How to Patch Roof Felt

Have you noticed a leak appearing in your roof during heavy rain and need to patch up the felt before winter arrives? Roof felt, also known as roofing felt or tar paper, plays an important role in protecting your home from the elements. Over time, as felt weathers and degrades, small holes and tears can develop leaving vulnerabilities for water to seep through. But with a little bit of felt patching material and some basic roofing skills, you can easily reinstate the waterproof barrier and buy your roof some more time.

How to Patch Roof Felt

In this post on how to patch roof felt, I’ll share a simple step-by-step process for locating the source of any leaks in your feet, making the necessary repairs, and restoring the integrity of your roof’s underlay. By the end, you’ll feel confident tackling small felt patching jobs yourself to extend the life of your roof without breaking the bank on professional repairs. Let’s get started!

Necessary Materials

  • Roofing felt patch material (typically sold in rolls)
  • Utility knife
  • Measuring tape
  • Roofing nails

10 Step-by-step Guidelines on How to Patch Roof Felt

Step 1: Locate the Leak

The first step in how to patch roof felt is to locate the source of any leaks by inspecting your roof for any visible damage or wet spots. You can also use a hose to spray water onto different sections of your roof and carefully observe where water may be seeping through. You’ll want to mark the areas where you find any damage or leaks with tape or chalk.

Step 3: Measure the Area

Using your measuring tape, determine the size of the damaged area and add another 2-3 inches on all sides to ensure complete coverage with the patching material. It’s always better to have more material than not enough. It’s also a good idea to cut the patch material into smaller sections that you can easily handle.

Step 3: Cut the Patch Material

Using your utility knife, cut out a piece of patch material that matches the size of the damaged are you measured in the previous step. It’s important to use a sharp blade to ensure clean and precise cuts. But be careful not to cut the patch material too small as it needs to adequately cover the damaged area. It’s always better to cut a larger piece and trim it down if necessary.

Using Your Utility Knife

Step 4: Remove Old Material

Using your utility knife, carefully remove an old or damaged section of the roofing felt, including any nails that may be holding it in place. Make sure to clean any debris or dirt from the area before proceeding. Otherwise, the patching material may not bond properly. It’s also a good idea to use a broom or brush to sweep away any dust or debris.

Step 5: Apply Roofing Cement

Using a putty knife, apply roofing cement to the area where you removed the old material. This will help create a strong bond between the patching material and the roof underlay. Make sure to spread it evenly and avoid applying too much or too little. But if you do apply too much, simply spread it out with the putty knife.

Step 6: Place the Patch Material

Carefully place the cut patch material onto the cemented area and gently press down to ensure it is secure. You can also use roofing nails around the edges of the patch for added stability. Make sure to leave a small gap between nails to allow for expansion and contraction of the material. But be careful not to nail too close to the edges as it may cause damage or create new leaks.

Step 7: Apply More Cement

Using your putty knife, spread more roofing cement over the patch and any exposed nails. This will help seal any gaps or small holes and prevent water from seeping through. Make sure to cover the entire patch area with a thin layer of cement. It may take a few minutes for the cement to dry and bond with the patch material. But be patient, the end result will be worth it.

Step 8: Secure the Edges

To ensure that your patch is securely in place, use roofing nails around the edges of the patch. This will help prevent any shifting or lifting of the material, especially during strong winds or heavy rain. Make sure to evenly space out the nails and avoid hammering them in too forcefully as it may cause damage. Otherwise, your patch may be compromised. It’s also a good idea to double-check that the patch is flat and smooth.

Use Roofing Nails

Step 9: Inspect Your Work

After applying the patch and securing it with roofing nails, take a step back and inspect your work. Make sure there are no gaps or holes in the patching material and that it is firmly in place. You can also use your hose to spray water onto the patched area and check for any leaks. If you find any, simply repeat the process until the leak is completely sealed.

Step 10: Clean Up

Once you have successfully patched your roof felt, make sure to clean up any tools or materials used. Carefully dispose of any old or damaged material and sweep away any excess debris from the roof. This will not only keep your roof looking neat, but it will also prevent any potential hazards for yourself or others. Always take necessary safety precautions when working on your roof.

Following these simple step-by-step guidelines on how to patch roof felt will help you quickly and effectively repair any leaks in your roof. Remember, regular maintenance and timely repairs can greatly extend the life of your roof and save you from costly repairs or replacements down the road. So don’t wait until it’s too late, keep an eye out for any signs of damage and take action as soon as possible. With a little bit of effort and some basic materials, you can keep your roof in top shape for years to come. Happy patching! 

How Much Could It Cost?

Patching roof felt is a relatively inexpensive and straightforward process, especially if you choose to do it yourself. The cost will depend on the size of your roof and the extent of the damage but typically ranges from $100-$300. This includes the cost of materials such as patching material, roofing nails, and cement.

However, if you prefer to hire a professional, the cost may be higher but will ensure high-quality and long-lasting results. Remember to always do your research and compare prices before making a decision.  Overall, patching roof felt can save you hundreds or even thousands of dollars in the long run by preventing further damage to your roof and home. So don’t hesitate to take care of any necessary repairs as soon as possible.

Preventing Further Damage to Your Roof

Frequently Asked Questions

Q: How Long Will This Patch Last? 

A: The lifespan of a patch will depend on the severity of the damage and the quality of materials used. If the patch is applied correctly, it can last for several years. However, it is always recommended to regularly inspect your roof and make any necessary repairs as soon as possible. 

Q: Can I Patch the Roof Felt in Wet Weather? 

A: It is not recommended to patch the roof felt in rainy or wet conditions. The moisture can prevent the patching material from properly adhering and may compromise its effectiveness. It’s best to wait for a dry day before attempting any repairs.

Q: Do I Need Professional Help to Patch the Roof Felt? 

A: While it is possible to patch roof felt on your own, it may be best to seek professional help if you are not confident in your skills or if the damage is extensive. A roofing contractor will have the necessary tools and expertise to ensure a thorough and long-lasting repair.  However, for smaller patches and minor leaks, following these steps should suffice.  Remember to always prioritize your safety and seek help if needed.

Q: How Can I Prevent Roof Felt Damage? 

A: Regular maintenance and inspections can greatly help prevent roof-felt damage. Keep an eye out for any signs of wear and tear, such as cracks or holes. Trim any overhanging tree branches that may rub against the roof and cause damage. And make sure to keep your gutters clean to prevent water buildup on your roof.  Properly maintaining your roof can help prolong its lifespan and save you from costly repairs in the long run.

Keep Your Gutters Clean

Conclusion

In conclusion on how to patch roof felt, now that you have learned the steps for patching roof felt, you are well on your way to ensuring the durability and longevity of your roof. Remember to always prioritize safety and proper equipment when working on your roof. This might be a simple task, but it requires attention to detail and patience. By following these tips and techniques, you can save yourself from costly repairs in the future and achieve professional results.

So go out there and give your roof the TLC it deserves! And don’t forget to share this knowledge with others who might also benefit from it. Together, we can create roofs that are not just aesthetically pleasing, but also strong and functional for many years to come. Happy patching!

Photo of author

Carmen Fox

Hi, I’m Carmen and I’m the one working behind this site. I grew up on a farm in the Eastern side of San Diego and had an average childhood with my two older brothers. I kept working in different types of skilled trade jobs, from construction work to roofing, electrician to plumber. I’ve also created foundations and fixed ceilings- anything related to construction. After I got married, I kept working in different types of skilled trade jobs, from construction work to roofing, electrician to plumber. I’ve also created foundations and fixed ceilings- anything related to construction. In the years since I started, me and my team have helped thousands of people to build creative, economical, and family-friendly homes at a minimal cost.

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