soffit vent strip

- Eric Zingler 12/24/2013. Half of the fabric should hang over the rake side edge of the roof. If not, it sounds as though the entire job needs to be removed. I am a 71 and If on the other hand you plan to insulate the garage and make it a heated space, then it would make good sense to provide a free flowing air path from roof eaves all the way to roof ridge under that roof slope. See ROOF VENTILATION SPECIFICATIONS for more details about correcting under-roof ventilation. Still, opening the soffits for venting can result in a cooler roof surface and longer shingle life, even if there are no moisture problems in the attic. But the case you describe is not a roof-over but a roof-extension - extending an existing roof line out from an existing eave line. Eaves blocked by foam insulation: some older homes were super insulated during the energy crisis in the U.S. in the 1970's by pumping urea formaldehyde foam insulation (UFFI) into building cavities. Watch out:  I'm not clear on how the new roof was attached to the original one. Egg cartons between all rafters. If excess UFFI pumped into building walls has This article series describes inspection methods and clues to detect roof venting deficiencies, insulation defects, and attic condensation problems Use of ridge or off-ridge exhaust vents is required. Watch out:  if the original under-roof venting design did not leave adequate airflow space between the top of the ceiling or under-roof insulation in the original house, or if the ridge vent does not provide adequate outflow opening size along the entire ridge, then this entire question is moot because the original house under-roof ventilation system is not working anyway. Even if continuous soffit venting was installed (seen from outside) it may be blocked in the attic (shown here). Bottomline, it looks like cracking a window can handle the matter until I can afford the latter. Remove any insulation over or near mold contamination, clean the exposed surfaces, fix the moisture source, then you can re-insulate. David, Unless there is another reason to tear open the ceiling - an expensive proposition - I'd treat the roof as a "hot roof" design. It is the ideal versatile filler suitable for a variety of jobs, even large areas. Special binders give guaranteed adhesion and a fill which will not shrink or crack. My comments begin with remarks on the three options you were given, From the photos and your notes I see the following options. I have a concern that the water on the boxes was an indication that the soffit venting was insufficient.The original seemed to be close to the 1/150 rule. Match the SV-3 with Cor-A-Vent’s Sturdi-Strips polyproylene furring to create the Siding Vent System – the first commercial rain screen system on the market**. Compression Joint. In 1993, the Council became part of the School of Architecture, and since then has been known as the School of Architecture-Building Research Council. Provide at least 2" of free air space from the new lower roof eaves all the way to the original roof ridge. If your building has adequate intake venting at the soffits or eaves, and good outlet venting at the ridge, you may still find problems with attic condensation, attic mold, or roof ice dams (in freezing climates) if the attic insulation blocks the venting system. What brought you to our website? They tell you the attic will still have some humidity and you should install (of course for an additional $2200) a dehumidifying system. This company is running a scam in south florida. Mobile it needs continuous ridge venting to act as an outlet. Install ice & water membrane flush with lift edge of SmartVent™ and flush on rake edges. Our patented design has revolutionized the roofing industry with regards to attic ventilation. They told me they were 'changing the environment' of my attic, but reading further online articles says not to close soffits unless you insulate the roof decking and close all spaces. Gable end vents combined with a ridge vent tend to become intake vents feeding air flow currents created by air exiting at the ridge, thus failing to draw air up along the roof underside, failing to cool and dry that area, even if soffit intake venting is present. It provides 18 sq. The 1,100 sq. The ideal choice for intake ventilation when under eave intake is not allowed by county and state regulations or when soffits do not exist. Here are some examples of blocked intake venting in an attic: It's simple. The new ridge vent is providing about the same as the old vent. He has agreed to return next week, as the I had to hire an attic restoration company to remove all the old, used, batting they put in (and the remainder of the 7 yr. old original bown-in they left) and to blow in fiberglass and to remove the cardboard from the soffitt openings. J Track. install ceramic floor tile. But if there is not adequate intake venting of outside air, that same negative pressure tends to draw still more conditioned air (or heated air) out of the building space. Lay the 3’ piece of SmartVent™ even with the drip edge and at the roof rake drip edges. The approximately 1,100 sq. Or see SOFFIT INTAKE VENT BLOCKAGE FAQs - questions & answers posted originally at this article. Be sure there are no air leaks into the roof cavity. Besides, drilling a few holes just won't provide adequate air inflow. in buildings. There's no way to get in the attic to remove them and it was done 15 years ago, would air pressure from outside be able to dislodge them? The more you can keep the air inlet open the better and more-effectively the under-roof ventilation system will work. I can see plenty of light through the gables at the end so it is clear that light is blocked where the soffit vents are supposed to be venting. When removing problem mold from an attic we must also correct the moisture problem by both removing the moisture source and by correcting any attic venting defects. 2.5" Non Perforated Vent Strip. Continue installing SmartVent™ until the last piece. Sorry. openings. If your original roof is not adequately vented you are faced with a decision to convert the building to a "hot roof" design. Want to add extra blown insulation, however before doing so, I have a few questions. Nail the bottom with four nails matching the spacing from the top row of nails along the nail line. SmartVent™ Tapered End-Caps (sold separately) are available for terminating an installation prior to an obstruction such as a wall, chimney, hip, valley or pipe. This will require opening the space between the original roof eave rafter ends and the rafters in the garage roof extension. Next photos show the inside of the garage which shows the rafters meeting the logs on one end, and that 26 feet of soffit is now "in the garage". One person said that 26 feet inside the garage was not enough to make a difference. Additionally, we had added insulation blown in as part of an energy-saving promotion by our city, and I cannot see any light when looking from inside the attic towards the ends of the rafters/sides of the house. About McCoy’s Building Supply. Phone (Required) And some limited amount of water had puddled on some boxes under the ridge. Mod. If you can get into the attic when it's dark (or bring a flashlight but then turn off the attic lights), see if you see light when looking into the eaves - if so there were openings cut. What does remain is the under-roof ventilation question you raised and that it took me some time to understand. The InFlow® Vent is an ideal solution for roofs without soffits or used as a supplemental intake on roofs requiring additional ventilation. In this case the builder and insulator were fortunate because even though roof venting was blocked, there was not an attic moisture problem. blocked attic insulation, it may need to be removed. FasciaVentSmartVentSmartBaffleCedarVentFlo-Free Leaf GuardSmartRidge ISmartRidge IISoffitGuardRevealTape, DCI Products is located at Functional attic venting needs continuous inlet along the eaves or soffits - the article above is about dealing with blocked soffits Blocked or inadequate roof ventilation air intake openings at soffits or eaves: This article explains the effects on buildings caused by locked soffit intake vents and we explain how blocked soffit venting causes or contributes to attic condensation, moisture, and potential mold contamination problems in buildings. Here are some pictures. An inexpensive solution is the addition of styrofoam roof vent baffles which are placed between every rafter pair. U Cap and Base + DRAWINGS PDF. What do we do? The eave application is the first pioneered and most popular application of SmartVent. Hello, The original ridge was continuous aluminum vent and so was the original soffit vents. As air flows readily out of the exit venting high on the roof (ridge vent or gable end vents) it creates a negative pressure with respect to the air pressure in the building occupied space. I estimated the original 1" aluminum at the ridge was providing about 150 sq-in NFA. inches per linear foot (67,720 m 2 /lm) of net free ventilating area and its unique EasyTear™ Sizing feature allows you to hand-tear product in 3" (76 mm) increments — no knives necessary and less waste! (Google, Recommendation, technical assistance, etc) ... install a threshold transition strip. Do I need to add soffit vents if the gap to the attic is blocked with insulation. See our photo (left) of continuous soffit vent strips. But I think the vinyl soffit vents are now only providing 232 sq-in NFA. Inside & Outside Corner. We also provide an ARTICLE INDEX for this topic, or you can try the page top or bottom SEARCH BOX as a quick way to find information you need. The page top photo suggests (by the absence of visible mold) that luckily we may not find a mold problem in every poorly-vented attic or under-roof space. unfortunately believe that work done on my house was incorrect. Soldiers would be coming home after the war and would be needing good low-cost housing. Thanks for the interesting and important analysis. along the edge of the new gutters. Cobra ® Rigid Vent 3™ Exhaust Vent for Roof Ridge allows heat and moisture to escape at the ridge. "The Small Homes Council (our original name) was organized in 1944 during the war at the request of the President of the University of Illinois to consider the role of the university in meeting the demand for housing in the United States. Given property considerations, this was the only way we could add space. Quick Screen Clip. A third said we had to drill holes in the end of the soffit and have some sort of channel down the new garage rafters with holes to outside -- all below the insulation. The contractor assured me it would be enough [ventilation in the attic] but now I've noticed mold in the attic. install a shingle roof. Use the largest baffles that you can find to keep the space open before adding more insulation. SmartVent™ is rated 9NFA. Use SmartVent™ Tapered End Caps when terminating SmartVent™ within the shingled area of the roof. I am replacing soffit on an older home. old soffit with vinyl soffits that had perforations every few feet without InspectAPedia tolerates no conflicts of interest. High nailing: When shingles are fastened above the manufacturer's suggested nailing location. So the fire code issue does not pertain. Gable end vents alone do not uniformly cool and dry the whole roof underside. Each section requires a total of 8 nails (nails should be a minimum of 1 ½”, enough to penetrate through the roof decking). attic Temp reaches 150 degrees, CarlaIllegalmay be strength stretching a point,But in general what does not work well it is to design an attic or under roof space that is following neither hot roof design nor a ventilated attic design but is somewhere in between.Soffit vents alone don't work.Ridge vents alone don't work and increase building heating cost.Soffit vents plus ridge vent do work.In a hot roof design - no roof venting - while some installers may indeed insulate the under roof space between rafters and up against the roof deck,an alternative design puts insulation in the Attic floor.What's important is that you don't have air leaks from below up into the attic space,because in either case you can end up with condensation or moisture problems or mold problems later on.It does seem a bit odd to me that an insulating company would insulate your attic using any system and then tell you that their work is correct but you're going to need to run a dehumidifier in that space. Starter Strip. Hope you can help. Building Research Council, BRC, nee Small Homes Council, SHC, School of Architecture, University of Illinois at Urbana-Champaign, brc.arch.uiuc.edu. It's interesting to see in a post that the soffit vent blocked with mineral wool insulation did not cause mold problems. I don't think that the attic is This past winter, I had a problem with icicles forming The first order of business is to get into the attic and see if he cut any Newer open celled (Icynene®) closed cell foams are in use today. When the contractor originally replaced the soffit vents I expressed concern that just looking at the vinyl soffit vents would provide much less air into the attic. We have no relationship with advertisers, products, or services discussed at this website. Avoid placing insulation between the rafters unless special venting measures are also taken. 2.5" Perforated Vent Strip. Other Roofing Terms. this? Starting 2” from each end of the SmartVent™ piece, nail the SmartVent™ to the roof decking at the top edge with 4 nails spaced evenly. I do not have a ridge vent or gables. and would a attic fan help? I have a Freezing Room Over Garage and am considering blocking the soffit vents with rock wool to reduce the air flow into the rafters and wall cavity behind the insulated knee wall. athttps://inspectapedia.com/ventilation/Hot_Roof_Problem_Solutions.php, When contractor did blow-in for every two baffle's they put in to keep the soffit open, they used cardboard and blocked off 20 so there is no air flow from them. The new soffit vents are vinyl and continuous but are only 3.5 to 4 inches wide. If you are not insulating the garage ceiling then it's not an issue. SmartVent™ can be installed under virtually any shingle course when proper installation techniques are used. Soffit: The exposed area under a roof eave or overhang. I would have built a similar roof overhang (looks like you have 24" or more) at the new garage roof lower end or eaves and vented it. There is no maximum slope installation. I live in NH- Do I need adjustments of both ridge and soffit? Would I be better off calling an insulation company to check out the Flat Cap & Base. The Council's researchers answered many critical questions that would affect the quality of the nation's housing stock. Apologies for the delay. Our house is a brick ranch, 1957, with very little attic space. Ensure the upper underlayments are lapped over the lower underlayments/ice & water membrane at all areas of the roof. Who do we call to troubleshoot and fix? Indeed some contractors are not into reading instructions, building journals etc. Contractors contradict each other and one says do nothing. Reader follow-up: I welcome all opinions and will check [here from time to time to see if anyone else has a different suggestion]. SmartVent™ should align flush with rake fascia on all gable sides & wrapped with enclosed fabric as shown. I'll attempt to send a photo that I took during the winter that Continue reading at SOFFIT INTAKE VENT INSPECTION or select a topic from the closely-related articles below, or see the complete ARTICLE INDEX. Three years ago, I had my 34x24 hip roofed house have its roof and soffit vents replaced. So then I started looking at calculations. We joke that the instructions are just used to kneel upon while doing the actual work. If we make the mistake of providing exit venting from a roof cavity or attic, such as a nice open ridge vent or gable end vents, we also need about twice as much (by square inches) of intake venting at the building eaves. Below is the new roof eaves end seen from the garage interior - showing that any intake ventilation has been blocked at the wall top. As part of a VentSure® Balanced Air Ventilation System of intake and exhaust, the VentSure® InFlow® Vent helps reduce heat and moisture buildup that can lead to ice damming and roof deterioration. Since rock wool allows moisture to pass through, I am wondering if it's ok to use it to block the soffit vents. I now believe that he just covered the The best procedure would be to remove the vinyl panels that your gutter guy installed, cut in a continuous soffit vent strip along the entire soffit - continuous, not intermittent. I am replacing the soffit on an older home. From outside, if the soffit undersides are safely and readily accessible (don't work from a ladder if you're not fit and experienced, don't work alone, don't put a ladder on an icy surface, etc) then often we can push upwards on those vinyl soffit panels. What kinds of construction and production techniques worked well and which did not? soffit? Rule of thumb for venting a standard gable roof, soffit to ridge ratio: Basically we want the soffit intake to be 2x the outlet vent opening. Bottom line: if you see attic moisture or have a really hot attic you probably want to sort out this venting snafu. claims that it was a bad winter. The risk of problem mold bothering building occupants was increased when the attic was in a knee-wall area adjoining a bedroom. 6" V Groove Profile. My question is this : Can holes soffits needed painting (there had never been any vents) and I gave him Are the any rules of thumb that contractors should be using when replacing aluminum vents with vinyl ones? Check the attic side of that ceiling drywall for mold or water stains. Indeed the smaller perforations in some soffit vent coverings can have the effect you describe. Since 1984, Demand Products has continuously expanded from a small, family-owned business to an industry-leading tool & equipment manufacturer and now an essential supplier to the EIFS industry. But the new design does not even meet the 1/300 rule because the ridge is only about 3/4 that needed for a 34x24 attic. Try the search box just below, or if you prefer, post a question or comment in the Comments box below and we will respond promptly. CharlieYou raise a good point: whether or not we have a moisture or mold problem under a roof, in an attic, or in a cathedral ceiling that is not vented or whose venting is blocked depends on a number of site variables such as climate, sun exposure, wind direction, and indoor air leaks and moisture sources that send moisture into the roof cavity.Even if there is not always a mold problem with blocked soffits (and often there IS a mold problem) blocked soffit intake vents, especially if combined with the presence of air movement OUT of the roof space (through leaks or through a ridge vent or gable end vents) is likely to increase the heating and cooling costs for the building by sucking conditioned air out of the structure. A contractor told us because this 26 feet of soffit was now in the garage, we would have trouble. venting at all except for the gable vents. ft. house has 2 gable vents that are each approximately 12x18 inches. This leaves a cold, drafty attic, but it means longer shingle life and no attic condensation problems. The photograph at page top shows an attic whose intake venting is blocked by fiberglass insulation. What roles did community planning, zoning, and interior design play in how neighborhoods worked, "Energy Savers: Whole-House Supply Ventilation Systems [copy on file as /interiors/Energy_Savers_Whole-House_Supply_Vent.pdf ] - ", U.S. Department of Energy energysavers.gov/your_home/insulation_airsealing/index.cfm/mytopic=11880?print, "Energy Savers: Whole-House Exhaust Ventilation Systems [copy on file as /interiors/Energy_Savers_Whole-House_Exhaust.pdf ] - ", U.S. Department of Energy energysavers.gov/your_home/insulation_airsealing/index.cfm/mytopic=11870, "Energy Savers: Ventilation [copy on file as /interiors/Energy_Savers_Ventilation.pdf ] - ", U.S. Department of Energy, "Energy Savers: Natural Ventilation [copy on file as /interiors/Energy_Savers_Natural_Ventilation.pdf ] - ", U.S. Department of Energy, "Energy Savers: Energy Recovery Ventilation Systems [copy on file as /interiors/Energy_Savers_Energy_Recovery_Venting.pdf ] - ", U.S. Department of Energy energysavers.gov/your_home/insulation_airsealing/index.cfm/mytopic=11900, "Energy Savers: Detecting Air Leaks [copy on file as /interiors/Energy_Savers_Detect_Air_Leaks.pdf ] - ", U.S. Department of Energy, "Energy Savers: Air Sealing [copy on file as /interiors/Energy_Savers_Air_Sealing_1.pdf ] - ", U.S. Department of Energy, "Weather-Resistive Barriers [copy on file as /interiors/Weather_Resistant_Barriers_DOE.pdf ] - ", how to select and install housewrap and other types of weather resistive barriers, U.S. DOE, Our recommended books about building & mechanical systems design, inspection, problem diagnosis, and repair, and about indoor environment and IAQ testing, diagnosis, and cleanup are at the. It looks like I have two options:  open window or have the two inch channel from old roof to end of new. Be sure you've also got a working exit vent along the ridge, and check that the vent openings into the attic space are not blocked by insulation. Please re-post the image if you can. [Click to enlarge any image] How did people use different kinds of spaces in their homes? Otherwise here is what happens: Heat and warm air flows into and is lost from the building roof cavity or attic - warm air rising creates upwards convection currents in the building. In sum, I would not do a thing before first investigating the original roof venting design to be sure that there is one, and I might, if the garage is to be un-heated, wait to insulate its roof and wait to see the effectiveness of air intake into the old roof eave soffits entering from the garage space. In general, if a garage addition onto an older home caused a portion of the original roof to become "indoors" by building a new, higher or over-roof over the garage that itself would be vented as well. Mixes to a smooth, creamy consistency. 15 inches of height (see attached pictures - opening to a soffit of about 3 feet of depth). (Fabric sheets included in each box). attic? Is this normal or should I close the opening and add attic baffles in each between the 2x4s. The ideal choice for intake ventilation when under eave intake is not allowed by county and state regulations or when soffits do not exist. We may spot Do you need an attic fan to pull out the hot air? The But if you are you want an air path between every rafter pair and an air intake for each of those bays. Beginning with starter course, shingles must overhang SmartVent™ by at least ½” and no more than 1”. Offering a nationwide 'Cut to Size' service and the widest choice of roofing sheet, rooflights and roofing accessories available in the UK, Ariel Plastics provides specialist roofing and glazing solutions for any application. If not there were either no openings or they are blocked. SOFFIT INTAKE VENT BLOCKED at InspectApedia.com - online encyclopedia of building & environmental inspection, testing, diagnosis, repair, & problem prevention advice. First, let's On your photo above I marked in blue the original roof venting system in theory - we don't know if it is actually working. Or are my hallway mold problems inconsistent with blocked soffits? That slows building heat loss during the heating season. Wrap the end fabric tightly so it covers the outer edge of the SmartVent™ and nail it in place using two nails, one high and one low. Hi! If it was just tacked onto the fascia board of the original eaves I'm not sure this is a structurally adequate connection. remove appliances. I have read that it is illegal to close soffit vents unless you properly seal off the attic. We also explain that attic or roof exit venting without adequate soffit intake venting increases building heating cost. Your Email (required) gutters are leaking in a few places. Our photo of our friend Jess Aronstein's attic (Poughkeepsie NY) shows light at the house eaves - so we expect that there was pretty good intake venting at that location. Full width ice & water membrane (36”) is required to be installed over the SmartVent™ in all environments. On the south side of the townhouse the attic as on opening of approx. install a wall oven. Outside Corner. If the soffit vent panels were installed only after the original solid soffit wood or plywood was removed, the vinyl panels will flex upwards easily for 1/2 inch or even more. be cut from inside the attic and what would be the best way to attempt We like the openings and vents to be just behind the fascia board - it's easier to install (one saw cut instead of two), it lets us leave the rest of the soffit plywood covering in place, and by its location we reduce the chances of wind-wash (movement of loose fill attic insulation away from the wall tops in the attic) and we reduce the chances of wind-blown rain entering the attic space. Conversely, if there are open soffit vents to allow free flow of air into the attic (or cathedral ceiling roof space), the negative pressure or "vacuum" created by the exiting attic air is more easily satisfied by inflowing (cooler, more dry) outdoor air than it is by leaking air from the occupied space. Insulation people? On the first you can see how we extended the roof line. Any advise you could give is greatly appreciated. Finishing Cap & Base. I like to see 2x as much inlet area as outlet area. Your Website IMAGE LOST by older version of Clark Van Oyen’s useful Comments code - now fixed. Inside Corner. If the wood soffit covering was "vented" just by cutting a few intermittent holes before the vinyl was installed, chances are it's going to be inadequate. At above we see the new roof extending off of the edge of the3 original roof eaves, where the perforated white soffit covering remains in place on the original roof overhang. The attic roof vent baffles baffles hold the insulation away from the roof deck to permit air to enter the attic or under-roof space. And we were pleased to note the absence of significant ice dam leak stains on the roof sheathing or rafters. If they are over solid wood they'll feel solid - nothing moves. the job of replacing the soffits. install a vent hood. I called him about the problem, but he The photograph shows building eaves blocked by mineral wool insulation. The best procedure would be to remove the vinyl panels that your gutter guy installed, cut in a continuous soffit vent strip along the entire soffit - continuous, not intermittent. Do not cut slit within 12” of any side or valley/wall intersection, or any other obstruction. The best place for locating or placing attic insulation, from the view of avoiding attic condensation and ice dams, is in the attic floor or up the sides of attic knee walls. The rate of movement or "strength" of the up-flowing warm air current from the building occupied space increases as it enters the attic and finds a ready exit vent at the ridge or gable ends. What a mess is caused!! Fax Again, thanks for your input. Clifton Heights, PA 19018, Copyright 2019 | DCI Products | All Rights Reserved | Web Design By: Del Val SEO, SmartVent Off-Peak / Firewall Application. The house is only 2 years old and main portion is 1100 sq feet without old garage converted. Never install shingles flush with fabric edge on the eaves or rake edge. Some hip roofs add a spot vent on the smaller triangle hip roof ends at the triangular apex near the end of the ridge to add exit opening. BUT if you plan to heat the garage I'd review again the thoughts I outlined above. A history of innovation. We need roughly twice as much air intake at the house eaves as we have air outlet along the ridge. ... install an aluminum soffit. The reason I prefer continuous soffit intake venting is that rafter pairs form a bay that conducts airflow along the roof underside.

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