Sika Sarnafil Roofing Systems in Kenosha, WI

Thermoplastic Membranes and Related Products

Sika Sarnafil is the roofing and waterproofing line of Sika, a global construction chemicals company; Versico supplies comparable single-ply categories. Its commercial roofing systems are best known as thermoplastic single-ply membranes, with PVC as the central product, supported by liquid-applied waterproofing, coatings and accessories. A commercial roof carrying such a membrane has welded seams that fuse the sheets into one surface.

That construction shapes inspection. The membrane itself is a flexible sheet, and the seams, the flashing welds and the terminations carry the risk. We identify the membrane on each section, note its color and thickness where visible and write it into the roof plan.

Liquid-applied products belong in the file too. A resin flashing at an odd penetration, or a coating on a repaired area, is a different material from the sheet around it. We record each liquid-applied detail with its location, product and date, since it ages on its own schedule and is repaired by its own method.

Weld Probes and Test Cuts

A welded seam can look perfect and still be weak. We probe a sample of seams on each visit with a blunt tool, record any opening and photograph the result. At repairs, we weld a patch with hot air, then check the edge with the probe after it cools.

When the owner wants stronger proof, we cut a test strip from a repair weld and pull it. A sound weld tears the sheet and not the seam. The result goes into the file with a photograph of the cut. That kind of record matters when a warranty review asks whether workmanship held. The PVC roofing method logs how welds age across winters.

Weld quality depends on three variables: temperature, speed and pressure. A welder who moves too fast leaves a weak seam, and one who runs too hot burns the sheet. Because those variables change with weather, we note the temperature and wind on the day of any repair. If a weld fails at the first winter, the weather note helps explain why, and the next attempt starts from the cause.

Flashings, Corners and Penetrations

The details are where a welded roof leaks. Prefabricated corners and boots reduce the number of hand welds, but hand-formed flashings are still common at odd shapes. We check each termination bar, sealant bead and welded edge. We photograph the top of wall flashings, where the membrane meets a parapet or curb.

Rooftop equipment adds penetrations, and each is a record. The entry shows the unit, the flashing type and the last inspection date. If a trade installs new equipment, we inspect the flashings afterward and log the result, since a new curb on a warranted roof is a point the manufacturer may review.

Corners get close photographs. An inside corner at a wall and curb has several layers of membrane meeting at once, and a pinhole there lets water in for years before anyone sees a stain. Prefabricated corner pieces help, and we log which corners are factory-made and which were formed by hand.

Cold Weather Limits on Welded Membranes

Thermoplastic sheets stiffen as temperatures drop, and welding in cold or damp conditions needs care. Snow runs near 36.2 inches a year in Kenosha, and the January 1985 low reached minus 31 degrees. In those conditions, permanent welded repairs wait for dry surfaces and workable temperatures.

For winter leaks, we protect the interior, make a temporary repair with cold-applied products and log its limits. In spring, the permanent weld replaces it. Both entries stay in the file. The commercial roof repair history then shows how a detail was held through the winter and fixed after.

Hospital, Plant and Warehouse Roofs

Welded membranes appear on many building types. Healthcare roofs here range from the downtown Froedtert South Kenosha Medical Center Campus to Aurora Medical Center on the western edge of the city, along with St. Catherine's Medical Center, which opened in 2002, in neighboring Pleasant Prairie. Healthcare roofs carry rooftop equipment, infection-control limits and short shutdown windows.

Plants and warehouses bring other conditions: process exhaust, large fields, dock edges. The first visit confirms which membrane sits on each of these buildings before any work is recommended.

Outside Kenosha, the same record applies across the line. Healthcare buildings in the corridor reach past Kenosha; the Lovell Federal Health Care Center in North Chicago, about 20 miles south, opened in 2010. In the Racine County towns to the north, Racine manufacturers and Sturtevant warehouses present the industrial side. A program that spans them uses one format.

Planning Repairs and Renewal

The same evidence feeds the capital plan. A section with dry insulation and sound welds stays in maintenance. A section with repeated weld repairs, shrinkage at flashings and a wet core moves toward renewal. We show the quantities and conditions behind each recommendation, and the facility director chooses the timing.

Aging on a thermoplastic sheet shows as chalking, stiffening at edges and tension at corners. None alone ends service life, but a cluster in one section raises its rating, and the capital plan adjusts.

Thermal movement matters for planning. The recorded range from minus 31 degrees to 105 degrees means a sheet shrinks and relaxes each year, and fixed points such as curbs and walls take the strain. Where a section shows repeated tension at the same flashing, a repair may hold only a season. The rating then reflects the repeat, and the plan moves the section forward.

Warranty File and Close-Out Package

A Sika Sarnafil roof with coverage gets a warranty file built from the document, the installation records and each later visit. Each visit adds a dated photo set, a findings list and updated ratings. A repair adds the method and the weld record.

The close-out package goes to the facility director and can be attached to a capital request or forwarded to a lender. Other welded-membrane suppliers, such as Duro-Last, are tracked the same way.

Photographs in the close-out package are taken from the same positions each time. That habit makes a slow change, such as a seam edge lifting by a fraction of an inch across two winters, visible in a side-by-side comparison. It also gives the facility director a clear picture to show a finance committee.