent fan can be taken out. This part took us about an hour the first time, and just 30 minutes the second time.

    The easiest way to do this is apply heat and then peel it back. Using a heat gun, about 2 inches above the sealant, apply heat slowly and evenly to a section of the sealant. Turn off the heat gun and set it safely aside. Dont let the metal end touch anything as it is very hot.

    Heating up sealant and exposing screws

    Now, you can start to roll the sealant back with your fingers. Bear in mind, the sealant is also quite hot, and it may need to cool a little before you can handle it.

    Using your fingers, you can pull the sealant up, but ensure that the roofing material underneath doesnt get stretched. Using two hands, you can peel up the old sealant and push down the roofing material underneath.

    Work your way around the entire fan, heating it a little, and peel it up to the edge of the receiving flange. You can tear these pieces off as needed and put them into the grocery bag to throw away later.

    Its neat to see the color difference between your exposed roof and the super white parts that were protected by the sealant. That shows you how good this stuff works!

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