the covering of existing materials.” This section states, “Level 1 alterations shall comply with the provisions of Chapter 7.” Section 706 Reroofing is similar to Section 1511 of the 2015 IBC. Section 503 provides the scope of Level 1 alterations, which includes “. In Chapter 5, the classification of work is determined. The IEBC Work Area Method is covered in Chapters 5 to 13.
Metal roof systems are typically lightweight, so 5 percent does not allow for a significant increase in gravity loads.
#Standing seam metal roof attachment to insulation code#
Any existing gravity load-carrying structural element whose gravity load-carrying capacity is decreased as part of the alteration shall be shown to have the capacity to resist the applicable design gravity loads required by the International Building Code for new structures. Section 403.3 of the Prescriptive Method addresses existing structural elements carrying gravity load, stating the following:Īny existing gravity load-carrying structural element for which an alteration causes an increase in design gravity load of more than 5 percent shall be strengthened, supplemented, replaced or otherwise altered as needed to carry the increased gravity load required by the International Building Code for new structures. We will look at the Prescriptive and Work Area methods.Īccording to the IEBC, a roof retrofit would be considered an alteration (not a repair or an addition). The IEBC has three compliance methods, Prescriptive, Work Area, and Performance, which have different provisions.
There are more provisions in the 2015 IEBC that apply to reroofing, including the existing structure. Section 1511.3.1 specifically addresses metal roof retrofits: “Complete and separate roofing systems, such as standing-seam metal roof panel systems, that are designed to transmit the roof loads directly to the building’s structural system and that do not rely on existing roofs and roof coverings for support, shall not require the removal of existing roof coverings.” Section 1511.1 states that materials and method of application used for recovering shall comply with the requirements of Chapter 15, which governs the design, materials, construction and quality of roof assemblies. In the 2015 IBC, Section 1511 pertains to reroofing, including roof recovers, but the provisions are limited. In either case, according to Section 105.2 in both the IBC and IEBC, reroofing is not exempt from permit requirements. Check with the local building official to determine which code is applicable. The International Building Code (IBC) and the International Existing Building Code (IEBC) have provisions on reroofing. Many single-ply membrane roofs rely on the existing metal roof to function as a structural deck for support and attachment of the roof system, including board insulation, as well as for support of live, snow, and wind loads, and for providing stability to the roof support members. Single-ply roof systems are also lightweight and utilized for retrofits over existing metal roofs. Good luck and stay safe.Example of a Single-Ply Over Metal Retrofit Assembly Single-Ply over Metal Keeps from having to fight the system due to twists. Oh ya, make sure your system has a good swivel incorporated in the system. Between these, (for steel roofs), as well as the Standing Seam Roof Clamp and a Self-Retracting Lifeline, that's about as safe and sturdy as you can get while having to navigate on steel roofs. They do make an even more stout 2-seam clamp, but I've never used it and not sure of the adjustability, but it seems more adjustments would be required to really dial it in, between having to set it for the profile and width of the seams to clamp on to as well as the distance between the seams.Īnd if you bought a set of Cougar Paws, they actually make a magnetic sole specifically for metal roofs, provided it's actually steel and not aluminum. IMO, regular lifelines are a major security risk to use on metal roofs, since all it takes is one missed-step of either tripping over it or stepping on the lifeline and you're going down, (at least until your system catches you). It can be used in either direction without having to reset, fits hundreds of seam profiles, and works best with retractable lifelines, (although any OSHA approved lifeline & grab could be used). The link is to a YouTube video which shows it in action. Since you're already familiar with lifelines and rope grabs, you might consider getting a Universal Standing Seam Roof Clamp
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