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Common Questions - FAQ

TimberTech CONCEALoc Hidden Deck Fasteners


We’ve gathered the most commonly asked questions about TimberTech CONCEALoc Hidden Fasteners. If your question isn't answered here, you may also contact us with any questions you may have.

Installation Questions

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Product Questions

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Installation Questions


What tools are required to install the CONCEALoc Hidden Fasteners?
No special tools are required when using TimberTech grooved planks - just a drill/driver. We provide a #1 square drive bit with the screws and clips. When using TimberTech solid planks, a router with a slot cutting bit will be needed to create a groove at each joist. You can find complete details on how to do this in the Installation Instructions.
Can CONCEALoc Hidden Fasteners be used on angles?
Yes. Any angle up to 45 degrees can be achieved. On angles; offset the center of the fastener ½” towards the long point of the joist, so the screw will not exit the side of the joist when driven. Reference the Installation Instructions for additional details.
Is it possible to replace a plank installed with CONCEALoc Hidden Fasteners, if it gets damaged after installation?
Yes. You can find complete details on how to do this in the Installation Instructions.

Product Questions


Can CONCEALoc Hidden Fasteners be used with other decking styles?
Yes. CONCEALoc can be used with all of the TimberTech solid planks (with a routed groove): XLM, Earthwood, TwinFinish, and DockSider.
Do I need to gap my planks when I'm using CONCEALoc Hidden Fasteners?
The CONCEALoc fasteners provide consistent spacing between the sides of the planks. You will need to gap the ends at all butt joints per our Installation & Maintenance Guide, which can be found in the Installation Instructions.
Are CONCEALoc fasteners visible?
CONCEALoc Hidden Deck Fasteners have a dark brown coating. This coating helps the fastener hide in the shadow of the joists, and makes the fastener virtually invisible.
What type of screw is provided?
Every carton and bucket of CONCEALoc Hidden Fasteners includes enough stainless steel screws to install the box of fasteners. A #1 Square Drive bit is also provided.