Do you install letterboxes? Abbey October 13, 2017 01:19 Follow No we don't, however we offer easy to follow guides on installing your letterbox on our installation page. We also include installation instructions in each product packaging. Related articles Can I install your fence letterboxes horizontally? Is there a warranty on your products? Do you make custom sized or custom material house signs? I ordered a timber panel letterbox, where are the anchor posts? How do I install my letterbox? Comments 0 comments Article is closed for comments.