Grand Traverse Plastics
Williamsburg, Michigan
Springfield Roofing completed a metal retrofit roof for Grand Traverse Plastics in Williamsburg, Michigan. The project addressed a failing metal roof system in need of a durable, weathertight solution to protect the facility’s manufacturing operations.
Grand Traverse Plastics’ existing metal roof system was showing its age, with failed and cracked roof coatings no longer providing adequate protection. Wall flashings and terminations had also failed, creating additional points of vulnerability across the roof.
To correct these issues, the Springfield team began by removing debris from the roof surface and reattaching any loose metal decking. Custom-fit EPS styrene flute fillers were installed between the ribs of the roof deck, followed by a layer of polyisocyanurate insulation board to improve thermal performance. A 50 mil Duro-Last membrane was then mechanically fastened and hot-air welded over the assembly, secured with black double-coated fasteners built to twice the industry standard and penetrating the deck at least 1” per Duro-Last specifications.
A new 24-gauge, one-piece vinyl-coated edge metal system was installed, with the membrane welded directly to the edge metal to create a single, continuous waterproofing layer from roof edge to roof edge. Custom penetration flashings were fabricated from the same membrane material for a consistent seal throughout, and 50 feet of snow retainers were added to help control snow and ice shed off the roof.
With the existing coatings and flashings failing, a metal retrofit gave Grand Traverse Plastics a way to fully seal and insulate the roof without the cost and disruption of a full structural tear-off. Building the new insulation and membrane assembly directly over the existing metal deck restored the roof’s weathertightness and added a layer of thermal and acoustic performance the original system never had – a practical, long-term fix suited to an active manufacturing facility.
Grand Traverse Plastics now has a fully sealed, insulated roof system built to resist the leaks and flashing failures that plagued the original metal roof. The new edge metal and penetration detailing eliminate the vulnerable seams that caused prior issues, while the added snow retainers help manage snow and ice shed at the roof edge – protecting both the building and anyone working below it.
As a company known for crafting bold, creative beers, ciders, and seltzers, Short’s required a roofing solution that could keep up with the demands of its busy production environment.
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