Make your repair last prime the back and edges of the new siding.
Replace shed siding.
The heads will break the paper face allowing water to soak in and.
First remove the side trimming boards to unleash the rotten sections determine where the damage is and then mark the area with chalk that you can cut with the circular saw.
However if you leave this alone for too long the roof will leak and mold will start to grow.
Investigate using hold down anchors to make sure your shed stays put when the next fierce thunderstorm or worse blasts through your backyard.
Of my 8 x10 shed using 5 x16 square cut cedar shingles will be more expensive than other options.
Remember that siding is typically not rated for ground contact so make sure siding is not in contact with the ground.
Roofing nails through the nailing flange.
Lots of great answers above but the best one is to sheer off the siding above the rot line and replace the lower section with something that doesn t rot.
Pressured treated wood cedar corrugated metal or plastic a length of concrete siding and probably more.
A box of shingles at my lumber store covers 25sq ft.
However usually it is only a lower run of siding that is damaged.
Seal these joints.
To side the 304sq ft.
Cut the new t1 11 siding using a circular saw with attached woodcutting.
Measure an old piece of the t1 11 siding using a tape measure.
Space them about every 16 inches near the old nail holes.
Thoroughly paint all exposed edges and grooves.
Do not drive the nails flush or countersink them.
Transfer the measurements to a new piece.
To save material costs simply replace the rotted area.
You can use plenty of materials for that.
The rotted portions of the wood siding can be.
Install new siding slide the replacement piece up into place pushing up until the lower lip locks into the piece below it.
A few roof shingles.
Snap a string line 5 to 8 up the face for the bottom of the next row and continue each until done.
Place the piece of siding in its appropriate.
If the entire side of the shed is in rough shape you can replace the entire side.
While serious shed roof leaks are a major reason to replace your shed if only a handful of shingles are missing you or a handyman can nail them back in place.