Common Reasons Why Commercial Roofs Fail at the Seams

Proper seam installation is the secret to long-lasting rubber, thermoplastic polyolefin (TPO) and polyvinyl chloride (PVC) single-ply roofing. A good contractor also makes sure to use only quality products and the right equipment and installation methods prescribed by manufacturers.

Commercial roofs usually fail at the seams because of the following reasons.

Top Reasons for Commercial Roof Seam Failure

Weathering

Ultraviolet (UV) rays can eat away at your roof membrane. Plus, your roof withstands rain, snow and other weather elements all year round. Over time, it will shrink, become brittle and deteriorate. This is normal and means that your roof must be replaced soon.

Poor Insulation 

Your roof’s insulation prevents warping and humps under the membrane. If it is not properly secured to your roof, the insulation will warp and pull on the seams, creating tears in various areas. Make sure your insulation is properly installed and regularly inspected to spot any irregularities in this component.

Faulty Installation

The seams must be sealed properly so your roof doesn’t have any gaps. Remember that overlapping seams do not mean they are sealed correctly. Regularly check this part during roof inspection and maintenance.

Roof Membranes That Are More Prone to Seam Failure

These roof membranes are generally at greater risk of seam failure, so make sure to be extra attentive when it comes to their installation or maintenance:

• Torch-down: This type of roof membrane is sealed by heating its back side until it melts and fuses.
• Rubber form: This is a single-ply roof membrane that is typically glued or raped on.
• Modified bitumen: This roof membrane is sealed with either hot asphalt or cold adhesives.

You can always count on V. Nanfito Roofing & Siding to install your commercial roof properly. We ensure every roofing system we work on meets manufacturer and building code requirements. Call us at (203) 639-1634, or fill out our contact form for a free consultation.