Mortar Failure at Hips and Ridges — Materials Compared
How a tile roof compares in North Hollywood once service life is counted, rather than on day one.
Comparisons between roofing systems usually get made on price and appearance, which are the two things that matter least in ten years. For a tile roof in North Hollywood, here is what the comparison looks like once service life is included.
What actually matters
The tile is not what keeps water out. The tile is a rain screen and a sunshade; the underlayment beneath it is the actual waterproofing, and it is the part with the shorter life.
The difference that shows up later
Two systems that cost within a dollar of each other on the quote can differ by a decade in service, and the difference is in the detail rather than the material. Bird stops, eave closures and the mortar at the ridge are what most quotes leave out. Leave them off and you have an open roof edge that invites nesting, debris and, in the fire zones, embers. Ask how it is fixed down and how it drains before asking what it costs.
How North Hollywood settles it
North Hollywood takes the full inland summer with very little relief after dark, and the ultraviolet load on a south-facing slope here is as hard as anywhere in the county. Asphalt ages from the top down under it: once the granules have gone the mat underneath turns brittle and starts to crack. Mostly single-storey post-war housing with later additions, which puts a transition detail in the middle of the roof where two eras of workmanship meet.
What we look at on an inspection
- Underlayment age and condition, checked by lifting tile rather than guessing
- Broken, slipped and previously face-nailed tiles across the field
- Batten condition and fixing, particularly at the eave course
- Sherman Oaks metal, which usually corrodes before the underlayment fails
- Ridge and hip mortar or mechanical fixing, and any movement in it
- Bird stops and eave closures, present and intact
- Flashing at walls, chimneys and every penetration through the field
Common questions
Which option is best overall?
There is no overall. There is best for this roof pitch, this exposure and this budget, and those three narrow it down fast.
Is the more expensive option always longer-lived?
Usually, but not always, and installation quality closes the gap in both directions. A well-installed mid-range system beats a badly installed premium one every time.
The honest summary
Judge a tile roof by its underlayment, not its tile. A roof that looks flawless from the driveway can be two winters from a ceiling repair, and the only way to know is to lift a few tiles and look. In North Hollywood the thing to watch is granule loss on the sun-facing slopes, and the junction where an addition meets the original roof.
Free inspection, drone photography where access is difficult, and a written estimate with deck repair priced per sheet. No obligation.
More on Tile Roofing
- Walking a Tile Roof Without Breaking It — Inspection NotesTile Roofing
- Matching Discontinued Tile Profiles in the LA Basin — What Changed This YearTile Roofing
- Spanish Revival Roofs: Restoring Without Ruining — The Short AnswerTile Roofing
- What a Tile Re-Felt Costs in Sherman Oaks — Common MistakesTile Roofing