Roof Repair or Replacement? A San Antonio Decision Guide

This is the question that costs the most to get wrong in either direction. Replace a roof that needed a repair and you have spent a lot of money you did not need to spend. Repair a roof that needed replacing and you have spent money on something that will not hold.

Here is what actually goes into the answer.

Why age is the wrong starting point

Roofs get quoted for replacement on the basis of age all the time. It is an easy sell, because it sounds objective.

The problem is that two roofs installed in the same month can be in completely different condition. What separates them:

• How well it was installed. Fastening, flashing detail, and whether the manufacturer’s instructions were followed.
• What has hit it. A roof that has taken a serious hail event is not comparable to one that has not.
• Attic ventilation. Heat and moisture trapped underneath work on a roof from below.
• Orientation. The slope taking the most direct sun ages faster than the one that does not.

Age is a good reason to go and look. It is not the finding.

The four questions that decide it

1. Is the damage contained or spread?

This is the big one. If the problem is one valley, one section of flashing, one area where a branch came down, that is a repair. Fix the cause, confirm the surrounding area is sound, done.

If the same condition appears on every slope, a repair fixes one instance of a problem you have everywhere. You will be back.

2. Is the decking still sound?

The decking is the wood the roof is fastened to. Water that has been getting in for a long time softens it.

A soft patch is a repair. Decking that is compromised across an area is not, because there is nothing solid to fasten a new covering to. This is also the part nobody can fully assess until the covering comes off, which is worth knowing before anyone gives you a fixed number for a tear-off.

3. Have repairs been holding?

If the same area has been addressed twice and the water is back, the question is no longer how to repair it. Either the cause was never found, or the roof around it is failing. Both are worth knowing.

4. Has the covering reached the end of its service life?

Not age. Condition. Widespread granule loss so the surface looks bare. Shingles that are brittle rather than flexible. Curling and cracking across slopes rather than in patches. At that point a repair is holding together material that is failing on its own schedule.

Manufacturers publish inspection and installation guidance for their own products, and where a specific product is involved, that guidance is the authority on it rather than a general rule of thumb.

What the evidence looks like

Points toward repair: the problem is in one place; the rest of the roof looks consistent and intact; the decking is sound apart from a defined area; there is an identifiable cause, such as a failed pipe boot or flashing.

Points toward replacement: the same condition on every slope; decking compromised across an area; repeated repairs in the same place that keep failing; widespread granule loss and brittleness.

Comparing two estimates

If you have a repair estimate and a replacement estimate, they are not really comparable as numbers. They are answers to different questions, and the useful comparison is between the reasons.

Ask each one:

• What did you find, specifically, and where? Not “the roof is shot”. Which slope, what condition, what caused it.
• What is the condition of the decking, and how do you know?
• If this is a repair, what makes you confident the rest of the roof has life in it?
• If this is a replacement, what specifically rules out a repair?
• What is in the scope, in writing?

A contractor who can answer those has looked at your roof. One who cannot has looked at your address.

Permits

A repair and a re-roof are not the same thing for permit purposes. In San Antonio, re-roofing work can require a permit through the City’s Development Services Department, and what applies depends on the scope, the pitch, whether the material is changing, and related trade work. Current requirements are published on the City’s residential permits pages.

If a replacement is on the table, factor the permit process in from the start. There is more on it in Do you need a permit to re-roof a home in San Antonio?

A note on insurance

If a storm is involved, coverage is between you and your insurer, decided by your policy. No contractor can tell you the outcome of a claim before it is filed, and one who promises you an outcome is telling you something they cannot know. For consumer questions about insurance in Texas, start with the Texas Department of Insurance.

Get a straight answer about your roof

We would rather tell you a roof can be repaired, and we will tell you when it cannot. Either way you get what we found in writing, so you can question it or take it elsewhere.

Call (210) 468-8279, or read more about roof repair and roof replacement.