Mortar is a mixture of sand and cement that binds materials, such as bricks, stones, and concrete blocks, together. Think of it as the glue that fills in the gaps between bricks and stones, then seals them in place to prevent damage or deterioration. Mortar also helps spread the load across a wall or structure, keeping cracks and shifting at bay.

Yes, it is usually possible to repair a damaged brick mailbox. A professional brick mason or masonry contractor can perform the repairs. They can assess the damage, provide an estimate, and help you determine if the repair is worthwhile based on the mailbox's value and the extent of the damage. The repair process may involve sourcing replacement bricks and mortar. Damaged bricks can be cut out and replaced, or the mortar joints can be cut out and retucked. It's important to note that the new mortar may differ in color from the original. If the mailbox insert itself is damaged, it can typically be cut out and replaced as well. If your brick mailbox has been completely destroyed, you should check with your local building code enforcement office before rebuilding, as some areas do not allow brick mailboxes due to the potential hazard they pose to drivers.

You can use adhesive strips to hang lights on brick—just make sure you get outdoor mounting tape and not just any old double-sided tape for your project.

A traditional German schmear uses mortar, making it unsuitable for adherence to painted surfaces. Professionals recommend removing any existing paint before applying mortar. However, you can rough up the painted surface and clean it to test if the mortar will stick. Remember that the underlying paint's texture and color may affect the schmear's final appearance—so starting with a bare brick wall will ensure the ideal finish.