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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