We get asked a version of this question almost every week during estimates: does it matter what my siding is made of? Yes, quite a bit actually. Homes around Turlock and Modesto are a real mix. You've got older wood-sided houses near downtown, a ton of vinyl from the 90s and 2000s subdivisions, and newer builds going up with fiber cement (Hardie board is the big brand people know). Each one behaves differently under a brush, and knowing the difference saves you money and headaches down the road.
Wood Siding
Wood is the most forgiving to paint but the most demanding to prep. It moves with humidity and heat, so caulk joints and nail holes need real attention before anything goes on. If the old paint is failing (chalking, peeling, alligatoring) you're looking at scraping and sanding, not just a quick wash.
- Bare or exposed wood needs an oil-based or stain-blocking primer, especially on knots and old tannin stains.
- South and west facing walls take the brunt of our summer sun and fade or chalk faster.
- A 100% acrylic exterior paint with good flexibility handles our temperature swings better than cheaper blends.
- Expect to repaint wood every 5 to 8 years out here depending on sun exposure.
Vinyl Siding
Vinyl has its own rules and people get burned by ignoring them. Vinyl expands and contracts a lot more than wood or fiber cement, especially in the heat we get from June through September. Paint it with the wrong product and it can warp or the paint can pop off in sheets.
- You need a paint formulated for vinyl, most major brands sell a dedicated vinyl safe line now.
- Never go darker than the original color's light reflectance value (LRV), usually manufacturers publish a chart. Too dark and the vinyl absorbs heat and warps.
- Chalky, faded vinyl still needs a wash and sometimes a bonding primer, don't assume paint alone will stick to old oxidized vinyl.
- Vinyl is honestly the trickiest of the three to get a truly long lasting finish on, we're upfront with clients about that.
Fiber Cement (Hardie Board)
This is the easiest of the three in a lot of ways. Fiber cement is dimensionally stable, meaning it doesn't expand and contract like wood or vinyl, so paint adheres well and lasts a long time when it's done right.
- If it's pre-primed from the factory, you can usually go straight to a quality acrylic topcoat.
- Cut edges and field cuts from installation need to be primed before painting or moisture gets in.
- Caulking at butt joints and trim is critical, fiber cement relies on sealant more than wood does to stay watertight.
- Expect 10 plus years out of a good paint job on fiber cement in our climate, longer than wood or vinyl typically.
What This Means for Your Estimate
When we come out to bid a job, siding type changes both labor and material cost. Wood often means more prep hours (scraping, sanding, priming bare spots). Vinyl means we're checking color charts and using specific paint lines, which can cost a bit more per gallon. Fiber cement is usually the most straightforward if it was installed and primed correctly to begin with.
If your house is a mix, which happens a lot with additions or remodels, say a fiber cement addition on an older wood house, we treat each material separately during prep even though the topcoat color matches across the whole exterior.
One More Thing Worth Knowing
If you're not sure what your siding is, a contractor should be able to identify it in about ten seconds on the walkthrough. If someone quotes your exterior without asking or checking siding type, that's a red flag they're not actually accounting for the differences in prep and product. It affects the price and it affects how long the job holds up, so it's worth asking about directly if it's not addressed on your own.