This spell is an incredibly effective way to protect your home, you’ll be using iron nails to effectively “nail down” your property energetically. For this you’ll need 4 large iron nails, they MUST be iron and they should be at least 5 inches long. Old railroad ties work even better if you can find them.
Begin by holding the nails in your hand and visualize a time you felt unsafe or violated in your home. This can be a real event or an imagined one, the point is that you want to very clearly call to mind the images and feelings that you do NOT want in your house. Think of this as instructions to the spell as to what to keep out.
Take the nails and drive one nail into the ground at each of the 4 corners of your home. As you do this, state the property is YOURS and that no spirit or energy that will harm the inhabitants is allowed to enter. Phrasing your intent this way will allow helpful spirits in and out still, that way any familiars, gods, etc that you work with won’t be locked out.
If you live in an apartment and can’t do this, tape the nails into the outermost corners of your home, close to the floor.
Make sure that if you move you take the nails with you! If you leave them you’ll be tied to the property energetically which can be super draining and have very uncomfortable consequences.