Repair & Replacement
Can you put a new roof over an old one?
Short answer
A second layer is sometimes permitted by code, but it hides deck problems, traps heat that shortens shingle life, adds weight under snow load, and makes the eventual tear-off more expensive. It also disqualifies the roof from rejuvenation.
Why overlays are tempting
Skipping tear-off and disposal shaves a noticeable amount off a replacement quote, which is why the option keeps coming up when budgets are tight.
What it costs you
- Nobody inspects the deck, so rot stays hidden and keeps spreading
- The added layer runs hotter, aging the new shingles faster
- Flashing details are harder to do correctly over an existing layer
- Snow load plus two layers is real weight on an older frame
- The next tear-off removes two layers and costs more
The rejuvenation angle
We decline multi-layer roofs. There's no way to assess what's happening under the top layer, and the treatment can't compensate for a deck nobody has seen in twenty years. If you're weighing an overlay, it's worth checking first whether the existing roof qualifies for rejuvenation instead.
See if your roof qualifies
Six quick questions about your roof, and an honest read on whether rejuvenation is likely to be a fit for it.
2-minute self-check
Answer six questions from the ground.
This won't replace an on-roof inspection, but your answers shape the recommendation you'll get at the end — including when rejuvenation isn't the right call. "Not sure" is a fine answer.
1.Is your roof roughly 8–25 years old?
2.Do you have any active leaks or interior water stains?
3.Are there shingles missing, cracked through, or hard-curled in sections?
4.Do you see granules collecting in gutters, or fading and dry-looking shingles?
5.Do any roof planes sag, or does the decking feel soft?
6.Does the roof have more than one layer of shingles?
0 of 6 answered — your personalized result appears when you finish.
Before you replace — see if you qualify.
A free roof assessment tells you whether your asphalt shingles still have serviceable life. If they don't, we'll say so and point you to a roofer we trust.