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Arkimede is a curved sliding pocket-door system, not simply a decorative door-panel model. Ermetika lists single- and double-door versions, with configurations for plaster and plasterboard walls. The “Alma Building Products” reference comes from a 2007 article; it does not confirm that Alma currently sells or stocks the system. If you are specifying one, settle the wall type, opening, dimensions, radius and door arrangement before ordering or finishing the surrounding wall.
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What is an Arkimede door?
Arkimede is Ermetika’s curved sliding pocket-door system. Instead of swinging open, its curved leaf—or two leaves in the double-door version—slides into a curved wall cavity. That makes the shape and construction of the pocket part of the door specification: this is not just a standard flat panel with a decorative curve.
The manufacturer’s current product page presents single- and double-door configurations. Its catalog further distinguishes versions for plaster and plasterboard walls. These distinctions affect which product code and technical sheet apply, so a reference to “Arkimede” by itself is not enough to define what should be supplied.
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The product is sometimes described online as the “Arkimede Double Curved Door Alma Cavity Slider.” That phrasing reflects a historical supplier reference, not proof of current availability from Alma. Architecture & Design published an item about the double curved door on 18 December 2007 and said at that time it was available from Alma Building Products. Treat that as dated context, not a current quote, stock listing or guarantee.
Which Arkimede configuration should you specify?
Start with four decisions: single or double door, plaster or plasterboard wall, the opening and passage dimensions, and the curve radius. Confirm each against the current product documentation for the exact variant; the catalog examples below are not interchangeable specifications.
Single or double leaf
A single-door arrangement has one curved leaf that enters a pocket on one side. A double-door arrangement uses two leaves that meet at the center and retract into pockets on either side. The catalog uses AKSI and AKSC for single-door examples, and AKDI and AKDC for double-door versions; the “I” and “C” variants correspond to plaster and plasterboard, respectively. Confirm the code and details with the supplier rather than ordering from a shorthand description alone.
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Ermetika supplies separate product sheets and fitting instructions for plastered and plasterboard walls. The catalog identifies AKSI/AKDI as plaster versions and AKSC/AKDC as plasterboard versions. These are distinct system variants, not finish choices to resolve after the frame is installed. Tell the supplier what wall construction and finished wall thickness the project requires, then use the matching documentation.
This distinction also matters to painters and decorators. The pocket and surrounding wall need to be coordinated with the selected wall build-up and final finish. Do not assume a plasterboard product sheet describes a plaster installation, or vice versa; check the exact instructions before setting out or finishing the opening.
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Passage dimensions and wall thickness
The catalog shows how dimensions vary even within a single-door family. For the plaster single-door AKSI, it lists passage lengths of 600–1000 mm for a 107 mm wall and 600–1200 mm for a 125 mm wall. For the plasterboard single-door AKSC, it lists passage lengths of 600–1200 mm for a 125 mm wall. These are catalog specifications for those named configurations, not universal Arkimede limits.
Passage length is only one part of the dimensional check. The catalog treats feasible dimensions as configuration-specific, and the required height, wall thickness and opening must be verified on the technical sheet for the selected model. Do not use the AKSI figures to size a double door, a plasterboard system with another wall thickness, or a non-standard request. Ask the supplier to confirm the complete dimensions for the precise assembly and project opening.
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The catalog says opening direction must be specified at order. It lists standard radii of 1000, 1200, 1500, 1700 and 2000 mm, measured at the track axis, and describes the possibility of requesting non-standard radii. A radius number without that measurement reference can be misunderstood, so preserve the track-axis basis when passing dimensions between designer, supplier and installer.
Do not assume every radius is available in every single- or double-door, wall-finish and size combination. The catalog establishes standard radii and mentions non-standard requests; it does not make every combination a standard configuration. Obtain written confirmation of the exact radius and dimensions before the opening and curved wall are fixed.
What should you verify before ordering?
Use this checklist to turn a general product name into an orderable specification. The most important step is having the supplier confirm that all the choices work together for the required configuration.
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- Identify the system: state Arkimede and whether the design is single or double leaf.
- Name the wall construction: specify plaster or plasterboard and the intended wall thickness. Match the product sheet and fitting instructions to that wall type.
- Record the opening: provide the required passage dimensions and project opening dimensions. Ask the supplier to confirm feasibility for the chosen variant rather than inferring it from another catalog row.
- Specify the curve: state the required radius and confirm that it is measured at the track axis. If it is not one of the listed standard radii—1000, 1200, 1500, 1700 or 2000 mm—ask whether the requested radius can be supplied for the selected configuration.
- State opening direction: include it in the order information, as the catalog specifically instructs.
- Request the applicable documents: obtain the current product sheet and fitting instructions for the exact plaster or plasterboard model and the selected door arrangement.
- Coordinate the wall finish: make sure the builder, installer and painter are working from the same wall type, dimensions and system documentation before the surrounding surface is completed.
- Confirm commercial details separately: ask the current supplier about stock, price, lead time and warranty. The available product sources do not establish those terms or current local availability.
This process avoids the common specification error of treating “curved pocket door” as a complete order description. Two systems can share the Arkimede name but differ in leaf arrangement, wall type, dimensions and radius. A confirmation tied to the specific product code and current drawing is more useful than a general statement that the door is suitable.
What does the catalog say about installation and safety?
Ermetika’s catalog gives a specific warning: “The panel fully enters the wall cavity. For safety reasons please keep the door out of the pocket up to the handle.” Preserve that instruction when discussing the system with the installer; do not assume the whole leaf should be pushed into the pocket. The catalog also provides fitting instructions by wall type, so use the instructions for the selected plaster or plasterboard configuration.
A curved pocket system has to be coordinated with the wall construction and its curved cavity. That is why finish and opening decisions belong in the specification stage, not only at decoration. Before work proceeds, have the installer confirm the relevant product documentation and explain how the quoted safety warning applies to the supplied door and handle arrangement. This article cannot replace the manufacturer’s fitting instructions or a project-specific installation plan.
Ermetika lists round and square handle sets, with and without locks, and 100 kg and 120 kg track kits as accessories. Their presence in the catalog does not establish which accessory is appropriate for a particular project. Confirm compatibility and selection with the supplier for the exact door configuration rather than treating an accessory listing as a recommendation.
How should painters coordinate with an Arkimede installation?
For a painting or decorating project, the practical takeaway is to identify the door system and wall variant before preparing or finishing the surrounding wall. The manufacturer provides different documentation for plaster and plasterboard installations, and the catalog’s dimensions depend on the selected configuration. A painter should not assume that either wall type, opening size or finished wall thickness can be altered without checking the system documentation and installer’s requirements.
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Before surface work begins, confirm which wall construction is specified, where the pocket system sits, and which dimensions the installation team has approved. Keep the current product sheet and fitting instructions available to the trades coordinating the opening. If a proposed finish or wall change affects the documented build-up or dimensions, refer it to the supplier or installer for confirmation instead of improvising around the pocket.
The product sources do not give a paint brand, coating system, drying schedule, or special surface-preparation procedure for Arkimede. Do not infer one from the door’s curved shape. Follow the applicable wall-finish specification and coordinate access and protection with the installation team; any product-specific finishing instruction should come from the current manufacturer documentation or the project’s responsible installer.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Is Alma Building Products still the supplier?
The available source does not establish that Alma Building Products currently supplies Arkimede. The Alma reference is an Architecture & Design article dated 18 December 2007 about the double curved door. Its statement that the door could be custom-built for specialized requirements describes what the article reported then; it is not a present-day product guarantee or confirmation that custom dimensions remain available.
The current manufacturer source identifies Arkimede as an Ermetika system and provides configuration information. For a current purchase, contact Ermetika or a current authorized supplier and confirm local availability, pricing, lead time and warranty directly. No current stock or commercial terms are established by the cited sources.
What is the safest way to compare product information?
Compare like with like. A passage-length range from a plaster single-door model does not automatically apply to a plasterboard or double-door model. Likewise, a standard radius list does not establish that every radius works with every width, height and wall thickness. Make the product code, wall finish, passage size, opening direction and radius visible on the same specification or supplier confirmation.
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The most reliable starting points are Ermetika’s current Arkimede product page and its Arkimede catalog. The older Architecture & Design article about Alma Building Products is useful as historical context only. If the current product page, catalog, supplier quote or local requirements do not align, ask the manufacturer or supplier to resolve the discrepancy before ordering or constructing the wall pocket.
Frequently Asked Questions
Can I still buy the Arkimede double curved door from Alma Building Products?
The available Alma reference is an Architecture & Design article published on 18 December 2007, so it does not establish present-day stock or sales. Contact Ermetika or a current supplier to check availability in your location.
Does Arkimede come with a handle or lock?
Ermetika’s catalog lists round and square handle sets, including versions with and without locks. Confirm which options are compatible with the specific system and whether they are included in the quote.
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The cited catalog and product page do not establish current local prices or lead times. Request a current quote and delivery estimate for the exact configuration.
Can Arkimede be made with a custom curve?
The catalog lists five standard track-axis radii and describes requests for non-standard radii. It does not guarantee that every custom radius can be made for every configuration, so have the supplier confirm feasibility in writing.
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