What is a lean-to roof?
A lean-to roof is nothing more than a simple, sloping roof added to a building where the upper edge of the rafters ‘lean’ against a wall or building. It is one of the most common roofs found in India and is generally regarded as the cheapest alternative for covering structure. Other types of roofs include flat roofs and gable roofs.
The traditional, ethnic lean-to structures are mostly made of logs or unfinished wood. They originated in Finland and were used as temporary shelters while camping or fishing, but this pioneering design has made its way down south into the hearts and homes of countless Indians due to its simple, workable structure, low installation cost, and the incredible protection they provide against the unwavering rainy climate.
This roof can be used for constructing sheds, simple extensions, carports, verandas, etc. Lean-to roofs are also used in storage building when any storage building will require additional space than the lean to roof is constructed with existing wall.
Construction of a lean-to roof is easy and inexpensive. Due to the slope of the roof, water and snow easily run off and reduces, otherwise necessary extra waterproofing. Hence this roof is best for constructing in high rainfall and snowfall regions. This may be done either as a part of the original construction or even after execution after some year. Adding a lean-to roof to your home or shed is an easy, do-it-yourself project that only requires an extra pair of hands to help. However, if you do require professional help, there are plenty of roofing experts here on homify.
Which type of materials can I use for my lean-to conservatory roof?
The typical roofs in India consist of an aluminum eaves structure, which is fitted to the frames of the building and acts as a support for the roof. Unlike the traditional lean-to roof, it’s more common to have a conservatory roof that is transparent. These roofs are comprised of aluminum eaves that provide support for the roof, along with glazed bars that are fitted in between the eaves to complete the structure. Glass and polycarbonate roofs are the most popular design options, each one with its own perks.
Polycarbonate Conservatory Roofs: It’s a low-cost plastic roof material that not only offers great insulation qualities but is also lightweight yet strong. Available in various thicknesses (from 16-35mm), tints and sheet sizes. As the material distorts the sunlight, it lacks the clarity of glass and does not have the same soundproofing qualities.
Polycarbonate also has a tendency to get dirty much quicker than glass, and can develop a green sludge between the panels; this means the roof is likely to need cleaning once or twice per year. If you intend to use your conservatory regularly, polycarbonate may not be the best choice as it will cost more to heat, it will not reduce outside noise, and it will require more regular maintenance. If it is to be an occasional room or one used for plants and gardening, polycarbonate may be a better option as it is cheaper to buy and to install.
Glass Conservatory Roofs: Glass roofs are generally the more popular choice for conservatories, as despite being more expensive than polycarbonate, they offer a variety of benefits. One of the key advantages to a glass roof is the clarity; this allows more light into the room. They also tend to have better-insulating properties and with the development of specialist glass, can actively control the amount of heat and light which can enter the conservatory. It also has better soundproofing qualities than polycarbonate, and there are some specialist double glazing products on the market with improved soundproofing properties. This might be necessary if you live near a busy road, or wish to keep outside noise to a minimum. Glazing units can be fitted with most types of frame, whether you choose uPVC or wood, and for a conservatory that will be in regular use throughout the year, glass is probably the best option.
How to build my own lean-to roof?
Firstly, be sure to check with the local building authorities in India for the code requirements in your area. Get any permit you might need and be prepared for property setbacks with storage buildings.
Secondly, locate underground hazards. Most lean-tos will require some digging, whether for a concrete foundation, pier blocks, or post-holes. Always call a utility location service before you break soil. Digging into a pipe or electric line could cause serious injury or property damage.
Next, draw up the project plan. Measure your structure and get your dimensions, and figure out where your lean-to will attach to your building. Angle the roof so that it can withstand the weather and direct rain away from your property. Many people add gutters or downspout drainage pipes to prevent pooling at the base of the roof.
Afterward, decide on a solid foundation and on the materials you want to use for the roof. Coordinate your new roof to match the style of your home or shed where it will attach. Think about how you plan on using your conservatory–consider your climate and how much you plan on being there during the day, and how much sunlight you want. Finally, calculate the amount of the materials and if they’re within budget, purchase them.
Last but not least, calculate the amount of each material you will need, price them, and purchase them.
Procedure to assemble the Lean-to roof
-Mark the area where you want the structure.
-Measure 8 feet from the existing structure towards the outer direction and dig a deep hole to drive the post in.
-Drive the post in and fill the hole with concrete to set it in place.
-From this existing post, measure 3 feet distance in the same line, dig a hole and drive the second post in. Do the same for the third and fourth post, while maintaining the same distance as before between the posts.
-Cut out a notch on the top of your posts (as shown in the image above). This is where the supporting post will rest.
-Next, place the supporting posts into the notches.
-Once this structure is ready, attach the metal purlins on the outward side of the installed posts. This needs to be done with the help of nails so that it is secured firmly in place.
Next, fasten the nailer on the side of your existing structure.
-Make use of good quality screws to drill in the nailer. You will be attaching the upper end of your rafters on this.
-Attach two planks on either end of the nailer by nailing them firmly in, and place them on top of the structure. Add a third plank in the center.
-Once this is done, set the roofing material by attaching wooden planks at regular intervals on top of the roof as done before.
-Next, measure out a choice of your roofing material and place it over the base roof structure. Screw it in with a drill and nails.
-For the final step, install the trim of your choice as a cover against the side structure. Screw it in with a drill and nails.