What can be used to cover patches on a roofing system?

A coat of asphalt emulsion is an effective option for covering patches on a roofing system because it serves multiple purposes. It provides a waterproof seal that can help prevent leaks and further damage to the roof. Asphalt emulsion is also compatible with various roofing materials, allowing it to adhere well and create a seamless bond over the patched area. This not only aids in maintaining the integrity of the roofing system but also ensures durability over time, as it can expand and contract with temperature changes.

In contrast, other materials may not provide the same level of protection or might not bond effectively. For instance, plastic sheeting typically serves as a temporary covering rather than a long-term solution and may not adhere well to surfaces, leading to potential leaks. Metal flashing is generally used to direct water away from joints and edges, and while it can be part of a repair strategy, it does not fulfill the same function as asphalt emulsion for patching. Roofing cement can also be used for patching, but it may not offer the same uniform coverage and sealing capability as asphalt emulsion, especially on large areas that require a thorough waterproofing layer. Therefore, a coat of asphalt emulsion stands out as the most suitable choice for effectively covering patches on a roofing system.