The guidance also contains a comment that ‘Open slatted balcony decking should drain away from the dwelling’. This is open to interpretation.

Please note: the performance is based on 150ppm of Hardness, these values can change please contact us directly with a copy of your water analysis to ensure this softener can be sized correctly

Free draining balconies are the lowest in cost. The addition of a drip tray typically adds around 10%. Incorporating positive drainage to a Rain Water Pipe (RWP) typically adds a further 25% and also makes the construction significantly more complex.

Once the resin beads in the softener become saturated with calcium and magnesium ions, they must be regenerated by adding sodium chloride (Water Softening salt). The sodium ions replace the calcium and magnesium ions on the beads. Sodium chloride is cheap and widely available, making this a convenient and cost-effective system.

Some residents like to think of a balcony as a covered storage space where items do not get too wet. Other residents like to think of a balcony as an outdoor garden where they can grow plants, and rainwater is welcomed.

Explore why drainage on balconies matter. Different balcony structures have different drainage requirements. Concrete balconies, for example, tend to be...

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D9 states that ‘balconies shall have adequate rainwater disposal to a suitable outfall’. It does not go into detail of what constitutes a suitable outfall. It then speaks of the ‘cumulative effect of water discharging from multiple balconies in vertical alignment’. This clearly indicates that NHBC expect that in some cases water will be discharged into the open, not into a RWP.

D focuses on balcony drainage and shows 3 typical sections. However, these are all concrete balconies with upstands which could trap water and form a pond, which is not relevant for metal balconies. None of the sections address how metal balconies should be drained. An NHBC publication in February 2010 explains that the drawings show concrete as ‘these are potentially more difficult to meet with the principles, rather than freestanding balcony structures (typically constructed from steel)’. This infers that requirements for metal balconies are less onerous as there is less risk of water penetration, but no detail is given.

Pressure Reducing Valves are designed to reduce incoming water or steam pressure to a safer constant predetermined downstream level.

In clauses such as 7.1D8, the guidance makes a distinction of ‘balconies functioning as roofs’. By inference, balconies not functioning as roofs do not have the same requirements, but this is not clearly stated.

If you have any questions about our return policy, please contact us before purchase. This will also help to ensure you purchase the correct product that suits your requirements.

A stack of balconies can be considered somewhat like a tree. When it starts to rain, the balconies (like leaves and branches) trap and collect water so you would get less wet standing underneath than you would when standing in the open. However, if rain persists, water will start to drip in some places, not a very even pattern. After the rain has stopped, water will continue to drip for a while, as it does from a tree.

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Have you got Hard Water??? Installing a Filter Systems Australia water softener will remove limescale and eliminate those hard water stains leaving you with soft water saving you time and money.

Twin alternating softeners are ideal for situations where uninterrupted flow of soft water is a must. One resin tank is always in service, while the other tank is in standby. When the meter determines that the resin is near its capacity, it will switch the tank in standby to be in service, and the tank containing the exhausted resin will begin regeneration and wait in standby until the other tank is ready for regeneration.

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Balcony drainage is important to prevent an accumulation of water which can be unsanitary and cause structural damage. Our Cassette® balconies are drained with the use of soffits with the choice of positive, free or controlled drainage.

Approved Document H3 does not clearly state whether balconies are considered to be part of ‘the roof’, so this question is therefore down to individual interpretation. Different clients and different Building Control inspectors have their own views on what is required to comply with the regulation.

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NHBC guidance documents contain section 7.1 which is entitled ‘Flat roofs and balconies’. This guidance is a bit more specific than the Approved Document, as it uses the word balcony in several places, but it is still open to different interpretations.

Describes ‘Eaves Drop Systems’ where water is dripped from an edge, subject to certain considerations which are listed, primarily the need to protect persons using doorways below, and the need to protect the fabric of the building from water ingress.

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Due to the nature of the products we sell, a strict return policy is in place. We work with food grade certified materials that must be un-opened and un-used as to be able to be re-sold.

Has a table showing that roof areas under 6m2 do not require drainage, whereas larger roof areas do. This is interpreted by some to mean that balconies over 6m2 require drainage to an outlet. Others interpret this as applying only to roofs, not to projecting balconies.

Taking water from projecting balconies back inside the building envelope to a RWP generates the risk of water ingress if anything goes wrong or gets blocked. Some clients believe drainage to a drip edge is therefore a more satisfactory long term solution than draining to a RWP.

The calcium and magnesium ions are left attached to the beads, while the water leaving the water softener contains more sodium ions. The hard water is softened because it no longer contains calcium or magnesium ions.

Grooved decking boards are commonly used as a surface. Experience has shown that the majority of rainwater falling on a decking board will run along the grooves and drip off the end of the board. For this reason it is generally better to run decking parallel with the building line, otherwise there can be a substantial amount of water dripping of adjacent to the façade, giving an increased risk of staining or water penetration.

What is hard water? Hardness is a measurement of calcium and magnesium in water and this can cause staining, calcification and may damage appliances, hot water systems, pipes and fittings over time if not properly addressed. Removing hardness from the water will greatly improve the quality of the water and its effects include lower surface tension, better effects from soaps and detergents, healthier hair and skin, longer lasting appliances (such as kettles, dishwasher, hot water cylinder etc.) and fixtures, less scale build up in showers.

Glide-On Balconies use soffits for drainage. Soffit boards are fitted to the underside of the fascia to complete the clean-edged...

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With free draining balconies, there is a risk of hot liquids being spilt on a balcony and falling through gaps onto residents below. A drip tray reduces this risk by draining water to the edge of the balcony. A RWP eliminates the risk altogether.

Softeners are full of cation exchange resin. The resin beads have sodium ions attached to them. As the hard water passes through the resin bed, the calcium and magnesium ions swap places with the sodium ions.

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Please note: these systems have been based on treated mains water, if you wish to treat bore water please contact us before purchasing to ensure this system is suitable for your needs.

According to the NHBC “Pitched Roof” guidance, section 7.2.22 states drainage should be provided on balconies where the area is 6m2 or over. However, the guidance also states that consideration should be given to providing drainage to smaller balconies.

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Every situation will be different, but with free draining balconies, there is an increased risk that water will track along the support arms and run down the façade, giving a greater likelihood of staining. Positive drainage is likely to reduce this risk.

D15 says ‘Roofs greater than 6m2 in area should be provided with rainwater gutters and downpipes’. It does not mention balconies.

Free draining balconies tend to look quite industrial, as the structure and decking are usually visible when looking up at the building. The addition of a soffit/drip tray greatly enhances the appearance. The addition of a RWP is typically a visual detriment, unless it can be incorporated within the façade, which adds complexity. Also, balconies draining to a RWP need to be significantly deeper to accommodate the pipework, which makes them look more chunky.

If there are no balconies, rainwater falls directly to the ground, or runs down the façade. Adding free draining projecting balconies to a building does not increase the amount of rain which reaches the ground.