---
title: "How To Ship Modular Homes"
description: "Shipping modular homes internationally? We make it easy Learn about shipping methods, paperwork, and potential issues. Get your free consultation now"
url: "https://shippinginternational.co.uk/how-to-ship/modular-homes"
date: "2026-05-30T08:28:33+00:00"
language: "en-GB"
---

![modular home](https://shippinginternational.co.uk/images/si/modular-building.webp)

 # Ship Modular Homes Internationally: The Professional Logistics Guide

  ## The Complex Reality of Modular Home Shipping

Shipping a modular home is a feat of heavy-lift engineering rather than standard freight. Unlike traditional construction, where materials arrive in parts, modular housing moves as complete volumetric units. These modules often exceed standard shipping container dimensions, classifying them as Out-of-Gauge (OOG) cargo. At Shipping International, we act as the primary link between your manufacturing facility and the final build site. We manage the transition from the factory floor to the port, through the ocean voyage, and onto the final delivery address. Our team handles the technical hurdles of [sea freight](https://shippinginternational.co.uk/services/sea-freight/) and [road freight](https://shippinginternational.co.uk/services/road-freight/), ensuring your structures arrive square, level, and ready for installation.

  ## Module Dimensions and Weight Specifications

Success starts with precise data. Every millimetre and gram matters when planning an OOG move. We require a full technical breakdown for every module before we can select the correct equipment. Standard ISO containers have strict internal height and width limits. If your module is even 10cm too wide, it cannot fit in a standard box.

### Defining Out-of-Gauge (OOG) Status

A module is OOG if it surpasses the internal dimensions of a standard 40ft High Cube container (approx. 12m length, 2.3m width, and 2.6m height). Most modular homes are built to wider and taller specifications to provide comfortable living spaces. These units require specialised equipment like flat racks or open-top containers. We also assess the weight distribution. Because modules contain heavy items like kitchens or bathrooms at one end, they often have an offset centre of gravity. We mark these balance points clearly to guide crane operators at the terminal.

### Verified Gross Mass (VGM) Requirements

Under international safety law (SOLAS), every shipment must have a **Verified Gross Mass** (VGM). This is the total weight of the module plus any lashing, timber cradles, and the container’s tare weight. Inaccurate weight data causes vessel instability and crane accidents. We manage the VGM process using certified weighbridges or precise calculations to ensure your cargo meets the standards set by the [International Maritime Organisation](https://www.imo.org/) (IMO). Failure to provide a VGM before the port cut-off will result in a "no-load" order, which can stall your entire project.

  ## Selecting the Optimal Shipping Method

The physical profile of your modules dictates the shipping mode. We select the method that balances cost, frequency, and protection.

### Flat Rack Container Solutions

Flat racks are the standard for oversized modules. These units have a flat base and two end walls but no sides or roof. They allow us to load wide and tall modules that protrude beyond the standard container "envelope." Flat racks offer a "middle-ground" between standard containers and breakbulk. They move on the same high-frequency container ships, which keeps your schedule predictable. For more on this equipment, check our [sea freight services](https://shippinginternational.co.uk/services/sea-freight/).

### Breakbulk and Heavy Lift

If your modules are exceptionally large, such as entire multi-room sections, they may require **breakbulk** shipping. We secure these modules directly to the vessel's deck or in the hold on a custom timber cradle. This method is used when the module exceeds the weight capacity of a 40ft flat rack (typically around 45 tonnes). Breakbulk requires specialised stevedoring and heavy-lift cranes at both the origin and destination ports.

### Roll-on/Roll-off (RoRo)

RoRo is an efficient choice for modular units built on wheeled chassis or those that can be safely loaded onto Mafi trailers (heavy-duty wheeled platforms). The module is towed into the weather-protected lower decks of the ship. This method reduces the need for crane lifts, which minimises the risk of structural stress on the module.

 ![modular home](https://shippinginternational.co.uk/images/si/modular-building1.webp) ## UK Road Transport and STGO Compliance

Moving a wide home module from a factory to a UK port like Felixstowe or Southampton involves navigating the **Special Types General Order** (STGO). If your load exceeds 2.9m in width or 44 tonnes in total weight, it is an abnormal indivisible load.

### STGO Categories and Notice Periods

The UK road network is protected by strict notification rules. Depending on the size of your module, we must give notice to the police and highway authorities:

- **Category 1:** Up to 50 tonnes. Requires 2 clear days' notice to highway authorities.
- **Category 2:** Up to 80 tonnes. Requires 2 clear days' notice to police and authorities.
- **Category 3:** Up to 150 tonnes. Requires 5 clear days' notice.

If the module is wider than 3.5m, we arrange for pilot cars or police escorts. We use the **ESDAL** (Electronic Service Delivery for Abnormal Loads) system to plan routes that avoid low bridges and weak structures. Our [road freight](https://shippinginternational.co.uk/services/road-freight/) specialists manage these permits to prevent your truck from being held up by the DVSA.

  ## Lashing, Securing, and Physics

Once at the port, we secure your module to the flat rack using industrial lashing. This is not just about tying it down; it is an engineering task. The module must withstand the pitching and rolling of an Atlantic or Pacific crossing.

### Physics of Lashing

We follow the IMO standards for cargo securement. To prevent the module from sliding, lashing angles should not exceed 25°. To prevent tipping, we aim for angles between 45° and 60°. We never mix different lashing materials, such as steel chains and polyester straps, in the same direction, as they have different elasticities and will not share the load. We use rubber friction mats and timber chocking between the module and the steel deck to increase resistance. This prevents cargo from "walking" during heavy weather.

### Weatherproofing and Protection

Ocean air is corrosive. We shrink-wrap entire modules or use heavy-duty industrial tarpaulins to seal out salt spray. We protect all corners and lifting points to prevent the lashing equipment from damaging the module’s finish. Proper protection ensures the house looks as good at the build site as it did at the factory.

  ## Understanding Surcharges and Service Contracts

OOG shipping costs more than standard freight because of **lost slots**. If your module protrudes 10cm over the side of a flat rack, it blocks the adjacent slot on the ship. The carrier will charge you for that unusable space.

### Example of Tariff Surcharges

Your quote will include the base freight rate plus several accessorial fees. A typical OOG shipment might look like this:

- **Base Freight:** $2,500
- **Lost Slot Fee:** $1,200 per blocked slot (e.g., if height voids the cell above).
- **BAF (Bunker Adjustment Factor):** Fluctuating fuel cost, often around $150.
- **Lashing Fee:** $300 - $600 for professional rigger labour and materials.

### Service Contracts and MQCs

For high-volume manufacturers, we negotiate service contracts with carriers. These contracts include a **Minimum Quantity Commitment** (MQC). For example, a contract might state: "The shipper commits to moving 50 modules per year in exchange for a fixed rate of $2,000 per unit." This protects you from the price spikes of the spot market during **peak season**. If you fail to meet the MQC, the carrier may charge **dead freight** to cover the space they reserved.

  ## Documentation and Customs Clearance

Accurate paperwork is the only way to avoid the National Clearance Hub. Since Brexit, every movement from the UK requires a full export declaration. We use the **Customs Declaration Service** (CDS) to lodge your entries. For details on UK export rules, check the [GOV.UK guide](https://www.gov.uk/guidance/export-declarations).

### The Essential Document Set

1. **Commercial Invoice:** Must state the unit value, currency, and the specific Incoterm used (e.g., CIF or DAP).
2. **Packing List:** A detailed breakdown of every module, including net and gross weights.
3. **Certificate of Origin:** Often required to prove the goods were made in the UK to claim lower duty rates under trade agreements.
4. **ISPM15 Certificate:** Proof that any timber used for crating or cradles has been heat-treated against pests.

Our [customs clearance experts](https://shippinginternational.co.uk/services/customs-clearance/) check your documents before the truck arrives at the terminal. This prevents "manifest holds" where your cargo is flagged for inspection due to missing data.

  ## Risk Management and Insurance

Standard carrier liability is limited by weight and rarely covers the true value of a modular home. Under the Hague-Visby Rules, a carrier’s payout for a damaged module might only be a few hundred pounds. We strongly advise taking out **All Risks** marine insurance under Institute Cargo Clauses (A). This policy covers the full replacement value, including loss, damage, and **General Average**. General Average is a maritime law under which all cargo owners share the cost of saving a ship from a disaster. Insurance handles these claims on your behalf, protecting your business from financial shock.

  ## Frequently Asked Questions

#### How much does it cost to ship a modular home internationally?

Costs depend on the total cubic volume and the number of "lost slots" on the vessel. A single module move typically ranges from $5,000 to $15,000 once you factor in sea freight, lashing, and port fees. Contact us via our contact page for a bespoke quote.

#### Do I need an escort for UK road transport?

In the UK, you generally need an escort or pilot car if the module width exceeds 3.5m. If the width exceeds 4.1m, a police escort may be mandatory. We manage all [road freight](https://shippinginternational.co.uk/services/road-freight/) notifications and escorts as part of our service.

#### What is the difference between In-Gauge and Out-of-Gauge?

In-Gauge means the module fits exactly inside the standard dimensions of a container. Out-of-Gauge (OOG) means it protrudes horizontally or vertically. OOG cargo is more expensive because it takes up extra space on the ship.

#### Can you ship modules with glass and fittings already installed?

Yes, we regularly move "finished" modules. However, you must ensure that internal bracing is used to protect windows and doors from transport vibrations. We also recommend removing any external lighting or small fittings to prevent theft or breakage.

#### What is a Commodity Code, and do I need one?

A Commodity Code (or HS Code) classifies your product for [customs clearance](https://shippinginternational.co.uk/services/customs-clearance/). It determines the rate of duty you pay. Most modular homes are classified as "Prefabricated Buildings." You can check the code on the [UK Trade Tariff](https://www.gov.uk/trade-tariff).

#### Does the module's weight affect the shipping rate?

Yes. While sea freight is often calculated by volume, heavy-lift fees apply if a single module exceeds a certain weight (usually 20-30 tonnes). We provide the **VGM** data to the carrier to ensure the vessel remains stable.

  ### Ready to Optimise Your Global Logistics?

Get expert advice and a transparent, no-obligation quote for your next shipment. Contact the Shipping International team today to discover a more reliable way to ship.

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