When it comes to roofing solutions, a rubber roof made from EPDM (ethylene propylene diene monomer) has become increasingly popular due to its durability and versatility. A common question is whether a rubber roof can be installed over an existing roof covering. In this post, we’ll explore this option and provide essential considerations for a successful installation.
Understanding Rubber Roofs
Rubber roofs, particularly those made from EPDM, are known for their excellent weather resistance, longevity, and ease of installation. While they are typically used for flat and low-slope roofs, they can also adapt well to various roofing systems.
Can You Install a Rubber Roof Over Existing Roof Coverings?
Yes, a rubber roof can be installed over existing roof coverings, but several key factors need to be considered to ensure a successful and durable outcome.
1. Assess the Condition of the Existing Roof
Before proceeding with the installation of a rubber roof, it’s crucial to evaluate the condition of the current roof:
- Check for ROT: The integrity of your roof is essential. If the existing roof deck or supporting timbers are rotting, they must be removed and replaced. Installing a rubber roof over damaged structures can lead to further complications. OSB3 or exterior-grade plywood is recommended for EPDM installations.
- Evaluate the Waterproof Layer: If the current waterproof layer (such as felt) is in good condition, it can usually remain in place. However, any compromised areas should be repaired before installation.
2. Upgrade Insulation
While renovating your roof, consider enhancing insulation for improved thermal performance. If the existing roof deck is sound, you can:
- Install Warm Deck Insulation: New insulation can be bonded directly over the existing waterproof layer using polyurethane (PU) adhesive or mechanically fixed with screws and washers. This not only improves energy efficiency but also provides a solid base for the rubber roof.
- Bond the Rubber Roof to Insulation: After the insulation is installed, the new rubber roof membrane can be adhered directly to the insulation for optimal performance.
Versatile Rubber Roof Systems
When choosing the right rubber roof system, consider the versatility of different products. Our fleece-backed DuoPly™ and bitumen-backed RESITRIX® systems are particularly adaptable for installations over existing coverings. These options offer enhanced adhesion and compatibility with various surfaces, ensuring a robust roofing solution.
Installation Process
If you decide to install a rubber roof over an existing roof covering, follow these steps for a successful installation:
- Preparation: Clear the roof surface of debris and inspect for any damage that needs addressing. Ensure the area is dry and clean before starting.
- Repair Any Damage: Replace any rotten timber or compromised sections of the existing roof. Ensure the surface is level and stable.
- Install Insulation: If applicable, bond the new insulation over the existing waterproof layer, ensuring a tight fit.
- Apply the Rubber Roof Membrane: Unroll the rubber roof membrane and adhere it to the insulation, ensuring there are no air pockets or gaps.
- Sealing and Finishing: Trim any excess material and seal all seams and edges to create a watertight finish.
Conclusion
In summary, laying a rubber roof made from EPDM over an existing roof covering is a viable option if the current structure is sound and properly prepared. Always assess the condition of your existing roof, consider upgrading insulation for better performance, and choose the right rubber roof system for your needs.
If you’re planning a roofing project and have questions about using a rubber roof, consult with roofing professionals for tailored advice and guidance. Investing in quality materials like EPDM will ensure your roof remains resilient and effective for years to come.
Shop our Rubber Roofing range here, https://www.roofingkitsdirect.co.uk/product-category/rubber-roofing/