The Vital Importance of Removing the Old Roof and Felt When Re-Roofing

When it comes to re-roofing, many homeowners and contractors are tempted to cut corners and save costs by leaving the old roof and felt intact. However, this practice is not only risky but also undermines the effectiveness of the new roof and its warranty. In this blog post, we will highlight why it is crucial to completely remove the old roof and felt to inspect the decking before installing a new roof. Additionally, we’ll discuss the potential risks associated with leaving the old felt on the roof and the impact it can have on the warranty of the new roof.

  1. Ensuring Structural Integrity

One of the primary reasons for removing the old roof and felt when re-roofing is to inspect the decking for any signs of damage or deterioration. The roof decking, often made of plywood or oriented strand board (OSB), provides the structural support for the roof system. By removing the old roof materials, contractors can evaluate the condition of the decking and identify any issues that could compromise the roof’s stability.

  1. Detecting Hidden Problems

Underneath the old felt, numerous issues may be lurking, such as mold, rot, or infestation. These problems can easily go unnoticed if the old felt and roof are left in place during re-roofing. By removing the old materials, contractors can assess the decking for any signs of water damage, termites, or other structural concerns. Identifying and addressing these issues before installing a new roof will help ensure the longevity and performance of the new system.

  1. Facilitating Proper Installation

Installing a new roof on top of the old felt can lead to significant problems. The old felt may be uneven, torn, or damaged, which can affect the adhesion and integrity of the new roofing materials. Additionally, the added layers of roofing can add unnecessary weight to the structure, potentially causing stress or sagging. By removing the old felt and starting with a clean deck, contractors can ensure a smooth and proper installation, minimizing the risk of future issues.

  1. Warranty Implications

Most roofing manufacturers have specific warranty requirements that need to be met for their coverage to be valid. Leaving the old felt in place during re-roofing can void the warranty of the new roof. Manufacturers typically require a complete tear-off of the existing roof to validate their warranty. By adhering to these requirements, homeowners can have peace of mind knowing that their investment is protected against any defects or failures covered by the warranty.

While it may be tempting to skip the step of removing the old roof and felt during re-roofing, the risks involved far outweigh any potential cost savings. By thoroughly inspecting the decking and addressing any underlying issues, homeowners can ensure the structural integrity of their roof and prevent future problems. Moreover, adhering to manufacturer warranty requirements by completely removing the old roof and felt will provide homeowners with the necessary coverage for any unforeseen issues that may arise. Investing in a proper re-roofing process will not only enhance the longevity of your new roof but also protect your home and its value in the long run.

Published by Mat

Hi I am Mat the general manager of Rock-Crete and a full time firefighter in our great community.

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