Blue Tarps

Sigman blue tarps are 5 mil waterproof poly tarps built for roof tarps, hurricane tarps, and emergency roof cover. Woven from reinforced polyethylene with a UV-protective coating on both sides, they shed rain, block sun, and hold up to wind when secured properly. Sigman blue tarps run thicker than the super-thin blue tarps sold at most hardware stores, and ship fast (1–2 days) from our Atlanta, GA warehouse to the entire Southeast and East Coast — including Florida, Alabama, Louisiana, Texas, North Carolina, and South Carolina.

Best Uses for Blue Tarps

Emergency roof tarps — cover storm, hurricane, and wind damage fast
Temporary roof leak cover and board-up protection
Construction site, equipment, and material cover
Landscaping, woodpile, and yard debris cover
Camping, backyard, and general-purpose temporary cover

Blue Tarp Specifications

Thickness: 5 mil (true mil — never inflated)
Material: Woven reinforced polyethylene, waterproof
Construction: 3-ply — a woven polyethylene tape grid core laminated with a UV-protective coating on each side
UV coating: On both sides
Fabric weight: 2.4 oz / sq. yd.
Weave count: 8 x 8
Grommet spacing: Every 3 ft approximately
Sizes: 29 finished sizes from 5' x 7' to 100' x 100' (a finished-size tarp measures within 1–3 inches of its nominal size)

How Blue Tarps Compare to Other Poly Tarps

Blue is the 5 mil entry tier in the poly tarp family. It is the go-to color for roof, hurricane, and emergency cover. When you need a tarp that lasts more than a season or two, step up the mil ladder:

Collection	True mil	Best for
Blue Tarps (this collection)	5 mil	Roof / hurricane / emergency cover
Brown Economy Tarps	5 mil	Budget short-term cover (HOA-friendly color)
Green/Silver Tarps	8 mil	Backyard, landscaping, camping
Heavy Duty Silver Tarps	10 mil	All-weather canopy, roof, and equipment cover
Heavy Duty White Tarps	10 mil	Bright, light-blocking shade cover
Blue Tarps – Made in USA	Heavier USA-made	Longer-life blue tarp for extended outdoor use

7 Ways to Make Your Blue Tarp Last Longer

Use ball bungee cords to tie down — they stretch in wind and reduce grommet tear.
Use as many grommets as possible — wind load can reach hundreds of pounds, so distribute it.
Don't let wind get under the tarp — tamp it down and strap over the top.
Keep standing water, snow, and ice off the tarp — pooling weight sags and tears tarps.
Cover sharp corners and edges first — they are the number-one cause of tarp failure.
Don't let the tarp bear any load — a tarp covers a load, it doesn't carry one.
Buy a thicker tarp — Sigman blue tarps are heavier than typical super-thin blue tarps.

Need help choosing? Browse all roof tarps for application-based options, or explore the full poly tarps hub to compare every thickness and color. For maximum durability and UV life, see our Made in USA poly tarps.

Frequently Asked Questions

Are blue tarps waterproof enough for a roof leak?

Yes. Sigman blue tarps are made from waterproof woven polyethylene with a UV-protective coating on both sides, so they shed rain and are well suited to temporary roof leak cover, storm damage, and emergency board-up. For a tight seal, run the tarp past the leak on all sides, lap it over the roof ridge where possible, and fasten it so water runs off rather than pooling.

How long will a 5 mil blue tarp last on a roof?

A 5 mil blue tarp is designed for temporary and emergency roof cover, typically lasting a few weeks to a few months outdoors depending on sun, wind, and how well it is secured. For longer-term cover, step up to a heavier poly tarp such as a 10 mil Heavy Duty Silver tarp or a Made in USA blue tarp.

What size blue tarp do I need to cover my roof?

Measure the area you need to cover and add at least 3 to 4 feet on every side so the tarp can lap over the roof ridge and be anchored beyond the damage. Blue tarps come in 29 finished sizes from 5' x 7' up to 100' x 100', so you can cover anything from a small leak to an entire roof.

How do I secure a blue tarp on a roof in high wind or a hurricane?

Use as many grommets as possible to distribute wind load, which can reach hundreds of pounds, and tie down with ball bungee cords that flex in gusts to reduce grommet tear. Don't let wind get under the tarp: tamp it down and strap over the top, anchor the edges with boards or sandbags, and keep standing water, snow, and ice off so the tarp doesn't sag and tear.

When should I step up from a 5 mil blue tarp to a heavier poly tarp?

Choose a 5 mil blue tarp for short-term roof, hurricane, and emergency cover. If you need the tarp to last more than a season, face heavy sun, or cover valuable equipment, move up the mil ladder: 8 mil Green/Silver for general outdoor use, 10 mil Heavy Duty Silver for all-weather cover, or Made in USA poly tarps for the longest service life.

Are Sigman blue tarps thicker than standard hardware-store blue tarps?

Yes. Sigman blue tarps are a true 5 mil thickness and run heavier than the super-thin blue tarps sold at many hardware stores. MyTarp lists actual measured thickness rather than inflated mil numbers, so the 5 mil you order is the 5 mil you receive.

How fast can blue tarps ship for storm or emergency cover?

Blue tarps ship fast from our Atlanta, GA warehouse, typically reaching the Southeast and East Coast in 1 to 2 days, including Florida, Alabama, Louisiana, Texas, North Carolina, and South Carolina. That makes them a practical choice for hurricane and storm-season emergency roof cover.

What do the 8 x 8 weave count and 3 ft grommet spacing mean?

An 8 x 8 weave count means there are 8 polyethylene strands per inch in each direction, which sets the tarp's base strength and tear resistance. Grommets spaced about every 3 feet give you frequent, evenly distributed tie-down points so you can secure the tarp tightly and spread wind load across the whole edge.