What is timberline in construction?

In construction, timberline has several meanings depending on context, but generally refers to products and systems related to roofing, framing, and construction software. Most commonly in construction, Timberline refers to GAF Timberline shingles, which are America's best-selling asphalt roofing shingles, including Timberline HDZ, UHDZ, and Timberline NS lines, which are architectural laminated shingles used for residential roofing with LayerLock technology and high wind warranty. Contractors often say timberline roof meaning roof shingled with GAF Timberline shingles. Secondly, timberline in construction refers to Sage Timberline, now Sage 100 Contractor, which is construction accounting, estimating, and project management software formerly known as Timberline Office, used by contractors for job costing, payroll, and accounting. Thirdly, timberline can refer to timber line in framing meaning top of wood framing or tree line in site work. In general construction terminology, timberline can mean line of timber framing, edge of wood structure, or brand name for engineered lumber. In Canada, timberline construction may refer to construction at tree line elevation where building is challenging due to climate. So in construction, timberline most commonly means either GAF Timberline roofing shingles, which are premium architectural shingles, or Sage Timberline construction management software, both widely used in residential and commercial construction industries for roofing and business operations.