Do I need a new roof before solar?

Why the order matters so much

Panels are attached through the roof covering into the structure beneath. Replacing the covering underneath an existing array means detaching the array, storing it, re-roofing, and mounting it again — with new flashing and, often, new penetrations. It is labour, it is scaffolding twice, and it is a cost with no benefit attached: you end up with the system you already had.

Doing it in the other order costs nothing extra. The roof is being replaced anyway; the array simply goes onto the new covering.

How to judge remaining roof life

Asphalt shingle

The shortest-lived common covering in Florida, and the one where age matters most. A shingle roof well into its second decade is usually the case for re-roofing first.

Concrete or clay tile

The tile itself long outlasts an array, but the underlayment beneath it does not. A tile roof can look sound while the waterproofing layer is at the end of its life, and tile work is more expensive to disturb — so the question is the underlayment’s age, not the tile’s.

Metal

Usually the best case. Long service life, and standing-seam profiles can often be clamped rather than penetrated at all.

Flat or low-slope

Membrane life is the constraint, and ballasted or penetrating mounts interact with it directly. Get the membrane’s age and warranty terms before designing anything.

The Florida wrinkle

Roof age has become an insurability question in Florida independent of solar. Carriers have tightened what they will write and renew on older roofs. If yours is old enough that a solar installer is hesitating, it may also be old enough to matter at renewal — which can turn "should I re-roof before solar" into a decision you were going to face anyway, on a schedule set by someone else.

We are deliberately not putting numbers on that. Carrier appetite varies, changes, and is specific to your address and claims history. Your agent can tell you in one phone call what no solar website can tell you accurately.

How to sequence it if you are re-roofing

1. 1

   Tell the roofer solar is coming

   Mounting positions, reinforcement and flashing choices are cheaper to accommodate during a re-roof than to retrofit afterwards.

2. 2

   Get the solar design before the roof is closed up

   Knowing where the attachment points land lets the roofer prepare those areas properly rather than the array being worked around finished work.

3. 3

   Keep the two contracts separate unless one company genuinely does both

   A single price covering both trades can be good value or can bury the roof cost. Ask for it broken out either way.