Roof Fastening Systems Overview:

The continued use of roofing tiles by designers and architects the world over is a testament to the superiority and practicality of the tile roof. A key element of this success is the unseen component to the tile roofing assembly, the manner of "fixing" or attaching the tiles on the roof. Wire Works, Inc. is a manufacturer of state of the art roofing system hardware since 1985.

Both of the Wire Works Tile and Slate Roof Fastening Systems, the Twisted Wire Works System and the Hook and McLoop Fasteners System, are designed to keep in check the elements of nature affecting a tile roof. They serve to significantly lengthen the life span of the tile underlayment by drastically reducing the number of fastener penetrations through the membrane (underlayment). Normal tile roofs that have been nailed on, have anywhere from 75 to over 300 nail penetrations through the membrane per roofing square (100 square feet).

Consider for a minute the uniform building code standard, Sec. 32.1206 (b)3 concerning the Water Absorption Test for roof tile which state, "Condition of acceptance. No sample shall absorb more than 15 percent water of its dry weight." For one 10 lb. piece of tile (dry weight), that could be an additional 1 1/2 lbs. of water, and keep in mind that a gall of water weighs about 8 lbs. This means that some moisture will inevitably pass through the majority of roof tiles manufactured today.

For this very reason many roof tile manufacturers recommend the use of double roof jacks or double pipe vent flashings to help prevent roof leaks. With the Wires Works Systems, the number of penetrations may be less than 30, depending upon the slope or pitch of the roof. Also these penetrations are sealed shut with plastic roof cement or an equivalent which would be far too labor intensive and costly to do for a "nailed on" application.

Obviously the intention here is to create a condition where the life span of the underlayment is closer to that of the tile. Over the long term these systems save material and labor costs by eliminating the need to physically remove the tile, replace the underlayment and reinstall the tile. Other benefits of the Wire Works Systems are:

  1. Flexibility under adverse weather conditions and building movement,
  2. Ease of tile replacement in the event of cracked or broken tile, and
  3. The capability of installation over wood, steel or concrete roof decks, including those decks utilizing insulation as well.

Both of Wire Works Tile and Slate roof fastening systems are most commonly used with clay roofing tile. Each and every piece of tile is mechanically fastened and therefore they comply with the Uniform Building Code Standards as listed in Chapter 32.