How to Felt a Shed Roof

How to Felt a Shed Roof

To felt your shed roof, start by ensuring the roof surface is clean and free from debris.

Next, measure and cut the roofing felt, allowing for an overlap. Begin at the lowest edge of the roof and lay the first strip of felt, securing it with galvanized clout nails.

Overlap subsequent strips to prevent water ingress. Use adhesive under edges and on overlaps for extra security. Don't forget to check and install flashing around any roof protrusions.

Finally, trim any excess felt to maintain a neat finish. Keep exploring and you'll find even more tips on achieving a professional-quality roofing job.

Key Steps To Felting Your Shed Roof

  • Clean and prepare the shed roof by removing debris and ensuring the surface is flat and free of protrusions.
  • Measure the roof and cut the roofing felt with an overlap, using a straight edge for precise cuts.
  • Start at the lowest edge and apply the first strip of felt, ensuring each subsequent strip overlaps to create a watertight barrier.
  • Secure the felt with galvanized clout nails, spacing them evenly and making sure to nail at the overlaps.
  • Trim any excess felt around the edges of the shed roof for a neat finish and to ensure proper sealing.

how to felt a shed roof

Safety Precautions

Before you begin felting your shed roof, make sure to wear protective gear like gloves and safety glasses to prevent injuries. It's important to guard against any potential hazards that come with handling rough materials and using tools up high.

Additionally, confirm your ladder is stable and secure before you climb. A shaky ladder isn't just a minor inconvenience—it's a serious risk. If you're unsure about the ladder's stability, it's better to delay your project than risk a fall.

You should also check the weather forecast before starting; a dry, calm day is ideal for roofing work as it not only ensures better adhesion of the materials but also reduces the risk of slipping or other weather-related accidents.

If the roof area is large, don't hesitate to ask for help. Handling bulky materials alone can be challenging and dangerous. A second pair of hands can make the work safer and more efficient.

This is especially important when you need to maintain balance and focus on precise tasks at height. Remember, safety always comes first, so take the necessary precautions to ensure a successful and injury-free project.

Necessary Materials

Now that you've implemented the necessary safety precautions, gather the materials required to felt your shed roof effectively. Start with roofing felt, the essential component that provides the waterproof layer your shed needs. You'll need enough to cover your entire roof area, plus a bit extra for overlap on each strip.

Next, pick up a pack of galvanized clout nails. They're vital for securing the felt to the roof and preventing it from lifting in windy conditions. Make sure you have plenty, as you'll need to nail every 10 inches along the edges and at overlaps.

Don't forget to grab some roofing adhesive. This will help bond the overlapping sections of felt, enhancing both strength and water resistance. A sturdy hammer, a sharp knife, and a stiff brush are also must-haves. You'll use the hammer for the nails, the knife to cut the felt cleanly, and the brush to clear any debris before laying down each strip.

Lastly, a crow bar might come in handy for removing any old felt or fixtures from the roof surface. With these materials and tools, you'll be set to tackle your roofing project with confidence.

Click here to view our range of flat roofing felts

Roof Surface Preparation

Start by cleaning the roof surface thoroughly to guarantee no debris, dirt, or old roofing material remains. You'll need to make sure the surface is as clean as possible to avoid complications during the felting process. Use a stiff brush or spade to sweep away all loose particles. It's important that nothing interferes with the adhesion of the new felt.

Next, inspect the roof for any signs of damage such as leaks, cracks, or areas with rotting wood. It's important to repair these issues before proceeding. If you ignore them, you're risking further damage that could compromise the integrity of your shed's roof later on. Make sure the roof structure is sound and capable of supporting the weight of the new roofing material.

Also, check for any protruding nails or sharp objects on the roof. These can puncture the new felt, leading to tears or holes that could allow water ingress. Hammer down any raised nails and sand down sharp edges if necessary.

Taking the time to prepare the roof surface properly will help ensure a smooth application process and a durable finish.

Measuring and Cutting Felt

felt roof installation on a shed

To measure and cut the roofing felt accurately, first determine the length and width of your shed roof, adding an extra 50mm on each edge for overlap. This additional space guarantees that you'll have enough material to cover the entire surface, including the necessary overlaps for water resistance.

Once you've got your measurements, lay out the felt on a flat, clean surface. You'll need a straight edge and a sharp utility knife for precise cuts. It's vital to double-check your measurements before making any cuts to avoid any costly mistakes. Remember, accuracy at this stage is critical for a professional finish and effective waterproofing.

Carefully cut the felt according to your measurements. Make sure your cuts are straight and clean. This precision will make the next steps smoother and ensure your felt lines up correctly when you start laying it on the roof.

Don't rush this process; take your time to make sure each piece of felt is cut perfectly. Accurate cutting now prevents headaches later during application, as poorly cut felt can lead to gaps and potential leaks.

Applying Roofing Felt

Begin by positioning the first strip of roofing felt at the lowest edge of the shed roof, making sure it's aligned properly for best water runoff. This alignment is essential as it guides the direction of water flow, preventing any potential leaks or water damage.

Overlapping each strip is your next step. You'll want to overlap them enough to create a solid, water-resistant barrier. Typically, this means overlapping about 10 cm, which guarantees that water can't seep under the layers during heavy rain.

As you lay down each strip, ensure it's smooth and free from wrinkles or bubbles, which can compromise the roof's integrity. It's also wise to choose the right type of felt for your needs. If you're after a more aesthetic finish, consider patterned felt, which can mimic tiles or other designs, enhancing the appearance of your shed significantly.

Keep moving along the roof, unrolling the felt carefully and checking alignment as you go. Remember, precise positioning is key to avoiding future issues. You'll also find that working systematically from one side to the other helps maintain an even coverage across the entire roof surface. This methodical approach ensures a thorough application and sets the stage for a secure and lasting installation.

Securing With Clout Nails

How do you guarantee your felt stays securely attached to the shed roof? Use clout nails spaced about 10cm apart to fasten the material effectively.

Begin by aligning the first strip of felt along the lower edge of the roof. It's important to start at the bottom so each subsequent layer overlaps the one below it, ensuring water runs off without seeping beneath the felt.

As you position the felt, hammer in the clout nails starting from one corner and work your way across. Make sure you're nailing through the overlap where two felt layers meet. This doubles the security against wind uplift.

For corners and any areas where the felt overlaps extensively, don't hesitate to use larger clout nails. These provide extra hold, critical in these vulnerable spots.

Continue laying the felt, securing each new layer with nails along the lap joint and sides. Remember to fold the edges of the felt over before nailing them down to create a cleaner, more water-resistant edge. This step isn't just about aesthetics but also about ensuring the longevity and effectiveness of your roofing material.

Keep the nail spacing consistent and check each line to make sure the felt is taut and smooth as you go.

Using Roofing Adhesive

After securing the felt with clout nails, you'll want to apply roofing adhesive to enhance the bond and guarantee waterproofing at the overlaps. This step is vital to prevent any water from seeping under the felt, which could lead to damage over time.

Here's how to efficiently use roofing adhesive:

  • Make sure that the surfaces are clean: Before applying adhesive, make sure the felt and roof surface are free of debris and dust to achieve the best adhesion.
  • Apply evenly across overlaps: Spread the adhesive evenly along the edges where the felt layers overlap. This prevents any weak spots that could let water through.
  • Use the right amount: Don't skimp on the adhesive, but avoid over-applying it. Too much can cause the felt to bulge, creating pockets where water might collect.
  • Allow for curing: Give the adhesive enough time to set before exposing the roof to any moisture. Check the manufacturer's recommendations for curing times.
  • Check for solid bonding: After the adhesive has cured, check along the overlaps to ensure the felt is securely bonded to the roof.


Installing Flashing

To properly install flashing on your shed roof, first make sure that the area around chimneys, vents, or edges is clean and free from any debris. It's essential for the flashing to adhere correctly and provide a watertight seal.

Next, measure the length needed for each section of the flashing. Cut your metal strips precisely, typically using galvanized steel, aluminum, or copper for best durability and resistance to weather. Start by positioning the flashing at the base of the chimney or vent and gradually work your way down to the edges of the roof.

You'll need to overlap each piece of flashing by at least a couple of inches to make certain no water penetrates the joins. Secure each section with galvanized nails, spaced around 10 inches apart. Be gentle yet firm to avoid bending or damaging the flashing.

Finally, apply a generous amount of roofing adhesive under the edges of the flashing. This secures it further and prevents any water from getting underneath. Make sure all edges are tightly sealed and there are no gaps.

Installing flashing correctly is essential for extending the lifespan of your shed roof by preventing water damage. With careful attention to detail, you'll ensure a robust, watertight roof for years to come.

Checking Drainage

Once you've installed flashing, it's important to verify that your shed roof drains properly to avoid water damage. Confirming good drainage is vital to maintain the integrity of your roof and prevent issues down the line.

Here are a few key steps to guarantee your shed roof has proper drainage:

  • Inspect the Slope: Make sure the slope of the roof is sufficient to encourage water runoff. A flat roof can lead to water pooling which can weaken the structure.
  • Clear Gutters and Downspouts: Check that gutters and downspouts are free from blockages. Leaves, twigs, and debris can obstruct the flow of water, causing it to accumulate on the roof.
  • Check for Pooling Water: After a rainstorm, look for areas where water may be pooling on the roof. This could indicate an issue with the slope or uneven surfaces.
  • Remove Debris: Regularly clear any debris from the roof. Even small amounts can impede water flow and contribute to pooling and damage.
  • Regular Monitoring: Keep an eye on how your roof handles rain. Frequent checks can help catch and address any drainage problems early.


Taking these steps will help ensure your shed roof remains in good condition, protecting your structure from water-related issues.

Trimming Off Excess Felt

Carefully trim any overhanging felt along the edges of your shed roof using a sharp utility knife to guarantee a neat finish. This step is important as it prevents future wind damage and maintains your roof's clean look. Make sure you're wearing gloves to protect your hands and keep your cuts as straight as possible.

You'll want to make sure the felt is flush with the shed's structure. Any protruding edges can lead to improper sealing and potential water ingress, which could compromise the durability of your shed roof. It's all about attention to detail here; a precise trim can greatly enhance the overall appearance of your project.

As you work, check each section of the roof to confirm that no areas have been missed. It's easy to overlook small sections, especially near corners and ridges. A thorough inspection at this stage saves you from possible headaches later.

Finally, once this is done, you can fit fascia boards or flat roof trims.

Rounding Up

Now that you've learnt all about felting your shed roof, you're all set to enjoy a leak-free haven for your tools and treasures. Remember, 'a stitch in time saves nine'—this maintenance isn't just a chore, it's an investment in your shed's future.

Frequently Asked Questions

What Is the Best Way to Felt a Shed Roof?

You're looking for the best method? Start by measuring your shed's roof, then cut and overlap strips of durable roofing felt. Secure with clout nails and seal with adhesive to guarantee longevity and weather resistance.

Do I Need Adhesive to Felt a Shed Roof?

You don't necessarily need adhesive to felt a roof, but it can enhance waterproofing and durability, especially in windy or rainy areas. It's best used on overlaps and edges for extra security.

Can You Felt Over Old Felt on a Shed Roof?

Yes, you can felt over old felt on your shed roof if it's still in good condition and well-attached. Make sure it's clean and free from damage before adding a new layer.

Does Shed Roof Need to Be Dry Before Felting?

Yes, you must ensure that the shed roof is dry before beginning your project. Moisture can compromise the adhesive and affect the felt's effectiveness, potentially leading to leaks and mold growth.


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