Roof Replacement vs. New Roof: What's the Difference?
In roofing, 'roof replacement' and 'new roof' are often used interchangeably — both refer to the complete removal of existing roofing materials and installation of a new system from the deck up. The term 'new roof' is sometimes used for first-time installations on new construction, while 'roof replacement' specifically describes removing an existing roof and installing a new one. In both cases, Pittsabana's process is the same: complete tearoff, deck inspection and restoration, premium underlayment, CertainTeed shingle installation, and full warranty activation.
Terminology Clarified
The roofing industry uses several related terms that can confuse homeowners. A 'new roof' typically means installing a complete roofing system — either on new construction or as a full replacement of an existing roof. A 'roof replacement' specifically means removing all existing materials and replacing them with new products. A 're-roof' or 'overlay' means installing new shingles over existing ones WITHOUT tearoff — a practice that Pittsabana does not recommend because it hides potential deck damage, adds weight, and voids many manufacturer warranties.
Why Full Tearoff Is Always Better
Some contractors offer 'overlay' installations — laying new shingles directly over old ones to save the cost and time of tearoff. While this seems appealing, it creates serious problems. Overlays hide rotted decking, moisture damage, and inadequate ventilation. They add significant weight to the roof structure. CertainTeed's SureStart Plus warranty requires complete tearoff for full coverage. And Allegheny County building codes limit roofs to two layers maximum. Pittsabana always performs complete tearoff on every project — this is the only way to guarantee a quality result.
- Full Tearoff + New Roof — Pittsabana's standard: complete deck inspection, all issues addressed, full warranty
- Overlay (NOT recommended) — Hides problems, adds weight, limits warranty, violates code if 2+ layers
What Pittsabana's Roof Replacement Includes
Every Pittsabana roof replacement follows our proven 6-step process. Step 1: Professional inspection with photo documentation. Step 2: Detailed written proposal with itemized pricing. Step 3: Material selection with physical CertainTeed samples. Step 4: Installation by W-2 employee crews — complete tearoff, deck inspection/restoration, ice and water shield, synthetic underlayment, CertainTeed shingles, all flashing, ridge vent, and drip edge. Step 5: Complete cleanup including magnetic nail sweep. Step 6: Final walkthrough and CertainTeed SureStart Plus warranty activation.
Frequently Asked Questions
Is a roof replacement the same as a new roof?
Essentially yes — both involve installing a complete new roofing system. 'Roof replacement' specifically means removing the existing roof first, while 'new roof' can also apply to first-time installations on new construction. Pittsabana performs complete tearoff and full system installation on every project.
Should I get an overlay or a full roof replacement?
Always get a full replacement with complete tearoff. Overlays hide deck damage, add structural weight, and limit manufacturer warranty coverage. Pittsabana only performs full tearoff installations to ensure quality results and SureStart Plus warranty eligibility.
Need Expert Advice for Your Roof?
Pittsabana's CertainTeed-certified team provides free inspections and honest assessments for Pittsburgh-area homeowners.