EPDM roofs can last for many years, but a lack of maintenance can lead to shrinkage that will reduce their lifespan and performance. To prevent this, always store high-quality materials properly before use. Avoid overstretching the membrane and follow correct installation procedures.
Use the compatible adhesives, nail all edges and flashing securely, and consider adding ballast or walk pads to minimize shifting. Regular inspections can detect early signs of wear, and reflective coatings offer effective UV protection. Also, proper water drainage must be ensured to prevent pooling and liquid damage. Following these steps during EPDM roofing installation is essential to prevent shrinkage.
Tips to Prevent EPDM Roof Shrinkage
Follow these strategies and tips to prevent shrinkage in your EPDM roof:
Tip 1: Selecting a Good Quality EPDM Membrane
Always choose a high-quality EPDM membrane when purchasing a roofing kit. The first step to prevent shrinkage is to choose the best single-ply EPDM membranes sourced from a reputable manufacturer. Low-grade or cheaper materials lack the UV resistance, flexibility, and durability needed for long-term use. A good membrane can resist environmental wear and tear, which significantly decreases the chance of shrinkage over time.
Tip 2: Properly Store Materials Before Installing Them
Remember that the condition of the new EPDM membrane can affect the outcomes of the installation process. Always keep the membrane in a cool, dry, shaded area. Direct sunlight or excessive temperatures can weaken the material before applying it to the roof. Store the rolls flat and above the ground to prevent deformation or bending, which can affect membrane performance.
Tip 3: Adhere to Proper Installation Methods
Improper installation is a leading cause of EPDM shrinkage. When installing EPDM roofing, it is important to follow the manufacturer’s instructions and the best industry practices. The membrane should be smoothly placed without wrinkles, pleats, or air pockets. Installation errors can lead to shrinking, cracking, or leaking.
Tip 4: Select the Right Adhesives and Sealants
The adhesive you choose is as critical as the membrane you use. Good adhesion is essential when installing rubber membranes on low-slope roofs. Using general-purpose or low-quality adhesives results in poor bonding and increases the risk. Therefore, you should use only factory-approved adhesives and seam sealers for the best outcomes.
Tip 5: Secure Seams, Edges, and Flashings Completely
One of the earliest spots where shrinkage is visible is in the perimeter and flashing. If these areas are not properly sealed, they can lift over time, leaving the roof vulnerable to rain and wind damage. To prevent movement, support all corners, seams, transitions, and openings with additional membrane layers or secure with mechanical fasteners. Heavy edge detailing provides less tension and prevents the membrane from pulling inward.
Tip 6: Don’t Overstretch the Membrane
While it seems like a good idea to secure the membrane as tightly as possible during installation, remember that overstretching the membrane increases the probability of shrinkage over time. EPDM is meant to stretch and shrink on its own. If you stretch it too far during the installation, it can retract over time. Instead, lay the membrane flat and leave a margin to let it adjust to temperature changes.
Tip 7: Install Ballast or Walk Pads
Loose-laid systems can also be ballasted with gravel or pavers to help secure the membrane and minimize wind uplift. To reduce stress on the membrane, use protective walk pads on high-traffic areas. These additions prevent roof sliding and movement, offering protection from tearing, stretching, or shrinking.
Tip 8: Regularly Inspect and Maintain the Roof
Regular upkeep is necessary to spot EPDM roof shrinking or other problems early. Inspect the roof for raised seams, exposed flashing, wrinkles, and pooled water. Fix these minor issues before they turn into major damage. Routine cleaning also eliminates the accumulation of debris, which can hold moisture and damage the membrane.
Tip 9: Apply UV-Resistant Coating
EPDM is UV resistant to a point, though after prolonged UV exposure over several years, it might require an extra UV-resistant coating for added protection. A white roof coating or reflective paint protects the membrane by reflecting sunlight and decreasing surface temperature. This extra protection prolongs the life of the roof and benefits the energy efficiency of the building by offering a cooler interior.
Tip 10: Ensure Adequate Drainage
One of the biggest issues people have with their flat or low-sloped roof is ponding water. Pooling water can damage the adhesive coatings and promote mold and mildew. To prevent ponding, ensure your roof has a slope and an obstruction-free water exit system for proper drainage. The more scuppers or drains in the flat roof, the less chance of moisture-related shrinkage.
Conclusion
Proper installation and maintenance are key to maintaining EPDM roofing. Always use quality materials stored under the best conditions, and do not overstretch the membrane while installing. Compatible adhesives and ensuring full coverage around all edges and flashing are crucial. Protect the surface from UV light by applying a reflective coating.
Also, allow optimal drainage to prevent water ponding and roof deterioration. Regular servicing and maintenance enable you to solve problems early and prevent further damage. Considering these steps during your EPDM roofing installation can enhance its performance and lifespan.
