In order to avoid an increasing risk of flooding elsewhere, it is best to insulate them on permeable soils or to make them from permeable materials. Permeable materials include both porous materials (z.B in the form of grass or reinforced gravel, porous concrete or porous asphalt) and permeable materials (e.g. B clay bricks or concrete blocks designed for water to pass through joints or cavities). This will not only minimize the impact on the environment, but also avoid the cost of drainage. You may need to increase the size of your rainwater gutters and pipes or add new rainwater pipes. Information on gutter sizing and rainwater pipes can be found in the approved H holder. If you intend to build a public channel or find yourself nearby, you need a written agreement from your wastewater water supply, so you should consult with the company during the first planning phase of your work. The normal way to do this is to extend the piping (known as the ventard) outwards, so that the end is open (but protected by a net to prevent birds). To prevent odours from entering a building, the open end of the ventilation hose must be extended by at least three metres to the side or up to 0.9 m above an opening in a building. Normally, we do not allow structures to be built above or near the water line. If you find one, it is important to contact us to discuss next steps on 0800 9172652.
Hardstandings surface water must not flow on the highway, where it can cause accidents or nuisance. The pipes must be sized for the flow of water to minimize the risk of obstruction and allow air movements. Advice on pipeline sizes is provided in the approved document H. Sanitary pipes must be ventilated to prevent air from escaping from the pipes and sewers in the building. The flow path should avoid obstacles (for example. B ponds or outbuildings) and keep them away from the foundations, so it has to be longer and have additional access rooms instead of running in a straight line. The approved H document provides guidance on the additional measures required when exits are to be near the foundations. Therefore, you need to tell us if you are planning to expand your home so that we can make sure that your home and our pipes are protected during and after construction. There are two drainage systems you need to think about: fault and surface water. In general, these two systems must be maintained separately. Flow covers indicate exits.
By lifting the lid, it may be possible to see the direction, size and depth of the pipes, but not enter the chamber (which can be filled with toxic gas) and ensure that the cover is replaced safely. It is strongly recommended to advise yourself before the engagement or to start with a contractor, an architect, a drainage engineer or the local building control department. If it is not practical to use infiltration (for example. B for nearby foundations, waterproof or contaminated soil or a high water table), it is preferable to transport them to a stream or, if not, to a surface water channel or, as a last resort, to a combined sewer. Surface water should not be discharged into a draining sewer or sewer. A larger roof area increases the amount of surface water. It is best to maintain the additional volume on site to avoid an increasing risk of flooding elsewhere. Rainwater can be kept on site using a moving type or other means to soak it in the soil (called infiltration), or be stored and used for flushing toilets or garden irrigation (known as rainwater harvesting).
Approved H provides advice on where soakaways are set up, their size and how they should be built. If you are expanding your land, you need to make sure you know if there are any