Metal Roof Fastener Spacing

This article describes the fastener screw or nail schedule for several types of exposed fastener metal roof systems citing manufacturers installation manuals and guidelines.

Metal roof fastener spacing.

How to calculate and place screws. The table below can be used to figure approximate quantities of screws for various purlin spacings and sizes of roofs. Screws are available in quantities of 250. See page 6 for more information on screw spacing and ordering.

Screw line spacing for metal roofing over metal purlins. You must make sure you are placing the screws in the appropriate place for a tight fit so that the panel is able to resist specific loads. A metal roof is a long lasting roof but checking the screws for damages is an important part of metal roof maintenance. Preventing leaks lengthens a roof s life.

Using the right tools is an essential step to prevent maintenance issues and roof failures. Once the purlin spacing is determined then the metal roofing panels are typically attached to every line of purlins. We include a discussion of the requirement for use of a greater number of metal roof fasteners in high wind zones and we give an example schedule of the. 1 inch and 2 inch.

An engineer will use a load chart in order to determine the spacing between metal purlins. Let s take a look at the most common types of metal roofs for houses. An affordable option and easier to lay than shingles tin is the most commonly used type of metal roofing. Allsteel carries screws in 2 different lengths.

Inch screws can be used. There are lap screws metal to wood screws metal to metal screws sealing tape and you need to know the spacing of the screws. Other flashings include transition flashing end wall and. Trim the most common flashing for metal roofing is the ridge cap which is used at the peak of a roof where two opposing roof slopes join.

The 1 inch variety is the best all purpose size. Spacing recommendations for exposed fastener metal roof systems. Many newer metal roofs are built with exposed fasteners which can leak if the metal roof installation guide is not carefully followed. This will depend upon the type of panel that is used and the thickness of the steel.

Why is screw spacing important.