Glossary

Manufactured home glossary

Plain-English definitions for the terms you'll run into when buying, owning and insuring a manufactured or mobile home.

1994 wind standards
Standards & documents

HUD tightened wind design rules for homes built from July 1994, adding the three wind zones. Homes built before that are treated as higher wind risk by many carriers.

360Value
Valuation & rating

Verisk’s replacement-cost estimating tool. Inputs such as square footage, year, manufacturer and construction produce an estimated rebuild cost that carriers use to set the dwelling limit.

Actual Cash Value (ACV)
Valuation & rating

A settlement basis that pays replacement cost minus depreciation, so an older home pays out much less than the cost of a new one.

Additional insured
Coverage & policy

A party other than the named insured who is covered by the policy or protected under it, such as a co-owner or a lender with an interest in the home.

Aluminum branch wiring
Valuation & rating

Aluminum household wiring, used in some homes from the mid-1960s to mid-1970s. It loosens at connections and is a fire risk, so some carriers require rewiring or approved repairs.

Axle
Construction

The wheel-bearing shaft on the chassis used to move the home. Axles and wheels are commonly removed at installation.

Binder
Coverage & policy

A temporary contract that proves coverage is in force until the full policy is issued, commonly for up to 90 days.

Chassis
Construction

The steel frame under a manufactured home that carries the structure and its axles for transport. Two long I-beams run the length of the home.

CLUE report
Valuation & rating

A report of claims made on a home or by an applicant over roughly the last seven years. Carriers use it to price and to check what was disclosed.

Coinsurance
Coverage & policy

A clause requiring coverage of at least a set share (often 80%) of the home’s value. Falling short means the insured bears part of every loss, even a partial one.

Cosmetic damage exclusion
Coverage & policy

A wind/hail exclusion for damage that changes appearance (dents, pitting) but does not stop the roof or siding from working.

DAPIA / IPIA
Standards & documents

HUD-approved agencies. The DAPIA approves a manufacturer’s home designs and installation instructions; the IPIA inspects production in the factory.

Data plate
Standards & documents

A paper compliance certificate inside the home, usually in a kitchen cabinet, closet or electrical panel area. It lists the manufacturer, model, serial number, build date and the wind, roof-load and thermal ratings.

Declarations page
Coverage & policy

The summary page of a policy showing the named insured, address, limits, deductibles, forms and premium.

Deductible
Coverage & policy

The amount the insured pays out of pocket on a claim before insurance pays. It can be a flat dollar amount or a percentage of the dwelling limit.

Depreciation
Valuation & rating

The loss of value due to age, wear and obsolescence, which is subtracted from an ACV settlement.

Distance to fire station
Valuation & rating

The road distance from the home to the nearest responding fire station, used together with protection class.

Double-wide
Home types

A manufactured home built in two sections that are joined at the site along a marriage line, typically 20 to 36 feet wide overall. It is the most common size.

Dwelling coverage (Coverage A)
Coverage & policy

Pays to repair or replace the home itself, along with attached structures such as porches and decks.

Effective date
Coverage & policy

The date the coverage starts. Carriers limit how far ahead of today it may be set.

Endorsement
Coverage & policy

A written change that adds, removes or modifies coverage on a policy, such as water backup or extended replacement cost.

Extended replacement cost
Coverage & policy

An endorsement that pays a set percentage above the dwelling limit (often 10–50%) when rebuilding costs exceed it after a large loss.

Federal Pacific panel
Valuation & rating

An older brand of electrical panel (Stab-Lok breakers) with a known record of failing to trip. Many carriers decline homes that still have one or require replacement.

Fireline
Valuation & rating

A wildfire risk score for a location, based on vegetation, slope and access. Used to price or decline homes in wildfire-prone areas.

Foundation certification
Standards & documents

An engineer’s letter confirming the foundation and anchoring meet manufacturer or HUD design for the site’s wind and seismic loads. Lenders and carriers may ask for it.

Golf cart coverage
Coverage & policy

An endorsement adding physical damage and liability coverage for a golf cart kept at the property. Carriers commonly ask how many carts there are and whether they are driven on public streets.

HO-7
Coverage & policy

A homeowners policy form designed for manufactured homes. Sometimes called MH-3 or a mobile home form, it is the manufactured-housing counterpart to the HO-3.

HUD Code
Standards & documents

The Federal Manufactured Home Construction and Safety Standards, in force since June 15, 1976. It sets requirements for design, strength, fire safety, plumbing, heating, electrical and energy performance.

HUD label
Standards & documents

A metal tag (the red label) permanently riveted on the exterior of each transportable section, certifying construction to the HUD Code. Each section carries its own unique number.

Installer
Construction

The licensed contractor who sets the home, blocks it, anchors it and connects utilities. Many states license installers and inspect the setup.

Insulation
Construction

Material in the floor, walls and roof that slows heat transfer. Fiberglass is the usual choice, and the HUD thermal zone sets the minimum.

Insurable interest
Coverage & policy

A financial stake in the home: the owner would lose money if it were damaged. Without it a policy cannot be issued or paid on.

Insurance score
Valuation & rating

A number built from credit-based information that carriers use to predict claim likelihood. It is not the same as a lending credit score, and some states restrict its use.

Insured value
Valuation & rating

The dwelling limit requested or calculated for Coverage A. A limit set too low can mean underinsurance at claim time, and most carriers also cap how far the limit can run above or below their valuation estimate before requiring it to be adjusted.

Land-lease community
Site & ownership

A community where residents own their homes but rent the lot. This includes 55+ and all-age communities.

Loss history
Coverage & policy

The record of prior claims on the home or the applicant.

Loss of use (Coverage D)
Coverage & policy

Pays extra living costs, such as a hotel and meals, while the home is uninhabitable after a covered loss.

Lot rent
Site & ownership

The monthly fee for the land space a home occupies in a community, often covering shared services.

Manufactured home
Home types

A home built entirely in a factory on a permanent steel chassis to the federal HUD Code, then hauled to its site. Only homes built on or after June 15, 1976 can legally be called manufactured.

Manufactured home loan
Site & ownership

Financing for a manufactured home. If the home is titled as personal property, it is usually a chattel loan with a higher rate and shorter term. If it is affixed to owned land, it can be a conventional mortgage.

Marriage line
Home types

The seam where two sections of a multi-section home are bolted together. It is sealed and finished inside and out.

Medical payments (Coverage F)
Coverage & policy

Pays small medical bills for guests hurt on the property regardless of fault.

Mobile home
Home types

The pre-1976 name for a factory-built home. It is still used casually for any manufactured home, but strictly it means a unit built before the HUD Code took effect.

Model Installation Standards
Standards & documents

HUD’s federal rules (24 CFR Part 3285) for setting up a manufactured home: foundation, anchoring, blocking and connections. They apply where a state has no program of its own.

Modular home
Home types

A home built in factory sections but held to the same local or state building code as a site-built house. It is set on a permanent foundation and is treated as real estate.

Moisture barrier
Construction

A sheet of plastic (a vapor retarder) laid over the ground under the home to keep soil moisture from rising into the floor system.

Mold and remediation coverage
Coverage & policy

Coverage for mold cleanup and repair. It is usually capped at a small flat sublimit, often just a few thousand dollars, far below the dwelling limit.

Mortgagee
Site & ownership

The lender with a financial interest in the home. It is listed on the policy so it is paid alongside the owner on a covered loss.

Mover
Construction

A company that transports a home between sites, often with pilot vehicles because of its width. Moving an older home can void or change its coverage.

Named insured
Coverage & policy

The person or people the policy is issued to, as listed on the declarations page. Anyone else with an interest, such as a lender, is an additional insured or loss payee.

Named perils
Coverage & policy

A policy that covers only the causes of loss it lists, such as fire, wind, hail and theft. Anything not listed is excluded.

Occupancy
Valuation & rating

How the home is used: owner-occupied primary residence, seasonal or secondary, or rented out. It changes eligibility, forms and rates.

On-frame / off-frame
Construction

On-frame homes stay on their steel chassis after installation. Off-frame homes are lifted off the chassis and placed onto a permanent foundation.

Open perils
Coverage & policy

Sometimes called all-risk. Every cause of loss is covered unless the policy specifically excludes it.

Ordinance or law
Coverage & policy

Coverage for the added cost of rebuilding to current building codes after a loss.

Other structures (Coverage B)
Coverage & policy

Covers detached structures on the property, such as sheds, carports, fences and detached garages. It is usually a percentage of the dwelling limit.

Outrigger
Construction

A beam extending sideways from the chassis to support the floor edge and help spread the home’s weight.

Panelized home
Home types

A home whose wall, floor and roof panels are built in a factory and shipped flat to be assembled on site. Local building codes apply.

Park model
Home types

A small (roughly 400 sq ft or less) park-style unit built to an RV industry standard rather than the HUD Code. It is intended for seasonal or recreational stays.

Permanent foundation
Construction

A foundation engineered to carry the home and anchor it to the ground, such as a poured slab, a crawlspace or a full basement, built to the manufacturer’s or a local engineer’s specification.

Personal liability (Coverage E)
Coverage & policy

Covers legal costs and damages if the insured is held responsible for injuring someone or damaging their property. Some carriers call this Premises Liability when the home is not owner-occupied.

Personal property (chattel)
Site & ownership

A home treated as movable property, usually when it sits on rented land or has not been affixed to a foundation. Chattel loans are typically shorter and higher-rate than mortgages.

Personal property (Coverage C)
Coverage & policy

Covers belongings inside the home, such as furniture, appliances and clothing.

Piers
Construction

Support columns (block, concrete or steel) placed under the chassis to carry the home’s weight above the ground.

Policy term
Coverage & policy

How long the policy runs before renewal, commonly 12 months.

Polybutylene plumbing
Valuation & rating

A plastic supply pipe installed from roughly 1978 to 1995 that is prone to bursting. Many carriers exclude water damage from it or decline the home.

Pre-fab home
Home types

Umbrella term for any home whose parts are built off-site and assembled on the lot. Manufactured, modular and panelized homes are all prefab, but only manufactured homes follow the HUD Code.

Premium
Coverage & policy

The price of the policy for its term, which can be paid up front or in installments.

Prior carrier / lapse in coverage
Coverage & policy

The insurer the applicant had before, and any gap between the old policy’s end and the new one’s start. Gaps can raise the premium or block a quote.

Property tax (manufactured home)
Site & ownership

A home titled as personal property may be taxed like a vehicle rather than land. In a land-lease community, the park often pays the land tax and passes it through in lot rent.

Protection Class (PPC)
Valuation & rating

A 1-to-10 grade for how well a community can fight fires, based on the fire department, water supply and alarm system. Lower numbers are better and cheaper.

Quadruple-wide
Home types

The largest common size class: four sections joined on site, usually custom-ordered with open floor plans. Not every manufacturer builds them.

Real property
Site & ownership

A home permanently attached to land the owner also owns, recorded with the county like a site-built house.

Replacement cost (RC)
Valuation & rating

A settlement basis that pays what it costs to rebuild or replace with similar new materials, with no deduction for age or wear.

Restrictive covenant
Site & ownership

A recorded rule limiting what an owner may do with a property, such as banning older homes or setting minimum sizes.

Roof age
Valuation & rating

How many years since the roof surface was installed or replaced. Older roofs raise wind/hail rates and can trigger a payment schedule or eligibility limit.

Roof load zone
Standards & documents

HUD’s rating for how much snow and other weight the roof must carry: South (20 psf), Middle (30 psf) or North (40 psf).

Roof surfacing payment schedule
Coverage & policy

An endorsement that pays wind and hail roof claims as a percentage that shrinks with roof age, instead of full replacement cost.

Roof type
Construction

The style and material of the roof. Common choices are shingle, metal, and membrane over a low-slope roof, and pitched versus flat framing.

Scheduled personal property
Coverage & policy

Optional coverage that insures a named high-value item, such as jewelry, firearms, fine art, musical instruments or collectible coins, at its own listed value instead of relying on the base personal property sublimit.

Serial number
Standards & documents

The manufacturer’s unique identifier for the home. Multi-section homes carry one number with a letter suffix per section.

Setbacks
Site & ownership

The minimum distances a structure must keep from property lines and other buildings.

Sidewall entry / end wall entry
Construction

Describes which wall the front door is on: the long side (sidewall) or the short end (end wall).

Siding
Construction

The exterior wall covering, such as vinyl, hardboard, metal or fiber cement. It affects appearance, durability and, in some regions, fire and hail rating.

Single-wide
Home types

A manufactured home delivered as one section, typically 14 to 18 feet wide and up to about 80 feet long.

SIPs
Construction

Structural insulated panels: a foam core bonded between two structural boards, used for walls, roofs and floors. They are strong and energy-efficient, and mainly appear in modular, panelized and site-built homes.

Site prep
Site & ownership

Work to make the lot ready for a home: grading, drainage, utilities and the foundation.

Site-built home
Home types

A house constructed piece by piece on its lot, also called stick-built. It follows local building codes and has no chassis.

Skirting
Construction

Panels enclosing the gap between the home’s floor and the ground. They keep out animals, weather and debris and help protect the plumbing and insulation underneath.

Slab
Construction

A single poured concrete pad that a home is set on.

Specific building exclusion
Coverage & policy

An endorsement that removes coverage for one named outbuilding, such as a shed, barn or carport, often used to keep an otherwise-eligible home insurable when that one structure is in poor condition.

Subrogation
Coverage & policy

The insurer’s right to recover what it paid on a claim from whoever caused the loss.

Tag-along
Home types

A small add-on section, such as an extra room, entry or porch, hauled separately and attached at the site.

Thermal zone
Standards & documents

HUD’s climate rating (Zones 1 to 3) for the insulation and heating/cooling the home was built with.

Tie-downs
Construction

Ground anchors joined to the chassis by steel straps. They stop wind from sliding, tipping or lifting the home.

Title (certificate of title)
Standards & documents

The ownership record for a home. Depending on state and foundation, a home is titled like a vehicle or converted to real property.

Tongue
Construction

The hitch assembly at the front of the chassis that a tow vehicle connects to. It is normally removed or hidden once the home is set.

Trim-out
Construction

The final finishing stage of installation: moldings, baseboards, connecting the marriage line and other detail work before move-in.

Trip collision coverage
Coverage & policy

Optional coverage for damage to a manufactured home while it is being physically moved or transported, separate from the coverage that applies once it is set up at its site.

Triple-wide
Home types

A manufactured home made of three sections joined on site, typically 30 feet wide or more, which allows floor plans that smaller homes cannot fit.

Truss system
Construction

Prefabricated triangulated frames that support the roof. Their spacing and pitch contribute to the roof-load rating.

Undercarriage
Construction

Everything beneath the floor: chassis, axles, plumbing, ducts and insulation, normally enclosed by a belly wrap.

Underinsurance
Valuation & rating

Carrying a dwelling limit lower than the true cost to rebuild, which leaves the owner covering the gap after a loss.

Underwriting
Coverage & policy

The carrier’s review of a risk to decide whether to accept it and on what terms.

Update (plumbing, electrical, heating, roof)
Valuation & rating

Records of major system replacements. Newer systems reduce fire and water loss risk and can lower premiums.

Vacancy clause
Coverage & policy

A policy provision that limits or removes coverage for certain perils once the home has sat empty for a set period, commonly 30 or 60 days.

Water backup
Coverage & policy

Optional coverage for damage from sewers or drains backing up, or a sump pump failing. It is generally excluded from base policies.

Water damage coverage
Coverage & policy

Coverage for damage from leaks and other water sources within the home, separate from wind/hail. It is often set as its own percentage of the dwelling limit and carries its own deductible, distinct from the deductible on the rest of the policy.

Wind zone
Standards & documents

HUD’s rating of the wind load a home was designed for. Zone I is designed for 70 mph, Zone II for 100 mph and Zone III for 110 mph, the strongest coastal rating.

Wind/hail deductible
Coverage & policy

A separate, usually percentage-based deductible (commonly 1%, 2% or 5% of Coverage A) applied only to wind and hail losses.

Year built
Valuation & rating

The year the home was manufactured, per the data plate. It is one of the strongest rating factors and sets eligibility cutoffs.

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