Haag 4/09 Roof Shingle Thickness Gauge -
The Shingle Gauge is a one of a kind product created through years of research and testing by Haag Engineering. Due to warranty changes this gauge is made for shingles manufactured January 2011 or before.
To test shingles with a "lifetime" limited warranty or from after January 2011, Click here to see the 1/12 Shingle Gauge
This popular tool is a unique invention used by residential roofing inspectors and insurance adjusters to measure the approximate warranty of 3-tab organic, 3-tab fiberglass or laminated asphalt composition shingles.
The device, similar to a metal ruler, measures the thickness of a shingle and correlates that thickness to a warranty level, whether the shingle is wearing appropriately or what a comparable replacement shingle might be can be determined by the measurement and the corresponding scale.
To use, gently lift a shingle tab. Slide the shingle gauge onto the butt of the shingle. Stop at the slightest resistance. The depth of the shingle and the slot of the shingle gauge correspond to the shingles warranty level indicated by the gray bars.
You'll be able to determine the warranty of any 3 tab organic, fiberglass, or laminated composition (also known as architectural or dimensional weight) shingle.
The Haag Shingle Gauge is applicable to 94% of composition shingles sold in the United States in 2009.
Organic laminated shingles are not included on the gauge because only a small percentage are made of this material. Also, composition shingles manufactured with "polymer-modified" asphalt do not conform to the Shingle Gauge. Modified asphalt has plastic or rubber added, and changes the thickness of a shingle. You can identify a shingle with modified asphalt by the rubbery or springy feel.
Debuted in 1993, the shingle gauge or gage is hugely popular and helpful to adjusters and roofers. Updated in 2009 to reflect current warranties in the roofing industry.