flashing PVC vent pipe steep slope

The Penetration Seal: Elastomeric EPDM Collars, Shingle Lapping Physics, and Thermal Pipe Expansion on Sloped Roofs

• September 30, 2026
• admin

In residential villa construction, resort layouts, and commercial steep-slope envelopes across South India, a typical roof plane is punctuated by numerous service penetrations: soil and waste vent pipes (plumbing stacks), HVAC refrigerant lines, solar thermal circulation tubes, and electrical service conduits. While a broad, unobstructed field of architectural shingles sheds sheet water smoothly down to …