What size tarp do I need for a roof?

Measure the damaged area, then add at least 4 feet on every side for overlap. A standard 20x30 ft poly tarp covers most single-story residential damage patches, but buy one size up — a tarp that's too large causes no harm, while one that's too small leaves edges exposed.

How do I keep a roof tarp from blowing off?

Sandwich the tarp edges between pairs of 2x4 boards screwed together through the tarp into the roof deck every 12 to 18 inches. The boards distribute load so the tarp can't tear free. Avoid relying on sandbags or rocks alone — they shift in wind and can slide off.

Can I tarp a roof myself or do I need a professional?

A single-story roof with accessible eaves is a reasonable DIY job for a careful homeowner in dry conditions. Steep pitches, second stories, wet surfaces, or structural damage make the job genuinely hazardous — hiring a local roofer for emergency tarping is the safer and often faster option.

Does insurance cover emergency roof tarping?

Most homeowner policies cover reasonable emergency mitigation costs, including tarping, under the 'protect property from further damage' clause. Document everything with photos and keep receipts. Call your insurer before paying a third party to tarp, and never pay out-of-pocket for emergency work without written authorization from the contractor.

How long can a tarp stay on a roof?

A quality 6-mil poly tarp typically holds 90 days in moderate weather; UV degrades thinner tarps faster. Treat any tarp as a temporary patch — 30 days or less is ideal. Permanent repairs should follow a professional inspection as soon as materials and labor are available.

Can a contractor waive my deductible for emergency roof tarping?

No. In most states it is illegal for a contractor to waive, absorb, or discount a homeowner's insurance deductible. Any offer to 'eat your deductible' is a red flag for insurance fraud — decline it and find a different contractor.

How to Tarp a Damaged Roof (Step by Step)

Key takeaways

Act fast but safely — a tarp installed within hours of storm damage can prevent thousands of dollars in secondary water damage to insulation, ceilings, and framing.
The tarp must go OVER the ridge, not just over the hole, so rain sheds down and away rather than pooling under the edge.
2x4 board anchors beat sandbags — boards distribute load evenly and won’t shift in wind the way loose weights do.
Document before you cover anything — photograph every damaged area from multiple angles before the tarp goes on; your adjuster needs those images.
A tarp buys time, not a repair — schedule a professional inspection within days, not weeks.

What materials do you need to tarp a roof?

Gather everything before climbing — a single trip down to fetch a missed item is where accidents happen.

Item	Spec / notes
Poly tarp	6-mil or heavier; blue, silver, or brown; size the damaged area + 4 ft on every side
2x4 lumber	Two boards per tarp edge; cut to match tarp width
3-inch deck screws	Enough for one every 12–18 in along each board pair
Drill / driver	Cordless for roof work
Ladder	Tall enough to reach eaves without overreaching
Non-slip footwear	Rubber-soled work boots; no sneakers
Safety rope or harness	Required for pitches steeper than 6:12
Utility knife	To trim tarp if needed

A 6-mil poly tarp handles most emergency patches; heavier contractor-grade tarps last longer but are stiffer to work with solo.

How do you safely get onto a damaged roof?

Never walk a wet, steep, or structurally compromised roof. Before you climb:

Wait until the roof surface is completely dry.
Inspect from the ground and ladder first — confirm the deck beneath the damaged area is solid, not spongy or collapsed.
On pitches steeper than 6:12 (a rise of more than 6 inches per foot of run), tie off to a ridge anchor or hire a pro.
Have a second person on the ground to stabilize the ladder and hand up materials.

For most single-story homes with a moderate pitch and accessible eaves, a careful homeowner can complete this job. On anything taller or steeper, the cost of professional emergency tarping — typically $200–$500 — is far less than a fall-related injury or a botched tarp job that lets water in.

How do you install a roof tarp step by step?

Follow these steps in order. Do not skip the ridge overlap — it’s the most common mistake that turns a tarp into a funnel.

Photograph everything first. Before moving a single piece of debris, take photos from ground level and from your ladder. Your adjuster needs this record.
Clear loose debris. Remove branches and shingle fragments that could puncture the tarp or cause a slip.
Size the tarp. Confirm it extends at least 4 feet past the ridge and at least 4 feet beyond the damaged area on both sides.
Drape the tarp over the ridge. The uphill edge goes several feet down the opposite (undamaged) slope — this creates a watertight fold so rain sheds away rather than wicking underneath.
Sandwich the tarp with 2x4 boards. Place one board on top of the tarp at the ridge, one underneath on the deck, and screw them together every 12–18 inches. Repeat at the lower edge and both sides.
Smooth all edges flat — no air pockets or folds that could catch wind — then let the downhill edge overlap the eave so water drains into the gutter, not behind the fascia.

How is a tarp anchored so it won’t blow off in wind?

The 2x4 sandwich method is the industry standard for temporary tarping. Here’s why it works better than alternatives:

Anchoring method	Wind resistance	Risk of further damage
2x4 board sandwich (screwed)	High	Low — screws into deck, not shingles
Sandbags / concrete blocks	Moderate	High — heavy objects slide and puncture
Roofing nails through tarp alone	Low	High — tarp tears at nail holes in wind
Cap strips stapled to shingles	Moderate	Moderate — staples pull through wet shingles

Screw the boards into the roof deck (the plywood or OSB beneath the shingles), not just into shingles. Shingles compress and the grip is weak. Deck screws hold.

When should you call a pro instead of tarping yourself?

Call a local roofer for emergency tarping if any of these apply:

Structural damage — rafters, decking, or ceiling joists are visibly broken or deflected.
Steep pitch — anything above 6:12 significantly raises fall risk without proper harness gear.
Second story or higher — ladder work above single-story height requires proper fall protection.
Large or complex damage — a single missing shingle is a DIY patch; a 20-foot hole from a fallen tree is not.
Active rain or wind — tarping in ongoing weather is dangerous and the tarp won’t seat properly.

A vetted local roofer can typically respond within 24–48 hours. Be cautious of out-of-state storm chasers who show up door-to-door — they often overcharge and are gone before you discover the problems.

What should you do after the tarp is on?

A tarp in place is not the end of the process — it’s the start of the insurance and repair workflow.

Call your insurer the same day. Report the damage, ask about emergency mitigation coverage, and get a claim number before authorizing any paid work.
Document the tarp. Date-stamped photos of the installed tarp show your insurer you took reasonable steps to prevent further damage.
Schedule an inspection within days. A tarp covers the obvious hole; a roofer will find hidden damage — fractured decking, compromised flashing, saturated insulation.
Keep receipts. DIY hardware costs and professional tarping invoices are typically reimbursable under your policy’s mitigation clause.
Never accept a deductible waiver. If a contractor offers to waive your deductible, walk away — it is illegal in most states and a red flag for insurance fraud.

Enter your address to check NOAA storm radar data for your area and get connected with one vetted local roofer — no door-knocking storm chasers, no resold leads.