Squaring metal roofs is relatively easy and required for proper installation.
Using a steel roofing square.
Step 1 work out the ratio of the roof.
For example you may find a ratio which says 8 16.
Before you can use the roofing square you need to work out the ratio of the roof pitch.
Proper use of a roofing square features.
In most american states it is standard to express the pitch of the roof as a ratio so you should be able to locate it on blueprints and plans.
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The standard two foot framing square also referred to as a carpenter s square and historically as a steel square is an l shaped tool that is used to mark angles for cuts used in building framing particularly roof rafters stair stringers and many other cuts or angles other than 90.
Generally the roofing square is a flat l shaped steel or aluminium tool that has two components.
When framing a roof whether metal shingled or shaked it must be square.