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How to Choose a Tarp for Roof Leak Emergencies

A large roof covered in two tarps weighed down with sandbags.

Grextor Inc. |

TL;DR: Choosing the right tarp for roof leak emergencies can help limit water intrusion and protect your home until permanent repairs are made. Tarp size, thickness, durability, and secure installation all play an important role in effective temporary roof protection.

  • Choose a tarp large enough to extend several feet beyond the damaged portion of the roof.
  • Consider heavy-duty tarps for severe damage, harsh weather, or longer periods of use.
  • Look for weather-resistant materials, reinforced edges, and sturdy grommets for added durability.
  • Properly securing the tarp helps prevent wind from lifting or damaging it.
  • Treat emergency roof tarping as a temporary fix and arrange permanent roof repairs as soon as possible.

A leaking roof can quickly turn from a minor inconvenience into a serious problem. Rainwater entering your home can damage insulation, ceilings, drywall, flooring, furniture, and personal belongings. If permanent roof repairs can’t happen immediately, covering the affected area with a tarp can help limit additional water damage.

Choosing the right tarp for roof protection is an important part of the process. Size, thickness, material, durability, and installation method can all affect how well the tarp performs. An emergency roof tarp isn't intended to replace professional roof repairs, but the right product can provide valuable protection until the damaged section can be properly addressed.

Here’s what to consider when selecting a tarp during a roof leak emergency.

Assess the Roof Damage First

Before choosing a tarp, determine the approximate location and extent of the roof damage. Missing shingles, storm damage, fallen branches, damaged flashing, and punctures can all allow moisture to enter a home.

Keep in mind that the visible leak inside the house may not be directly underneath the damaged area. Water can travel along rafters, decking, insulation, and other building materials before becoming visible.

If conditions are dangerous, avoid climbing onto the roof. Wet roofing materials can be extremely slippery, and storm-damaged structures may be unstable. Professional emergency roof tarping may be the safer option when significant structural damage has occurred.

Choose a Tarp Large Enough to Cover the Damage

One of the most important considerations is tarp size. A tarp that barely covers the visible damage may not provide enough protection during wind-driven rain.

Ideally, the tarp should extend several feet beyond the damaged section. This provides additional coverage and gives you more material for securing the tarp.

For some roof leaks, the tarp may need to extend over the roof ridge. Covering the ridge can help prevent rain from running underneath the upper edge of the tarp. Measure the damaged area whenever it is safe and practical to do so, then select a tarp with enough additional material to create generous overlap.

Having several tarp sizes available before severe weather arrives can also make emergency preparation easier.

Consider the Tarp's Thickness

Tarps are available in different thicknesses, commonly measured in mils. In general, thicker tarps provide greater resistance to punctures, tearing, and demanding outdoor conditions.

Grextor offers multiple tarp grades, so you can match the thickness and durability to the job instead of automatically choosing the thickest option. For roof emergencies, consider the severity of the damage, weather exposure, roof surface, and expected length of use.

4.2 Mil Light Duty Tarps

A 4.2 mil light-duty tarp is suited to basic, short-term covering needs. It can be useful for protecting materials, supplies, or areas around a repair project in relatively mild conditions. For roof emergencies, this grade is better suited to very temporary applications than extended exposure to severe weather.

5 Mil General Purpose Tarps

A 5 mil general-purpose tarp adds versatility for everyday covering and protection. It can be used around the home, yard, jobsite, or repair area and may provide short-term coverage when conditions are not especially demanding.

6 Mil Medium Duty Tarps

A 6 mil medium-duty tarp provides a step up in durability for outdoor projects, equipment protection, construction materials, and temporary weather coverage. For minor roof damage requiring temporary protection, medium-duty material may be appropriate when severe wind, debris, or prolonged exposure aren't expected.

8 Mil Multipurpose Tarps

An 8 mil multipurpose tarp balances flexibility and durability for more demanding residential and commercial applications. It can be a practical choice for temporary roof coverage, construction projects, equipment, landscaping materials, and other outdoor uses where a lighter tarp may not provide enough durability.

10 Mil Heavy Duty Tarps

A 10 mil heavy-duty tarp is a stronger option for emergency roof coverage exposed to rain, wind, rough surfaces, and debris. This grade is well suited to more demanding temporary protection jobs and can provide additional confidence when repairs cannot happen immediately.

16 Mil Ultra Heavy Tarps

A 16 mil ultra-heavy tarp is designed for demanding applications where greater resistance to wear and outdoor exposure is needed. Consider this grade for larger damaged areas, extended temporary coverage, heavy equipment, construction materials, or situations where the tarp may encounter rough surfaces and challenging weather.

20 Mil Extreme Duty Tarps

A 20 mil extreme-duty tarp provides Grextor's highest level of tarp protection for particularly demanding applications. It can be appropriate when maximum durability is the priority, including severe roof damage requiring extended temporary coverage, large construction projects, equipment protection, and exposure to harsh outdoor conditions.

Fire-Retardant Tarps

Fire-retardant tarps are intended for applications where flame resistance is an important project requirement. They may be appropriate for certain construction, industrial, renovation, and jobsite environments. Always confirm that the tarp's specifications and certifications meet the requirements of the specific application.

For emergency roofing, thicker isn't automatically better. A heavier tarp can offer greater durability, but it is also heavier to handle and secure. Choose a grade appropriate for the conditions and prioritize safe, secure installation.

A heavily damaged roof patched up with two tarps and lumber.

Think About How Long You Need the Tarp

An emergency roof tarp should generally be considered a temporary fix, not a substitute for repairing the underlying problem. Still, the amount of time before repairs can begin can influence which tarp makes sense.

If a roofer can arrive within a day or two, a general-purpose or medium-duty tarp may provide suitable temporary coverage under appropriate conditions. If repairs may take longer because of widespread storm damage, contractor availability, insurance inspections, or material delays, a heavier tarp may be preferable.

A long-term roof tarp should offer increased durability and resistance to outdoor exposure. Even then, tarps should be inspected regularly. Wind, UV exposure, sharp surfaces, and changing weather conditions can weaken a tarp over time.

Look for Durable, Weather-Resistant Materials

Roof tarps need to deal with more than rain. Wind can pull at their edges, sunlight can weaken some materials, and debris can cause abrasions and punctures.

Look for a tarp constructed for outdoor use with water-resistant or waterproof properties appropriate for the application. Reinforced edges and sturdy grommets can also make installing a tarp and keeping it secured easier.

For demanding jobs, heavy duty roof tarps offer added strength that can be valuable during extended periods of bad weather.

Color may also matter. Some tarp colors can blend better with a building or surrounding environment, while others provide greater visibility. For an emergency, however, durability, coverage, and proper installation should generally take priority over appearance.

Understand How to Tarp a Roof Safely

Learning how to tarp a roof involves more than simply laying a sheet of material over damaged shingles. The tarp must be positioned so rain flows over it rather than underneath it, and it needs to remain secure during changing weather.

Depending on the roof and tarp, installation may involve boards or other appropriate fastening methods to hold the tarp in position. The upper portion needs to prevent water from flowing beneath the covering, while the sides and lower portion should be secured against wind.

Avoid creating areas where water can pool. Standing water adds considerable weight and can place additional stress on both the tarp and the damaged roof.

Most importantly, do not attempt emergency roof tarping when conditions make accessing the roof unsafe. High winds, rain, lightning, ice, steep slopes, and structural instability can make roof work extremely hazardous.

Pay Attention to Grommets and Reinforced Edges

The strongest tarp will provide limited protection if it can't be secured properly.

Grommets provide convenient attachment points around the tarp. Reinforced corners and edges can reduce the chance of material tearing around those points when subjected to tension.

However, grommets alone aren't always sufficient for securing the tarp to a roof, particularly during high winds. Proper installation methods should distribute tension and keep the material from flapping excessively.

A loose tarp can quickly become damaged, and wind getting underneath it can potentially pull the entire covering away from the roof.

Act Quickly to Reduce Water Damage

Even a relatively small roof leak can cause substantial water damage if left unattended. Moisture can soak insulation, stain ceilings, damage drywall, affect electrical components, and create conditions that encourage mold growth.

Once you notice roof leaks, move furniture, electronics, and other valuables away from affected areas when possible. Use containers to catch dripping water and take appropriate steps to reduce moisture inside the home.

Then address the source of the leak as quickly as conditions safely allow. Installing an appropriate tarp for roof protection can help prevent additional rain from entering until permanent repairs are completed.

Keep Emergency Tarps on Hand

Roof leaks rarely occur at convenient times. Severe storms can also create a sudden spike in demand for tarps, roofing materials, and repair contractors.

Keeping one or more quality tarps with your emergency supplies means you don't have to search for one after damage has already occurred. Consider storing multiple sizes and duty levels so you have options for different situations.

Homeowners, property managers, contractors, restoration companies, and maintenance crews may benefit from keeping heavy duty roof tarps readily available, particularly in areas prone to thunderstorms, high winds, hail, hurricanes, or other severe weather.

Protect Your Home With the Right Tarp

A tarp can't repair broken shingles, damaged flashing, punctured decking, or other structural problems. What it can do is provide an important layer of temporary protection while you arrange permanent repairs.

Choosing the right size and durability level, covering the entire damaged area, and properly securing the tarp can help limit additional moisture intrusion. For larger or more demanding applications, a heavy duty tarp can provide the added durability needed to withstand challenging outdoor conditions.

When a storm or unexpected leak causes roof damage, acting quickly can make a major difference. A properly selected emergency roof tarp can help protect your home, minimize additional water damage, and give you valuable time to arrange the permanent repairs your roof needs.

Choose the Right Tarp Before the Next Storm

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