Moisture below the roofing membrane can potentially cause a lot of damage to a roofing system. It can lead to such issues as loss of thermal performance and compressive strength. Moisture-sensitive and organic materials can deteriorate and speed up the deterioration process of the structural roof deck and roof structure.
Thermal movement causes the membrane to shrink and pull from the flashing and roof. This can cause lashing to fail due to wind uplift forces. The membrane also shrinks due to loss of processing oil and residual tensile stress. It’s also caused by insufficient relaxation of the sheets before installation. Fastening the membrane at the roof perimeter and at penetrations reduces shrinkage. Termination bars reduce loads at fasteners and can resist shrinkage better than adhesives.
Water Vapor Condensation
Water vapor flowing on a roof system can condense into liquid water in a colder area. A vapor retardant can prevent water vapor from reaching such areas and significantly reduce condensation. Ask your roof maintenance provider how they can help stop moisture penetrating your roofing membrane.
Lack of Redundancy
As the name implies, single-ply membranes rely on only one layer to prevent leaks. Reliability has improved a lot within the last two decades for EPDM. This is due to advances in factory-fabricated seam tape technology. However, compared to multi-ply systems, single-ply membranes lack redundancy. They are also less resistant to mechanical damage by traffic, punctures and chemicals.
To address these, your roofer can do mock-ups and thorough inspections of single-plied seaming during construction. They will then use traffic mats where you expect regular foot traffic. Furthermore, they’ll sure to select a membrane that is resistant to the site conditions.
Pressure Point Roofing Eugene, LLC., offers the highest quality products and roof repair services. It’s our mission to put a decent roof over your head. We have established a strong and dependable presence in Eugene, OR. Reach out to our staff by calling (541) 393-8183 today.