Pennsylvania · Roofing guide
How to build a roofing in Pennsylvania
Shingle or metal re-roof with tear-off, dry-in and disposal. A re-roof is the highest-value exterior job on a house and the least forgiving. Squares, pitch and disposal drive the whole number, and fall protection is not optional.
Typical cost
$2,610–$4,145
Time
2–4 days with a crew
Skill
Advanced
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Permits & code in Pennsylvania
Re-roofs require a permit in nearly every jurisdiction, with a sheathing inspection after tear-off. Codes cap asphalt at two layers, and cold-climate rules here (frost line 36") come with ice-barrier requirements at the eaves.
State-level rules only — cities and HOAs frequently add stricter requirements. Always confirm with your local building department before you dig.
What most people get wrong
- Ordering by footprint instead of pitch-corrected area — a 6/12 roof is 12% bigger than the floor under it.
- Nailing too high, above the nail line. The next course doesn't cover the nail and the shingle lifts in the first storm.
- Skipping ice and water shield in valleys. Valleys carry twice the water of any other part of the roof.
The 5-step roofing plan
- Step 1Confirm site and permit pathLocate property lines, call 811 for utility marking, and check whether your city/HOA needs approval before you break ground.
- Step 2Order materialsUse the shopping list from our planner. Confirm delivery vs pickup — bulk lumber and concrete are usually cheaper delivered.
- Step 3Lay out and prep the siteBatter boards, string lines, level the base. Getting this right saves days later.
- Step 4Frame the structureFollow the cut list. Check for square with the 3-4-5 method every few pieces. Fasten with the right structural screws.
- Step 5Finish and inspectSand, stain/seal, and (if required) schedule your final inspection before backfilling or closing anything up.
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