Cost and What Drives It
Vinyl is the lower cost option, both for the material and for the labor. It is light, it goes up fast, and one crew can move quickly on a standard house.
Fiber cement costs more per square foot and more to install, because the boards are heavy, they need to be cut with specific tools and they usually get painted. Expect a meaningful difference on a full house.
What narrows the gap is time. Vinyl typically runs several decades in this climate before it looks tired. Fiber cement runs longer and keeps its paint far longer than wood does. If you are selling in five years, the cheaper option is genuinely the smarter one. If this is the house you retire in, the math changes.
How Each One Handles Connecticut Weather
Vinyl handles freeze and thaw well because it expands and contracts freely, which is exactly why it must be hung loose rather than nailed tight. Installed too tight, it buckles in July and cracks in January. Older vinyl also gets brittle with age and can crack on impact during a cold snap.
Fiber cement is dimensionally stable, does not warp and takes wind better, which matters on exposed shoreline properties in Fairfield, Milford and Bridgeport. It does absorb moisture at cut edges if those edges are not sealed, so installation detail matters more with this material.
Salt air is hard on everything, which is why fastener choice near the water is not a small decision.
Maintenance and Appearance
Vinyl asks for a wash once a year and nothing else. It never needs painting, and the color goes through the panel so scratches do not show a different shade underneath. The trade off is that you cannot change the color later without replacing it, and up close it reads as vinyl.
Fiber cement takes paint extremely well and holds it far longer than wood siding does. You can repaint it in fifteen years and have a different looking house. It also carries a deeper profile and a shadow line that looks much closer to painted clapboard.
In neighborhoods where the houses around you are wood, that difference is noticeable from the street. If the sheathing behind the panels is compromised, wood repair and carpentry gets done before any siding goes back up.
Which One Wins in Which Situation
Choose vinyl if the budget is the binding constraint, if you are planning to sell within several years, or if the house is a rental where low maintenance beats appearance. It is the sensible default for a large share of Connecticut homes and there is nothing wrong with it.
Choose fiber cement if you are staying long term, if the house is a colonial or a historic style where the profile matters, or if you are on an exposed shoreline lot where wind resistance earns its keep.
Also consider what is behind the siding. If the sheathing is rotted or there is no house wrap, that work happens either way and belongs in the estimate before you choose a material. Siding replacement includes the layer that actually keeps water out.