Choosing between Removing Old Felt or Installing New Felt Over It: A Comprehensive Guide

When considering a roof renovation, the decision to remove old felt or install new felt over it is crucial. This guide will explore the key factors and considerations that can impact your decision, ensuring you make an informed choice.

Key Factors to Consider

1. Condition of the Old Felt

The condition of the old felt is one of the most critical factors in determining whether to remove it or install new felt over it. Typically, there are two scenarios:

Good Condition

If the old felt is intact without tears or significant wear, it might be possible to install new felt over it. This approach can save you time and labor costs. However, it's essential to ensure that the felt remains in good condition to avoid future issues.

Poor Condition

If the old felt is damaged, it's often best to remove it. Damaged felt can lead to moisture issues, causing mold and rot. Removing the old felt ensures proper adhesion of the new material, preventing future problems and maintaining the structural integrity of your roof.

2. Building Codes and Manufacturer Recommendations

Local building codes and manufacturer recommendations play a significant role in your decision. Some codes may require the removal of old materials to meet safety and performance standards. It's crucial to check with your local authorities and follow the manufacturer's guidelines for the new felt to ensure compliance.

3. Weight Considerations

Addition layers of felt increase the weight on your roof structure. Ensuring your roof can support this additional load is paramount. Overloading your roof can lead to sagging and structural issues over time. Consulting with a roofing professional can help you assess the weight of the new felt and whether your roof can handle it.

4. Moisture and Ventilation

If moisture is trapped between the layers of felt, it can lead to mold, rot, and other structural problems. Removing the old felt allows for better ventilation and moisture control, which are essential for maintaining the longevity of your roof.

5. Cost and Labor

Removing old felt is a more labor-intensive and expensive process, but it can save you from future repair costs. If the old felt is in poor condition, removing it may be more cost-effective in the long run. Consulting with a roofing professional can help you determine the most cost-effective solution for your specific situation.

Conclusion

In general, if the old felt is in good condition and meets code requirements, it may be acceptable to install new felt over it. However, if there are signs of damage or moisture issues, removing the old felt is often the better option. Additionally, it's always a good idea to consult with a roofing professional for a thorough assessment tailored to your specific situation.

Key takeaway: Boone Roofing Solutions will never recommend starting with anything other than a clean deck, as warranty requirements and structural integrity are crucial considerations.