There is a nor'Easter coming today. What's a quick fix? My first home and just closed a few days ago! Help please.
The hole is 8 inches in diameter or so.
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I would procure a sheet of aluminum or steel (available at home improvement and hardware stores), fold a suitable hem at the bottom, and slide it up behind both courses of siding (above and below the holes). Friction will probably keep it in place for the short term, but you could dab some silicone behind to lock it in.
| |<-- upper siding course | | __ | ||| | |__||| |<-- lower siding course || | ||x | ||x | <-- hole location ||x | || | ||__|| |____|<-- hemmed sheet
If you fit this well and paint it it could actually be a finished repair. Insulate behind first. Keep in mind that the top edge of the sheet will be exposed in the siding gap above, so you might seal that with caulk or lap another sheet all the way up to and behind the course above.
I would use a pice of plastic like from a binder and slip it up under the upper shingle and tape it for a temporary quick fix. I would not use a towel as any moisture that gets on the towel will be wicked inside. If you don’t have a binder or a thin piece of plastic , cover a piece of card board with a trash bag and slip it under the upper shingle. These are both quick fixes that should act like a shingle until you can replace that one. Not trying to scare you but is that asbestos shingles? If a newer home mid 70’s or newer it may be a cement type product it did not look like wood to me.
For the smaller holes you could buy a piece of PVC and stick it in there and then glue a cap to it. Then exterior caulk and you're done. This way, if you need the holes afterward, you just cut the caulk back and pull the pipe out. They look small enough you might be able to make do with one of the 2' sections they sell at your local hardware store.
The larger hole could be temporarily covered with 6 mil plastic. I wouldn't try a trash bag against strong winds. 6 mil plastic sheeting is fairly easy to find in most areas.
I would clean the surface and just use enough powertape (the silver one that's 5cm/2in wide) to cover the holes. That should withstand the wind and percipation if you get a quality one. At the same time, insulate from heat losses from the inside by any clothy material (if heat sinking could be an issue e.g. because of beds or office desks close to the hole on the inside.