Construction Company Letterhead Template Free Download – Letterhead templates can be difficult to use, but there are a few tips that can make the task more simple. The first step is to look over the various letterhead formats. There are two main types of format for letters, the single-line variant, and the double-line form. Let’s talk about the differences between the two types before moving on to the main concept behind letterhead templates. Your corporate letterhead templates will likely contain your company’s name, your logo, a description of your business and contact details.