Complete Roof Systems for Allentown Additions and New Builds
An addition on a hundred-year-old Allentown home has to meet a roof that was framed before anyone thought about ventilation or ice barriers. That intersection is where most new roofing work in this city actually happens: a new dormer tying into an old slope, a rear extension whose ridge lands below the existing one, a gut renovation where the framing is new but the neighbor's wall is not. Getting the tie-in right is the entire job.
This is roof installation as our Allentown, PA office does it — the same crew, the same number, the same written estimate before anything starts.
Installation starts at the deck, and on new work we are checking the framer's output before we cover it: sheathing gaps and fastening pattern, a clean and straight eave line, blocking where the fascia will carry gutter, and whether the soffit was framed with room for intake air. On additions we also verify that the new ridge and the old ridge can vent as one system rather than fighting each other. Once that is settled the sequence is fixed — drip edge, ice barrier, underlayment, starter course, field, hip and ridge — and every step laps the one below it.
New roofs fail for boring reasons. Nails driven high above the nail line, or overdriven so the head cuts the mat, and the shingle lets go in the first real wind. Starter course reversed so the sealant sits at the top of the eave instead of gripping the first row. A valley where the two planes have different pitches and the water crossing over undercuts the shingles. Kick-out flashing left off where a roof edge meets a wall, which is the single most reliable way to rot a wall cavity in silence. We install to manufacturer specification because that is what keeps the warranty alive.
If you are building, we would rather be in the conversation before the framing is closed in, because a two-inch change at the soffit is free on paper and expensive later. Expect a free consultation, an itemized estimate tied to your plans, and coordination with your builder's schedule so we are not roofing in the rain to hit someone else's date. What we will discourage: chasing an elaborate roof line for its own sake. Every extra valley, cricket and dead-end return is another detail that has to be flashed correctly and maintained for as long as you own the house.
Why Allentown roofs are different
Most genuinely new roof work in Lehigh County sits at the edges — the developments off MacArthur Road in Whitehall, the newer stock around Center Valley, and additions spreading south toward Emmaus. Inside Allentown itself, new roofing means renovation: a third-floor build-out under an old slate-pitch roof, a rear kitchen addition squeezed against a party wall, a garage rebuilt off a Center City alley. The constraint is almost never the open roof. It is the six feet where new framing meets a wall someone else owns.
- All Pro Roof Stone Atlas
- Address: 429 S West St, Allentown, PA 18102
- Phone: (484) 806-0911
- Hours: Open 24 hours, seven days a week
- Licensed & insured in Pennsylvania — #PA052821
- Serving: Allentown and Lehigh County
- Identifies as women-owned
Other roofing work we do in Allentown
Roof Repair in Allentown · Roof Replacement in Allentown · Metal Roofing in Allentown · Gutter Installation & Guards in Allentown · Storm Damage Roof Repair in Allentown
Roof Installation in nearby markets
Roof Installation in Exton · Roof Installation in Lancaster · Roof Installation in Media · Roof Installation in Carlisle
Read the full roof installation service page for the technical detail that applies everywhere we work, or see everything we cover across Lehigh County.
Towns our Allentown office covers
Roof Installation in Allentown
What Allentown customers say5.0★ from 16 Google reviews
“The team provided dependable roofing work with attention to quality and customer needs. The completed project looks excellent.”
“Our roof replacement was completed professionally, and the crew treated our property with respect throughout the job.”
“A great choice for anyone needing experienced roofing help. The crew was knowledgeable and focused on delivering quality work.”
Roof Installation in Allentown — common questions
Can you match a new addition's roof to the existing shingles on my Allentown home?
Sometimes closely, rarely exactly. Shingle lines change, and an existing roof has already weathered, so even the same product reads differently next to it. Where the two planes are visible together we usually recommend reroofing the adjoining slope so the transition is deliberate rather than accidental. Where the addition faces a different direction and is not seen alongside the original, a close match is fine and costs less.
What roofing works on a low-slope rear addition?
Below about a three-in-twelve pitch, shingles are the wrong product no matter how well they are installed, because water moves too slowly to shed before it works under a lap. Those roofs want a membrane: TPO, EPDM, or modified bitumen, seamed and terminated properly at the wall. Plenty of Allentown homes have exactly this condition over a rear kitchen or porch, with steep shingle above and flat behind.
Do you work with builders and general contractors in the Lehigh Valley?
Yes, on new construction, additions and full renovations across Lehigh County and the surrounding boroughs. We work from your plans, hold to a scheduled window, and coordinate around framing and inspection dates so the structure is not left open longer than it should be. We are licensed in Pennsylvania, bonded and insured, and can provide documentation for your project file before we mobilize.
How much ventilation does a new roof actually need?
Balance matters more than volume. Exhaust at the ridge only works if there is matching intake at the eaves, and on older Allentown houses the soffits are frequently blocked by insulation or sealed under decades of paint. We open and screen real intake before adding ridge vent. Without it, the ridge pulls air from inside the house, which raises humidity in the attic and shortens the life of the sheathing and the shingles above it.
Can you install a roof on a garage or detached structure?
Yes. Detached garages, carriage houses off the alleys behind Center City blocks, sheds and porch roofs are all normal work. The details are the same as a house — drip edge, ice barrier where required, correct starter and proper flashing at any wall — just on a smaller footprint. The one thing we watch on alley structures is drainage, since the runoff has nowhere to go except a neighbor's property line.
Roof Installation in Allentown? Call (484) 806-0911.
Free, no-obligation estimates. Licensed & insured in PA, NJ, MD & DE.