Firstly, a tip on how to get the most accurate quotes for your new staircase.
There are dozens and dozens of staircase builders in Australian cities and it can be very difficult to assess one quotation from another because of the jargon associated with the industry. To complicate things even more, some stairbuilders use different terminology for some components than others. All very confusing.
The best way to ensure that all companies quoting on your stair are quoting equally is to have a clear picture in your mind of what you want in the first place. You can do this by approaching a stair company with a comprehensive showroom and making your selections from their range and setting that as the benchmark.
When choosing companies to quote the stair there are a few things to remember.
· As a rule the first contact you make with a company will be indicative of the company in general. If they seem disinterested they probably are. If they have no showroom they're probably not serious about their business. If they don't present well on site at the first consultation, it's probably indicative of their approach to their product, so beware.
· A written quotation is essential. It needs to spell out exactly what the stair proposal entails, such as material sizes, details of all the components, types of material used, lead times and terms and conditions.
· Is the stair guaranteed? It should be for a minimum of seven years. Ask!
· If you are an independent owner builder or similar and the stair is valued at more than $5000.00 the stairbuilder must be a registered builder or else they are operating illegally and they will not be insured. It is vital that you ask the question otherwise you will be exposed to potentially damaging litigation.
Headroom
Headroom is a constant problem in staircase design. More often than not headroom problems on a staircase are the result of a lack of understanding of staircase design in general.
For instance: When the staircase is drawn at say 1:100 scale on the first floor plan, the headroom on the stair is often deemed to be acceptable by the designer by counting down from the top of the stair the number of risers to the point where the stair disappears under the floor. Say this occurs on the third riser and the stair has a total of 16 risers. The designer then calculates 13x the estimated riser height of the stair. This is incorrect. The calculation should be 12x the estimated riser height of the stair because the stair is only 12 risers down at that point.
Other common problems when calculating headroom are, forgetting to allow for the depth of ceiling. In other words the designer calculates that the headroom beam crosses the stair at no 3 riser, the estimated riser height is 180 making the height at no 3 riser 540mm, the floor to floor height is 2750, therefore by deducting 540 from 2750 the headroom height is 2210. That's fine, except there's no allowance for the depth of ceiling. So then deduct another 275 for the ceiling depth and all of a sudden there's a problem.
There are other common mistakes made when calculating headroom but we can't list them all. If in doubt call one of our consultants. Make sure you get it right first time.
By the way, minimum headroom is 2000mm. It's not listed under the staircase regs believe it or not. It's listed under the section dealing with ceiling heights.
We know that every square metre of space in a house is very valuable and some designers like to allocate as much space as possible to living areas, but our experience tells us that customers can be greatly disappointed by a staircase that is stingy in width.
Stairs are probably the most used thoroughfare in any two-story home and mothers in particular use them all day, going between the children's bedrooms upstairs and the utilities areas on the ground floor. Width becomes an issue particularly where winder steps are involved and all winder steps seem steeper as the stair gets narrower. This even applies to our Stepsure system. Unfortunately traditional winder steps also become unusable the wider the stair gets because the steps become too big and the walking line becomes uncomfortably large. This is not the case with Stepsure winders, they remain the same regardless of the width and always with greater comfort.
We recommend a minimum width of 900 mm for domestic stairs and wider if possible.
Remember when drawing a stair on plan, if you specify the stairwell width to be 900 mm the stair will be up to 100 mm less than that in clear width. This is because other stair components such as newel posts, handrails and cappings encroach on that clear space.
Again our consultants are always available should you require assistance in this area.
Please remember that a low riser height or a wide step on their own do not automatically make for a comfortable walking stair. The combination of the riser height and going (width of step from nosing to nosing) is what counts.
If for instance you have a 160 mm riser height and a 240 mm going, the stair would be almost un-walkable. On the other hand if you have a 160 rise and a 280 going then the stair would walk beautifully. So it's all about ratios and combinations. A rise of 190 combined with a going of 240 whilst quite steep, is safe and comfortable to walk on. A stair with a 280 going and a 190 rise is not.
When specifying stair components such as newel posts for instance, don't expect the posts that have been specified at '100mm x 100mm turned' to be finished that size. 100mm x 100mm is a sawn size. That means that when the manufacturer buys the material in a raw state it is approximately that size, but after being machined or dressed will be reduced by up to 10%. So a 100 x 100 post will end up being 90 x 90.
This should be specified in the stairbuilders quote, but even if they nominate finished sizes some tolerance should be allowed for.
It is important to keep in mind that when ordering a stair or anything made of timber, that timber is a natural material and the colour does vary. Total colour match will never be achieved. An attempt should be made by the manufacturer to minimise colour discrepancy and total mismatch, but sometimes this is very difficult. So colour differences are a part of the nature of timber, the same as differences in grain patterns and should be admired as a part of the character of the overall product.
Balustrading and handrail heights are set minimums in the Building Code of Australia and therefore must be adhered to. It is important to note that when specifying these heights on plans that finished floor surfaces including carpet be taken into account. The stair manufacturer should be well aware of the potential for disaster when such tolerances haven't been allowed for, but now so are you.
These stairs are usually designed with one thing in mind and that is impact. Geometric stairs usually dominate an entrance hall and are there specifically for the dramatic first impression they create. Let's face it, they don't get you to the top any faster do they?
A couple of tips for designing these stairs. Firstly try to avoid landings in a geometric or curved stair. Also try to avoid a pitch or radius changes at any point. All of these things have an effect on the aesthetics of the stair by corrupting the flowing lines that a stair of this type should feature.
If assistance is required when designing a geometric stair of any type, just call one of our consultants. They'd be only too pleased to help.
