Siding Glossary — Siding Quotes Near Me

A

Actual Cash Value (ACV): How some insurance policies pay out for older siding: replacement cost minus depreciation for wear and tear. An ACV settlement on 20-year-old siding can be a fraction of what replacement actually costs, which is why many homeowners pay extra for RCV (Replacement Cost Value) coverage instead.
Adjuster: The insurance company representative who inspects your siding after a storm and decides what the policy will pay. Their written estimate sets the claim amount. You can request a re-inspection if you believe damage was missed, and in many states you can hire a public adjuster to represent you.

B

Backer board: A rigid insulating panel installed behind some siding profiles to add R-value, flatten the wall, and improve impact resistance. Common with insulated vinyl siding. Adds modest cost but can reduce drafts and help panels lie straighter against an uneven wall.
Blind nailing: Fastening siding through a concealed nailing hem so the fastener heads are hidden by the course above. Standard for lap siding because it leaves no exposed nails to rust or telegraph through the finish. Nails should be driven snug but not tight, letting panels move with temperature.
Butt joint: Where the ends of two siding boards or panels meet in the same course. On lap siding these joints are staggered course to course and flashed or sealed so water cannot get behind the wall. Sloppy butt joints are one of the most common siding leak points.

C

Certificate of insurance (COI): The document a contractor's insurer issues showing they carry current general liability and workers' compensation coverage. Always request a current COI before work starts — an expired one protects nobody. You can call the issuing insurer to verify it's still active.
Chalking: A powdery white residue that develops on the surface of older painted or vinyl siding as the finish breaks down under UV exposure. Light chalking is normal aging and can sometimes be washed off; heavy chalking signals the finish is failing and the siding is nearing the end of its appearance life.
Change order: A written agreement modifying the scope or price of the original contract. If your installer finds rotted sheathing they didn't plan for, the extra work and cost should be documented in a change order you sign before it's done — not added to the final invoice by surprise.
Corner post: A pre-formed trim piece that covers the outside (and sometimes inside) corners of a house, receiving the cut ends of siding panels from both walls. Corner posts give a finished look and keep water out of the corner joint. Available in matching colors for vinyl and other panel systems.
Course: A single horizontal row of siding running across the wall. Each course overlaps or interlocks with the one below it to shed water downward. Courses are kept level with the help of chalk lines and a starter strip so the whole wall reads straight from the street.
Cupping: When the edges of a wood or fiber-cement board curl away from the wall, leaving the board concave. Usually a sign of moisture imbalance — water absorbed on one face — or end-of-life on older wood siding. Widespread cupping means the siding no longer lies flat and is past spot repair.

D

Drainable house wrap: A weather-resistive barrier with a textured or grooved surface that creates a small gap behind the siding, letting any water that gets past the panels drain down and out. Recommended behind absorptive claddings like fiber cement and especially behind stucco and manufactured stone.

E

Engineered wood siding: Siding made from wood strands or fibers bonded with resin and treated for moisture and termite resistance — LP SmartSide is the best-known brand. Offers a real-wood look at a lower cost than cedar, with lifespans of 30+ years. Lighter and easier to install than fiber cement.
Exposure: The visible height of a siding course after installation, with the rest covered by the course above. Typical lap-siding exposure runs about 4 to 7 inches depending on the profile. Exposure sets the overlap that keeps water out — stretching it past spec saves material but weakens weather protection.

F

Fascia: The horizontal trim board running along the roof edge where the gutters attach, just above the siding. Exposed to weather and prone to rot if water gets behind it. Fascia is often wrapped in aluminum or replaced during a siding job — ask whether it's included in your quote or priced separately.
Fiber-cement siding: Siding made from cement, sand, and cellulose fibers — James Hardie is the category leader. Extremely durable, fire-resistant, and rot- and pest-proof, with a 30–50 year lifespan. Heavier and more labor-intensive to install than vinyl, which is reflected in the higher installed price.
Furring strips: Thin strips of wood or composite fastened vertically over the sheathing to create an air gap behind the siding — the basis of a rainscreen. Furring lets the wall drain and dry, which meaningfully extends the life of wood and fiber-cement cladding in wet climates.

G

Gable: The triangular wall section at the end of a pitched roof. Gable walls are fully visible and often sided with a contrasting profile — such as shake panels above lap siding — for visual interest. The angled top edges require careful cutting and J-channel to finish cleanly.

H

House wrap: The weather-resistive barrier — a synthetic sheet such as Tyvek — installed over the wall sheathing and behind the siding. It blocks bulk water and wind while letting water vapor escape so the wall can dry. Required by code on most exterior walls and a critical second line of defense.

I

Impact-resistant siding: Siding engineered to resist cracking and puncture from hail and wind-borne debris — typically thicker vinyl, insulated vinyl, or fiber cement tested to standards like ASTM D4226. Some insurers offer premium discounts for impact-rated siding in hail-prone states, often offsetting the cost difference.
Insulated vinyl siding: Vinyl siding with rigid foam permanently fused to the back of each panel. The foam adds R-value, dampens noise, improves impact resistance, and helps panels lie flatter against an uneven wall. Costs more than standard vinyl but can trim heating and cooling bills.
International Residential Code (IRC): The model building code adopted, with state amendments, across most US jurisdictions. Chapter 7 governs wall covering: water-resistive barriers, flashing, fastening, and clearances for each siding material. Your local building inspector enforces the IRC version your jurisdiction has adopted, which can lag the current edition by several years.

J

J-channel: A J-shaped trim piece that receives the cut edges of siding panels around windows, doors, soffits, and rooflines. It hides raw panel ends and channels water away from openings. Properly flashed and lapped J-channel is essential — poorly installed J-channel funnels water into the wall.

L

Lap siding: Horizontal siding installed in overlapping courses, each board lapping the one below to shed water. The most common residential profile, available in vinyl, fiber cement, engineered wood, and traditional wood. Also called clapboard or bevel siding depending on the board shape.
Lien waiver: A document your contractor — and any subs or material suppliers they used — signs acknowledging they've been paid. Collecting signed lien waivers before final payment protects you from mechanic's liens if a sub isn't paid by the GC. Standard practice on any job over a few thousand dollars.

M

Metal siding: Siding made from steel or aluminum, available in lap, panel, and standing-seam profiles. Steel resists dents and impact well; aluminum is lighter and immune to rust. Lifespans of 40+ years, low maintenance, and noncombustible — a strong choice in wildfire- and hail-prone regions.
Moss: Green plant growth that takes hold on shaded, north-facing siding in humid climates, holding moisture against the wall. Most common on wood and fiber-cement cladding. Treat early with a gentle cleaning solution — avoid high-pressure washing, which forces water behind panels and damages finishes.
Mounting block: A pre-formed flat block that mounts on top of the siding to give a level, sealed surface for fixtures like light fixtures, outlets, hose bibs, and dryer vents. Mounting blocks keep penetrations watertight and avoid cutting fixtures awkwardly into a contoured panel.

N

Nailing hem: The slotted strip along the top edge of a vinyl or metal siding panel where fasteners are driven. The slots — not round holes — let the panel expand and contract with temperature. Nails go in the center of the slot and are left slightly loose so the panel can float.

O

Oriented strand board (OSB) sheathing: Engineered wood panels nailed to the wall studs that form the structural base for the house wrap and siding. Rotted or water-damaged sheathing must be cut out and replaced during a re-siding job — usually priced per sheet, so ask your contractor how overages are handled.
Overlay (siding-over): Installing new siding directly over the existing cladding instead of tearing it off. Sometimes done with vinyl over old wood, but it traps any hidden moisture or rot, hides sheathing damage, and can complicate flashing at windows. A full tear-off is almost always the better long-term choice.

P

Panel siding: Large-format siding installed as sheets rather than individual boards — board-and-batten and T1-11 are common examples. Faster to install over big wall areas and popular for a vertical look. Vertical joints must be flashed or battened carefully because they run with the direction of water flow.
Penetration: Anything that interrupts the siding surface: windows, doors, hose bibs, vents, electrical fixtures, and pipes. Every penetration needs flashing or a sealed mounting block and is a potential leak point, which is why walls with many openings cost more to side per square than simple ones.
Policy deductible: The amount you pay out-of-pocket before insurance pays on a siding claim. Common deductibles are a flat $1,000–$2,500 or 1–2% of your dwelling coverage limit. On a $15,000 claim with a $3,000 deductible, insurance pays $12,000 and you pay the rest.
Pro-rated warranty: A manufacturer warranty that pays less as the siding ages. A "lifetime" pro-rated warranty might cover 100% of materials for the first 5–10 years, then drop in steps over time. Read the fine print — long warranty numbers rarely translate to equivalent dollar value.

R

Rainscreen: A siding assembly with a deliberate air gap — created by furring strips or a drainage mat — between the cladding and the house wrap. The gap lets any water that gets past the siding drain out and lets the wall dry. Rainscreens dramatically extend siding life in wet climates.
Replacement Cost Value (RCV): How insurance pays on a policy with full replacement coverage: the actual cost to replace the damaged siding, without depreciation for age. Typically paid in two installments — one at approval and a second after the completed work is verified. Worth the extra premium on older siding.
Rotted sheathing: Plywood or OSB wall sheathing that has absorbed enough moisture (usually from prior leaks or failed flashing) to become soft or structurally compromised. Must be cut out and replaced during a siding job. Usually priced per sheet — ask your contractor to show you any sheets they plan to charge for.

S

Scope of work: The detailed list of exactly what the contractor will do — tear off, replace house wrap, install siding, flash openings, install trim, haul debris — spelled out in the contract. A vague scope ("replace the siding") invites change-order surprises. A detailed one protects both sides.
Soffit: The underside of the roof overhang at the eaves, often with vents built in. Most modern soffits are vinyl or aluminum panels, which resist rot better than the painted-wood soffits common on older homes. Soffit is frequently replaced alongside siding for a uniform finished look.
Starter strip: A continuous strip fastened along the bottom of the wall that the first course of siding locks into. It sets the angle and projection of the whole wall and anchors the bottom edge against wind uplift. A level, properly placed starter strip is what keeps every course above it straight.
Stucco: A cement-based cladding applied wet in coats over lath and a weather-resistive barrier, then hardening into a seamless surface. Long-lasting and fire-resistant, common in the Southwest. Cracks can develop with settling, and proper drainage behind the system is essential to avoid trapped moisture.

T

Thermal expansion: The movement of siding panels as they heat and cool — vinyl in particular can expand and contract noticeably across a day. Installers account for it by leaving gaps at panel ends, nailing loosely in slotted hems, and not face-nailing. Ignoring it causes buckling, waviness, and cracked panels.
Three-coat stucco: Traditional stucco applied in three layers — scratch coat, brown coat, and finish coat — over metal lath. More durable and crack-resistant than newer one-coat systems but more labor-intensive and costly. Still the standard for quality stucco work in many Western markets.
Transferable warranty: A manufacturer warranty that stays valid when the home is sold, usually with a one-time transfer fee and written registration. A transferable warranty can add real resale value to newer siding. Non-transferable warranties simply end at sale, which is worth knowing before choosing a brand.
Trim: The finishing pieces — corner posts, J-channel, frieze board, window and door surrounds — that cover panel edges and give a siding job its clean lines. Quality trim work separates a professional installation from an amateur one, and trim is often quoted as its own line item.

V

Vinyl siding: Siding made from PVC plastic — the most common and lowest-cost cladding on US homes. Low maintenance, never needs painting, and available in many colors and profiles. Typical lifespan 20–40 years. Can crack in extreme cold or warp near intense heat sources, but performs well in most climates.

W

Wall sheathing: The plywood, OSB, or rigid panels fastened to the wall studs that form the structural base of the wall. Everything else — house wrap, flashing, siding, trim — attaches to the sheathing. Rotted sheathing must be cut out and replaced during any siding replacement.
Weather-resistive barrier (WRB): The code term for the water- and air-resistant layer behind the siding — house wrap, building felt, or a fluid-applied membrane. The WRB sheds bulk water that gets past the cladding while letting the wall dry to the outside. Proper WRB lapping over flashing is what keeps walls dry.
Weep holes: Small openings at the bottom edge of vinyl panels and at flashing locations that let water that has gotten behind the siding drain back out. Weep holes must be kept clear — painting over them or caulking them shut traps moisture against the wall and causes hidden rot.
Wind rating: The maximum wind speed a siding product is rated to resist before panels loosen or blow off. Vinyl siding is commonly rated from 110 to 200+ mph depending on profile and thickness. The minimum required varies by region — coastal and hurricane-exposed counties typically require higher-rated siding by code.
Wind uplift: The force wind applies by getting under siding panels and lifting them away from the wall, breaking the lock and peeling them off. Concentrated at corners, edges, and gable ends — which is why a secure starter strip and proper fastening matter most in those spots.
Wood siding: Natural wood cladding — typically cedar lap boards or shakes — prized for its appearance and traditional character. Lasts 30+ years with regular paint or stain maintenance. More expensive and higher-maintenance than vinyl or fiber cement, and vulnerable to rot and insects if neglected.
Workmanship warranty: The siding contractor's warranty on their own installation — separate from the manufacturer's warranty on the materials. Typical range is 2 to 25 years. A 10-year workmanship warranty from an established local installer is often worth more than a 25-year one from a company that may not be around that long.