Liam Carter
When it comes to roofing, one of the key questions that arise is whether to remove old felt nails during re-roofing. While some roofing contractors opt to leave the old felt, claiming it provides an extra layer of protection, others argue that removing it is essential for effective inspection and to prevent the new felt from absorbing moisture from the old layer. Ultimately, the decision may depend on the condition of the existing felt and local regulations. In this discussion, we will explore the various perspectives and considerations surrounding this topic.
| Characteristics | Values |
|---|---|
| Necessity of removing old felt | It is recommended to remove all old felt before installing new felt to ensure proper inspection of the integrity of the decking and prevent water damage. However, some contractors may leave the old felt if it is in good condition, as it can provide an extra layer of protection. |
| Tools for removing old felt | Claw hammer, putty knife, craft knife, wallpaper scraper, garden spade |
| Nail removal | All old nails should be removed, and any protruding nails should be hammered down or removed and replaced. |
| Roof inspection | After removing the old felt, inspect the roof timbers for damage or rot and replace any defective boards with new, preservative-coated boards. |
| Surface preparation | Clean the roof surface with a brush to remove dirt and debris. Use coarse sandpaper for tough dirt, and dry the surface before applying a waterproof paint or primer. |
| Adhesive usage | Apply adhesive sparingly, as the bitumen in the shed felt will expand and contract with temperature changes. |
Explore related products
What You'll Learn
Removing old felt from the roof
Removing old felt from a roof is a crucial step in ensuring the effectiveness and longevity of the new felt layer. While some contractors may opt to overlay new felt over the existing one, claiming it provides an extra layer of protection, it is generally recommended to remove the old felt completely. This comprehensive process ensures the identification and rectification of any underlying issues, such as water damage or rotten wood, before installing the new felt.
The first step in removing old felt is to use a tool with a sharp blade, such as a wallpaper scraper or a garden spade, to strip off the top layers of felt. This process may require some force if adhesive was used during the previous installation. It is important to be cautious and maintain balance to avoid any accidents. Once the majority of the felt has been peeled off, a putty knife or craft knife can be used to chisel away at any remaining felt that is stubbornly adhered to the roof.
The next step is to address the nails that were used to secure the old felt. It is crucial to remove all old nails to create a smooth surface for the new felt. A claw hammer is an effective tool for this task, as the sharp end can be used to pull out the nails. Pay close attention to the areas where the old nails were located, as these are susceptible to water damage. If you discover any signs of water damage or rot, replace the affected timbers and apply a coat of wood preservative to ensure the longevity of the roof structure.
After removing the felt and nails, it is essential to clean the roof decking thoroughly. Use a bristle brush to scrub away any dirt, debris, or leftover residue. Be gentle during this process to avoid creating dents or scratches on the roof surface, as they can hinder the adhesion of the new felt. Once the surface is clean, use coarse sandpaper to remove any remaining stubborn dirt or residue. Finally, dry the roof surface with a towel to prepare it for the application of a waterproof paint or primer, which will serve as an adhesive for the new felt layer.
In summary, removing old felt from a roof is a meticulous process that requires time and effort. It is important to strip off all layers of felt, remove nails, inspect and address any underlying issues, and thoroughly clean and prepare the roof surface before installing the new felt. By following these steps, you can ensure a smooth and successful application of the new felt layer, enhancing the protection and longevity of your roof.
Gel Nail Removal: Safe DIY Methods at Home
You may want to see also
Explore related products
Inspecting the timber for damage
Firstly, it is important to thoroughly remove the old felt and nails. This can be done using a claw hammer to extract the nails and a putty knife or craft knife to scrape away the felt. Be sure to also check for any remaining nails or obstructions and remove them to create a smooth surface.
Once the old felt and nails are removed, carefully inspect the timber for any signs of damage or rot. Pay close attention to areas where the old nails were located, as water damage is more likely to have occurred in these areas. If you notice any damaged, rotten, or poor-condition boards, they should be replaced with new ones. Ensure that you coat the new boards with a preservative before fitting them into position.
Even if the timbers appear to be in good condition, it is advisable to apply a fresh coat of wood preservative. This extra layer of protection will help maintain the integrity of the timber. Allow the preservative to dry completely before proceeding with the next steps of the project.
In some cases, you may need to remove the roof decking to get a thorough inspection of the underlying structure. This is especially important if you notice any signs of water damage or if the decking was not properly nailed with ring shank nails. If you decide to remove the decking, be prepared to install a secondary barrier before proceeding with the new felt application.
It is worth noting that some roofing professionals can identify rotten spots or issues with the sheathing without removing the shingles or felt. However, if you have any doubts or concerns, it is generally recommended to remove the old felt completely to ensure a proper inspection and effective repair work.
By following these steps and carefully inspecting the timber for damage, you can ensure that your new felt roof has a solid and well-prepared foundation. This will help prevent future issues and ensure the longevity of your roof.
Gel Press-On Nails: A Good Option for Wide Nails?
You may want to see also
Explore related products
Measuring and cutting the new felt
Firstly, it is important to calculate the area of your roof by measuring the length and width of each side of the roof. Multiply the length and width of each side to get the area of that particular side. Then, add the areas of all the sides to get the total area of the roof. This will help you determine the amount of felt needed to cover the entire roof.
Next, roll out the felt on a flat surface, such as the ground or a large table. Using a tape measure, measure the length and width of the felt, adding an extra 5 cm on each edge for overlap, and an extra 7.5 cm for the gable ends. Mark the measurements on the felt with a pencil or marker.
When measuring the felt, consider the size of your shed. If you have a standard-size shed, you will typically need to cut three pieces of felt – two for either side of the roof and one to overlap the panels on the sides. For larger sheds, you may need to cut additional strips of felt for each side of the roof.
Now it's time to cut the felt. Using a hooked blade knife or a straight blade knife, carefully cut the felt along the marked lines. If you're using a straight blade, you may find it more challenging to cut the felt, so work slowly and cautiously.
Once you've cut the pieces of felt to size, it's a good idea to lay them out on the roof to ensure they fit properly. Make sure the felt pieces overlap at the edges to prevent leaks. If any adjustments are needed, use the knife to trim the felt as necessary.
By following these steps, you will be able to accurately measure and cut the new felt for your roofing project, ensuring a precise fit and effective protection for your shed.
Cruelty-Free Gel Nail Polish: Brands You Can Trust
You may want to see also
Explore related products
Applying the new felt
Before applying the new felt, it is important to prepare the roof surface. This includes removing any old felt and nails, inspecting and treating the timber, and measuring the roof to determine the required amount of felt. Once the surface is prepared, you can follow these steps to apply the new felt:
Step 1: Measure and Cut the Felt
Measure the roof to determine the required size and amount of felt. For a standard-size shed, you will typically need three pieces of felt: two for either side of the roof and one for the ridge. Cut the felt accordingly, allowing for overlaps at the edges and gable ends.
Step 2: Apply the Felt
Start by rolling the first layer of felt from the bottom-right or bottom-left corner of the roof, ensuring it remains flat as you work your way up. Use a paint roller to apply a waterproof paint or primer to the surface, which will act as an adhesive for the felt.
Step 3: Secure with Nails
Secure the felt using galvanized clout nails. Start at the centre of the felt and hammer nails through the top edge at 10cm intervals. As you approach the bottom edge, increase the interval to 30cm. For the side panels and the top section on the ridge, use adhesive and hammer nails at closer intervals of 5cm.
Step 4: Work on Overlaps and Corners
Continue rolling new felt rows until you are close to the roof's peak. Add an additional layer of felt, overlapping the ridge by about one foot (30cm). Then, apply the felt in the same manner on the opposite side.
Nailing down the overlaps and corners can be tricky, so it is helpful to have an assistant at this stage. Ensure that the nails are driven flush, as circular nail heads can cause leakage. Each nail should be long enough to pierce two layers of felt in across regions.
Step 5: Finish with Fascia Boards
Finally, reattach any timber fascia boards that were removed at the beginning of the project. Ensure they are securely fastened and out of harm's way.
By following these steps and allowing adequate drying time, you can successfully apply new felt to your roof, ensuring it is properly secured and waterproofed.
Gel Nails: Cleaning and Care Tips
You may want to see also
Explore related products
Securing the new felt with nails
While some roofers may choose to overlay new felt over old felt, it is generally recommended to remove the old felt and nails completely before installing the new felt. This is because the old felt can act like a dry sponge, removing the good properties from the new application. Additionally, it allows for a proper inspection of the integrity of the decking and ensures that any water damage caused by the old nails is addressed.
Once the surface has been prepared and any necessary repairs have been made, you can begin securing the new felt. Start by measuring the area of your roof and buying enough felt to cover it. Unroll the felt on a flat surface and use a hooked blade knife to cut it to size. It is important to ensure that the felt is cut to the correct size, with additional length for overlaps.
When you are ready to attach the new felt, use a paint roller to apply a layer of waterproof paint or primer to the surface. This will serve as an adhesive for the felt. Begin in a bottom corner of the roof and roll the first layer of felt, making sure to keep it flat as you work your way up. Use galvanized clout nails to secure the felt in place, starting at the centre and working outward. Space each nail about 30-36 inches (76-91 cm) apart along the side closest to the roof's peak and 12 inches (30 cm) apart along the side closest to the ground. Be careful to drive the nails flush without penetrating the felt to avoid causing leaks.
For the roof corners, you may need an extra pair of hands as this can be a tricky part of the job. Use a paintbrush to apply adhesive to the ridge before applying the felt. Hammer nails into the lower edge of the top section at 5-inch (10 cm) intervals. Continue this process, overlapping each row of felt by about 30 cm until you reach the roof's peak. Then, apply the felt in the same manner on the opposite side.
The Safe Way to Remove False Nails at Home
You may want to see also
Frequently asked questions
Yes, it is important to remove the old nails that are sticking up. You can use a claw hammer to remove them.
You can use a combination of tools such as a putty knife, a scraper, a wire brush, and a claw hammer to remove old felt and nails.
Yes, it is recommended to remove all the old felt before installing new felt to ensure a proper installation and to avoid water damage.
First, remove any obstructions and use a claw hammer to take out the nails holding the old felt. Then, use a putty knife or a scraper to lift and remove the felt. Finally, sweep or scrub the roof to clean any remaining dirt or debris.
After removing the old felt and nails, inspect the roof timbers for any damage or rot. If necessary, replace any damaged sections with new boards coated with a preservative. Allow the preservative to dry before continuing with the project.
