Industry News

News Home

Roof Hugger Releases Do's And Don'ts Of Retrofit Roofing

Photos show roofs being retrofitted with Roof Hugger sub-purlins.

Odessa, FL - Roof Hugger LLC, a leading supplier of metal-over-metal retrofit framing products, has released a new series of Do's And Don'ts Of Retrofit Roofing, offering crucial information to ensure the success of metal reroof projects.

According to information from Roof Hugger, "There are a number of ways that existing metal roofs have been and still are being retrofitted. Many of these methods cannot be considered structurally correct systems. They lack the ability to withstand wind uplift or new drift loads for snow and are subject to failure. Our systems have withstood hurricane force wind loads from Katrina, Ike, Michael and others without a single failure.

"Roof Hugger has the most tested retrofit assemblies in the market today, using several different new and existing roof panel combinations for testing. It is this testing that ensures our systems are safe and structurally correct. Competitive systems frequently use calculated values without testing confirmation. Roof Hugger sub-framing systems have been installed on over 100 million square feet of existing metal roofs and continue to be installed on approximately 6 million additional square feet annually. This is the primary reason why Roof Hugger is the most specified metal-over-metal sub-framing systems by building owners, federal and state governments, the military and School Boards."

Below is a brief summary of Do's and Don'ts that are covered in the new document from Roof Hugger:

Number One Don’t: Hat section over existing metal roof high ribs

Number Two Don’t: Wood purlin over existing metal roof ribs

Number Three Don’t: Stand-off clip over existing metal roof purlins

Number Four Don’t: Sprayed-on coatings

Number Five Don’t: TPO over existing metal roofs

Number Five Do: Roof Hugger Sub-Purlin System over existing metal roofs

•Roof Hugger sub-purlins are specifically designed to fit over any existing metal roof system.

•They are much faster, less complex and less expensive than removing and replacing an old metal roof.

•They can be made to a specific height for adding insulation or removing steps in roofs that have created poor weather tight roof connections.

•They can add strength to the existing purlins to overcome the additional weight of the retrofit.

•They can be designed to allow the new roof to comply with today's stricter building code requirements.

•Roof Hugger is the most tested retrofit sub-framing system available. They are made from high strength 16-ga. (0.060 min.), 50 KSI, G-90 Galvanized steel.

•They will allow an existing screw-down metal roof to be upgraded to a standing seam roof without a major engineering analysis and upgrading the existing purlin bracing to make up for the removal of the diaphragm strength provided by the old roof panels.

•Roof Hugger products are made exclusively in the USA.

About Roof Hugger

roof hugger logoRoof Hugger notched sub-purlins enable replacement of new metal roof panels over an old metal roof. They can be used over screw-down or standing seam roof systems and can accommodate new standing seam or screw-down panels. Roof Huggers also maintain integrity of original design loadings; achieve "thermal break" air space between old and new roof sheets; allow for optional insulation; and are laboratory and load tested—with certified load charts. For more information on metal-over-metal retrofit re-roofing, contact Roof Hugger at 800-771-1711 or visit

facebook40   twitter40   linkedin40   youtube40

^ Back To Top