These products are not as readily available in colors, but can be special ordered in most shades or black/grey — depending on the project's needs; and unlike roll-on systems, these types don't require any additional sublayers underneath it due to their single piece fully adhered design construction. These commercial roofing maintenance
materials come standard as 12 inch tiles measuring anywhere from 3 feet long up to seven feet long (which is an ideal measurement for larger commercial flat roofing projects or large home
projects), but can also be cut down into smaller 2 foot by 2 foot sections if needed. This allows contractors to quickly customize their roof covering material for various areas requiring different measurements without having to cut themselves — which is a time-consuming process with roll-on systems. Despite these differences, many of the other commercial flat roofing products discussed above here are also available in this category; such as cap sheets, perimeter seals and accessories that include both mechanical fasteners for self-adhering purposes along with mechanically attached/stacked sheet membranes (such MBs as GAF's Cool Roof Self Adhesive Underlayment , or Diagonal Screed).