When using a torch to thaw frozen pipes, what should you use to isolate the area if near wooden structures?

Using a heat shield to isolate the area when using a torch to thaw frozen pipes near wooden structures is essential for safety. A heat shield is specifically designed to withstand high temperatures and prevents direct heat transfer to nearby combustible materials. By effectively creating a barrier, it minimizes the risk of igniting the wood or any other flammable materials that may be in proximity to the pipe being thawed.

In contrast, while a fire shield also serves to protect against fire hazards, it may not be as effective in blocking heat as a heat shield, which is typically constructed for thermal insulation. A wet rag would not provide sufficient protection against heat and could potentially catch fire itself. A bucket of water, although helpful in controlling small fires, does not provide a physical barrier against heat transfer and may not be practical or effective in preventing combustion of nearby structures during the thawing process.

Therefore, a heat shield is the most suitable choice to ensure safety when using a torch near flammable materials.