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Siding installation project near Portland, OR

Exterior Services

Siding Installation & Repair in Portland, OR

Replacing rot-prone siding and weatherproofing homes against Oregon's rain — with a proper weather barrier behind every installation.

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Why Siding Fails Faster Here

Siding in the Portland metro deals with a specific set of problems drier climates don't: sustained wet-season moisture, moss and algae growth on shaded north-facing walls, and — on a lot of older homes — original cedar siding that was never installed with a modern weather-resistant barrier behind it. Once moisture gets behind older siding, it often doesn't fully dry out before the next round of rain, which is how isolated rot spreads into a bigger problem.

We see this most in established neighborhoods with mature tree cover that keeps walls shaded and damp longer, though newer homes in sunnier subdivisions aren't immune — poor original installation can cause the same issues regardless of age.

Signs Your Siding Needs Attention

  • Soft, spongy, or visibly rotted sections, especially near the ground or window trim
  • Persistent moss, algae, or dark staining that keeps returning
  • Warping, cracking, or gaps between boards or panels
  • Paint that won't hold no matter how often it's redone
  • Rising energy bills that hint at a compromised weather barrier

Our Siding Process

  1. Assess the damage. We check how far rot or moisture intrusion has spread before scoping repair vs. replacement.
  2. Remove old siding. Damaged sections or the full wall are stripped down to the sheathing.
  3. Repair sheathing if needed. Any water-damaged sheathing underneath gets addressed before new siding goes on.
  4. Install weather barrier. A proper moisture barrier goes in before the new siding.
  5. Install new siding. Fitted, fastened, and finished per manufacturer specs.
  6. Final walkthrough. We walk the finished siding with you before the job is done.

What Affects the Cost

Total square footage, material choice (fiber cement vs. vinyl vs. wood), and how much sheathing repair is needed underneath drive most of the cost. A repair limited to a small damaged section costs far less than a full-wall or whole-house replacement. We'll assess your specific siding before quoting.

Why Portland Homeowners Choose Us for Siding

All City Exteriors LLC is licensed, bonded, and insured (CCB #253959). We install a proper weather barrier on every job and won't cover up sheathing damage instead of repairing it — a siding job that traps existing moisture problems isn't a fix, it's a delay.

We handle siding work throughout Portland and nearby Canby — if you're outside either area, give us a call and we'll tell you honestly whether your property is in range.

Frequently Asked Questions

How do I know if my siding needs repair or full replacement?
Isolated rot, cracking, or damage in a small area is often repairable; widespread rot, warping across multiple sections, or siding that's simply reached the end of its lifespan usually makes full replacement the better long-term value. We'll give you an honest assessment rather than push a full replacement when a repair will do.
Why does older cedar siding rot in the Portland area?
Cedar siding was standard on a lot of older Portland-metro homes, but without a proper weather barrier and regular maintenance, it absorbs moisture during our long wet season and doesn't fully dry out before the next rain — leading to rot, especially near the ground and around window trim.
What siding materials hold up best to Oregon weather?
Fiber cement siding has become the most common upgrade we install because it resists moisture, doesn't rot, and holds paint well over time. Vinyl is a lower-cost, low-maintenance option. We'll walk through what fits your home and budget.
Do you install a weather barrier behind new siding?
Yes — a proper weather-resistant barrier behind the siding is standard on every installation, not an upsell. It's one of the most important layers for keeping moisture out of the wall assembly in our climate.
Can you match siding color and style if I only need a section replaced?
In most cases yes, if the existing material and color are still available or closely matchable — we'll tell you honestly if an exact match isn't possible before starting the job.

Related Services

Dealing with Rotted or Aging Siding?

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