We would always recommend having your aluminium guttering installed by professionals such as ourselves. Should you opt for supply only, the follow steps should guide you through the installation.
Checking the fascias
Most guttering systems are made to be easy to install, and even if you don’t have a lot of experience with home construction projects, you should still be able to install a guttering system on your own. We’re going to walk you through the process so that you don’t run into any problems, though.
You’ll want to start by checking the current guttering support to make sure it hasn’t rotted. Check both the fascia and the soffit to determine if the wood has rotted. If your house has a trim board or some crown moulding, then you will need to take that off in order to install the aluminium guttering. If you have bare wood you are connecting the gutters to, then that needs to be primed and painted before you attach anything to it.
You also need to measure your house to know exactly how much guttering you need for the project.
Preparing the Gutters
Once you know how long the gutters should be and everything is ready to attach them to the house, you can cut your gutters to the proper length. Tin snips work very well for cutting the aluminium, and you will need to cut both the front and back sides. Before you cut the bottom, be sure to bend the gutter to fit your house.
You should join all the sections while you have the gutter on the ground. It’s much safer that way than trying to assemble them on the roof. Lap all the seams from about 5-10 cm (to keep water from spilling out the seam) and then caulk them and rivet them to keep them together.
When cutting the gutters, try to leave the factory cut end on the outside, as that will be the most attractive one. At the end of each gutter, attach an end cap with screws, then use gutter sealant to seal the joints.
Introducing Outlets and Downspouts
Mark where you will put the downspout outlet on the gutter bottom. Make sure the outlet is centred and the flange side is facing down. You can make a V-shaped notch with a chisel to give your tinsnips a place to cut from.
Each downspout location needs downspout tubes. The downspouts all need to be screwed into the wall. They should have brackets as well to help keep them in place. Short sheet metal screws work perfectly for holding the downspout in place.
Hanging Your Gutters
You only need a small slope for your gutters. How many downspouts you use and how large they are will determine how quickly the gutters empty, so those who live in areas of heavy rainfall will need more and larger downspouts.
If you have level fascia boards, you can use them to determine how far to slope your gutters. You want to slope about half a centimetre for every third of a metre your gutters extend.
Place the brackets on the gutter and screw into the fascia board. Don’t screw the gutters directly into the boards, as that can cause leaking.
Add Flashing and Hangers
You need flashing on your gutters to protect the soffit and fascia from water damage. You can prevent water for running behind the gutters by inserting metal gutter apron flashing on the back side of the gutter and underneath the shingles. There are a few different ways you can do this based on what your specific needs are. The flashing can be inserted under the shingles or under both the roofing paper and shingles. If your hardware store doesn’t sell flashing that is already bent for you, then any aluminium siding contractor will be able to bend it for you to match your guttering specifications.
Once the gutters are installed in the fascia, then you can install gutter hangers as well. You need these about every 60 cm, and they will fit on the back edge of the guttering. If you already have flashing there, then just drive some screws though the flashing a guttering and into the fascia.