Torch down roofing, also known as modified bitumen roofing, is a type of roofing material commonly used in commercial and residential buildings. It consists of multiple layers of asphalt and rubber that are heat-welded together. Torch down roofing is durable and provides excellent waterproofing capabilities, making it a popular choice for flat or low-slope roofs.
One question that often pops up among homeowners and building owners is whether they can apply a sealant on top of torch down roofing. In this article, we will explore this topic in detail and provide you with all the necessary information to make an informed decision.
Understanding Torch Down Roofing
Before discussing whether a sealant can be applied to torch down roofing, let’s understand the nature of this roofing material. Torch down roofing is manufactured in rolls, which are either 36 or 39 inches wide. It is usually installed in two or three layers, with each layer being torched down to the layer beneath it.
The topmost layer of torch down roofing is typically granulated, providing protection against UV radiation and adding aesthetic appeal to the roof. The granules also act as a fire retardant. The middle layer is reinforced with fiberglass or polyester for added strength and stability. The bottom layer, known as the base sheet, is heat-welded to the roof deck, forming a watertight barrier.
The answer to whether you can apply a sealant on torch down roofing is… it depends. Applying a sealant on torch down roofing is not a common practice, and it is generally unnecessary if the roofing system has been installed correctly. Torch down roofing is designed to be a self-sealing system, meaning that the heat-welded seams fuse together to create a tight bond, preventing water penetration.
However, there are some scenarios where applying a sealant might be beneficial. If your torch down roof is showing signs of wear and tear, such as cracks, blisters, or loose granules, sealing these areas can help prolong the life of your roof. It is important to note that applying a sealant should not be considered a permanent solution but rather a temporary fix until you can address the underlying issues.
Types of Sealants for Torch Down Roofing
If you decide to apply a sealant on top of your torch down roofing, it is crucial to choose the right type of sealant. Not all sealants are compatible with torch down roofing materials, so it is important to consult with a roofing professional or manufacturer for guidance.
The most commonly used sealant for torch down roofing is a modified bitumen sealant. This sealant is specifically designed to adhere to the surface of torch down roofing, providing an additional layer of protection against moisture and UV rays. Other options include elastomeric sealants or silicone-based sealants, which can also be effective if they are compatible with the roofing material.
Application Process
Applying a sealant on torch down roofing requires careful preparation and attention to detail. Here are the general steps involved in the application process:
- Clean the roof surface: Ensure that the roof surface is clean and free from debris, dust, and loose granules. Use a broom or pressure washer to clean the area thoroughly and allow it to dry completely before applying the sealant.
- Repair any damage: Before applying the sealant, inspect the roof for any damaged areas, including cracks, blisters, or loose seams. Repair these areas using appropriate repair materials and techniques recommended by the manufacturer.
- Apply the sealant: Follow the manufacturer’s instructions for applying the sealant. This typically involves using a brush or roller to spread the sealant evenly over the damaged areas or the entire roof surface if necessary.
- Allow the sealant to cure: The sealant will need time to cure and form a durable, waterproof barrier. The curing time can vary depending on the type of sealant used, so it is important to follow the manufacturer’s recommendations.
Final Thoughts
While applying a sealant on torch down roofing is not a common practice, it can be done in certain situations. However, it is always recommended to consult with a roofing professional or the manufacturer of your torch down roofing system before attempting to apply a sealant. They can provide you with the best advice and guidance based on your specific circumstances and ensure that the sealant used is compatible with your roofing material. Remember, properly maintaining your torch down roofing through regular inspections and repairs is the key to its longevity and durability.