Snellville council hears contractor recommend TPO membrane as cost-saving roof repair for City Hall
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Summary
A contractor presenting core samples told the Snellville council that the City Hall roof has exceeded its life expectancy, recommended installing a TPO membrane over ISO board as a lower-cost approach with a 15–20 year manufacturer warranty (extendable), and said full replacement would be substantially costlier; staff will return with firm numbers and color swatches.
A contractor presenting to the Snellville mayor and council on Aug. 25 said the City Hall roof has passed its expected service life and recommended installing a thermoplastic polyolefin (TPO) membrane over an ISO board rather than a full tear-off and replacement.
The presenter, Parker Young, showed photos and a core sample indicating thin insulation, exposed fiberglass and missing nails that make the roof vulnerable to wind and heavy rain. He said installing a TPO system fastened to the existing metal decking would be lighter, reduce maintenance and provide a 15–20 year manufacturer warranty; the contractor said extended warranties could be purchased to add another 10–20 years on top of that.
“Ultimately, this roof should last 40 to 50 years,” Parker Young said during the presentation. Young also cautioned that coring the roof for future replacement could void existing warranties and that a structural-engineer scope would be sought before work begins.
Council members pressed for cost and timing details. The presenter said an earlier full-removal estimate had been significantly higher and that a revised quote, discussed in the meeting, was substantially lower; staff asked the contractor to return with firm numbers and color swatches for mayoral review. The contractor said lead time for materials would depend on color choices and availability but estimated a one- to one-and-a-half-week mobilization after the purchase order.
The council did not take a formal vote on the roof at the work session. Staff said they would obtain a structural-engineer report and provide updated, firm estimates and material swatches for council consideration at a future meeting.
