In the world of furniture manufacturing there is a company specializing in indoor furniture, outdoor furniture and between the two there is a limited amount of crossing. Outdoor furniture is built differently than indoor variants, and while you can always use outdoor furniture inside, the opposite is not always the case. If you are discussing moving some furniture outwards for a party or a much longer time, know what's going and should not be used, and what can be transferred to better manage the elements.
Be a material girl:
You do not have to be Madonna to find out that some materials are more suitable for outdoor use than others, depending on the type of furniture. Outdoor material must be robust enough to handle variant temperatures, some amount of moisture from rain, dew etc. and moisture.
Common sense dictates that there are some materials that should never be taken out unless you are completely confident that the weather will be perfect. For example, rugs are a disaster when it gets wet. It takes forever to dry, and can mold, and it will also be really stiff when it's cold. That's why carpets that are not intended for the outside should stay inside. Similarly, material such as suede, fleece and dry material should also not be removed. Companies manufacture pillows and deep seams that mimic the feeling of more luxurious materials, but are completely waterproof.
Then there are some parts that can go outdoors for limited periods before you need to worry. Wicker, for example, but technically reputable outdoor furniture, is not so strong and is much better in the sunroom and away from prolonged exposure to sun and rain. Then there are things like thin ceramics, ceramic and plastic parts that are waterproof but not suitable as furniture, outdoors or in. They are not strong enough to cope with extreme temperature changes or strong, bad weather. Untreated metal is also okay to get wet for short periods, but much longer than that and you risk rusting.
Then there are materials that are meant to be used as outdoor furniture. Outdoor material is particularly cordial but still looks visually appealing. Examples of tables, chairs, planters and more can be seen in the following way: treated wood and hardwood, galvanized metal, powder coated metal (aluminum, wrought iron, zinc hardware), stone and cement (such as tables, benches and umbrella stands), marble, clay and reinforced ceramics (like planted pots), polyurethane resin and waterproof nylon (used in sleeves and as pillows).
This list just begins to scratch the surface of the many materials that make up our lives. In conclusion, use your best assessment if something can go outdoors. Take into account weather patterns. If it's really nice, you can be more gentle about what you take out as a furniture. Outdoors can change quickly, but keep an eye out.
Treatment of wood
The best thing you can reuse for use as indoor furniture / outdoor furniture is wood. It's no more difficult than adding some lacquer and it can save you from unnecessarily buying all the new furniture. First of all, take a look at the wood you are working with. Stay away from old wood that is in poor condition, as it will deteriorate at an even faster pace when you have gone outside. Then check what woods you have. Some of the naturally stronger forests, such as teak, pine trees, cedar trees and cypress, are good on the outside. These forests are already strong and durable on their own and require some extra protection. More sensitive forests will require extra sealants and even then they will probably not be as long as hardwoods.
To start the weatherproofing process, you must cover wood with a bleach resistant UV-resistant finish. Sanda away any paint already on your furniture. No matter what finish it's on, it's probably intended for the inside, and while it gives furniture a high gloss gloss, it's not the right kind of lacquer that protects it from moisture and outdoor elements. After the surface is even, even and clean, apply a sealant, usually an oil-based lacquer, unless you work with a wood that produces your own oils, such as teak and cedar furniture. Outdoor atmospheric elements will wipe out wood faster than indoor furniture, so it's important to protect the surface and the heart from cracking, ripping and twisting. When done, you're welcome to go. From then on, simply oil and clean your wood furniture once more twice a year to keep it fresh.