5 Mil vs 10 Mil vs 20 Mil Tarps: Which Thickness Do You Need?
Choosing the right tarp thickness can make a big difference in how well a tarp fits a particular job. Some projects only need light coverage for a short period. Others require a thicker tarp for outdoor storage, equipment, construction materials, or repeated use.
One of the easiest ways to compare poly tarps is by their mil thickness. Common options include 5 mil, 10 mil, and 20 mil tarps. Each thickness serves a different purpose.
This guide explains the difference between these tarp thicknesses, how they are commonly used, and what to consider before choosing one.
What Does Mil Mean on a Tarp?
The word mil refers to the thickness of the tarp material.
One mil equals one thousandth of an inch.
For example:
- 5 mil = 0.005 inch
- 10 mil = 0.010 inch
- 20 mil = 0.020 inch
A higher mil number generally means the tarp material is thicker.
However, thickness is not the only factor that matters. Material construction, reinforced edges, grommets, weave, size, and intended use can also affect how a tarp performs.
Because of this, tarp thickness should be considered together with the type of job you need to complete.
5 Mil Tarps
A 5 mil tarp is one of the lighter poly tarp options.
These tarps are useful when you need practical coverage without the extra weight of a thicker material. They can be easier to handle, fold, move, and store.
Common Uses for 5 Mil Tarps
A 5 mil poly tarp may be suitable for:
- temporary outdoor coverage
- household projects
- camping
- landscaping
- covering small equipment
- protecting materials during short term storage
- general yard work
- covering furniture or supplies
Because the material is lighter, a 5 mil tarp can be a practical choice when portability and easy handling are important.
When to Consider a 5 Mil Tarp
A 5 mil tarp may work well when the project does not require a very thick covering.
For example, if you need a tarp for general outdoor use, occasional protection, or temporary coverage, a lighter tarp may be enough.
Before choosing one, check the product size, material details, edge construction, and intended application.
10 Mil Tarps
A 10 mil tarp provides a thicker layer of material than a 5 mil option.
It offers a useful middle ground between lightweight general purpose tarps and much thicker heavy duty options.
For many customers, this thickness can be suitable for regular outdoor projects where added material strength is useful.
Common Uses for 10 Mil Tarps
A 10 mil poly tarp may be used for:
- equipment coverage
- construction materials
- outdoor storage
- trucks and trailers
- landscaping projects
- building materials
- machinery coverage
- temporary work areas
- general commercial applications
Because the material is thicker than a 5 mil tarp, it may be better suited for jobs where the tarp will be exposed to more handling or outdoor conditions.
When to Consider a 10 Mil Tarp
Choose a 10 mil tarp when you need more substantial coverage but do not necessarily need the thickness of a 20 mil tarp.
It can be a practical option for customers who want a balance between weight, handling, and material thickness.
20 Mil Tarps
A 20 mil tarp is considerably thicker than 5 mil and 10 mil options.
This type of tarp is generally chosen for more demanding applications where a heavier material is preferred.
Because of the added thickness, a 20 mil tarp may also be heavier and less flexible than thinner alternatives.
Common Uses for 20 Mil Tarps
A 20 mil poly tarp may be suitable for:
- larger equipment
- construction projects
- outdoor material storage
- heavy equipment coverage
- commercial work areas
- transportation applications
- long term covering needs
- demanding outdoor projects
A thicker tarp can be useful when the covering will experience more frequent handling or when a heavier material is preferred.
When to Consider a 20 Mil Tarp
A 20 mil tarp may be worth considering when material thickness is one of your main priorities.
It can also be suitable for projects where a lightweight tarp may not provide the type of coverage you need.
However, thicker does not automatically mean better for every job. A 20 mil tarp may be unnecessary for simple household or short term applications.
5 Mil vs 10 Mil vs 20 Mil Tarp Comparison
| Feature | 5 Mil Tarp | 10 Mil Tarp | 20 Mil Tarp |
|---|---|---|---|
| Material Thickness | Light | Medium | Thick |
| Handling | Easier to move and fold | Moderate | Heavier |
| Typical Use | General and temporary coverage | Regular outdoor and work use | More demanding applications |
| Storage | Compact | Moderate | Requires more space |
| Weight | Lighter | Medium | Heavier |
| Best Fit | Everyday projects | Equipment and jobsite use | Heavy coverage needs |
This comparison should be used as a general guide. Individual tarp specifications may vary by product.
Which Tarp Thickness Is Right for You?
The right tarp thickness depends on how and where you plan to use it.
Choose 5 Mil If You Need
- lightweight coverage
- easy handling
- temporary protection
- general outdoor use
- a tarp that is easy to store
Choose 10 Mil If You Need
- a thicker tarp for regular use
- equipment or material coverage
- construction or outdoor applications
- a balance between thickness and handling
Choose 20 Mil If You Need
- heavier material
- coverage for demanding projects
- equipment or commercial applications
- a thicker tarp for repeated use
The goal is not simply to choose the thickest tarp available. Instead, choose a thickness that matches your project.
Other Factors to Consider When Choosing a Tarp
Mil thickness is important, but it should not be the only factor in your decision.
Tarp Size
Measure the area or object you want to cover before selecting a tarp.
A tarp that is too small may not provide enough coverage. A tarp that is much larger than needed may be more difficult to secure.
Grommets
Grommets provide attachment points for rope, bungee cords, tie downs, or other securing methods.
Check the grommet placement and spacing if you plan to fasten the tarp around equipment or materials.
Reinforced Edges
Reinforced edges can provide extra support around the perimeter of the tarp.
This can be useful when the tarp needs to be secured at several points.
Material Features
Depending on the product, poly tarps may include features such as:
- water resistance
- UV treatment
- tear resistance
- reinforced corners
- woven polyethylene construction
Always check the individual product details before choosing a tarp for a specific application.
Does a Thicker Tarp Always Last Longer?
Not necessarily.
Thickness can contribute to the overall strength of a tarp, but product life also depends on several other factors.
These may include:
- how the tarp is secured
- frequency of use
- exposure to weather
- contact with sharp surfaces
- wind movement
- storage conditions
- material construction
A thinner tarp used correctly may be more suitable for a simple project than a heavier tarp that is unnecessary for the application.
What Tarp Thickness Is Best for Outdoor Use?
There is no single tarp thickness that suits every outdoor project.
A 5 mil tarp may be suitable for lighter or temporary outdoor use.
A 10 mil tarp may be more appropriate for regular equipment, storage, or worksite coverage.
A 20 mil tarp may be considered for heavier applications where thicker material is preferred.
The most suitable option depends on the project, environment, and how often the tarp will be used.
Final Thoughts
The main difference between 5 mil, 10 mil, and 20 mil tarps is material thickness.
A 5 mil tarp offers lightweight and practical coverage for general use. A 10 mil tarp provides a thicker option for regular outdoor, equipment, and worksite applications. A 20 mil tarp offers heavier material for more demanding coverage needs.
Before choosing a tarp, consider the size, thickness, material construction, grommets, reinforced areas, and intended application.
Choosing the right tarp does not mean selecting the thickest option. It means selecting the tarp that best fits the job. You can also explore our range of heavy duty tarps for different outdoor, commercial, and general covering needs.
Frequently Asked Questions
What does 5 mil mean on a tarp?
A 5 mil tarp has material that is approximately 0.005 inch thick.
Is a 10 mil tarp thicker than a 5 mil tarp?
Yes. A 10 mil tarp has approximately twice the material thickness of a 5 mil tarp.
Is a 20 mil tarp heavy duty?
A 20 mil tarp is a thick tarp option and is commonly used for more demanding applications. Actual performance still depends on the individual product construction and intended use.
What thickness tarp should I use for outdoor storage?
The right thickness depends on what you are covering, how long it will be stored, and the surrounding conditions. Lighter projects may work with 5 mil, while 10 mil or 20 mil options may be more suitable for heavier coverage needs.
Is a thicker tarp always better?
No. A thicker tarp may offer more material, but it may also be heavier and harder to handle. Choose the thickness that matches your specific application.