As a first-night house in Minecraft, I always make a tree house, but spiders keep messing with me. How can I prevent this?
spiders actually cannot pass through spaces that are 1 square wide. If you create a tree house with an entrance of 1 space squared and you bullet proof the roof by making a design that has only 1 square spaces spiders will not be able to get through either from top nor the bottom.
Here is a video of what i mean:
had hard time finding a video but this one explains it at 1:08
My answer is this, Replace any wood on the top of your house with a non burnable block and put lava down all over the top with glass under it. So mobs don't spawn on the roof, and your house is lit.