Step-by-step fix
Step 1: Make sure a tarp is the right temporary fix
- Look for active leaking, missing shingles, storm damage, or a roof area that is letting water in right now.
- Check the weather first. Plan this only when the roof surface is dry enough to work around and wind is calm.
- From inside the house, note the general leak area so you know which section of roof needs coverage.
- From the ground, estimate how large the damaged section is and plan to cover well beyond it, not just the visible hole or stain.
If it works: You have a clear leak area to cover and conditions are calm enough for a temporary tarp job.
If it doesn’t: If you cannot safely identify the leak area from inside and from the ground, use a larger coverage area or call a roofer for emergency service.
Stop if:- The roof is steep, slick, icy, very high, or unsafe to access.
- Wind, lightning, or heavy rain is still active.
- You see sagging roof decking, a soft roof surface, or signs the structure may be weakened.
Step 2: Set up safely and stage the tarp
- Place the ladder on firm, level ground and extend it securely above the roof edge if needed for access.
- Put on gloves and keep tools in a belt or bucket so your hands stay free while climbing.
- Unfold the tarp on the ground first and confirm it is large enough to extend several feet past the suspected leak area.
- If you can, plan the tarp so the upper edge goes over the roof peak. That helps water shed over the tarp instead of running under it.
If it works: Your ladder is stable, your tools are ready, and the tarp is sized and oriented before you go up.
If it doesn’t: If the tarp is too small, stop and get a larger one rather than trying to patch together a short cover over the leak.
Stop if:- You cannot set the ladder securely on stable ground.
- The tarp is too awkward to handle safely in the current wind.
Step 3: Position the tarp over the damaged section
- Carry or pull the tarp into place carefully without dragging yourself onto a weak-looking section of roof.
- Center the tarp over the leak area so it extends past the damage on all sides.
- Smooth the tarp flat so there are no big pockets where water can collect or wind can grab.
- Keep the lower edge directed downhill so water will run off the roof instead of backing up under the cover.
If it works: The damaged area is fully covered and the tarp lies flat in the direction water naturally flows.
If it doesn’t: If the tarp will not lie flat because of roof shape or obstacles, reposition it or use a larger tarp that gives you more overlap.
Stop if:- The roof surface feels soft, spongy, or unstable underfoot.
- You discover the damage extends much farther than expected or includes a large hole or broken decking.
Step 4: Secure the top and sides so wind cannot lift it
- Wrap the tarp edge around a wood strip at the top and fasten through the strip with exterior screws so the tarp is clamped rather than just punctured at the edge.
- If possible, secure that top edge on the far side of the roof peak or high enough above the leak that water cannot run under it.
- Fasten additional wood strips along the sides to hold the tarp snug against the roof.
- Pull the tarp tight as you work so it stays smooth and does not flap.
If it works: The top and sides are clamped down tightly and the tarp is not loose enough to catch wind.
If it doesn’t: If the tarp still billows or lifts, add more holding strips and tighten the layout before leaving it in place.
Stop if:- Fasteners will not hold because the roof edge or decking is badly deteriorated.
- You cannot secure the upper edge well enough to keep water from getting underneath.
Step 5: Finish the lower edge and clear the runoff path
- Secure the lower edge enough to keep it from flapping, but do not create a pocket that traps water.
- Make sure the tarp sheds water over the shingles and off the roof naturally.
- Clear loose branches, leaves, or debris that could dam water above the tarp.
- From the ground, look up and confirm the tarp is lying flat with no obvious gaps, lifted corners, or sagging sections.
If it works: The tarp is fully secured and water has a clear path to run off the roof.
If it doesn’t: If you see sagging or trapped water areas, re-tension the tarp and adjust the lower edge so runoff stays smooth.
Stop if:- Water would be forced under the tarp because of the way it is folded or fastened.
- The tarp blocks drainage and creates a pooling area on the roof.
Step 6: Check that the temporary repair is actually holding
- During the next rain or with light water exposure from a safe ground-level check, watch the interior leak area for new drips or spreading stains.
- Inspect ceilings, attic areas, or wall surfaces near the original leak path for continued moisture.
- Look at the tarp from the ground after wind or rain to make sure it has not shifted or loosened.
- Plan for permanent roof repair as soon as practical, since a tarp is only a temporary measure.
If it works: No new water is getting inside, and the tarp remains tight and in place after real weather.
If it doesn’t: If water is still getting in, the covered area may be too small, water may be entering higher up, or the tarp may not be sealed tightly enough. Re-cover a larger section if it can be done safely, or call a roofer.
Stop if:- Interior leaking gets worse even with the tarp in place.
- The tarp tears loose, shifts significantly, or exposes damaged roof again.
- You find widespread hidden water damage, mold growth, or ceiling sagging inside the home.
FAQ
How long can a roof tarp stay on?
Only as a temporary measure. A well-secured tarp may hold for a short period, but sun, wind, and rain wear it down quickly. Schedule permanent roof repair as soon as you can.
Should the tarp go over the roof peak?
If possible, yes. Running the top edge over the peak helps keep water from getting under the tarp from above. If that is not practical, the top edge still needs to be high enough and secured tightly enough to shed water.
Can I just nail the tarp around the leak?
That usually does not hold well enough and can tear the tarp. Clamping the tarp with wood strips spreads the load better and helps keep wind from pulling it loose.
What size tarp do I need?
Use one large enough to extend well beyond the visible damage on all sides. Covering only the exact leak spot often fails because water can travel under shingles before it shows up inside.
Is it safe to tarp a roof by myself?
Sometimes, but only if the roof is low enough, conditions are calm, and you can work without stepping onto unsafe areas. If the roof is steep, slick, storm-damaged, or hard to access, it is safer to call a pro.