If you live in areas where heavy rain is common, roof water diverters are a necessary addition to your roof. With the help of this straightforward yet efficient component, you can prevent damage to your siding, foundation, walkways, and roof.
We’ll get into the details of roof water diverters in this blog post, going over their advantages, setup, and more.
What Is a Roof Water Diverter And Why Is It Important?
A roof rain diverter is a small, yet highly effective device, typically made from metal or plastic, designed to guide rainwater away from vulnerable areas of your roof and into the gutters. Available in various shapes and sizes to fit different roof types, it is crucial to prevent water from pooling in valleys, corners, and high-traffic areas such as over doorways or entryways.
By redirecting rainwater, the diverter helps protect your home from erosion, stains, and leaks, which can occur if water splashes onto walls or doorsteps. This simple addition not only shields your home from potential water damage but also helps maintain the structural integrity of your roof, extending its lifespan and reducing the likelihood of costly repairs.
Importance of a Roof Rain Diverter
1. Prevents Water Damage
A water diverter for a roof redirects water away from vulnerable areas like valleys and walls, preventing leaks and costly damage to the roof and structure.
2. Protects Structural Integrity
By channeling water away, it prevents roof sagging, weakened rafters, and potential structural failure, keeping the building strong and secure.
3. Preserves Landscaping
It protects gardens, soil, and walkways from water runoff, preventing erosion and preserving the beauty of outdoor spaces.
4. Reduces Maintenance Needs
Rain diverters help prevent mold and mildew by stopping water buildup, reducing the need for frequent cleaning and repairs.
5. Cost-Effective Solution
Affordable and easy to install, rain diverters save on long-term repair costs by protecting your property from water damage.
Also Read: 9 Causes of Roof Leaks in Heavy Rain (& How to Fix Them)
What Are The Different Types of Rain Diverters?
1. Roof Valley Rain Diverter
This type is made for roof valleys, where two slopes meet and create a natural water channel. It redirects excess water to gutters or downspouts, preventing overflow, leaks, and structural damage caused by heavy water accumulation in these vulnerable spots.
2. Corner Roof Rain Diverter
Corner diverters are shaped to fit roof corners where water tends to pool. By directing runoff away from these critical junctions, this diverter helps prevent water buildup, which can lead to deterioration and leaks over time.
3. Flat Rain Diverter
Flat rain diverters are metal strips installed under shingles above windows or doors. They create a slight slope that directs water away from these areas, preventing leaks and pooling. Their simple design makes them effective in various roof setups.
4. Roof Rain Diverter Over Doors
Placed above doorways, these diverters keep heavy rainwater from pouring over entrances. This protects people from slipping and shields doors and nearby structures from water damage by guiding runoff away from entry points.
5. Bent Rain Diverter
Bent diverters, placed under the roof’s drip edge, channel water to the sides of the house. This setup keeps water from dripping directly over doors and windows, reducing the risk of leaks and protecting against water damage.
6. Flexible Rain Diverter
Made of plastic, flexible rain diverters can be molded to fit different roof shapes. They create a curved channel that guides water away from problem areas. Flexible and affordable, these diverters are a practical choice for managing rainwater on any roof.
How Do Roof Water Diverters Manage Water Flow?
1. Design and Materials
Water diverters for roofs are made from durable materials like metal or PVC to handle different weather conditions. They have a flat part installed under the shingles and a curved part that stays exposed.
2. Installation Location
The diverter’s flat part is placed under shingles at key spots like roof valleys, corners, or over doorways. This positioning helps manage rainwater effectively.
3. Water Flow Encounter
Rainwater naturally follows the roof’s slope. When it reaches the diverter, it meets the curved surface, which is designed to redirect the water.
4. Barrier Effect
The curved surface of the diverter acts as a barrier, stopping water from flowing directly down the roof and guiding it away from vulnerable areas that might otherwise pool or leak.
5. Redirection of Water
The diverter channels the water away from critical spots and directs it towards the downspouts, which carry the water away from the house.
6. Safe Discharge
Water that reaches the downspouts is safely guided away from the home’s foundation and landscaping, helping to prevent erosion, flooding, and damage.
How To Install A Roof Water Diverter
Tools and Materials Needed
| TOOLS | DESCRIPTION |
| Rain Diverter | Bought or made from metal flashing/plastic sheet. |
| Tin Snips | For cutting the diverter. |
| Pry Bar or Putty Knife | To lift shingles without damage. |
| Roofing Nails | Galvanized or stainless steel. |
| Roofing Sealant or Caulk | For a watertight seal. |
| Hammer | For securing the diverter. |
| Tape Measure | For measuring the area. |
Step 1: Measure and Mark
Start by choosing the spot for your rain diverter, usually centered over a doorway or high-traffic area. Measure the width of this area and add 2-3 feet to the diverter’s length to ensure it extends beyond the sides for effective water diversion. Mark the center point on the roof where the diverter will go, ensuring proper alignment during installation.
Step 2: Loosen the Shingles
Gently use a pry bar or putty knife to lift the second or third row of shingles from the roof edge. Be careful not to damage the shingles to preserve their ability to shed water. Lift just enough to slide the diverter underneath, ensuring it creates a secure seal.
Step 3: Cut the Diverter
Cut the rain diverter to size using tin snips for metal or a utility knife/scissors for plastic. Wear safety gloves to protect your hands from sharp edges while handling the material.
Step 4: Install the Diverter
Place the diverter so it sits flush against the roof or fascia board, centered over your markings. The vertical part of the diverter should sit behind the roof edge, while the bottom horizontal portion extends under the shingles. Angle one side slightly lower than the other to help direct water away from the entryway.
Step 5: Secure the Diverter
Anchor the diverter with roofing nails, placing them near the top to hide them under the shingles. This placement ensures a clean appearance and prevents nails from being exposed to the weather.
Step 6: Apply Sealant
Apply roofing sealant over all nail heads and seams to prevent water from leaking. Seal along the underside of the shingles and press them back into place over the diverter. Allow the sealant to cure as recommended before exposing the area to rain.
When Should You Install a Roof Water Diverter?
1. Frequent Flooding
Install a roof water diverter if heavy rains repeatedly flood entryways or walkways, creating nuisance and safety risks.
2. Erosion Around Foundation
If you see erosion or soil shifting around your foundation, a diverter can redirect water and protect the structure.
3. Water Pooling on the Roof
If water pools in corners or valleys after rain, a diverter can help prevent damage in these areas.
4. Landscaping Damage
To protect your plants and flowerbeds from soil erosion caused by uncontrolled runoff, consider installing a diverter.
5. Ice Dams in Winter
Frequent ice dams may indicate drainage issues. While a diverter mainly addresses water flow, it can help reduce conditions that cause ice buildup.
6. Interior Water Stains or Leaks
Water stains on ceilings or leaks inside the home suggest poor water diversion. A diverter can help fix these problems.
How Much Does A Roof Water Diverter Cost?
Installing a roof rain diverter typically costs between $10 and $200. This depends on the diverter’s size, installation complexity, and if it’s part of a larger roofing project. While the diverter itself can cost only a few dollars, professional installation and additional materials add to the total cost. Prices also vary based on roof steepness and accessibility.
Conclusion
Roof water diverters are an easy and effective way to manage rainwater and protect your home from damage. They help with issues like water pooling near doorways, stains on walls, and roof damage. Installing one is a smart choice for safeguarding your home.
If you’re thinking about installing a roof water diverter or need quality roofing services, OConnor Contracting provides expert help for homeowners in Western New York. We offer everything from roof repairs to full installations, ensuring your home is protected from water damage. Contact us today at (716) 600-7663 for a consultation!
