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Dallastown Roofing & Contracting
Mid-install low-slope roof transition on a Dallastown Roofing project

Low Sloping Roof Installation

A low-slope roof — typically anything between 2:12 and 4:12 — needs a system designed for slow drainage. We install modified bitumen and rubber membrane roofs that hold up where shingles would not.

  • Modified bitumen or rubber membrane systems
  • Proper underlayment for slow-drainage decks
  • Seamless transitions to adjacent steep slopes
  • Engineered for additions, porches, and dormers

Why "low slope" is its own roofing job

Once a roof drops below about 4:12, shingles start to fail because water lingers long enough to creep up under each tab. Low-slope roofs need a continuous water barrier — modified bitumen torch-down, peel-and-stick membranes, or rubber single-ply.

Common low-slope situations

Porch roofs, dormer cheeks, sunroom additions, garage roofs, and breezeways are the usual suspects. We frequently combine a low-slope membrane on the flat section with shingles on the steep section above — done correctly, the transition is invisible from the ground.

What you should expect from the install

A proper low-slope job includes ice & water shield across the entire deck (not just eaves), correct drip edge, fully flashed wall terminations, and a membrane bonded or fastened per the manufacturer's spec — not whatever was sitting on the truck.

What's included

  • Tear-off of existing low-slope roofing
  • Full deck inspection and repair
  • Ice & water shield over entire low-slope area
  • Modified bitumen, EPDM, or TPO membrane
  • All wall and chimney flashing
  • Properly terminated drip edge and edge metal
  • Transition detail to steep-slope shingled sections
  • Cleanup and warranty paperwork

Get a free estimate today.

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