Slate Rd. Supply is a surplus and discounted building products supplier for Ephrata, PA, builders and roofers.  With a large inventory includes first-quality surplus items, canceled orders, slightly damaged, and seconds in all sorts of residential and commercial metal roofing and building materials for contractors and DIY homeowners.

Slate Rd. Supply operates in the original location of A. B. Martin Roofing Supply.  When A.B. Martin outgrew the location and moved, Slate Road Supply was started as a child-company of A.B. Martin as an outlet of returned and damaged product.

In September of 2018, Slate Road Supply split off from A.B. Martin and formed as their own company complete with a hardware store, metal roofing roll-former, lumber, and building materials.