Top 5 Signs Your Portland Home Needs New Siding
Joe Kelly
February 17, 2025

As a trusted siding contractor in the Portland area, we at Sister Siding understand that siding plays a crucial role in both the aesthetics and protection of your home. Whether you're dealing with the damp Portland climate or the wear and tear of time, siding can begin to show signs of distress long before it's apparent to the untrained eye. While it's easy to overlook small issues, putting off necessary repairs or replacement can lead to bigger, more costly problems down the line.
So, how do you know when it’s time to replace your siding? Here are the top 5 signs your home's siding might need an upgrade.
Dry-Rot and Water Damage
One of the most common problems we see with older siding is dry-rot. Dry-rot occurs when moisture seeps into wood siding, leading to a breakdown of the fibers, making it soft and crumbly. In Portland, with our frequent rain, homes are especially vulnerable to dry-rot if the siding is damaged or improperly sealed.
If you notice any soft spots or areas where the siding feels spongy to the touch, that’s a good indication of water damage. Left unchecked, this can lead to structural damage to the framework beneath the siding, which will be much more expensive to repair.

Mold and Fungus Growth
Due to our rainy, humid climate, Portland homes are particularly prone to mold and mildew growth on their siding. Mold thrives in moist environments and can often take hold in areas where there’s prolonged exposure to water or where the siding is in poor condition.
If you start noticing black spots, streaks, or a musty odor coming from your siding, this could be an early warning sign that mold or mildew is taking hold. Not only does this impact the aesthetic of your home, but it can also affect your indoor air quality and lead to health issues, particularly for those with respiratory conditions.

Soft or Spongy Areas
Soft spots on your siding, especially around the bottom of the walls or near corners, are a clear indication that the material has been compromised. This could be due to a combination of moisture damage and age, but it’s an issue that shouldn’t be ignored.
When the siding feels soft to the touch, it may have absorbed moisture over time, causing the materials to deteriorate. Over time, this can lead to more severe damage, such as rotting or structural instability. If the damage is severe enough, the siding may need to be entirely replaced to protect your home from further harm.

Cracks and Split Seams
The weather in Portland can be harsh on your home’s exterior, with constant fluctuations between wet and dry conditions. These changes in moisture and temperature can cause your siding to expand and contract. Over time, this natural movement can lead to cracks, splits, or separation between the seams of your siding.
If you notice any visible cracks or gaps in your siding, especially where it meets windows and doors, it’s time to take action. These openings not only allow moisture to seep into your walls, but they also create entry points for pests like termites, rodents, and insects. Seams that are split or cracked also reduce the energy efficiency of your home by letting in drafts, which can drive up your heating and cooling costs.

Warping and Buckling
Warping or buckling of your siding is another major indicator that it's time for a replacement. Siding should be flat and smooth against your home’s exterior, but over time, it can begin to warp due to moisture or temperature fluctuations. Warped or buckled siding not only looks unattractive, but it can also leave your home vulnerable to further water damage or pest infestation.
If you notice any areas of your siding that are sagging, bulging, or appearing to lift off the wall, it's important to address the issue promptly. These deformities can be a sign of underlying structural damage or improperly installed siding.

Why Choose Sister Siding?
At Sister Siding, we pride ourselves on providing high-quality siding installation, repair, and replacement services to homeowners throughout the Portland area. Whether your siding has suffered from water damage, mold, or simply the passage of time, our team of experts is here to help you choose the right solution for your home. We offer a wide variety of siding materials and styles to fit your budget and aesthetic preferences.
If you notice any of these signs on your home, it’s crucial to get a professional inspection. Don’t wait until small issues turn into costly repairs. Reach out to Sister Siding and keep your home safe, dry, and beautiful for years to come!