To build a safe and attractive decking balustrade, safety, fixing, and aesthetics must be planned as a whole. The railing should serve as fall protection, be securely anchored to the patio’s supporting structure, and at the same time complement the style of the house and the patio.
Start by assessing the risk of falls and how the deck will be used. Then you can choose the type of railing, material, and design, and plan the placement of the posts so that fixings are located in load-bearing sections beneath the decking.
Why should you plan your deck balustrade before laying the decking?
The deck balustrade should be planned before the decking is laid, since posts need to be anchored to load-bearing components beneath the decking. If you know roughly where posts and fixings will be placed from the start, the deck’s framework can be adapted to accommodate the railing instead of having to be reinforced afterward.
The design can be planned to accommodate the railing
If you decide on the type of railing and the approximate locations of the posts before installing the decking, you can plan the mounting points at the same time as the deck’s load-bearing structure is being built.
- Posts can be placed according to the railing's layout.
- Load-bearing material can be provided where the fixings are needed.
- The deck can be completed once the base for the railing has been prepared.
The balustrade must be adapted to the structure
If you wait until the deck is finished, the placement of the posts will need to be adjusted to accommodate the load-bearing elements already in place beneath the decking.
- There may not be a joist where the post needs to go.
- The post position may need to be adjusted.
- Noggins or other reinforcements may need to be added afterwards.
When planning a deck railing, it is therefore a good idea to decide on the railing's design and approximate layout before the supporting structure and decking are completed.
Make sure the railing is included in the design
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Determine the type of railing and its layout
Plan the corners, ends, and approximate post locations so you know where the balustrade needs to be anchored.
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Check the load-bearing structure
Make sure there is suitable load-bearing material at the planned fixing points and follow the balustrade system’s installation instructions.
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Complete the decking once the supporting structure is ready
Once the mounting points have been planned, the decking can be installed without having to resolve the balustrade fixings afterwards.
The railing is part of the deck's initial design. It's easier to prepare the proper foundation from the start than to modify the load-bearing structure once the decking is already in place.
What should be the height of a decking balustrade?
There is no single railing height that can be used universally in all situations. The required height depends, among other things, on drop height, how the deck is used, and the regulations that apply where the railing is to be installed.
Drop height and intended use affect the need for protection
The greater the potential consequences of a fall, the more important the railing’s function as fall protection becomes. The way the area is used and the types of people who may be present there must also be taken into account when designing the railing.
Check the applicable height requirements for the site
balustrade height, and design requirements may vary depending on where the deck is located and the type of building or environment involved. Therefore, always check the current guidelines before the railing is sized or ordered.
Do not choose a railing height based solely on a general standard measurement. Assess the risk of falling and the conditions of the balcony, and check what requirements apply at the specific location with your municipality or the relevant authority.
Is it better to build your own deck balustrade or buy a ready-made system?
It depends on your priorities. A custom-built timber railing offers a great deal of flexibility and may have lower material costs initially, while a ready-made balustrade system often simplifies installation and requires less ongoing maintenance.
| Property | Build your own timber balustrade | Complete system |
|---|---|---|
| Time | More steps for cutting, adjusting, and assembly | Pre-assembled parts can speed up assembly |
| Tools | Saw, drill, spirit level and screwdriver | Usually fewer fabrication steps and specialist tools |
| Maintenance | Periodic surface treatment depending on the type of wood and exposure | Primarily cleaning and inspecting the railing components |
| Service life | Is greatly influenced by the type of wood, construction, and maintenance | Affected by materials, environment, construction, and maintenance |
| Design | Great flexibility in customising dimensions and styles | Standardised proportions and a consistent system design |
| Cost of materials | May be lower at the start | Typically higher purchase cost |
| Cost over time | Maintenance and personal work time need to be taken into account | Higher purchase costs may be offset by lower ongoing maintenance costs |
You want plenty of freedom to customise the design and do more of the work yourself.
You prioritise simpler installation, consistent proportions and less ongoing maintenance.
Which material is best for a deck balustrade?
It depends on your priorities. Wood offers great freedom and a natural look; aluminium requires little ongoing maintenance; and glass is a good choice when you want to preserve the view while still having a solid railing surface.
Wood
Natural and easy to customiseWood pairs naturally with timber decking and offers great flexibility when the railing is built on site. Pressure-treated wood and heartwood pine are common materials for outdoor use, but the wood surface requires maintenance when exposed to the elements.
Posts slats s can also shift, warp, and change as the wood ages. The choice of materials, construction, and surface treatment therefore affect how the railing changes over time.
Aluminium
Retains its shape and is easy to care forAluminium retains its shape well and requires little ongoing maintenance. The profiles can be made slender, giving the railing a lighter and more refined appearance than many wooden structures.
A " powder-coated " finish provides a durable surface layer and allows you to choose a colour that complements, for example, the facade, windows, and other details of the house.
Glass
Unobstructed view and solid railing surfaceGlass is used as a infill when the view needs to be preserved. The solid surface can also reduce wind passing through the railing without visually enclosing the deck in the same way that a solid, opaque infill would.
When the glass is part of a fall protection, the type of glass must be selected based on the specific railing design and location. Laminated glass holds the pane together if the glass breaks.
Aluminium + glass
This combination results in sleek profiles, an unobstructed view, and a railing that requires little ongoing maintenance. It’s particularly well-suited when you want the railing to take up minimal visual space around the deck.
Are vertical or horizontal slats better for a deck balustrade?
Vertical slats are easier to design so that the railing prevents climbing, since they do not form natural footholds. Horizontal slats can provide a distinctly horizontal appearance, but require special consideration in areas where young children may be present.
Easier to design for areas used by young children
Vertical slats does not create any horizontal footholds. This makes it easier to design the lower part of the railing so that it prevents climbing.
The openings must be designed so that younger children cannot squeeze through the railing. Check the applicable dimensions and requirements for the specific location.
Be especially mindful of the risk of climbing
Horizontal slats create a distinct horizontal look, but can also serve as a step. In areas where young children are present, the lower part of the railing must therefore be designed so that it is not easy to climb on.
The part of the railing that is intended to prevent climbing should be designed without easily accessible footholds. Specific design requirements may vary depending on where the railing is to be installed.
In that case, the part of the railing designed to prevent climbing must be constructed without easily accessible footholds. One option is a solid lower section or vertical slats in the protected zone, with a horizontal design higher up. Check the current guidelines with your municipality or the relevant authority.
How much should you budget for a decking balustrade?
There is no one-size-fits-all percentage that applies to all decks. Instead, include the railing as a separate budget item from the start, since the cost depends on the type of railing, the materials, the total length, and the specific installation requirements fixing.
Four things to keep in mind from the start
- Railing Type
- A homemade timber railing and a ready-made balustrade system involve different material costs and different amounts of work.
- Materials
- Wood, aluminium, and glass differ both in purchase cost and in the amount of ongoing maintenance they require.
- Length and design
- The total length of the railing, as well as the corners and ends, determine how much material and how many parts are needed.
- Fixing
- The conditions of the deck’s load-bearing structure determine whether fixing can be installed directly or whether the substrate needs to be reinforced first.
If you include the railing in your budget right from the planning stage, you'll reduce the risk of having to change the materials, design, or construction once the rest of the deck has already been built.
How do you design a deck balustrade where young children spend time?
In areas where young children may be present, the railing must be designed to reduce the risk of climbing, falling through openings, and the head or foot getting caught. Exact dimensions and requirements may vary depending on where the railing will be installed, so check the applicable guidelines before finalising the design.
- 01 climbing
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Prevent climbing
The railing should not provide an easy way for the child to climb up
Horizontal rails, slats, and other components that provide a secure foothold can make the railing easier to climb. The design therefore needs to be carefully evaluated in areas where young children may be present.
- 02 openings
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Prevent falling through
The openings should not be easy to get through
The spacing between the slats, rails, and other parts must be designed so that young children cannot squeeze through the railing. Check the applicable opening dimensions for the specific location.
- 03 get stuck
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Prevent a child’s head from becoming trapped
The size and shape of the openings need to be assessed
Some openings may pose a risk of a child getting their head stuck. Therefore, assess the size, direction, and location of the openings when designing the railing.
- 04 bottom edge
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Check the gap
The bottom edge of the balustrade also needs to be designed safely
The gap between the railing and the surface must be assessed based on the design and the risk that a child could get stuck or squeeze through the opening.
Specific requirements for openings and clearances may vary depending on the location and type of structure.
Make sure the railing is designed to prevent young children from climbing over it, falling through it, getting their heads stuck, or getting caught on the bottom edge of the railing. Check the current guidelines from your municipality or the relevant authority.
How do you install a deck balustrade?
Start by measuring the entire length of the railing and checking where the load-bearing structure is located beneath the deck. Then place posts, secure fixing, and install the infill and top rail before performing a final inspection of the entire railing.
Check every part of the assembly
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Measure the entire length of the railing
Measure the total length and mark the corners, ends, and any openings before determining the post locations.
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Place the corners and endpoints first
Start with the corners and ends. Then distribute the remaining posts along the length according to the railing system's dimensions and specifications.
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Check where the load-bearing parts are located
Check where the joists, support beams, edge beams, or other load-bearing components are located beneath the decking before finalising the post positions.
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Attach posts to the load-bearing structure
The fixing must be anchored to a load-bearing component and not just to the decking board. Follow the railing system’s assembly instructions and choose the fixing according to on the substrate.
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Install the infill
Install glass, slats, or other infill once posts is properly positioned. At the same time, check the openings, clearances, and that all parts are installed according to assembly instructions.
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Install the top rail
Fit the top rail once the posts and infill are in place, and check that the joints and connections are properly installed.
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Check the complete balustrade
Check the posts, fixings, infill, joints and top rail. The railing should feel stable, and all parts should be securely in place before installation is complete.
Check the supporting structure before locking the posts into place. It is much easier to adjust the position of a post before fixing than once the rest of the railing has already been installed.
Which railing is right for your deck?
glass balustrade e is a good choice when you want to preserve the view, aluminium when you prioritize an easy-to-maintain railing, and wood when you want plenty of freedom to build and customize the look yourself. Then compare the options based on the balcony’s dimensions, fixing, and other factors.
What should you know before building a deck balustrade?
When building decking balustrade, it is especially important to know when fall protection is required, how the railing should be anchored, what dimensional and design requirements apply, and how materials and post spacing affect the structure. Here are brief answers to some common questions that supplement the guide.
Do all decks need railings?
No, not necessarily. Whether a railing or other fall protection is required depends, among other things, on drop height, how the deck is used, and what requirements apply at the specific location. Therefore, always check the current guidelines before building.
Can I install a deck balustrade after the decking has been laid?
Yes, but you’ll first need to check where the load-bearing structure is located beneath the deck. If a post ends up in a spot where there isn’t a suitable foundation, the post position may need to be moved or the structure reinforced before the railing is installed.
How far apart should the posts be in a decking balustrade?
There is no single post spacing that fits all situations decking balustrades. The spacing depends on balustrade system, the material, the infill, fixing, and the specific conditions of the structure. Therefore, follow the railing system’s design specifications and assembly instructions rather than relying on a general standard measurement.
Which type of glass should I choose for a deck balustrade?
The type of glass should be selected based on the railing’s design and location. Laminated safety glass is particularly relevant when the glass is intended to help prevent falls through the railing, since the lamination holds the glass pane together if it breaks.
Does a decking balustrade require a building permit or other authorization?
Requirements for building permits or other approvals may vary depending on the deck’s height, location, design, and the regulations that apply where you are building. Therefore, check the current guidelines for the specific location before beginning work.
Can a glass balustrade also reduce the wind on the deck?
Yes, a solid glass surface prevents air from passing through the railing itself and can therefore reduce the wind near the edge of the balcony. At the same time, the extent of the windbreak you experience depends on the height and placement of the railing, as well as how the wind moves around the house and the deck.
