Blaine Siding Ask five siding contractors what a replacement job costs and you'll get five different answers, because the honest answer is "it depends." The number on a bid isn't really about the material alone. It's about your home's shape, what's underneath the old siding, how the crew handles moisture detailing, and how well the finished product holds up to Whatcom County weather over the next twenty years. Understanding what drives the price helps you compare bids that look wildly different and figure out which one is actually the better deal.
What Actually Drives the Price
Square footage matters, but it's rarely the biggest swing factor. A few things move the number more than homeowners expect:
- Home shape and complexity. A simple rectangular ranch is straightforward. A home with multiple gables, dormers, bump-outs, and lots of corner trim takes more labor and material waste per square foot than a plain box, even if the total footage is similar.
- Tear-off versus install-over. Removing old siding down to the sheathing costs more up front than installing new siding over what's there, but it's the only way to check for hidden rot and correct the water-resistive barrier. In a wet climate like this one, what's happening behind the old siding matters as much as what goes on top.
- Moisture and flashing detail work. Proper flashing at windows, doors, and roof lines, plus correctly lapped house wrap, takes real time to do right. It's the least visible part of the job and the part that determines whether water gets behind the siding five years from now.
- Access and stories. Two-story homes and homes with limited access need more scaffolding and staging, which adds labor hours regardless of siding type.
- Permits and code requirements. Local permitting adds a line item to most legitimate bids. A contractor who skips this to shave a number off your quote is cutting a corner that can come back on you as the homeowner.
Material Choice Changes the Math
Siding materials sit at different price points, and it's worth understanding why before you compare bids purely on the bottom line:
| Material | Typical upfront cost | What drives long-term cost |
|---|---|---|
| Vinyl | Lowest | Shorter service life in driving rain and wind; can crack, fade, or warp over time |
| LP SmartSide (engineered wood) | Low to mid | Wood-based core is more sensitive to moisture exposure at cut edges and seams; needs diligent caulking and paint upkeep |
| Fiber cement (James Hardie) | Mid to higher | Non-combustible, engineered for wet coastal climates, factory-baked ColorPlus finish reduces repainting |
The cheapest material up front isn't necessarily the cheapest material over the life of the siding. That's especially true here, where salt air off the water, driving rain, and a long moss season put real stress on anything with a wood-fiber core or a painted surface that isn't factory-cured.
The Cost You Don't See on the Bid
A siding bid tells you what you'll pay to install it. It doesn't tell you what you'll pay to maintain it. That's the number homeowners in Blaine and the rest of Whatcom County often underestimate:
- Repainting cycles. Site-painted or field-finished siding typically needs repainting well before a factory-finished product does, and each repaint is a real expense.
- Caulk and seam maintenance. Materials with more seams, or wood-based products sensitive to end-grain moisture, need more frequent caulk inspection and touch-up to keep water out.
- Moss and mildew cleaning. Our extended damp season keeps moss and mildew pressure high on north-facing and shaded walls. Some surfaces shed this better than others.
- Storm and impact damage. Driving rain and coastal wind test seams and fastening details that a calmer climate wouldn't stress the same way.
When you add up install cost plus maintenance cost over fifteen or twenty years, the gap between materials often narrows, or reverses, from what the initial bids suggest.
Why We Standardized on One Product
We install James Hardie fiber cement siding exclusively, and cost is a big part of that decision. Hardie's HZ5 product line is engineered specifically for climates with heavy moisture exposure, its ColorPlus finish is baked on at the factory rather than applied on site, and it carries a strong transferable warranty. It isn't the cheapest material to install, but when you factor in reduced repainting, better moisture performance, and non-combustible construction, it's the product we're comfortable standing behind on homes that have to hold up to salt air and rain year after year. We'd rather give you a straight answer about total cost than a low number that turns into a higher one down the road.
If you'd like a clear, no-pressure breakdown of what your specific home would cost to reside, we're happy to walk your property, look at what's actually going on with your current siding, and put together a written estimate at no charge.