TimberTech Common Questions (FAQ)

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


How much CableRail do I need?

TimberTech Premier Rail CableRail by Feeney is easy to estimate. Just remember the basic rule that a 36" rail requires 9 runs and a 42" rail height requires 11 runs of cable. For a 20’ run at a 36" rail height, it would require 9 rows of 20’, or 180 lineal feet of cable. For a 20’ run at a 42" rail height, it would require 11 rows of 20’, or 220 lineal feet of cable.

How strong does the frame need to be to support the tension loads of the CableRail infill?

Each cable, when properly installed, will have a tension load of at least 300 lbs to minimize cable deflection. It is important that frames are designed and built strong enough to support these loads. Review frame requirements details to help you prepare the railing for cable infill.

What is the maximum cable run?

Straight runs should terminate or have an In-Line Turnbuckle every 50 feet or less. In addition, cable runs with bends should terminate or have an In-Line Turnbuckle after every 2nd bend or 40 feet, whichever distance is less.

What is the recommended post spacing?

TimberTech recommends having a post or vertical member (intermediate baluster) at least every 3'. With the posts/verticals spaced 3' apart and the cables spaced 3" apart, you should be able to tension the cables such that they won't open past the 4"-inch sphere code requirement when a reasonable force is applied. Please review the CableRail web pages for installation instructions and complete details on frame design requirements. Intermediate pickets are available in 36" and 42" lengths.

Can the cables be spaced farther apart than 3 inches?

No, TimberTech strongly advises against exceeding a 3-inch spacing. The International Building Code states that a 4" sphere cannot pass through any opening in your railing, and since the cable is non-rigid, the flex of the cable must be taken into account. Therefore, it is recommended spacing the cables no more than 3" apart and the posts or vertical members (intermediate balusters) no more than 3' apart in order to allow for possible cable deflection and meet the intent of the code. Before starting a TimberTech CableRail project, always check with the local building department to see if there are any special local requirements for using and installing cable railings.

Composite Rail Series

What size balusters do I need for a 42" final rail height?

While using the composite balusters, the 35" balusters would be for the horizontal application and the 37" baluster would be for the complementary stair application.

Is the Composite Rail Series (RadianceRail) compatible with any other systems?

RadianceRail is unique in design with the benefit of matching composite baluster colors, sleeves, caps, and skirts with no visible hardware. It also creates a high-end look by complementing the planks in the TimberTech line. DeckLites by TimberTech can also be added for a subtle glow around any RadianceRail or RadianceRail Express Systems. RadianceRail Express products such as the post sleeve, post cap, and post skirt combination can be intermingled with the RadianceRail System to create a sleek look for a smaller deck application.

I have a chip in the cap stock (outer layer) material on my composite railing(RadianceRail); can I touch it up?

Yes. Automotive touch-up paint such as Duplicolor 2-in-1 Scratch Fix works well and is available at most department or automotive retailers.

What size balusters do I need for a 36" final rail height?

While using the TimberTech RadianceRail Composite Balusters, the 29" balusters would be for the horizontal application and the 31" baluster would be for the complementary stair application.

How has the RadianceRail System changed?

RadianceRail is now part of the TimberTech Classic Composite Rail Series. The RadianceRail Top Rail is sold separately from the Universal Rail Packs for Composite Balusters or Universal Rail Packs for Cable, Glass or Aluminum Balusters.

Fasteners & Accessories

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, the CONCEALoc Router Bit will be needed to create a groove at each joist.

Are CONCEALoc fasteners visible?

CONCEALoc Hidden Deck Fasteners have a light brown coating. This coating helps the fastener hide in the shadow of the joists, and makes the fastener virtually invisible. Combine with TimberTech Cortex for the perimeter boards and stairs which are available in multiple colors that complement TimberTech decking.

Can CONCEALoc Hidden Fasteners be used with other decking styles?

Yes. CONCEALoc Hidden Fasteners can be used with all of the TimberTech solid planks (with a routed groove): XLM, Earthwood, TwinFinish, and DockSider.

Are screws provided with CONCEALoc fasteners?

All CONCEALoc fasteners include stainless screws.

*For the best value and ease of installation choose the TimberTech CONCEALoc FREE Installation Gun Promo with 2 Buckets of Fasteners.

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 the Installation & Maintenance Guide.

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 1/2” towards the long point of the joist, so the screw will not exit the side of the joist when driven.

RadianceRail Express

Can RadianceRail Express brackets swivel like regular RadianceRail for a curved deck?

TimberTech RadianceRail Express hardware does not pivot like the TimberTech RadianceRail hardware, but it will accommodate up to a 45 degree angle.

Does the RadianceRail Express System work with the RadianceRail System (now Composite Rail Series)?

The Composite Post Sleeve, works with all TimberTech Railing Systems. In addition, a variety of TimberTech post caps and skirts are compatible with the system to achieve a unique product with extended color options and larger posts. Otherwise, each system is unique and is not intended to be used in conjunction with other railing systems or fasteners.

What lighting system is compatible with RadianceRail Express?