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Type 1 Fixes may be used to mount ceiling panels quite successfully; using the ‘Buttonfix strength testing report’ here, and using figures based on the maximum perpendicular pull-out force rather than shear force, we can ascertain a maximum panel weight.
For example; mounting a panel using 4 x face-fixed Type 1 Fixes, a maximum panel mass of 148kg may be accommodated (Including a 1.4 safety factor and using bolted fixings).
Type 2 Fixes are NOT suitable for ceiling panels, if the panel load is pulling directly to disengage the Fix and Button. Even if a ceiling panel under test appears secure, and the panel weight is well below the Fix disengagement force, the steady load on the Fix ‘jaws’ causes creep in the polymer, which may lead to the panel disengaging days, or even weeks later.
I use screws which are not those specified – can I use them to attach the Buttons or the Button-fix?
Yes, you probably can, but you will need to try them out to see. Please ensure that the heads of any screws used in the Buttons, or in the rebated Fixes, are flush, or just below the surface of the mouldings, so that they do not clash. See the ‘Videos’ section of the website for recommended fixings, or for more detail download the ‘Suggested Fixings for Buttonfix’ PDF from the Useful Information page.
The limiting factor dictating the maximum load is, in most cases, the pull-out load of the fixing screws, and the strength of the materials being mounted. Therefore, the fixings used should be the largest practical, given the thickness of the panel to be mounted. For Type 1 Fixes on thin panels, Varianta Euroscrews (CSK Ø6.2mm for Ø5mm pilot holes) are recommended.
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To keep a panel flat I have used a lot of Button-fixes and the click fit is now too strong, what can I do to make it easier to fit and remove?
For Type 1 Fixes, if you remove the détente ‘ears’ using a small flat screwdriver or needle nosed pliers (See the ‘useful tips’ section under the Type 1 Fix heading in the ‘Videos’ section of the website), this will remove the ‘click’ fit, reducing the force required to install and remove the panel. If you do this, please protect your eyes, or cover the Fix with a gloved hand. If required, you can remove all of the détentes to facilitate a frequently removed vertical panel, but please be aware that there will be no force other than gravity keeping it in place.
On Type 2 Fixes, the détente force can be reduced by carefully removing a small amount of material from the détente ears using a small file or sharp knife (file or cut from both sides, retaining the angled profile of the edge); do this incrementally until the required pull-off force for the panel is achieved.
Varianta Euroscrews are useful for giving good strength in thin panels, normally in particleboard. The orange Buttons are designed to accept countersunk Ø6.2mm Euroscrews for Ø5mm pilot holes. While both the Type 1 and Type 2 Fixes are not specifically designed for use with Euroscrews, they can function satisfactorily. For instance the Ø6.2mm Euroscrews are a tight fit in the Type 1 Fix holes, but they install readily when the Fix is in-situ with the pilot holes in the panel to guide them. The Type 2 Fix will only accept Ø4.2mm Euroscrews for Ø3mm pilot holes. Please see the Videos page.
For more detailed information, including screw length/panel thickness guides, please download the ‘Suggested Fixings for Buttonfix’ PDF from the Useful Information page.
The détente will generally deter accidental displacement; if necessary an aluminium or PVC extrusion, or even a small block may be screwed into the 15mm ‘drop’ gap above the panel, to stop it being lifted.
By orienting the Fixes at 90 degrees, panels can be slid in sideways. Adjacent panels can also be mounted similarly, but of course the first panel(s) installed will effectively be locked in place, unless the subsequent panels are removed: This can be advantageous for providing security for a run of panels, requiring only the last panel installed to be secure.
Type 1 Fixes can carry a significant cantilever load; as a general rule of thumb, it is a good idea to keep the cantilever distance, that is the shelf depth, shorter than the height between the Fixes. In most circumstances, the screws will pull out of the panel before the Button-fixes fail. Please download our load test results from the Useful Information page on this website. This should help you to specify the number of Button-fixes to use for a given load. However, we strongly recommend that you perform your own tests for your specific application and the materials that you intend to use and that you use a generous safety factor.
Type 2 Fixes are designed as a push/pull fit, and will therefore not take a cantilever load. Assuming that the screws and substrate are properly matched, a vertical panel under no other loading than its own weight, fixed with four Type 2 Fixes, can safely weigh 80kg. Other configurations should always be properly tested by the user to their satisfaction.
Each Type 2 Fix requires approximately 12kg force to separate the Button and Fix; this should be taken into account when designing your installation and defining your safety factors.
Type 2 Fixes should only be used on vertical panels or in applications where the weight of the panel does not act to separate the fixing. In critical applications for Type 2 Fixes, always use the safety cord accessory.
Please note that safety cords are sold separately from the Button-fixes.
Varianta Euroscrews are useful for giving good strength in thin panels, normally in particleboard. The orange Buttons are designed to accept countersunk Ø6.2mm Euroscrews for Ø5mm (0.197″) pilot holes.
For more detailed information, including screw length/panel thickness guides, please dowload the ‘Suggested Fixings for Buttonfix’ PDF from the Useful Information page.
Yes, but you will need to machine a stepped rebate for the Type 1 Fix moulding – please ensure that the Fix is not sub surface, otherwise the panel may bind up on installation. Note that if the Fixes are used on the removable panel, the screws holding the Fix will no longer go into the full panel thickness, and may have a reduced pull-out strength.
Yes; the lime green countersunk screw Button will accept an M5 countersunk screw. The rebated Fix will accept M4 countersunk screws, while the surface-mounted Fix will accept M4 pan head screws, ideally with washers, or for maximum strength M5 pan head screws, although they are a tight push fit in the fixing holes.
Yes, generally using M5 x 25 steel ‘penny’ washers; however, if the Buttons/Fixes are binding due to angular misalignment, it is best to use washers that are within the ‘footprint’ of the Button (i.e. Ø18mm or less, for example part number 1000750000VR here) which will allow more angular tolerance. Bear in mind that spacing off the Buttons will increase the bending forces on the button fixing and reduce its weight carrying capacity.
Type 2 Fixes are ideal for mounting bath panels, especially in conjunction with the Type 2 Fix-markers (available on the Accessories page), which remove the need for any measuring. We have made a video, showing a typical bath panel installation. Note that you can get by with fewer Fix-markers; you just need to do the Fix-marking in two or more goes, having first marked, and fixed, the two top corners of the panel.
You can use Ø4.8mm pop rivets, with washers to protect the plastic of the Fixes, and/or self tapping screws, but you will need to satisfy yourself of the fixing type and loadings by thoroughly testing the application. Recessing the Fixes into sheet material or tube would be possible, but would require machining with appropriate equipment.
For maximum strength on plasterboard, fixing through to studs or noggings is best. If this is not practical, direct fixing onto the plasterboard is possible, but the maximum loadings must be reduced significantly.
The next best option is to attach the Fix to the plasterboard using expanding metal fittings, such as Rawl M5 Interset sleeve fixings. These have the advantage of being demountable, as well as having a good load capacity.
If necessary, and if maximum load is not so critical, the Button may be fixed to the plasterboard; Interset fixings may be used for fixing the buttons, but the standard pan head M5 screw will need to be substituted with a countersunk M5 screw of a suitable length. Alternatively for fixing the Buttons, fixings such as the Rawl ‘4ALL’ universal plug (Ø8mm for a Ø5mm screw) may be used. Using a Ø30mm M5 penny washer under the button helps spread the load.
In these circumstances we recommend fixing levelled battens to the wall first. If this is not possible, please be aware that the wall may not be flat, and you may need to use washers to both space the Buttons off the wall for levelling, and to keep them parallel to the panel: although there is a degree of flexibility and tolerance in Button-fix, misalignment of the Buttons and Fixes may cause binding, and difficulties in engaging or removing the panels.
Yes; the Type 2 Fix allows perpendicular/90 degree fixing of panels.
Yes, the Type 1 Bonded was developed with solid surface materials in mind; a single Fix has been tested rebated into Corian, using Corian glue, to an astonishing 625Kg at failure!.. and the screw attaching the Button sheared before anything else..
Even face-fixed to Corian, the Fix failed at over 200Kg in shear.
Alternatively use M4 ‘Squirrel’ inserts (www.squirrels-uk.com), or M4 Rampa BAN/BAV inserts (shopen.rampa.com) to attach Type 1 or Type 2 Fixes: (use with suitable washers when using pan head screws). The buttons ideally require M5 CSK screws for maximum strength; use M5 Rampa BAN/BAV inserts. For reduced loadings, the Buttons may also be fixed using M4 CSK screws.
Yes, with the proviso that the Button-Fixes are not subject to direct sunlight (Ultra Violet light will weaken all plastics with age; however in most situations as an ‘invisible fix’, the Button-fix fittings will be shielded from direct sunlight) The Button-fix fittings are moulded in a glass filled nylon polymer that is tolerant of wet conditions and has good resistance to acid and alkalis. Please make sure that you use stainless steel screws into suitable materials.
External panels will be subject to greater fluctuations in temperature (especially if subjected to direct sunlight); on larger panels this may cause problems, as the expansion may cause buckling/increased stress on the fixings. Always ensure the design (length/material) of the panels is taken into account, and the Fixes are mounted to best accomodate any expansion; for instance, the orientation of the Fix should be parallel to the longest side: Therefore, a long horizontal panel is best intalled using fixes oriented horizontally, which gives far more tolerance for any expansion. Always ensure that the panels are secured with some kind of stop, particularly if mounted horizontally, to avoid any possibility of detachment.
Wills Watson+Associates designed Button-fix. They specialise in professional products. You can see their work, from large-scale architectural products to small medical devices, on their website: www.wills-watson.co.uk
You can bond directly to glass using Type 1 Bonded, although care should be taken to ensure the adhesive used is suitable for whatever finish or surface is present on the rear face of the glass.
Another option, especially if using thin glass or mirror, is to bond the glass to 3mm hardboard first, then use Type 1 Bonded fixes. This gives a reasonable 10mm standoff from the wall.
Alternatively, use thicker MDF or plywood backing panels with the Type 1 Fixes (or Type 1 Bonded) installed in the usual way, either face-fixed or rebated.
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