At FixTrade.co.uk, we know that a reliable, watertight roof starts with the right products and the right technique. Whether you’re repairing a shed roof, installing new felt on a garage, or sealing overlaps on an outbuilding, understanding how to apply roofing felt adhesive properly will ensure lasting protection against the elements.
Roofing Felt Adhesive - What It Is and Why It Matters
Roofing felt adhesive is a cold-applied bonding compound used to fix layers of roofing felt to timber, concrete, metal, or existing felt surfaces. It provides a waterproof bond that expands and contracts with temperature changes, keeping your roof sealed in all weather.
At FixTrade.co.uk, we stock premium EverBuild Black Jack 904 Bitumen Roof Felt Adhesive, a professional-grade product used by tradespeople across the UK. This oxidised bitumen-based adhesive delivers high bond strength and long-term flexibility - ideal for both new installations and repairs.
Key Features:
- High bond strength for dependable adhesion
- Suitable for sealing felt laps and bonding chippings to the top layer
- Flexible film that adjusts with temperature changes
- Resistant to water, salt, dilute acids, and alkalis
- Compatible with most surfaces, including metal, timber, and concrete
For sealing joints, gutters, or tricky roof details, we also recommend EverBuild Roof & Gutter Sealant, a premium butyl-based adhesive that can even be applied in wet conditions.
Tools and Materials You’ll Need
Before you begin, make sure you have everything ready. Preparation is the key to a neat, efficient application.
You’ll need:
- A stiff brush or roofing felt applicator
- A clean bucket and mixing stick (if required)
- A utility knife or scissors for trimming felt
- Protective gloves and safety glasses
- A dry cloth or rag for wiping spills
- Roofing felt rolls
- Roof & Gutter Sealant for edges and joints (available here)
Step-by-Step: How to Apply Roofing Felt Adhesive
Step 1: Prepare the Surface
Ensure the roof surface is clean, dry, and free from dust, grease, or loose material. If you’re working on an existing roof, remove any damaged felt or debris. On concrete or timber, check for cracks and make repairs before applying adhesive. If the surface has previously been coated, lightly abrade it to create better adhesion.
Step 2: Apply the Base Layer of Felt
Unroll the first strip of roofing felt and cut it to size. Position it carefully, allowing for an overlap of around 75 mm on side joints and 150 mm on end laps. Once in place, roll it back halfway to expose the surface beneath.
Step 3: Brush on the Roofing Felt Adhesive
Using a brush or mop, apply a thin, even coat of EverBuild 904 Felt Adhesive to the exposed section of roof. The adhesive should be spread evenly without pooling - roughly 0.7 L per m² is typical for bonding layers.
Wait a few minutes until the adhesive becomes tacky to the touch. Carefully roll the felt back into position, pressing it firmly down to ensure full contact. Use a roller or broom to smooth out any trapped air bubbles.
Repeat the same process for the remaining section, ensuring all joints are overlapped and sealed.
Step 4: Secure Overlaps and Edges
To seal overlaps, brush a thin layer of adhesive between felt joints, then press firmly together. For additional waterproofing around joints, gutters, and roof edges, use EverBuild Roof & Gutter Sealant.
This butyl-based sealant adheres strongly to bitumen, metal, and wood, and can even be applied in damp or wet conditions - ideal for quick repairs or weather-exposed work.
Step 5: Apply Top Dressing or Chippings (Optional)
For flat roofs, adding solar reflective chippings helps protect the surface from UV damage and heat. To bond chippings, apply a final thin coat of EverBuild 904 Felt Adhesive, scatter the chippings evenly, and allow to dry completely.
Curing and Drying Times
Drying time will depend on temperature, humidity, and application thickness. In warm, dry conditions, EverBuild 904 Felt Adhesive typically cures within 24 hours. Avoid walking on the roof or applying additional layers until the adhesive has fully set.
Always check the weather forecast - applying adhesive in rain or freezing temperatures can compromise the bond.
Troubleshooting Common Issues
1. Bubbling or Blistering
Cause: Trapped moisture or air between layers.
Solution: Cut a small slit in the blister, lift the felt slightly, and re-adhere using a thin layer of 904 Felt Adhesive. Press flat and allow to dry.
2. Adhesion Failure
Cause: Dirty or damp surface, or applying too thickly.
Solution: Clean the area thoroughly, reapply a thin, even coat, and allow proper curing time before re-laying felt.
3. Uneven Finish
Cause: Excess adhesive pooling or improper smoothing.
Solution: Use a roller or brush to distribute adhesive evenly and work methodically across small sections at a time.
4. Cracking Over Time
Cause: Inferior adhesives or excessive temperature variation.
Solution: Always use a quality adhesive like EverBuild 904 Felt Adhesive, designed to soften and harden flexibly with temperature changes.
Roofing Felt Adhesive - Maintenance and Longevity
Regular inspection helps prolong the life of any felt roof. Check for signs of peeling, lifted edges, or pooling water every six months. Promptly reseal any minor issues with Roof & Gutter Sealant to maintain waterproof integrity.
For large-scale repairs or professional finishes, our trade customers can take advantage of our Price Match Promise and Free Next Day Delivery, ensuring you have the materials you need exactly when you need them.
Why Choose FixTrade.co.uk for Roofing Felt Adhesive
- Free Next Day Delivery on qualifying orders
- 30-Day Returns Policy for peace of mind
- 24/7 Support - contact us via email or DM @FixTrade_co_uk
- Price Match Promise - we guarantee not to be beaten on price
As part of our Roofing Accessories and Tools range, we supply trusted brands like EverBuild, giving our customers confidence in every project - whether DIY or professional.
Ready to get started on your roofing project?
Shop the full range of roofing felt adhesives and sealants now at FixTrade.co.uk.