Roof leak repair in Phoenix that finds where the water starts

On tile, the visible surface is not the waterproof layer. The underlayment beneath does that job, and tiles are mostly sun and wind protection. Water that slips past a cracked or shifted tile runs down the felt until it finds a tear, a nail hole or a gap at a flashing, then drops through. So we start at the stain, measure its position from the walls, and then lift tiles upslope from that point until we find wet felt or a stain trail on the deck.

Valleys, the low points where two slopes meet, are the most common culprit, followed by the edges around chimneys, vents and solar mounts. Debris and dust build up in valleys and slow water down, which lets it creep sideways under the tiles. If the felt is brittle across the whole roof, finding one hole is only part of the answer, and our underlayment replacement service may be the lasting fix.

On a foam or flat roof, the surface is the waterproof layer. Leaks usually come from cracked or worn coating, bird pecks, foot traffic damage, blisters, or water that ponds because a scupper is blocked. Water on a flat roof can travel inside the roof layers before it finds a way down, so the entry point is often some distance from the drip. We look for soft spots, coating cracks and low areas where water sits.

Foam roofs need recoating every 5 to 10 years depending on the coating, and many leaks we see trace to a coating that has simply worn thin. If the foam beneath is dry and sound, a recoat solves it. If it is wet or crushed, that section is cut out and refilled first. Our foam recoat page explains how we decide between a spot repair and a full new coat.

Shingle leaks tend to be easier to find but easier to get wrong. A missing tab is obvious. A nail that backed out under a shingle, lifting it just enough to wick water, is not. Heat in the Valley makes shingles soft in summer and brittle in winter, and the seal strips that bond each course can let go after a few years. We check the nail line, the step flashing along walls and the drip edge at the eaves.

Where a shingle roof meets a stucco wall, the flashing should tuck behind the stucco or a counterflashing. Many homes have flashing that was simply caulked to the wall face. That caulk fails in the sun, and water runs down behind the shingles. Fixing that properly means cutting a groove or adding a metal counterflashing, not adding more caulk. A proper counterflashing sheds water on its own and does not depend on sealant at all.

Some leaks only show in wind-driven rain, which is common during monsoon cells. When tracing does not reveal a clear source, we run a controlled water test: we soak one small area at a time with a hose, starting low and moving up, while someone watches inside. It takes patience, but it isolates the exact point instead of guessing. It is the slowest part of leak work and often the most valuable.

Water testing works best on a dry day so new water is easy to spot. We do not test right after a storm, when everything is still damp. If you want to understand roof condition more broadly first, a full roof inspection looks at every slope and gives you photos of other areas that may leak next. A test also confirms the repair: after the fix, we run water over the same spot to make sure it stays dry inside.