by Marcy Marro | June 1, 2022 12:00 am

At first blush, many folks think all WTWs work the same; however, nothing could be further from the truth. Instead, each manufacturer’s WTW varies but typically contains the same five basic components:
Warrantied Systems:
Weathertightness warranties are typically only available for concealed fastener style standing seam panels installed to predetermined minimum roof slopes. Consequently, it’s always best to reach out to specified manufacturers and discuss your project specifics to ensure that a WTW will be available.
Involved Parties:
Joint warranty: As the name implies, joint WTW’s split liability between the panel installer and the panel manufacturer. The contractor is typically responsible for the first two years of leak-free service for Joint warranties. Once two consecutive years of leak-free service have been achieved, the manufacturer is responsible for the remaining warranty term.
Pros:
Cons:
Single-source warranty: Unlike joint warranties, the single-source warranty places full responsibility on the manufacturer for the project’s weathertightness from the beginning.
Pros
Cons:
Warranty Length
Warranty length refers to the duration of the warranty coverage. Most manufacturers offer warranty periods ranging from five to 20 years, directly correlating warranty length and cost. As the warranty length increases, the cost of the warranty also increases.
Warranty Liability Limits
The liability limit of a WTW is the dollar amount of protection provided. Most manufacturers offer various limits ranging from as little as 0.08-square-foot on the low end to what is often referred to as no dollar limit or no repair limit on the high end, with many levels in between. As the coverage provided by the warranty increases, so too does the cost of the warranty.
A word of caution on warranty limits: when specifications call for a “manufacturer’s standard weathertightness warranty,” some manufacturers bid the lowest coverage possible. While this practice can help them win the project, as you can imagine, it often leads to frustration after the fact. Instead of using the term “standard,” the best approach when writing your specification and including a WTW is to specify the desired coverage amount.
Optional Coverages
Another element of manufacturer-supplied WTW’s involves optional coverages. For example, most manufacturers exclude coverage for excessive wind speed and penetrations from their base warranty. And instead, charge additional fees for their inclusion. To avoid unexpected coverage gaps, it’s always best to request a weathertight warranty sample document from any manufacturer included in your specification.
Certified Installers Instead of WTW’s
Properly installed metal roofs don’t leak. Consequently, it may be preferred to save the warranty cost and instead include a manufacturer-certified contractor requirement in the project specifications and gain these benefits:
Are weathertightness warranties worth the additional cost? They can be; however, WTWs require research and due diligence to ensure all parties on the project team understand the coverage that is (and isn’t) provided. Requiring manufacturer-certified installers can be an excellent no-cost alternative.
Kathi Miller is in charge of architectural national accounts at McElroy Metal[1], Bossier City, La. She can be reached at kmiller@mcelroymetal.com[2].
Source URL: https://www.metalarchitecture.com/articles/are-weathertightness-warranties-worth-the-money/
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