Shrink wrap is commonly used to protect boats, recreational vehicles, machinery and other large items during storage and transportation. It creates a durable protective barrier against weather and debris, but depending on the application, there is another important factor to consider: ventilation.
When an item is enclosed for an extended period, moisture already present beneath the wrap can become trapped. Changes in temperature can also contribute to condensation. In applications where moisture buildup is a concern, adding ventilation can help promote airflow beneath the shrink film.
Why Is Ventilation Important Under Shrink Wrap?
One of the main reasons to consider ventilation is moisture management.
When an item is wrapped for storage, moisture can remain inside the enclosed area. As temperatures rise and fall, condensation may develop beneath the shrink film. Over an extended storage period, trapped moisture can contribute to problems such as mold, mildew, odors and moisture-related damage.
Ventilation allows air to move beneath the shrink wrap and can help reduce trapped moisture and condensation.
However, not every shrink wrap application should be ventilated. Some products are intentionally sealed from outside air for storage or transportation. Whether ventilation is appropriate depends on what is being wrapped, why it is being wrapped and the conditions in which it will be stored.
What Types of Shrink-Wrapped Items May Benefit From Ventilation?
Boats, Pontoons and Personal Watercraft
Boats are one of the most common examples. Shrink wrap is widely used to protect boats during seasonal storage, particularly throughout the winter months. Ventilation can help manage moisture and condensation underneath the wrap while the boat is stored.
RVs and Campers
RVs and campers may also be shrink-wrapped for seasonal or long-term storage. Depending on the storage environment and wrapping method, ventilation may help manage trapped moisture.
Recreational Vehicles
ATVs, UTVs, snowmobiles and other recreational vehicles can also be protected with shrink wrap. The need for ventilation will depend on the particular vehicle, how it is wrapped and its storage conditions.
Machinery and Large Components
Heavy duty shrink film is used to protect machinery and large components from weather, dirt and debris during storage and transportation. In applications where moisture and condensation are a concern, ventilation may be appropriate.
Agricultural and Construction Machinery
Large agricultural and construction machinery may also be protected with shrink film during storage or transportation. As with other applications, ventilation needs should be determined by the item being protected and its storage environment.
Frequently Asked Questions About Shrink Wrap Ventilation
Does shrink wrap need to be ventilated?
Not always. Ventilation can be beneficial when airflow is desired to help manage trapped moisture and condensation during storage. Other shrink wrap applications are intentionally sealed, so the appropriate approach depends on what is being protected and why it is being wrapped.
Why does condensation form underneath shrink wrap?
Moisture can already be present when an item is wrapped. As temperatures change, moisture in the enclosed air can condense on surfaces beneath the shrink film. This is one reason ventilation is commonly considered for long-term and seasonal storage applications.
Can shrink wrap cause mold or mildew?
Shrink wrap itself does not cause mold or mildew, but moisture trapped beneath a covering can create conditions where mold and mildew are more likely to develop. Providing appropriate ventilation can help manage moisture beneath the wrap.
Do shrink-wrapped boats need ventilation?
Ventilation is commonly used with shrink-wrapped boats during seasonal storage to promote airflow and help manage moisture and condensation underneath the covering.
Can shrink wrap vents be used on things other than boats?
Yes, depending on the application. Shrink film is used to protect RVs, recreational vehicles, machinery and other large products in addition to boats. If ventilation is appropriate for the particular storage application, a vent designed for shrink film may provide a way to introduce airflow beneath the covering.
Where should vents be placed in shrink wrap?
Vent placement should allow air to circulate throughout the enclosed area rather than concentrating ventilation in one location. The appropriate number and placement will vary based on the size and shape of the wrapped item.
Should shrink wrap be completely airtight?
It depends on the purpose of the wrap. Some industrial packaging applications are designed to create a sealed environment. Seasonal storage applications may instead benefit from airflow beneath the covering. There is no single approach that applies to everything being shrink-wrapped.
Can you cut a hole in shrink wrap to add a vent?
Ventilation openings can be made in shrink film, but the installation method depends on the vent being used. Some systems require additional cutting or tape.
Boat VentĀ® Shrink uses built-in cutting teeth to pierce the shrink film, eliminating the need for a razor during installation. The strong adhesive gasket then bonds directly to the vent and shrink film.
When should ventilation be added?
Ventilation should be considered as part of the wrapping and storage process rather than after moisture problems have already developed. The specific needs will depend on the item, environment, storage duration and type of shrink wrap application.
Looking for an Easier Way to Add Ventilation?
For applications where ventilation is appropriate, Boat VentĀ® Shrink provides a quick and easy way to add airflow through shrink film.
Installation takes four simple steps: pierce and twist, peel, press and reattach the top.
No Razors. No Shrink Tape. No Wasted Time.
Want to learn more about Boat VentĀ® Shrink? Explore Vico Marine.
Want to Try One for Yourself?
See how easy Boat VentĀ® Shrink is to install. Request a free sample today!
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