RoofViews

Your Home

5 Signs of Poor Ventilation in a House

By Annie Crawford

March 21, 2023

Dark mold dots interior attic wood rafters representing the signs of poor ventilation

Do you know the warning signs of poor ventilation in a house and attic? Proper ventilation is important in many ways and one of the first big things to know is that it can prolong the life of your roof system. It can also help lower your attic temperature and thereby reduce HVAC wear and tear, which may help lower utility bills and the likelihood of costly repairs. And last, but definitely not least, attic ventilation can help reduce the risk of mold, which can protect the health of your family. All-in-all, attic ventilation offers a long-term return on investment as well as potential preventative health benefits.

What Happens to a Home That's Poorly Ventilated?

Poor attic ventilation negatively impacts your home and can ultimately cost you money. But what makes for a good ventilation system? Ideally, a well-balanced roof ventilation system will efficiently draw cool exterior air into the attic through intake vents and push hot interior air out through exhaust vents. This helps maintain your attic's temperature so that it's similar to the ambient outdoor temperature. When an attic doesn't have proper ventilation, or the ventilation system is blocked by paint, debris, or insulation, hot air gets trapped in your attic's highest points.

Trapped hot air leads to trouble all year round, including roof ice dams in winter and overworked HVAC systems in summer. Proper ventilation helps prevent home repairs and protects your roof investment. That's why it's so important to recognize the warning signs.

How Do You Know If You Have Poor Attic Ventilation?

1. Excessive Heat in the Attic

A hot attic may feel cozy, but it's one of the warning signs of poor ventilation in a house. Perhaps counterintuitively, your ideal winter attic temperature is similar to ambient outdoor temperatures. With poor ventilation in house, the hot air concentrated at your attic's highest points stays trapped. This, in turn, can lead to uneven roof temperatures (ice dams), an overtaxed HVAC (higher energy bills), and other costly headaches.

An indoor digital wall thermometer is a good way to help determine if your attic temperatures are too high.

2. Visible Moisture on Plywood

Wet wood in your attic is not a good sign. When warm, moist air from your home is trapped against your attic ceiling, condensation can occur. Any sign of visible moisture on plywood is a red flag.

Look for beaded water, condensation on hard surfaces, water stains, rusted nails, or rust stains around nail heads. It's important to address visible moisture quickly because trapped, warm, and wet air is a breeding ground for mold and mildew.

3. Mold or Mildew

If left untreated, mold and mildew can negatively impact you and your family's respiratory health, and deteriorate plywood, drywall, and other building materials.

Discolored patches, including white, orange, pink, green-black, gray, or black colors, can be indicators of mold. An active leak or damp area is a possible indicator that mold or mildew is also present. A musty or unpleasant damp smell is another sign. If you're concerned about mold or mildew in your attic, contact a professional.

4. Cracked or Curling Shingles

Poor ventilation can damage shingles by causing extreme roof temperatures, water damage to roof decking, and more. That's why it's important to be alert to the state of your roof's exterior. A regular roof inspection (performed safely from the ground with binoculars) can help you keep tabs on the situation. Warning signs of shingle damage caused by poor ventilation can include blistering on the shingles, granule loss, and curled, cracked, or brittle shingles. If you notice these warning signs, contact a certified roofing contractor.

5. Ice Dams

Icicles around your roof's perimeter may look magical, but don't be deceived. They can be a sign of ice dams caused by poor attic ventilation.

The excess warm air that results from poor ventilation gets trapped within the steeper parts of your roof. This can then melt the snow on the roof exterior above it. The melted snow then drips down and refreezes on lower, cooler areas. This freeze-thaw cycle can create built-up ice dams around the base of your roof that just get larger over time.

When ice dams are not removed, the built-up ice and water can infiltrate your roofing system, leading to shingle damage, roof leaks, and even structural home damage.

What Are the Health Problems Caused by Poor Ventilation?

As mentioned, property damage isn't the only negative consequence of improper attic ventilation. Changes in your family's health can also, unfortunately, be a warning sign. In fact, mold in the home can cause "sore throats, stuffy noses, coughing or wheezing, burning eyes, or skin rash," according to the Centers for Disease Control and Prevention. Asthma and allergies can be triggered by mold and immunocompromised folks are at a higher risk for lung infection.

The right attic ventilation can hopefully save you money on home repairs and medical care, while helping maintain the health of your family and home. Ready to get started on your attic ventilation project today? Contact roofing professional certified by GAF* in your area.



*Contractors enrolled in GAF certification programs are not employees or agents of GAF, and GAF does not control or otherwise supervise these independent businesses. Contractors may receive benefits, such as loyalty rewards points and discounts on marketing tools from GAF for participating in the program and offering GAF enhanced warranties, which require the use of a minimum amount of GAF products.

About the Author

Annie Crawford is a freelance writer in Oakland, CA, covering travel, style, and home improvement. Find more of her work at annielcrawford.com.

Related Articles

A house with a damaged roof.
Your Home

Hurricane Roofing: How to Prepare Your Roof for Hurricanes

While you can't control the weather, you can minimize its impact on your home. If you live in a hurricane-prone area, you can take steps before and after a storm to protect your property from damage. For instance, choosing quality hurricane roofing materials and completing proper roof maintenance can help reduce roof damage.Here's everything you need to know to prepare your roof for hurricane season.Types of Hurricane Roofing MaterialsThe Saffir-Simpson Hurricane Wind Scale classifies hurricane categories based on their highest approximate wind speeds:Category 1: 74 to 95 mph windsCategory 2: 96 to 110 mph windsCategory 3: 111 to 129 mph windsCategory 4: 130 to 156 mph windsCategory 5: 157 mph or higher windsWith this in mind, specific roofing materials are designed to resist high winds and protect against damage from debris.Impact-Resistant ShinglesImpact-resistant shingles meet the UL 2218 impact test standards, defending your roof—and home—against the natural elements. They can cost more than typical asphalt shingles but can be worth the expense if you live in a hurricane-prone region.Metal RoofingMetal roofing can resist heavy impacts and withstand high winds, making it one of the best roofing systems for hurricanes. Some metal roofs can withstand wind speeds up to 150 mph, covering you even during Category 4 hurricanes.Synthetic RoofingSynthetic roofing materials resist wind, water, and fire damage, making them beneficial during hurricanes. Since they use man-made materials, they don't rely on a natural build. Instead, they're built with damage-resistant features in mind while mimicking the appearance of natural materials. These composite roofing shingles are typically made from recycled plastic, asphalt, and other products.GAF Hurricane Roofing SolutionsYour choice of roofing materials can limit roof damage. Some products are manufactured specially to withstand the harshest weather conditions and keep everyone in your home safe. Here are a few GAF products developed with harsh weather in mind.GAF Timberline® AS II ShinglesTimberline® AS II Shingles are created with proprietary SBS-modified asphalt that's flexible to bolster impact resistance. Impact resistant shingles can be stronger than other non-impact resistant asphalt shingles, and since they pass the UL 2218 impact-resistance test, you could potentially qualify for insurance discounts. Timberline® AS II shingles come with a 25-year StainGuard Plus™ Algae Protection Limited Warranty that protects against algae discoloration. Plus, when installed with four qualifying GAF accessories, they're eligible for the WindProven™ Limited Wind Warranty, which provides infinite wind speed protection.GAF Grand Sequoia® AS ShinglesGrand Sequoia® AS Shingles also pass the UL 2218 Class 4 test, as they're built with the same SBS-modified asphalt formula. The DuraGrip™ Adhesive seals shingles tightly to prevent wind blow-off, and the shingles are warrantied against winds up to 130 mph, covering Category 4 hurricane winds.GAF TimberSteelTM Premium Metal Roofing SystemThe GAF TimberSteel™ Premium Metal Roofing System gives your home the hurricane-resistant capabilities of metal roofing at an affordable price. The system can help keep your home safe against high winds and rain through its multiple layers of protection. It's designed to provide a beautiful look with GALVALUME® steel that features top and bottom interlocking to keep everything tight and leakproof.Hurricane-Resistant Roof DesignsMore goes into building a hurricane-resistant roof than just the material. The roof shape and slope can provide additional resistance.Hip roofs can best resist hurricane weather. Although they're typically costlier to build than gable roofs, a hip roof's four slopes provide better wind uplift resistance than a gable roof's two slopes. As the wind flows around the roof causing pressure differences, the additional slopes are better equipped to handle the wind flow.A 30-degree roof slope also provides the best protection against high winds, preventing wind from easily lifting the roof.Installation Quality Plays an Important RoleRoofing contractors must follow proper techniques when preparing or installing a roof for hurricane season. This often means using nails instead of staples to install shingles since nails better attach the shingle to the roof and create fewer holes for water to get in. Likewise, properly installed flashing—without gaps in the intersection—helps keep heavy rainfall from entering the home.Additionally, a contractor can install hurricane clips to ready a roof for harsh weather. These steel plates secure and connect roof trusses to the home's wall structure, keeping the roof attached during high winds. In states like Florida, new homes are required to have hurricane clips installed.Preparing Your Roof for Hurricane SeasonThe Atlantic hurricane season starts June 1 and lasts until November 30, reaching its peak in September.Months before hurricane season approaches, schedule a professional roof inspection from a trusted contractor to ensure your roof is up-to-date and isn't damaged. This gives you sufficient time to complete any maintenance and repairs before the season arrives, as contractors might be busy once it starts.Reinforce Weakened AreasA weak spot in your roofing system can lead to further damage and compromise the rest of the roof's integrity. Even a small opening in a shingle can cause serious water damage during a rainstorm. Your roofing contractor can fix or replace loose or torn shingles, repair broken flashing or fascia, clean debris from your roof, and clear out your gutters.Mitigate Potential Tree DamageSharp winds and storms can sometimes cause tree branches to break and fall on top of the roof, damaging shingles or other materials. So, trim nearby trees as part of your roof maintenance. Also, remove fallen leaves before and after storms. Leaves can clog gutters, preventing water from flowing off the roof during heavy rain.Schedule Post-Storm InspectionsRoofing maintenance after a storm is just as important as before a storm. If a hurricane damages your roof, find a company that handles storm damage roof repair. While you can try assessing any roof damage from the ground, a roofing contractor can accurately identify the damage extent and fix it. They can also help you with any insurance claims if your policy covers you for these circumstances.Protecting Your Roof from Hurricane DamageYou can take several proactive measures to minimize the impact of harsh weather on your roof. Choosing the right materials—and ensuring they're installed correctly—is paramount. Hire a GAF-certified roofing contractor*and enjoy peace of mind as the next storm approaches.FAQCan a roof be hurricane-proof?Due to the nature of hurricanes, no roof is 100% hurricane-proof. But wind- and moisture-resistant roofs perform the best during hurricanes. This is why it's important to choose quality products that will protect your home in the worst possible weather conditions.What is the best roof for a hurricane?The best roof for a hurricane is made with impact-resistant shingles or metal. These materials can handle impacts from heavy objects that may blow onto your roof during a hurricane. Metal roofing can generally handle higher hurricane winds better than typical singles.What type of roof would most likely be torn off in a hurricane?The worst-performing roofs during hurricanes are ones that have wood shingles or shakes. Wood isn't very moisture-resistant without additional coatings. Wood shingles and shakes are also lightweight, so sharp winds can easily lift them. Furthermore, wood isn't as strong as other materials, so it can become brittle when heavy objects land on it.What is the best roof for high-wind areas?Metal roofing is one of the best roofing systems for high-wind areas, as it's built to withstand wind speeds up to 130 to 150 mph. But the installation quality is just as important as the material—even the most robust materials may not stand well against high winds if they aren't correctly installed. Additionally, When installed with the required combination of GAF Accessories, Timberline® Shingles with LayerLock™ Technology are eligible for an industry first: a wind warranty with no maximum wind speed limitation.To ensure your roof is in good shape to protect your home this hurricane season, reach out to a contractor certified by GAF* in your area to schedule a roof inspection.*Contractors enrolled in GAF certification programs are not employees or agents of GAF, and GAF does not control or otherwise supervise these independent businesses. Contractors may receive benefits, such as loyalty rewards points and discounts on marketing tools from GAF for participating in the program and offering GAF enhanced warranties, which require the use of a minimum amount of GAF products. Your dealings with a Contractor, and any services they provide to you, are subject to the GAF Contractor Terms of Use.

By Authors Mark Soto

June 26, 2024

A house's roof edge trim, or soffits and fascia.
Your Home

Roof Edge Trim (Soffits and Fascia) Rotting? Here's What to Do

Your home's eaves, soffits, and fascia are susceptible to rot. While each of these is slightly different, they all work together to protect your home against the natural elements and boost its curb appeal. However, their purpose can sometimes leave them exposed to too much water, causing them to rot. If you notice your roof edge trim, also known as the soffits and fascia, rotting, you'll want to take quick action to prevent further issues.Eaves, Soffits, and Fascia DifferencesWhile similar, the eaves, soffits, and fascia make up different parts of the roof. Eaves are the parts of the roof that extend beyond the walls of your home siding. They guide rainwater away from your home, protecting the siding and foundation from water damage and providing shade to the sides of the home. Roof eaves also play a big part in your home's aesthetic.The roof edge trim is made up of soffits and fascia. Soffits are boards that sit below the eaves and cover their insides; they connect the roof's exterior with the sides of the house. By covering the inside of the eaves and thus protecting the rafters, they help reduce the risk of water damage and keep pests from nesting there. Vents are typically installed on the soffits to help improve the airflow from the attic and roof.Fascia boards are located at your roof's edge along the eaves, connecting with the soffits underneath them. Similarly to soffits, they protect the roof edges against the elements by acting as a barrier. They also contribute to curb appeal. Gutters are commonly attached to the fascia boards, so this can help you differentiate each part when you're looking at the structure.Why These Roof Materials RotYour roof works by directing rainwater to fall off the eaves and flow through the gutters into downspouts. However, that's not always the case. Sometimes, water makes its way beneath the eaves into your soffits and fascia. This is particularly likely if you have clogged gutters or downspouts.When these features can't do their jobs correctly, excess water soaks the fascia and soffit, causing rot and discoloration. Homes usually have a roof drip edge installed on the eaves and rakes to prevent this from happening. If you already have a drip edge installed and your soffits, eaves, or fascia are still rotting, it might mean your drip edge is damaged and needs to be replaced.What to Do When Your Soffits or Fascia RotAs soon as you notice any rotting on your soffits or fascia, you'll want to replace them immediately. The rot can worsen over time as it encounters more moisture, potentially leading to mold and mildew growth. Untreated rot can also lead to structural damage if the water spreads to the rafters below the eaves. In the worst situations, excessive moisture can even reach the drywall and insulation inside your home.You'll likely need to decide whether to replace the roof trim or the entire roof. Your decision depends on whether the rot has only damaged the roof edge trim or has affected other roofing materials too, such as the shingles.If your roof has already reached its expected lifespan, it may be more cost-efficient to replace everything at one time. This will also allow you to create a cohesive and consistent roof aesthetic.Instead of trying to determine the extent of the damage on your own, leave it up to a professional who knows exactly what to look for. Call a GAF-certified roofing contractor* to inspect your roof. They can assess your roof's condition and determine what needs to be replaced.*Contractors enrolled in GAF certification programs are not employees or agents of GAF, and GAF does not control or otherwise supervise these independent businesses. Contractors may receive benefits, such as loyalty rewards points and discounts on marketing tools from GAF for participating in the program and offering GAF enhanced warranties, which require the use of a minimum amount of GAF products. Your dealings with a Contractor, and any services they provide to you, are subject to the GAF Contractor Terms of Use.

By Authors Mark Soto

June 25, 2024

GAF CARE Video Real Talk
Residential Roofing

10 Ways to Use Video in Your Business Strategy

Using video in your business strategy can be a powerful way to engage and build rapport with your customers. The best part? All you need is your cell phone.GAF Real Talk LIVE host Alan Lopez sat down with GAF video specialist Pablo Nivar to discuss low-stress, low-budget, start-today actions that contractors can use to introduce video content into their business strategy. Here are some of the lessons and easy-to-follow guidance highlighted during the pair's conversation.Why You Need VideoIn today's modern world, engaging customers on multiple levels is key. Video allows you to connect face-to-face in a sense and create engaging content that's not overly promotional, which can encourage users to buy. According to a 2021 study, 80% of consumers consider trust a deciding factor in their buying decisions.Don't Stress—Start SimpleFear about entering the professional video space is the biggest hurdle Nivar says he encounters among contractors as a GAF CARE video specialist. Fortunately, you don't need a big budget or professional equipment to successfully begin your video strategy.At the start, your videos are about building relationships. Use that to your advantage by working with what you have, and focus on engaging topics instead of fancy videography.Think Authentic Videos, Not MarketingHave the instinct to sell, sell, sell? Nivar explains why you should think again and create the kind of social media video content you like. Prioritize genuine content that tells a story and builds connection.If this sounds hard, Nivar and Lopez break down 10 types of videos for you to create. For each video type, Nivar gives examples and wording you can use. You don't have to reinvent the wheel; making videos can be easy and even enjoyable.10 Types of Videos to Create for Your Social Platforms1. Before and After VideosBefore and after videos can be a powerful way to showcase your work and benefit your brand without being overtly "salesy."2. Client TestimonialsClient testimonials can build a foundation of trust for future customers, helping them see the quality work you've completed and how you've collaboarated with past customers.3. Educational ContentYou can offer educational content without giving away your expertise for free. Think about what's relevant to your regional audience and focus on teaching, not selling.4. Your Company StoryCreating a company story video shouldn't be your first action, but it can be an impactful way to imbue humanity into your brand down the line. This presents a great opportunity to share your mission and vision, as well as introduce the people that help run the business.5. FAQAnswering questions you often receive is a great way to directly engage your customer base with content that's relevant to them.6. Time LapseTime-lapse videos can fulfill the need for "how it's done" content and show the value of your work. An entire project can be distilled down to minutes.7. Tips and TricksSharing tips with homeowners builds trust with your audience and gives them something valuable to take away from the video.8. Repair How-TosEmpowering homeowners to do their own minor repairs doesn't put you out of a job. In fact, it can show them you're committed to helping them solve their problems. Keep in mind that you should never inspire customers to climb onto their own roof, and instead encourage them leave that work to professionals.9. Customer AppreciationEveryone likes to feel appreciated. Making videos that show customers you value them for choosing your business—and how it makes a difference—can potentially lead to future work with both existing customers and new clients.10. OffersLeaving sales videos for last on your creation list can actually net you more business. You want to promote your business, of course, but it's best to make authentic connections first.Tips for Great VideosKnowing what to record is one thing, but understanding how to take video to benefit your brand is another. During their conversation, Nivar and Lopez not only cover how to use video in your business strategy but also need-to-know logistics. Important topics of discussion include video length, creating calls to action without being pushy, what not to say so you don't alienate customers and other businesses, and how to engage viewers with dialogue that hooks from the start. Additionally, the pair shares tips around enhancing the customer experience during installation using quick video recordings, which just might help earn extra praise in your video testimonials.Introducing Video to Your Business StrategyIf you've never jumped into the world of video content creation, Nivar and Lopez offer simple solutions that give you the tools to launch immediately. Watch their GAF Real Talk LIVE episode for in-depth information and exact steps you can take to start creating your videos. You can even contact the pros for more guidance. Be sure to also follow GAF on Facebook for more Real Talk LIVE episodes and other quality roofing content.Remember, you don't have to go it alone. You can keep expanding your business power with the free trainings, education, and support available to GAF contractors through the CARE Contractor Training Center.

By Authors Annie Crawford

May 14, 2024

Don't miss another GAF RoofViews post!

Subscribe now