Vinyl Siding for Northern Illinois Homes

Standard vinyl siding versus insulated vinyl

Standard vinyl is a hollow-backed panel hung over house wrap or a thin foam underlayment. Insulated vinyl adds expanded polystyrene foam contoured to the back of each panel and attached to it. Insulated siding has its own ASTM product standard, D7793.

The foam does three things. It stiffens the panel, so walls look flatter and resist dents better. It adds a modest R-value, usually in the low single digits, and because the foam is continuous it covers the studs that cavity insulation can’t. It may also slightly dampen outside noise. What it won’t do is stand in for proper wall insulation or stop air leaks; that work happens at the sheathing and inside the walls. Insulated panels cost more and need deeper receiving channels around windows and doors.

Vinyl siding thickness: what 0.040 to 0.055 inch buys you

Vinyl siding thickness is measured in thousandths of an inch. The product standard, ASTM D3679, sets a minimum of 0.035 inch. Economy panels sit just above that, around 0.040; mid-grade lines run in the low to mid 0.04s; premium panels reach roughly 0.046 to 0.055. Thicker panels resist wind, impact and waviness better and usually come with deeper profiles that cast stronger shadow lines.

Thickness isn’t the whole picture. Profile design, the nailing hem and the locking edge matter as much. Still, ask every bidder to name the exact product and its thickness so you compare like with like. The Vinyl Siding Institute runs a certification program listing products independently verified to meet the standard, including color-retention claims for certified colors.

Why vinyl siding cracks in cold weather

Vinyl is PVC, and PVC loses toughness as it gets cold. A panel that flexes under a thrown ball in July can crack from the same hit in January. That shows up as split panels along the snowblower’s throw path, beside driveways where ice chunks fly off car tires, and after spring hail that arrives before the walls have warmed.

Cold affects installation too. Panels cut and nailed below freezing are more likely to crack at the cut or the nail slot, so careful crews slow down, use fine-tooth blades or snips, and keep cartons somewhere warmer until they hang them. If a winter installation is unavoidable, ask how the crew adjusts.

Thermal movement: why vinyl must hang loose

Vinyl grows and shrinks with temperature more than any other siding, enough to see on a full-length panel between a January night and a sunny July afternoon. Good installation lets it slide. Nails go in the center of the slotted hem and stop short of tight, leaving about the thickness of a dime under the head. Panel ends stop short of corner posts and window trim, with a larger gap when the work happens in cold weather. Overlaps face away from the main street view so the laps are less visible.

When those rules are broken, the siding tells you. Panels that ripple on hot afternoons, unlock at the laps, or crack at nail holes were usually fastened too tightly. Rehanging those runs often costs less than residing the wall. Our siding services cover both repairs and full replacement.

Hail damage, color matching and your insurer

After a hailstorm, vinyl damage is easy to spot: cracks, punctures and chips, usually on the walls that faced the storm. The harder problem is matching. Replacement panels from the same line can look different after years of fading, and many colors are eventually discontinued. Whether a policy pays to reside undamaged walls so everything matches depends on its language and the adjuster’s findings; that decision is your insurer’s. Photograph damage the day after a storm and keep any spare panels from the original job. If a full replacement is on the table, read our siding comparison and see how fiber cement siding holds up to hail.

How it handles Chicago-area weather

Care and maintenance

Rinse the walls once a year from the top down with a garden hose and a soft brush; a mild soap solution handles most dirt and mildew. If you use a pressure washer, keep the spray level or angled down so it can’t drive water up behind the laps. Keep grills well away from the walls, and watch any wall that faces a neighbor’s low-E windows for signs of warping. When a panel cracks, replace it promptly, because an open crack lets water reach the house wrap and sheathing.

Vinyl Siding: common questions

Is insulated vinyl siding worth the extra cost?

It is when the walls are under-insulated or you want flatter, stiffer walls that resist dents. On a newer, well-insulated home the energy gain is small, and the main benefits are appearance and impact resistance.

Can vinyl siding be installed in winter?

Yes, with care. Panels are more brittle in the cold, cuts need to be clean, and end gaps must be wider so the siding has room to grow next summer. Ask the crew how they adjust for a cold-weather job.

Why does my vinyl siding look wavy?

Usually because it was nailed too tightly, gapped too little at the ends, or hung over an uneven wall. Reflected sunlight can also distort it. Rehanging fixes the first causes; heat-warped panels need replacing.

Can vinyl siding be painted?

It can, with paints formulated for vinyl and in colors no darker than the siding maker allows, because darker colors absorb more heat and can warp the panels. Painting may affect the siding warranty, so read the terms first.