Roof Replacement vs. Repair: How to Decide

November 4, 2024 · 7 min read · Repairs

Tile roof work in Palm Beach County — Tile roof work

Repair or replace: what actually decides it

Not every roof needs to be replaced. Some do, and patching them only delays the bill and adds a few more water stains. The decision comes down to four things: the condition of the waterproofing, how widespread the damage is, the repair history, and two county code rules that can make the choice for you.

Molsbee Roofing has made this call on Palm Beach County roofs since 1975. Here is how we work through it.

Is the problem in the covering or in the waterproofing?

This is the first question, and on a tile roof it matters most. The tile is the shield; the underlayment beneath it is what keeps water out. Attic heat ages that underlayment faster than the tile above it.

Cracked or slipped tile over sound underlayment is a repair.
Sound tile over brittle underlayment is the reverse: the roof has failed underneath while looking fine from the street.

On clay barrel tile, that second case does not always mean new tile. We can detach and reset: lift the tile, replace the underlayment and reset the same tile. Spalled clay, or a discontinued profile with no matching supply, pushes the answer toward replacement.

On a shingle roof, the covering and the waterproofing wear out together. Bare, curled or brittle shingles across the roof point to replacement; damage on one slope from a storm usually does not.

How widespread is the damage?

Points toward repair:

One slope or one detail, such as a vent boot, a wall flashing or a valley.
A storm-damaged section on a roof that is otherwise sound.
A failed component that can be replaced without disturbing much around it.

Points toward replacement:

Wear spread across every slope.
Soft or delaminating decking in more than one place.
Brittle underlayment wherever the roof is opened.

What does the repair history tell you?

A first repair is ordinary upkeep. When the same roof leaks in a new spot every rainy season, the pattern says the waterproofing is failing everywhere and the repairs are chasing it. At that point we tell you so, with photos of each area.

What is the quarter-roof rule?

This is the Florida Building Code rule, set by Florida Statute 553.844(5), that settles many of these conversations. If repairs, replacements or roof recovering cover more than a quarter of a roof system or section in any 12-month period, the code generally requires replacing or recovering the roof covering across that entire system or section to meet current code requirements. If that system or section was built, repaired or replaced in compliance with the 2007 Florida Building Code or a later edition, only the portion being worked on must meet applicable current code requirements. Our inspection helps determine which applies to your roof.

In practice, that means:

A large repair can grow into work on the whole roof system or section, whether you planned it or not.
The roof's own history matters, not the age of the house. Town permit records, such as Lake Worth Beach's Click2Gov lookups, show when the last roof permit was issued, and the inspection checks the existing roof.

Where a large patch crosses that line on a roof that does not meet the exception, the rule turns the repair into a replacement decision for that system or section. When the rule applies, we tell you before pricing the repair, not after.

What happens when the roof is replaced?

When the old covering comes off, the roof we specify puts a secondary water barrier on the deck before the new roof. The new roof is fastened for your wind band under the Florida Building Code, 8th Edition: 150 mph inland, 160 mph on the mainland, 170 mph on the barrier islands.

Do historic districts change the answer?

They can. In Boca Raton's Old Floresta, the guideline sets the order: repair first, then in-kind replacement, then something appropriate. In Lake Worth Beach's six historic districts, a certificate of appropriateness is needed before the permit, and the board has refused standing seam over an original metal-shingle roof; the replacement had to replicate the original look. In those neighborhoods, a careful repair is often the preferred outcome, not a compromise.

How we show you which way to go

Every decision starts with a free roof inspection. You get photos of the findings, including the underlayment wherever we can see it, and we say plainly which parts of the roof we could not confirm without opening it. Then you get a written scope with the price before any work starts. When both paths are reasonable, we write up both so you can compare them side by side.

For what goes into a replacement price, see roof replacement cost in Palm Beach County.

The team making the call

Molsbee Roofing has worked in Palm Beach County since 1975 under Florida certified roofing contractor license CCC1327429. Repair or replacement, the work is backed by our lifetime workmanship warranty and the manufacturers' product warranties. We are a GAF Certified Contractor and an Owens Corning Preferred Contractor, and after the work we can provide a roof certification letter for your insurer.