Emergency Roofing Repair: Tarps, Patches, and Temporary Fixes

Immediate Triage: Finding the Damage

Do this from inside first if conditions allow. Get into the attic with a flashlight and look for:

• Daylight coming through (obvious hole or missing shingles)
• Water stains or active drips
• Wet insulation
• Damaged or shifted roof decking

Map the damage location relative to a visible landmark — a chimney, a vent pipe, a ridge line — so you can find it precisely from the roof.

Emergency Tarp Installation

The tarp method is temporary but effective. Installed correctly, a tarp holds through moderate wind and rain.

Materials:

• Heavy-duty polyethylene tarp, large enough to cover the damaged area plus 4 feet overhang on all sides
• 2x4 lumber pieces cut to tarp width (to weight the edges)
• 1-inch x 2-inch furring strips and screws (for a more secure installation)
• Rope and sandbags if anchoring from interior

Method 1: Over-the-ridge installation (strongest)

Method 2: Secured-edge installation (for smaller damage not near the ridge)

Lay the tarp over the damaged area. Secure all four edges by screwing furring strips over the tarp perimeter directly into the roof decking. This is fast but relies on the screws holding — in high wind, it can fail.

Method 3: Interior anchor (when getting on the roof is unsafe)

For small holes, toss a rope with a weighted end over the ridge, pull the tarp up from the inside using the rope threaded through the attic access, and weight the tarp interior with sandbags placed on the attic floor. The tarp drapes over the hole from outside. Not as secure as mechanical fastening but protects against rain until safe roof access is possible.

Patching Missing or Damaged Shingles

Three-tab asphalt shingles (the most common residential roofing) can be replaced individually with basic tools.

Tools needed: Flat pry bar, hammer, roofing nails, roofing cement (asphalt-based, comes in a tube or can), replacement shingles (same thickness and style), putty knife, and tin snips.

Replacing a missing or damaged shingle:

For cracked but intact shingles: Spread roofing cement under the crack with a putty knife, press the crack closed, and apply a thin layer of roofing cement over the crack surface. Cover with a small piece of fiberglass mesh tape and apply a second coat of roofing cement over the tape.

Repairing Lifted or Broken Flashing

Flashing is the metal (typically aluminum or galvanized steel) at joints — around chimneys, at roof valleys, at vent pipes, and at wall-to-roof transitions. It is the most common source of leaks.

Lifted flashing: Use a caulk gun with roofing sealant (NOT regular caulk — use a product rated for exterior roofing, such as Geocel 2300 or Henry 208R). Lift the flashing slightly, apply sealant under it, press back down, and drive a roofing nail to hold it. Cover the nail head with sealant.

Cracked or corroded flashing: Clean the surface with a wire brush and mineral spirits. Apply roofing cement liberally over the crack or corrosion. For a more durable repair, embed a piece of galvanized metal mesh in a layer of roofing cement, and apply a second coat over the mesh. This creates a reinforced patch.

Chimney flashing separation: Where the vertical flashing meets the chimney, a bed of mortar (or sealant) bonds them. When this joint opens, water runs directly into the wall cavity. Clean the joint, stuff backer rod foam into any large gaps, and seal with a polyurethane caulk (more flexible than roofing cement for this application).

Ice Dam Damage

In cold climates, ice dams form when heat from the living space melts snow on the roof, and the melt water refreezes at the cold eave. The resulting ice dam forces water under shingles.

Emergency response:

• Fill a tube sock with calcium chloride ice melt (not rock salt — it damages shingles). Lay the filled sock perpendicular across the ice dam, extending to the eave. The calcium chloride slowly melts a drainage channel through the dam.
• Do not chip ice off the roof with sharp tools — this damages shingles.
• Install a tarp over the ice-damaged area.

Long-term fix: Seal attic air leaks and increase attic insulation so the roof deck stays cold in winter.

Sealing Small Holes and Punctures

For holes smaller than 6 inches in diameter from impacts, branches, or equipment:

1. Clean the area around the hole of loose shingle material and debris.
2. Cut a piece of sheet metal (aluminum flashing stock, 26 gauge or heavier) 6 inches larger than the hole on all sides.
3. Apply roofing cement to the underside of the metal patch.
4. Slide the patch under the overlapping shingles above the hole and center it over the damage.
5. Nail the patch to the deck with roofing nails, spacing nails every 3-4 inches around the perimeter.
6. Cover all nail heads and the patch perimeter with roofing cement.
7. Reseal the overlapping shingles over the patch with roofing cement on their undersides.

This repair, done correctly, is often more durable than the original shingles.