When you hang your gutter system, the downspouts are attached to the gutters with special attachment pieces, but they are not strong enough to support the downspouts for long or once there is liquid in the system. As a result, it is necessary to attach the downspout pieces to the side of the house. There are several different methods commonly used to attach downspouts and you need to consider the type of façade that is on your home carefully when choosing that method. Brick, stucco, vinyl siding, and wood siding all need different types of anchors and attachments.
The most common way to attach downspouts is with screws and what is called a gutter clamp. There is a piece that fits around the downspout and has two wings that point out. There are holes in those wings where screws can be put in and secured to the house. When using this type of attachment, you need to consider the material of the house so that you choose the right type of screws, anchors, and drill bits. If you have siding, the best thing to do is find the studs and screw directly through the siding into those studs. The small holes you make in the siding can be plugged with silicone sealer so that water or insects do not find their way behind your siding. If your house has a stucco façade or is brick then you will need to use masonry bits to pre-drill holes first. Then you will need to install anchors into the holes to receive the screws. Anchors are pieces that drill into a small hole and then expand to provide a stable place for a screw to embed in.
Depending on how far out your gutter system is, you may find that the downspouts do not run close to the side of the house. In this case, you have two choices. You could use some elbows to turn the downspouts close to the house and install clamps as stated above. Alternatively, you can first install spacers and attach the downspouts to those spacers. First, attach some wood pieces to the side of the house with anchoring screws and then use them as the base to attach the gutter clamps. You will have to measure the space between the house and the downspouts carefully to make sure that your spacers fit exactly. If the downspouts are installed at an angle, those stresses could cause the system to come apart at a seam.
Although, gutter clamps are most common. They are not the only way to secure your downspouts to the house. Other methods actually employ different styles of downspouts. Instead of the rectangular pieces of gutter style tubes, you can use rain chains or rain cups instead. These systems start with a cone shaped cup directly under the gutter system. The water flows into the funnel shaped container and with the chains in runs down a length of chain to the ground. The adhesion properties of water allow the running water to stay adhered to the chain rather than running out all over the place. A similar setup has a series of small cups attached to each other with small lengths of chain. This type of system is better if you have a larger volume of water. The chain and cups systems of downspouts often make gutter cleaning harder because it is easier for the one cup at the top with a small opening to get clogged.