How we replaced two aging shingle roofs on 45th Street in City Heights

The shingles on this property were old asphalt three-tab, and they had reached the point where every part of the system was failing at once, not just one spot. That is the line we look for. A single bad flashing detail or a cracked vent boot is a repair. Shingles that are worn thin across both units, curling at the edges, and starting to fail in multiple places is a replacement conversation.

We get this question a lot on older San Diego homes: can you just patch the bad section and leave the rest? Sometimes, yes. On this one, no. The wear was spread across both roof planes, and patching one corner would have left the homeowner paying for a new problem within a year or two. If you are not sure which side of that line your own roof is on, our roof inspection service is built to answer exactly that question before you spend a dollar.

We started this job with a complete tear-off of the existing shingles, all the way down to the decking. That is not the fast way to do a re-roof, and it is not the cheap way either, but it is the only way to actually see what you are building on top of.

What a full tear-off lets us do

• Catch hidden decking damage before it becomes a structural repair.
• Make wood repairs where the sheathing has softened, instead of nailing new shingles into it.
• Install underlayment and flashing correctly, on a clean, flat surface.
• Build a roof that is actually rated to last, rather than one hiding a weak base under a new layer.

Once the old shingles came off, we found sections of decking that needed to be replaced, which is very common on older City Heights properties. A lot of the time, that damage is invisible from above or from inside the attic until the roof is fully opened up. That is exactly why we do not skip this step and do not offer to install over old shingles just to save a day of labor.

This property is a good example of what we see across a lot of the 92105 area. Homes here tend to be original construction with multiple past roofing jobs layered over the decades, and that history often includes shortcuts. A previous repair or install that skipped proper flashing, or that trapped moisture instead of sealing it out, eventually shows up as soft or damaged wood underneath.

1. 1We inspected the entire deck surface after tear-off, checking for soft spots, delamination, and water staining.
2. 2Damaged sections were cut out and replaced with new sheathing, matched and fastened to code.
3. 3We rechecked every repaired section before laying underlayment, since covering a bad patch is worse than finding it.

You won't always see decking problems until the roof is fully opened up. That's exactly why we don't skip this step.

Once the decking was solid, we installed a complete asphalt shingle roofing system across both units. Roofing in City Heights, like most of San Diego, means dealing with near-constant sun exposure, and that sun is what dries out and weakens shingles over time. Good installation matters just as much as the shingle brand itself when it comes to how long a roof actually lasts.

What we installed on this job

• New roofing underlayment across the full deck.
• Flashing at every vent and roof penetration.
• New asphalt shingles across both units, laid with straight, consistent courses.
• Ridge components to keep proper attic ventilation, which helps the new shingles hold up longer.

Each of those layers does a specific job, and skipping any one of them is how a roof that looks fine on day one starts leaking in year three. For homeowners weighing this same decision, our roof replacement page breaks down what a full system install includes, and the NRCA publishes homeowner-facing guidance on what a properly built shingle roof assembly should include.

A lot of the roofs we replace in City Heights show the same patterns, which is part of why we know what to expect before we even get on the ladder.

• Worn-out or curling shingles from years of direct sun exposure.
• Small leaks that go unnoticed until they spread across a wider area.
• Soft or damaged decking hiding underneath an intact-looking surface.
• Poor attic ventilation left over from older installs, which shortens the life of whatever roof goes on next.

Because of San Diego's climate, roofs in this part of the city tend to age faster than a lot of homeowners expect. A small, ignored issue can turn into a full tear-off if it sits long enough, which is why catching it early with a roof repair visit is almost always cheaper than waiting.

By the time we wrapped up, both units at 4182 & 4184 45th Street had brand new shingle roofs installed from the decking up. That is exactly the outcome we aim for on every project.

• Clean, straight shingle lines across both roof planes.
• A properly sealed roofing system, including flashing and ridge ventilation.
• Strong long-term durability built on repaired, solid decking.
• A noticeable visual upgrade to the whole property.

You can genuinely see the difference between where this roof started and where it ended up, and that transformation is a big part of why these are the jobs we like sharing. If you want to see more finished work like this, our project gallery has photos from similar replacements around the county.

City Heights is a unique part of San Diego when it comes to roofing work. A lot of the homes are older, which usually means original structures, multiple past repairs, and roofing systems that were layered over each other across decades instead of properly replaced.

Compared with newer areas of the county, roofs here typically need more detailed inspection and repair work during a replacement. That is exactly why having a crew that takes the time to open the roof up and rebuild it properly, rather than rushing to lay new shingles over old problems, matters more here than it might elsewhere. We work across the wider region too, and our areas served page has the full list of where we take on projects like this one.