Probably one of the simplest shed roof designs out there this style of roof is commonly referred to as a lean to or skillion type of roof.
Shed roof extension.
It can be made by bending plywood over ribs or arch cut rafters.
Building a shed roof with trusses.
Looking at the existing roof will also give you an idea of timber sizes and how the members are connected.
The easiest to extend would be if the roof is a series of individual trusses at say 16 centres.
Skillion roofs are one of the simplest roof styles used in shed building.
Beyond the standard flat roof or single sloped roof the most common styles of shed roof are gable gambrel skillion and salt box.
It is often used to increase headroom without adding much height.
Metal roofs have a long life span due to the strength of the material itself.
Depending on where your shed is located the higher end can be fastened to the side of another building such as your house or garage.
A shed roof that is not stick framed will be built with trusses.
Saltbox roofs look like skillion roofs but with an extra short slope opposite the long angled plane like an upside down check mark.
Set center posts if the shed is 8 feet long or two intervening posts if it is longer.
A curved shed roof design offers a mix of the flat and gable roof style creating the curve or arch.
What is the roof structure.
I have found in all my years of building sheds that using pre built trusses is so much easier and simpler then building a shed roof with a ridge board especially if you are building your outdoor shed yourself.
All of them make a good choice for your garden shed.
Each of these styles has their advantage both in design and construction.
The gable style roof.
Sample of gambrel truss plans.
A well maintained metal roof system can last anywhere from 30 to 70 years depending on which material is used.
The first thing to do is to take a look at the roof of the shed.
Metal roofing systems are a great option for many pacific northwest area homes.
Another advantage that metal roofing offers is durability.
It typically has a single face that is higher on one end than the other.
Make a dirt floor lean to as the simplest addition to a shed.
Set 4 by 4 inch posts at each end of the shed and as far out as you want the lean to to extend.