How do I prevent building materials from decaying in rainy biomes?

In Valheim, building materials can decay over time, especially in rainy biomes like the Meadows, Black Forest, and Swamp. Rain causes wooden structures to lose durability, turning them a darker color and reducing their health. However, decay does not destroy structures completely; it only reduces their health to 50%. To prevent decay, you need to understand the game mechanics and take proactive steps to protect your builds.\n\nOne of the most effective ways to prevent decay is by using a roof. Rain only affects exposed wooden structures, so covering your buildings with roofs will shield them from the elements. Ensure that all wooden walls, floors, and supports are fully covered by roof tiles. Use thatch or wooden roof pieces to create a seamless cover. For example, if you''re building a house in the Meadows, make sure the roof extends slightly beyond the walls to prevent rain from reaching the edges.\n\nAnother solution is to use non-wooden materials for exposed parts of your structures. Stone, for instance, is immune to decay and can be used for foundations, walls, and floors. Once you unlock the Stonecutter (crafted with Iron and Wood), you can start building with stone. Combine stone foundations with wooden upper levels to create durable and aesthetically pleasing structures. This is particularly useful in the Swamp biome, where rain is frequent and wooden structures decay quickly.\n\nFor players who prefer wooden builds, applying a coat of tar can help. Tar is obtained from the Plains biome by destroying Tar Pits or crafting it at the Cauldron. Once you have tar, use the Workbench to apply it to wooden structures. Tarred wood has a darker appearance and is resistant to decay, making it ideal for exposed areas like fences, beams, and decorative elements. This method is especially useful for players who want to maintain a wooden aesthetic while protecting their builds.\n\nIf you''re building in a biome with constant rain, such as the Swamp, consider elevating your structures. Use wooden or stone pillars to raise your buildings above the ground. This not only protects the base from decay but also reduces the risk of damage from enemies. For example, a raised platform in the Swamp can serve as a safe haven for crafting and storage, away from the damp ground and hostile creatures.\n\nFinally, regular maintenance is key to preventing decay. Check your structures periodically for exposed wooden parts and repair them using a Hammer and the required materials. This is especially important after storms or raids, which can damage roofs and leave wooden components vulnerable. By staying vigilant, you can ensure your builds remain sturdy and decay-free.\n\nIn summary, preventing building material decay in rainy biomes requires a combination of smart design, material choice, and regular upkeep. Use roofs to shield wooden structures, incorporate stone for durability, apply tar for added protection, and elevate builds in wet biomes. With these strategies, you can create long-lasting structures that withstand the harsh weather of Valheim''s world.