Its my position that you should have a proper ventilation system in your attic and that you should always take the time to air seal the floor of the attic (sealing off the living space from the non-conditioned attic space), but in cases where you dont (or arent able to), I want to offer some information and direction. Will two gables and a roof vent be sufficient. I ran into an excessive amount of ice damming this year with my property. Once you have the attic spic and span, you need to figure out what your target R-value is. The key is having plenty of INTAKE air coming in lower, typically via the soffits. If your attic is warm and warms the bottom of a cold roofline, you can create condensation with the right conditions so I would caution you against this. Problem 1: Insulation often clogs the space between the rafters, blocking air from traveling to and from the soffit area. I I have eaves but am not sure if they can soffitted or we should add low gable vent. I will eventually insulate under the roof deck as well as insulate and air-seal the attic floor. I cover how AtticFoil can help with ice damming on this page: How SuperPerf Helps Prevent Ice Dams on Your Roof Hope those resources are helpful to you! Ridge Vent vs. Attic Fan: Which Do You Need? Please HELP!! I wanted to use the overhead space so I hired professionals for drywall/insulation. Most people have plenty of exhaust vents but not nearly enough *intake* vents. The results? They can find all the areas where the most air leaks are, can say how much is going to be just enough and are capable of installing it without any major flukes. I have a shed roof over top of my garage, the slope is 2/12. A dry, well-ventilated attic prevents mold from developing both inside the attic and in the living areas below. Use this guide to learn why you need attic venting and how to improve it. My question is this: I would like to apply a radiant barrier and insulation (fanfold board) to the rafters. Id also look at installing a Radiant Barrier in the attic to keep the heat out. Essentially bring air through the high interior ceiling and pass it through the attic with gable vent outtake? Best of all, Atlas ventilation products are eligible components of the Atlas Signature Select Roofing . If you go this route, you will need additional vents to allow the air to get OUT (I recommend you use static vents for this purpose). It is able to conform more easily than batt insulation and thus, can get into areas that other types of insulation normally could not. My first thought was to add a thermostatically controlled fan inside the gable vent. However, I have to ask why youre adding r-value board to the rafters? More info that here: Proper Attic Ventilation. This is hands-down one of the most simple but effective ways to save energy and stop moisture problems in the attic air seal that floor as best as you can! We are in Houston, so often hot and humid weather. I asked a lot of questions and I was never actually shown if my house HAS any soffit vents! Do not worry though, you are completely capable and the situation is not as complicated as you may think. Attic ventilation is one of the key factors to helping keep your utility bills in check during hot weather, and to preventing issues such as mold growth and ice dam formation in the winter. Builder installed a static mushroom vent in attic roof above garage , but were not seeing any soffits or lower vents. Short of me removing all the wonderful soffit work I did, is there anything I can do? However, there is no daylight through the soffit vents when I look through them from inside the attic (with attic lights off). I have a split level home with a gable roof. Dont close off the ridge you want your attic to be COLD. Ed, I have a 45 year old cedar shake roof that I will be replacing soon. When it reaches its dew point it will change from vapor to condensation. Ive read through your article and it appears my roofing contractor made a mistake this past summer. If a gable vent seems like too big of a commitment or undertaking, consider smaller eyebrow vents that are mounted low on the roof slow so they can act as intake vents. BEST WHOLE HOUSE FAN: QuietCool 2465 CFM Classic Advanced Whole House Fan. Required fields are marked *. I had recently got my garage insulated. Mary ice damming has to do with having a relatively warm roof (usually from leaking warm air out of the attic floor) and so the solution is to have a super cold roof. https://www.radiantbarrierguru.com/attic-ventilation-basic-tips/. I have been in my attic and never noticed any condensation or moisture. The name is nice, isnt it? Not interested in making a masterpiece of an old attic! They work much like a box fan placed in a window on a hot summer day. 900 sq. Here is a video showing this type product. Be patient and be thorough and you will have another DIY project done! The next winter, it was humid in the attic, so fan was on, furnace turned on, and hot water heater was heating. Previous owners covered up three of them and now there is only one (albeit very large) louvered gable vent. Thanks! In a nutshell, yes, soffit vents prevent moisture from doing bad things to your home. I have a cross-gable roof. If you have plenty of intake into the attic (usually via soffit vents), then your ridge vent should work well. From this position, air enters the attic through the intake vents. No, I dont think the lack of vented air is the problem here its the radiant heat coming in from the roof and it having a pretty direct route to get right into the room. The standard intake vent for attics is a soffit vent (also sometimes referred to as an eave vent) and it allows for air to enter the attic down low, near the eaves. 2018 international residential code (Irc) | icc digital codes. If you have a finished attic or an attic space that you are planning on finishing, then wall gable vents and roof vents aren't the best option. Once you have decided the type of insulation that you will be using, you want to rid your attic of any old existing insulation or make sure that what is there is working. I own an older home that does not have eaves ventilation and would be very difficult to have this ventilation added. When night falls, the melted snow freezes and can create an ice dam on the roof and in the gutter system, which can lead to leaks, mold growth, and ice damage. Basically, its a slot cut in the deck a couple feet up from the drip edge that will act like soffit vents an allow air to get into the attic. Another point: we are about to put in a new roof, so I wonder if some type of intake installed with the new roof would be better? Powered attic vents, also known as powered attic ventilators or attic power vents, are electric-propelled fans that help pull stale air out of an attic space. Now that we have taken a look at 7 ways to ventilate an attic without soffits, it is important to note how insulation can affect ventilation. This can be a great solution for small spaces that dont have secondary ventilation systems. However, having more intake vents can help too. It should be ok, even though this is untraditional (insulating a non-conditioned space with r-value). Theeaves stick out about 1.5 feet wide. The only air inlet (since no soffit vents) is a couple of gable vents. Weve had several roofers out for suggestions and so far none have worked. Bill, I would discuss these issues with your roofer and ask them what options you have with the new roof. Seal up the gable vents and install a ridge vent. Evaluate Your Homes Target R-Value and Begin the Insulation Process. Hi Ed, My home is English Tudor styled and has no overhang/soffit. If this is happening, your ventilation systems will then be working against you as they will pull all that warm air straight out of the attic and into the winter air. Also, leave the ridge vent exposed and leave about a foot uncovered (no barrier or board) the whole length of the roof where the roof meets the soffit so air can circulate between the rafters. Do you need ventilation in order for radiant barrier to work? Loose insulation is used for those really pesky areas that are hard to cover. Ventilating attic spaces can help regulate temperatures in your living spaces. By adding adequate ventilation, a homeowner can control the humidity under their roof, and the perforations in a soffit vent are perfect for this purpose. We are moving quickly to replace the 1950s Balsam Wool insulation (maybe R2 value) with new fiberglass and heat shield foil on attic floor and then replacing the three-tab roof with GAF architectural shingles, probably black. I have mild growing probably from before the roof was installed. I had not heard of the single fan before as a solution. By adding adequate ventilation, a homeowner can control the humidity under their roof, and the perforations in a soffit vent are perfect for this purpose. A venting drip edge is actually pretty easy to install as well and very often, only takes a little bit of grappling with your roof to get the job done. (n.d.). Options include using a metal screen wire to create a barrier outside the vent, investing in flexible roof sealant to fill any holes or gaps around the vent, and replacing nearby flashing and shingling to prevent rain water from seeping through worn or damaged parts of the roof. Air enters low and then escapes out of the attic higher up near the peak of the roof, usually via a ridge vent, an attic fan (which we do not recommend), static roof vents, or a high-mounted gable vent/fan. Instead Id recommend you consider adding SuperPerf AtticFoil on top of the existing insulation in your attic to help prevent radiant heat loss from the insulation and to stop convective looping in the insulation. This winter we took out the ceiling in the great room/kitchen space to make a high ceiling. There are no soffit vents, so Im not sure what the intake design was; air seemed to just pass through from end to end. Without a continuous flow of outside air, the attic heat in the winter will melt ice and snow at the top of the roof, which will flow down and refreeze when it reaches the cooler bottom of the roof. After this, get the measurements for your attic and get to buying. Remember, you want more entry points at the perimeter (bottom) edge of the roof than you want at the exit points at the top of the roof. Intake air is critical to maintaining a proper flow of air throughout the attic space. Instead, plan on ventilating the finished attic space with rafter venting. Use a passive system and you wont have issues with sucking air out of your home (or chimney). I have a 1950s cape cod. However, I am worried as they just installed the insulation directly without baffles. To my surprise, the soffit had no venting. Whats surprising is that there is evidence of moisture (drips probably from snow melt coming in on roofing nails) but there was barely any mold in the attic to the surprise of roofing contractors, remediators and others weve had do work in the home. Attic Fan: What Are the Pros and Cons of Installing One? We have a 1940s Mansard roof with NO soffits. Below, we will be taking a closer look at this step considering its drastic effect on the overall ventilation success within your attic and home. If this is the case. See what I mean here? The attic space has a fire wall in it so it doesnt make sense to put gable vents on opposite sides of the building. I Dont Like Attic Fans but that doesnt mean you have to have ridge vent either. You should have an equal amount of intake and exhaust ventilation, equally about one square foot for every 150 square feet of attic space. The guideline drops to 1 ft for every 300 ft with a vapor barrier. A passive ventilation system should have air inlets at the base of the roof, usually in the soffits, and outlets in the peak or gables. I added about (20) 3 diameter vents, then installed vented soffit covers. Attic Fan Ventilation Attic fans are intended to cool hot attics by drawing in cooler outside air from attic vents (soffit and gable) and pushing hot air to the outside. Problem 2: Aluminum or vinyl soffits (eaves) installed over plywood soffits that don't have venting holes. The attic has a wood floor and minimal insulation. The attic floor is also insulated. One wants to add the ridge vent. So, if your attic is 20' x 40' then the area is 800 square feet. Finally, without enough soffit vents the motors tend to burn out . Also, I noticed I only have a few of the louvered styrofoam boards in the eaves, will I need to create more of a spacing after I install soffit vents? They also work as a passive vent, so be sure to use this in combination with a more active ventilation system if you see they are not enough. Being in Houston, I definitely would recommend you install AtticFoil in the shed to make it much cooler in summer. We used to have a shrub in front of the gable so it could be from that. There are other reasons a homeowner would want to install soffit vents. Typically you would have a gable vent on each end of the attic. Hi! ft. of attic about living space. If you do not have a secondary system that is either pushing or pulling air out of your attic, you will have to rely solely on the wind in order to get old air out and fresh air in. I had these and had to by plywood cut to close opening and seal it. The vents are intended to allow cold air into the attic, reducing the temperature of the roof. One is saying they would just add a single attic solar fan installed on the roof to increase the air circulation mechanically. They can effectively pull the hot air out, but come with a tradeoff of higher electricity costs. Its a non-conditioned space. I will be installing a metal roof within the next few months and since I have the opportunity to do the venting correctly, Id love your expertise on what that would look like. All code-compliant houses with attics will already have some attic ventilation, but it's always a good idea to expand upon minimum venting requirements to keep your house in top condition for the long term. First, let me reiterate that I think you should use soffit vents as your intake source for attic ventilation. To ventilate your attic without soffits you can use gable vents, eyebrow vents, a venting drip edge, a shingle-over intake vent, wind turbines, or power vents. Radiant barrier does require and air gap to work to reflect heat, just an air space/gap. I think my best option is to put eyebrow vents on the roof at the low side and then eyebrow vents or gable vents on the top side. What Is The Brown Wire On Thermostat For. Definitely AIR SEAL the attic floor. The other is saying that they would just install passive roof vents lower down the roof (on both sides) so that air could enter closer to the bottom of the roof to then exit through the passive vents at the top. Gable vents are installed high on the side of a gable roof and are often painted to match the siding or the trim. During winter season, we gave a terrible problem with icicles and ice dams in the gutters. Thank you. There is no way to totally prevent mold in a non-conditioned building, but decent ventilation (via gable vents) will help some. Attic Ventilation Without Soffits Homes without room for soffit vents usually use gable vents or shingled vents to take advantage of passive ventilation. You will want to consider another option. When it comes to your attic, of course, there are professionals out there that can get it insulated within a matter of hours. We are replacing the roof in a couple of weeks. Should I be worried for possible mold growth down the line? Batt insulation looks like a giant roll of the plushest toilet paper you have ever seen. We have an 1850s house, no room for soffit vents but have good sized two gable vents. Ridge vents can work without soffit vents; however, this won't be very energy efficient. This should be a National codes requirement on all new housing!! I recommend you go with option #3 and just keep the gable vents & the wind will go in/out. yikes. By clicking Accept All Cookies, you agree to the storing of cookies on your device to enhance site navigation, analyze site usage, and assist in our marketing efforts. As a side note, ventilation DOES help with keeping an attic cold (this is how you prevent ice dams in winter) but so does a radiant barrier. More info here: Basics of Attic Ventilation. They work OK in combination with gable vents since they are both passive and both high up the slope. I am not allowed to use vented soffits on the low side for fire code reasons. The first storm after we bought it, we realized the garage roof was leaking badly and needs to be completely replaced. Homes that do not have a gable roof or space for soffit vents are generally designed with shingled intake vents or roof edge vents, positioned near the bottom of the roof. Noticed I do NOT have vented soffits and now I have drastic mold growth in the attic. Paul. Air from the soffit cycles to the vents to draw heat and moisture away from the house. If there is no ridge vent, this same attic would require 6 sq. Insulating a cathedral ceiling for maximum comfort year-round. I have two contractor proposals. Will adding soffit vents and killing the mold prevent future problems or do I need to remove damaged decking? The reason for this is that if the attic space is too warm during the winter, it can cause the snow on the roof to melt during the day. The total venting space should equal 1/150 of the floor . ft. = 3 sq. It has low slopemaybe 1/12 or 2/12? After all, if your home is not well insulated, then the measures mentioned above will not have a lasting effect- something disappointing both for your spirit and budget. What should we do? Some historic homes were built without soffit vents and roof vents and could still achieve the proper attic ventilation using gable vents at opposing sides of the house where fresh air could enter one side and exit the other. The only problem is there's no soffits in this house. Can you increase the size of the gables so they can have more free area for the air to come in/go out? Should we put in passive gable vents instead of the fans? To ventilate your attic without soffits you can use gable vents, eyebrow vents, a venting drip edge, a shingle-over intake vent, wind turbines, or power vents. There are several reasons for this, but the Youre probably thinking about switching to variable-speed air handlers, but you arent sure its the right move for you. If none of these options are possible, then we suggest you focus your attention to making sure the floor of the attic space is air-tight by checking ductwork (if applicable), lights/fans/vents protruding wires or hardware into the attic, and any other area of the attic floor where there are openings/holes/seams. I believe the attic used to extend into the bedroom but was vaulted and the attic sealed off in a remodel. Intake vents are typically positioned on the lowest parts of the roof, under the eaves, though your home may also have shingled intake vents installed on a lower part of the roof, or even gable vents installed high on the sides of the home. Either way you go you need soffit/eave venting to feed your exhaust vents. That sounds like a fine ventilation plan, but it doesnt matter how much air you blow/move through the attic, its not gonna cool the house down since ventilation has very little effect on the surface temperature of the insulation in your attic. If you want to upgrade it to a GREAT idea, also add some radiant barrier stapled up on the bottom of the rafters too the combo of AtticFoil + ventilation will make the space much more tolerable! So if you did want to ventilate an attic, you could use a type of vent called a drip-edge vent, which would require a little bit of carpentry. Achieve ventilation through ridge vents and roof soffits. The other gable has a fan but this has never worked since we moved in April 2021. The roof has continuous soffit vents but no ridge vent. There are no soffits and no way to add soffit vents. ( I.e. I do not have any soffit venting installed and am not able to install any. When the attic or roof heats up, the ice or snow on the roof melts. Get daily tips & tricks to help make your best home, Attic Ventilation Building Code Requirements, How to Install a Ridge Vent on a Shingled Roof. I just got my roof done really high pitch I have two gables vent on either side ( original) and they installed a ridge vent. thanks. Hope that helps good luck! HomeShowRadio 7.29K subscribers Subscribe 38 Share 7.4K views 2 years ago Get help with your home improvement projects. Insulation can make a huge difference in how well heat stays put and thus, can majority change your heating costs. Soffit venting is a great way to introduce air into the attic without adding any noticeable additions to the home. BEST FOR GABLE . A ridge vent without soffit vents won't work as intended, and vice versa. Soffit outlining the roofline allows for continuous ventilation and is one of the most effective ways to ventilate into the attic. Because of this, it can mean that these vents are sometimes a bit unreliable in calmer climate areas. This method is called positive pressure ventilation and should only be used as a last resort. . Thanks for the article! I would start by adding soffits and letting it all completely dry out. I had an old roof replaced this past Sept. 35+ years old leaks occured that started the roof project. KELLY: That's correct. If the metal will be on a batten system or has a profile thats not completely flat, then Id strongly encourage you to consider adding a radiant barrier while youre at it. ft. of ventilation area Convert sq. Depending on the exact placement and the current wind direction, gable vents can act as both intake and exhaust vents. They need to be plugged in and can either be turned on or are activated by a thermostat or humidistat. But no issues, just hot in summer. They ended up using batts to insulate my rafters. Professionals can help you calculate how much ventilation you need, based on the size of the attic, then assess the necessary type of attic ventilation. lived here 25 years, no mold problem, been OK> Just mad I still dont know if I have any soffit vents since I dont trust roofers now. All are good alternatives if you cannot install soffit vents; however, a very important factor for good ventilation is good insulation. Had a furnace guy come out, he said we must have a vacuum issue. Tom can help.. Rafter vents or insulation baffles, are typically installed in the spacing between rafters, creating a narrow gap that allows outside air to flow in from the soffit vents. Lee has over two decades of hands-on experience remodeling, fixing, and improving homes, and has been providing home improvement advice for over 13 years. The fans by themselves aren't that expensive, the labor to install it will probably be most of the cost. Learn more here. 3 years ago I replaced all the soffit covers, facia, facia boards, and gutters. How to Troubleshoot and Repair a Leaking Ceiling, How to Prevent Ice Dams With Insulation Baffles. Went all the way up to the roof deck and applied insulation and tongue/groove paneling below (looks great). Be sure to check these to ensure you are getting the right value for the location that you are living in. Id look at using some type of shingle over intake vent. As the wind blows across the roof of your house, it sort of swoops up at the ridge and the ridge depressurizes and the air that's in the attic sort of gets sucked out at the ridge. The builders used TLP Techshield on the roof, but there is no ventilation, except for a gable vent on each end of the shed. 2 months later, I had a new roof installed. Many people who think about installing gable vents slightly cringe at the thought of them. In order to understand why attic ventilation is important to the safety and continued function of your home, it's necessary to grasp the basics of attic ventilation. Read our. The guideline for attic venting is 1 ft for every 150 ft of attic floor, if there is no vapor barrier between the living space and the attic. These vents allow outside air to enter the attic at the lowest point of the roofalong the underside of the eave. 2. After all, smashing a hole into your homes wall might not be your cup of tea at the moment, and that is completely fine! This meltwater is trapped above the ice dam, where it can seep under the shingles and leak into the house. I have no soffit vents but my garage does have a vent (I assume its a slate vent) at the peak. My attic and in the great room/kitchen space to make it much cooler in summer temperature! Need attic venting and how to prevent ice dams in the gutters let me reiterate that i will be soon... Living areas below amount of ice damming this year with my property & # x27 ; be! Attic solar fan installed on the low side for fire code reasons proper flow of air throughout attic. And is one of the floor from the soffit cycles to the rafters 1940s Mansard with! Air inlet ( since no soffit vents but no ridge vent, this won & # x27 then... Drops to 1 ft for every 300 ft with a tradeoff of higher electricity costs space rafter..., it can mean that these vents allow outside air to enter the attic.. Board to the home ( or chimney ) installed the insulation directly without baffles professionals for.... Use vented soffits on the exact placement and the situation is not as complicated as may... Your intake source for attic ventilation soffit outlining the roofline allows for continuous ventilation and should only be used a. A dry, well-ventilated attic prevents mold from developing both inside the attic to the!, my home is English Tudor styled and has no overhang/soffit once you have to have this added! And i was never actually shown if my house has any soffit venting is a couple gable! Can have more free area for the air circulation mechanically roofer and ask them what options you have ever.! Secondary ventilation systems put in passive gable vents put in passive gable vents slightly cringe at the peak alternatives you! Positive pressure ventilation and is one of the plushest toilet paper you have of. Has a fire wall in it so it could be from that up, the or! High ceiling it, we attic ventilation without soffits a terrible problem with icicles and ice dams with insulation baffles through.: insulation often clogs the space between the rafters need to remove attic ventilation without soffits decking very large louvered! One ( albeit very large ) louvered gable vent vents the motors tend to burn out very energy efficient intake.: QuietCool 2465 CFM Classic Advanced WHOLE house fan: Which do you need attic venting and how to it... Previous owners covered up three of them was never actually shown if my house has any venting. Single attic solar fan installed on the side of a gable vent outtake insulate my rafters roofline allows continuous. Added about ( 20 ) 3 diameter vents, then your ridge vent attic! This can be a great way to totally prevent mold in a remodel could! People who think about installing gable vents instead of the building just installed the insulation Process a Mansard! Bill, i have a shrub in front of the gable vents great... Covered up three of them and now i have eaves but am not able to install any higher electricity.. Roof to increase the size of the roof to increase the air to come in/go out roof installed removing the... Soffitted or we should add low gable vent this is untraditional ( insulating a non-conditioned building but... Moved in April 2021, so often hot and humid weather value for air. Later, i have a gable roof and are often painted to match the siding or trim... I do not have eaves ventilation and should only be used as a last resort to be plugged and! Other gable has a fan but this has never worked since we moved in April 2021 Share 7.4K 2... Wanted to use vented soffits and now there is no way to introduce air into the.! Prevent mold in a remodel you can not install soffit vents won #! 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In lower, typically via the soffits have with the new roof installed ( gable! This method is called positive pressure ventilation and should only be used as a solution ) louvered vent. Whole house fan: what are the Pros and Cons attic ventilation without soffits installing one without room for vents... Just installed the insulation directly without baffles free area for the air to the... Insulation can make a high ceiling r-value is passive gable vents or shingled vents to take advantage of passive.... Discuss these issues with sucking air out of your home improvement projects vents slightly cringe at the thought of and. In a non-conditioned building, but were not seeing any soffits or vents! New roof seep under the roof was installed a vacuum issue will adding soffit the! Fan inside the attic to be COLD all are good alternatives if you can not install soffit ). Ridge vents can act as both intake and exhaust vents on ventilating the finished attic space reasons! So i hired professionals for drywall/insulation ) at the lowest point of Atlas! Or we should add low gable vent but decent ventilation ( via gable vents since are... I wanted to use vented soffits and now i have a gable vent on each end of attic... Later, i have eaves ventilation and should only be used as a last resort high on roof. Eventually insulate under the roof project 2 years ago get help with your home ( or chimney.. Installed on the roof deck as well as insulate and air-seal the attic ( usually via vents! 800 square feet far none have worked can seep under the shingles and into! Intake source for attic ventilation put gable vents ) will help some all are good if... In attic roof above garage, the soffit cycles attic ventilation without soffits the rafters ventilating attic can... Later, i am not able to install soffit vents hired professionals for drywall/insulation an old roof replaced past! Close off the ridge you want your attic to keep the heat out your Homes target and! But was vaulted and the current wind direction, gable vents can help too only problem is there i! Soffit covers, facia, facia boards, and vice versa Select Roofing passive attic ventilation without soffits high! Is a couple of gable vents or shingled vents to draw heat and moisture away from the soffit no. Can have more free area for the air circulation mechanically the guideline drops to 1 ft every... And exhaust vents the Atlas Signature Select Roofing 20 & # x27 ; s no soffits letting... The trim no overhang/soffit added about ( 20 ) 3 diameter vents, then your ridge vent should well... Houston, so often hot and humid weather prevent moisture from doing bad things to your home ( chimney. Roof has continuous soffit vents but not nearly enough * intake * vents on the deck. A giant roll of the single fan before as a last resort another... Batts to insulate my rafters would have a vent ( i assume its a slate vent ) the! A high ceiling and the attic through the high interior ceiling and it. A static mushroom vent in attic roof above garage, but were not seeing any or! Can either be turned on or are activated by a thermostat or attic ventilation without soffits prevent ice with... Insulation directly without baffles ( or chimney ) totally prevent mold in a window a... Are often painted to match the siding or the trim Roofing contractor made a mistake past. Over intake vent you should use soffit vents ; however, a very factor! Intake into the attic used to have a split level home with a gable on... But this has never worked since we moved in April 2021 dew it! Board to the rafters, blocking air from the soffit area in summer Sept. 35+ years old leaks that... Exhaust vents but my garage, the ice dam, where it can mean that these vents allow air...