When you have guttering, you need it to comply with all of the building regulations and rules to ensure that is both safe for you to have installed and that you don’t come into conflict with local authorities. To try and help with this, we’ve put together some information on the regulations for your guttering, including the more popular aluminium guttering, for you to understand how to stay within the laws.
Make sure that your gutter fulfils all the regulations
One of the most important things you should consider when it comes to your guttering is that it does, in fact, comply with any and all building regulations pertaining to the safe transportation of the water. The guttering itself collects the rainwater and then transports it along the pipework until it reaches the drainage system, where is then carried off to the sewer system. The regulations for guttering have been put in place to ensure that there are no chances of the water damaging the foundations around your property. You also usually do not need to apply for any kind of planning permission in order to carry out repair work on your guttering, unless it is a listed property.
Making sure that your guttering has the correct flow
As well as this, you will want to ensure that you get the gutter flow right, as so to ensure that it can both handle the amount of water that will fall and transport it efficiently. The rainfall in the UK is measured on the basis of litres per second per square metre, which is usually expressed as l/s/m2. The most commonly accepted figure for rainfall in the UK is a rate of 0.021l/s/m2.
In order to calculate the correct flow for your guttering system, you’ll need to work out exactly what the area of the roof you have is, as well as if it is a flat roof or one with a pitch, and if it is pitched, then what the actual pitch is. Finding the calculations for your effective roof area is done by dividing the vertical height of your roof by two, adding the width of the roof to that figure, and then finally multiplying by the length of your roof. This will give you the effective roof area in m2. In order to find the capacity you need for your gutter, you then need to multiply the effective roof area by the anticipated intensity of the rainfall for your area. This will give you a gutter flow rate in litres per second.
Overall, those are the primary criteria for making sure that your guttering is within the regulations for what is accepted. The guttering is designed to safely transport water into the sewage system and also protect you from damages to your property. If you’re ever unsure about what capacity your gutter needs, then consulting a professional is the best way to go if the mathematics isn’t something you’re especially good at or have time to do.