Detailed Answer
Emergency roof tarping prevents water damage until permanent repairs can be made. If you must do this yourself, safety comes first.
Safety warnings
- Never tarp a roof during rain, wind, or lightning
- Use a sturdy extension ladder secured at the top
- Wear rubber-soled shoes with good grip
- Have a helper on the ground at all times
- If the roof is steep (6:12 or greater), call a professional
Materials needed
- Heavy-duty poly tarp (10 mil minimum, blue or silver)
- Size: at least 4 feet larger than the damaged area on each side
- Four to six 2x4 lumber pieces (8 feet long)
- 3-inch wood screws (not nails — they pull out)
- Cordless drill/driver
- Utility knife
Step-by-step process
Size the tarp
Unfold the tarp on the ground. It must cover from the ridge (top) of the roof past the damaged area to the eave (bottom) with 4 feet of excess on each side.
Anchor the top edge
Lay a 2x4 along the top edge of the tarp. Wrap the tarp around the board and screw through both into the roof deck every 12-16 inches.
Smooth the tarp down
Pull the tarp taut over the damaged area and down to the eave.
Anchor the bottom
Wrap the bottom edge around another 2x4. The weight of the board holds it in place, or screw into the fascia.
Secure the sides
Wrap each side edge around 2x4s or weight with sandbags. Do not leave loose edges that wind can catch.
Inspect from inside
Check from the attic to verify the tarp covers all damaged areas.
Professional tarping
Most roofing companies offer emergency tarping for $200-$500. This is strongly recommended for steep roofs, large damage areas, or if you are not comfortable working at height. Emergency tarping costs are typically reimbursable through homeowners insurance.