2025 AUSTRALIA AND NEW ZEALAND DECKING INSTALLATION GUIDE
QUICK REFERENCE GUIDE Mix and Match Colors/Color Variation
INSTALLATION TIPS
W hen installing any Trex decking product, especially Trex Transcend Tropicals, it is a good idea to mix and match all the boards on the job site prior to installation to ensure an appealing mix of light and dark tones. Installation Temperatures P lease be sure to follow the temperature suggestions at installation to allow for the expansion and contraction of Trex WPC boards. Refer to page 3 for additional information. Cutting Ends of Boards It's required that ends of Trex decking boards be cut to ensure a good square cut prior to installation. Refer to page 12 for additional information. Spanning Requirements Trex decking requires different joist spanning requirements based on load applications or deck orientation. Refer to page 8 for additional information. Gapping Requirements Trex decking requires product to be gapped at installation to ensure proper spacing for expansion and contraction. Refer to pages 10 -11 for additional information. Special Requirements When Using Trex Hideaway ® at Abutted Deck Boards W hen using the Trex Universal Hidden Fasteners or Trex Elevations ® Hidden Fasteners where the ends of two deck boards meet (abutted ends), it is critical to use these fasteners in the proper way. Refer to page 12 for additional information. NEED HELP? Trex provides a variety of valuable resources to answer your questions or concerns such as locating warranty information. For additional assistance, check out:
Capturing that exotic beauty when installing a Trex Transcend ® deck in tropical colors is as easy as mixing and matching.
To start your deck design, mix and match all tropical boards on the jobsite.
Start lining them up, putting dark against light, as a practice run to help visualize the final look. You’ll see that the variety of color board by board develops its own rich, random pattern full of lights and darks.
Continue mixing and matching boards to ensure an appealing mix of light and dark tones across the entire deck.
For complete installation instructions, visit trex.com
This symbol indicates text continues to next page.
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TDLTTRST0312
Arbor Forest Products Ltd. 01469 532300
JOB SITE STORAGE MOISTURE PROTECTION
TEMPERATURES AT INSTALLATION If boards have been stored in a cold environment, or if installing in localities prone to large temperature shifts within a 24-hour period, its best to lay boards out on framing (DO NOT ATTACH OR CUT) to allow boards to acclimate to current temperatures BEFORE installation.
ALWAYS cover decking products, even on construction site, until ready to be installed to prevent moisture. Tannins (brown spotting) can be washed off boards if this occurs.
STORAGE REQUIREMENTS: Store decking on a flat level surface and ALWAYS use proper supports. DO NOT store directly on the ground. When stacking decking bundles, supports should start approximately 250 mm from each end and be spaced approximately 600 mm on center. In addition, supports should line up vertically/perpendicular to the decking product. Adjust supports accordingly if bundles are loose. (IMPORTANT TO NOTE THAT PROPER SUPPORT SPACING MUST BE IN PLACE FOR THESE HEIGHTS). When stacking multiple bundles, ensure that supports line up vertically down through each stack.
TOOLS NEEDED
Standard power drill
Mitre saw blade (254 mm—305 mm. 40 teeth or more)
Carbide-tipped blades
Trex groove router bit
Trex groove cutter
SAFETY
* Transcend decking: maximum stack height is 14 bundles. TREX AND STATIC ELECTRICITY
While this is not common, static electricity can occur on walking surfaces in dry climates or in areas where dry winds and dust-borne particles lay on the decking surfaces. Static electricity can build up on occupants walking across any composite decking surface, including Trex, then produce a small static shock if they touch a grounded metal surface such as a railing, door, etc.
Long sleeves
Safety glasses
Dust mask
Gloves
For approved AU spans, refer to https://au.tre x.com/ trex-owners/downloads/and view detailed span tables provided by SOTO Engineering located under Evaluation Service Reports.
3
PLANNING AHEAD
Trex Decking: » W hen installing any Trex decking product, especially streaked boards, it is a good idea to mix and match all of the boards on the job site prior to installation to ensure an appealing mix of light and dark tones. See inside cover for more details. » F or added protection to wood framing, use Trex® Protect® Joist and Beam Tape on the top of joists, rim joists, and ledger boards to help prevent rot and wood decay. Refer to trexprotect.com for more details. Trex Railing: » F irst, pick the railing style you want. » C alculate your spanning based on the railing you choose. » T rex Transcend horizontal railings are made to be installed at maximum of 1.83 m or 2.44m clear span (as of 2025). » F or post placement on stairs, it is VERY IMPORANT to plan your post spacing based on the length of the rail and angle of the stairs. For nominal 1.83m to 2.44m stair rail lengths, stair post spans (measured horizontally) will be less than 1.83m to 2.44m due to the angle of the stairs. » G rill/Bar-B-Q placement: A good recommendation to help prevent damage to your railing is to not have a Grill/ Bar-B-Q too close to your railing. Allow for ample airspace 450mm - 760mm is recommended – refer to Grill/Bar- B-Q manufacturer for additional details between the back/sides of your Grill/Bar-B-Q to help prevent charring or staining to the railing.
Installing Fireplaces and/or Fire Pits With Trex Decking:
» D etermine if fire will be gas or timber burning. ( Note: Most fire pits shown in Trex images are gas burning.)
» F or gas, the fire pit is installed by cutting around the Trex decking. It is not to be installed on top of Trex decking. A fire-resistant material is installed under the fire pit and a protective “wall” made from stone or other fire-resistant material is installed to hold fire pit in place and also protect the decking from heat. » F or timber, fire pits are not recommended on top of Trex decking unless using a non-flammable and heat- protective barrier between the decking and the fire pit. Timber-burning fire pits can damage the decking due to extreme heat from the bottom of the fire pit and/or burning embers “shooting” onto the decking.
Refer to au.trex.com to view detailed instructions for railing.
Trex Lighting: » P lan locations of lights, power supply, timer, and dimmer. These should be accessible for service if necessary. » Install wiring before decking and railing have been installed. » DO NOT run wires between joists and deck boards. See individual instructions included with Trex Lighting PRIOR to installing Trex decking or railing products. Installing Hot Tubs, Planters, and Seating: » P lan ahead proper joist spanning if required. (This is especially important if installing a hot tub.)
Trex® RainEscape® Deck Drainage System: » P lan ahead for deck layout to allow for proper placement
of Trex RainEscape within the joist system. » M ake sure joists are straight and square.
See www.trexrainescape.com for more information on TrexRainEscape recommendations and installation. Trex RainEscape is manufactured and distributed by IBP, LLC, under a trademark license with Trex Company, Inc.
4
TREX DECKING CARE AND CLEANING GUIDE
All exterior building materials require cleaning. Generally, soap and water is all that is required to clean Transcend decking products. For additional information, see table below.
PROBLEM
SOLUTION
The affected area should be sprayed off with a hose to remove surface debris. Use warm soapy water and a soft bristle brush to remove dirt and debris from the embossing pattern.
Dirt and Debris
A pressure washer with no greater than 3100 PSI that has a fan attachment/adjustment and soap dispenser may be used to remove dirt, concrete dust, or other types of construction dirt. Spray deck with soap, then follow by gently scrubbing each deck board with a soft bristle brush. Spray/rinse each individual deck board using a fan tip no closer than 200 mm from the decking surface. RINSE THOROUGHLY. If dirty water from cleaning is left to dry, a film will remain on the decking surface. When working with cement, concrete, mortar, or stucco, protect the decking as much as possible in order to not get dust particles on the decking surface. These particles, once they get hot or wet, can cause a reaction on the decking surface and are very difficult to remove. If particles get on the decking surface, Trex recommends using Sakrete™ Concrete Dissolver (www.sakrete.com/products/ concrete-dissolver) . BE SURE TO FOLLOW MANUFACTURER'S INSTRUCTIONS. Hard water is water with high amounts of mineral deposits like lime, silica and calcium. When the water dries, deposits are left behind, leaving unsightly spots on surfaces. This is not a defect of Trex products but an issue with the water itself. Generally, these deposits can be cleaned with white vinegar on decking surfaces. Rinsing is required, so care should be taken to not use hard water for this purpose. If hard water must be used, dry with a cloth or use a blower to dry surfaces. In some cases a deck brightener product may also be used to help clean hard water stains.
Using a Pressure Washer (General Cleaning Issues)
Issues with Concrete, Cement, Mortar, or Stucco Dust
Hard Water Staining
Most colored chalks are permanent and may discolor the surface. Use only Irwin Strait-Line® Dust-Off Marking Chalk (purple), DeWalt® Blue Chalk, or DeWalt® Orange High Visibility Chalk.
Chalk Lines
Remove all debris from the deck using a hose or broom. Once the deck surface is dry, apply a deck “brightener"* to the deck as directed by the manufacturer. Deck Brighteners contain oxalic acid, which will also remove tannins.
Tannins Due to Debris
A plastic shovel may be used to remove snow from the deck. Use calcium chloride or rock salt to melt the snow and ice from the deck surface.
Ice and Snow
All food spills should be removed as soon as possible. The surface must be cleaned within seven days to maintain the stain warranty. To remove, spray off with a hose and use warm, soapy water and a soft bristle brush to remove spills from the embossing pattern.
Oil, Grease, and Food
If debris such as pollen and dirt is allowed to remain on the deck surface, mold can feed on the biofilm. Using a hose and warm, soapy water with a soft bristle brush is recommended to remove the food source and mold.
Mold and Mildew
5 NOTE: Construction methods are always improving. Please refer to www.trex.com for the most up-to-date installation requirements.
TREX DECKING CARE AND CLEANING GUIDE
PROBLEM
SOLUTION
While this is not common, static electricity can occur on walking surfaces in dry climates or in areas where dry winds and dust-borne particles lay on the decking surfaces. Static electricity can build up on occupants walking across any composite decking surface, including Trex, then produce a small static shock if they touch a grounded metal surface such as railing, door, etc. This condition can be decreased greatly with the use of a product call ACL Staticide ® . Two products tested were General Purpose Staticide ® and Heavy Duty Staticide ® . Both are effective in greatly reducing static electricity on Trex decking surfaces. Apply full strength using a mop on a dry decking surface, and allow to dry; no rinsing or diluting needed. Products are non-toxic, non-flammable, non-staining (will not change the color of decking surface), completely biodegradable and safe to use. Product is water-based and may require a second application after rain or other weather conditions. Over a period of time, the effect of static will dissipate naturally on the decking surface.
Trex and Static Electricity
See link for more information on product: https://www.aclstaticide.com/categories/anti-static-coatings
Use caution when using rubber-backed mats (i.e. welcome mats, etc.) as these may contain substances that can sometimes discolor or lighten the decking surface.
Rubber Mats
Strait-Line® is a registered trademark of Irwin Industrial Tool Company. Sakrete™ is a trademark of Oldcastle APG, a CRH Company. ACL Staticide® is a registered trademark of ACL Incorporated. *Use of products containing bleach or acid can lighten the lighten the surface of Trex. Use in an inconspicuous area to determine whether you like the effect. Neither product will affect the structural integrity of Trex. **Use of a pressure washer greater than 3100 PSI could damage the boards and void the warranty.
NOTE: Construction methods are always improving. Please refer to www.trex.com for the most up-to-date installation requirements.
6
TREX DECKING, FASCIA, AND FASTENING SYSTEMS NOTE: Check with local distributor for product availability in your area.
25 mm Square-Edge Board Actual Dimensions: 140 mm x 25 mm x 5.48 m 4.8m and 6.1m lengths - special order
A
25 mm Grooved-Edge Board Actual Dimensions: 140 mm x 25 mm x 5.48 m 4.8m and 6.1m lengths - special order
B
C
14 x 184 mm Fascia Actual Dimensions: 184 mm x 14 mm x 3.65m
14 x 288 mm Fascia (special order only)
D
Actual Dimensions: 288 mm x 14 mm x 3.65 m
33 mm Square-Edge Board Actual Dimensions: 140 mm x 33 mm x 4.88 m
E
F
Trex Universal Start Clip/Elevations Start Clip Black-coated Stainless Steel (steel grade 302SS)
Trex Elevations Universal Hidden Fastener (for use with Steel Substructure) Glass-filled Nylon (steel grade 410SS)
G
Trex Universal Hidden Fastener (for use with Timber Substructure) or Glass-filled Nylon (steel grade 302SS) Trex Universal Hidden Fastener (for use with Aluminum Substructure)
H
Glass-filled Nylon (steel grade 300 series)
I
Router Bit
J
Fascia and Deck Screws (Supplied by Distributor) Supplied by installer Refer to next page for recommended decking and fascia fasteners. All plug based screws require the use of the manufacturers approved depth setting tool.
Images shown here do not reflect plug based fasteners
K
7
SPANNING REQUIREMENTS For approved AU spans, refer to https://au.trex.com/trex-owners/downloads/ and view detailed span tables provided by SOTO Engineering located under Evaluation Service Reports. Special Patterns W hen planning a unique pattern, you will need to adjust the framing to support the surface pattern. Many decks are designed to take advantage of angles, as shown below.
Herringbone Pattern
Picture Frame Pattern
Breaker Board Single Joist
Breaker Board Double Joist
Adjust Joist Spanning to Accommodate Angled Decking Patterns
30°
90°
60°
45°
Perpendicular to joists.
At a 60° angle, maximum joist spanning is 50mm less than perpendicular.
At a 45° angle, maximum joist spanning is 100mm less than perpendicular.
At a 30° angle, maximum joist spanning is 1/2 of the distance listed than perpendicular.
8
RECOMMENDED FASTENERS
COMPATIBLE FASTENER MATERIALS FOR USE WITH TREX
Stainless Steel: 410 Series or 1.4003/ 1.4006
Stainless Steel: 300 Series or 1.4301/1.4401/1.4567
Carbon Steel w/ 1000 hr. Corrosion- Resistant Coating
Substrate Material
Exterior Grade Natural or Treated Wood
Yes***
Yes
Yes**
Plastic or Fiberglass Composites
Yes
Yes
Yes
Aluminum
No
No
Yes
Steel
No
Yes*
Yes #
*Trex Elevations Universal Hidden Fastener are approved **Trex Universal Hidden Fasteners are approved
# Trex Universal Hidden Fasteners for Aluminum Framing are approved ***See Trex recommended fasteners for listing of approved decking screws This guide is for recommended use of fasteners for use with Trex decking. Not all sub-structure materials fall under these categories. In the case of any unique substrate composition of materials, or proprietary composites, consult the substrate manufacturer for recommendations of applicable fasteners.
Transcend ®
DECKING–HIDDEN FASTENERS
Trex Hideaway ® Universal Hidden Fastener/Trex Elevations Universal Hidden Fastener
X
FastenMaster ® TrapEase 3 Ultimate Composite Deck Screw
X
Cortex ® Concealed Fasteners
X
Starborn ® Pro Plug ® System for PVC & Composite (Epoxy Coated & Stainless (2” are approved for sleeper & roof top applications only)
X
KlevaKlip™ Snap-LOC Clip
X
Transcend ®
FASCIA*
Starborn ® Deckfast ® Fascia System – Epoxy Coated* and Headcote ® Stainless
X
SplitStop™ Fascia Screws (uses SplitStop™ Fascia Bit)
X
Cortex ® Hidden Fastening System for Fascia
X
TREX PRODUCT LINES
Refer to au.trex.com, under the Literature/Technical Information for additional recommended fasteners.
Fascia system screws listed above can only be used with composite fascia profiles , and cannot be used with standard thickness decking boards used as fascia. Use stainless steel screws near water applications. If any condition occurs which is attributable to the use of non-recommended fasteners, such condition shall not be covered under Trex’s Limited Warranty.
FastenMaster®, TrapEase® 3, and Cortex® are registered trademarks of OMG, Inc. DeckFast® Fascia System screws are registered trademarks of Starborn Industries Inc. SplitStop™ fascia screws are a registered trademark of Titan Metal Werks, Inc. Trex recommends the use of two screws per joist. All recommended screws are designed to be installed flush with decking surface, DO NOT countersink screws. Use recommended stainless steel screws in any areas near bodies of saltwater.
BUSHFIRE SAFETY REGULATIONS Trex Transcend decking is compliant with bushfire safety regulations for BAL-19 and BAL-29 zones. Refer to https://au.trex.com/trex-owners/downloads and view Trex technical bulletin titled BAL Testing Results under Technical Information, for certain requirements in order to meet these regulations. Please also consult your local council or State building codes for your particular geographical requirements.
NOTE: Construction methods are always improving. Please refer to www.trex.com for the most up-to-date installation requirements.
9
PRESSURE-TREATED FRAMING REQUIREMENTS, GAPPING AND BUTT JOISTS
5 mm (>4.5°C)
3 mm (>4.5°C) 5 mm (<4.5°C)
3 mm (>4.5°C) 5 mm (<4.5°C)
Max. 19 mm
6 mm
Note: a shortened section of joist (verses a full second joist) can also be attached to the main joist (no gap between joists) to serve as the same function as shown here .
NOTES: » This system should not float; it must be attached securely to framing system. » With wood framing, all cut ends should be coated to preserve ends. Refer to local building supplier for what can be used. » When using screws to attach decking to framing, use two screws per every joist. » For added protection to wood framing, use Trex®Protect® Joist and Beam Tape on the top of joists, rim joists, and ledger boards.
Residential <450 mm Commercial: Refer to Span tables on Website
Min. 38 mm
Min. 38 mm
10 NOTE: Construction methods are always improving. Please refer to www.trex.com for the most up-to-date installation requirements.
METAL FRAMING REQUIREMENTS AND GAPPING
Gap decking end-to-end 3 mm (>4.5°C) 5 mm (<4.5°C)
Two screws per joist
Gap decking width-to-width 5 mm
Double joist spacing per manufacturers requiremenrs requirements
19 mm
Adjust end span framing per manufacturers requirments requirements
Perimeter joists
NOTES: » Gapping rules are required when installing Trex decking. » When using an aluminum framing system or other type of metal for sleeper systems, follow manufacturer's instructions for proper installation. » Depending on loading requirements and/or if installing Trex decking on an angle, framing spacing may need to be adjusted. See page 8 for Trex requirements . » Depending on type of structure being used, different types of fasteners must be used for attachment. Refer to the chart located under Recommended Fasteners (page 9) compatible fasteners based on substrate material being used. » When using screws to attach decking to framing, use two screws per every joist.
11
FRAMING AND FASTENING REQUIREMENTS
Fastening Tip for Trex Decking NOTE: When using pneumatic or battery-operated equipment, adjust the pressure so that you only shoot the head of the screw to be flush with the board’s cap. DO NOT shoot the fastener head completely through the shell.
In most cases, install fasteners at a 90° angle (perpendicular to the board).
Clean Cut Boards
At board ends on the deck's edge, you can install screws placed perpendicularly at the recommended distance, at minimum of 25mm from the board end and edge, without splitting the board. For butt joints, where boards meet over a single joist, add a secondary joist or add a short "sister" joist by screwing to the full length joist at the butt joint. This allows screw-in at 90 degrees and allows fasteners to be used at end of each board. ALWAYS ENSURE THAT END OF EACH BOARD IS FULLY RESTING ON ITS OWN FRAMING MEMBER.
5mm
IMPORTANT: You MUST clean cut boards on both ends (min. 5 mm). Composite decking is a great alternative to traditional wood decking. When building your deck and railing, it is recommended that code-approved structural material be used as the framing and joists. Check your local building codes for restrictions. Trex decking cannot be used for structural applications. Do not attach Trex decking directly to any solid surface or watertight system.
Dock Applications Trex decking is approved for all water-contact applications. Boards can be submerged in water for extended periods of time, including multiple times a day with rising tides.
Stainless steel fasteners should be used.
In addition, if there is a great deal of contact between the dock and gasoline, grounding of the dock is also recommended.
12
FRAMING AND FASTENING REQUIREMENTS/ CONTINUED
To ensure an appealing mix of colour tones, mix and match all boards prior to installation. (See inside cover for additional details.)
Installation Tips for Large Temperature Shifts within 24-hour Period
Metal Framing
Wood Framing
For wood framing, and if using Trex Universal Hidden Fasteners, pre-drill and toenail an approved screw at an angle in groove at both ends 25mm from board end and center of each board. For metal framing, use two approved decking screws at board ends.
Routing Square Edge Boards for Trex Hideaway Hidden Fasteners NOTE: All Trex square edge profiles can be routed.
Using a Trex router bit with standard router: 1. Rout from bottom side of board. 2. Rout the entire length of the board, or at every intersection where board is over support joists.
NOTE: Construction methods are always improving. Please refer to www.trex.com for the most up-to-date installation requirements.
13
Installing Trex Decking – Wood Framing NOTE: These instructions should be followed when NOT using the One-Step Tool.
1
2
6mm >4°C 13mm <4°C
2
3
4
3
NOTE: Use scrap piece of decking to help hold fastener in place while attaching.
6
5
3
7
8
14
Installing Trex Decking – Wood Framing/ continued Installing Last Deck Board (Square-Edge Board Recommended)
10
9
25mm
Fascia screws supplied by installer (14x184mm fascia shown) NOTE: Refer to page 20 for detailed fascia attachment instructions .
Route one side of square-edge board to use with hidden fasteners. TIP : Use a recommended hidden fastener screw and plug for last board installation.
Installing Trex Transcend® – Metal Framing NOTE: These instructions should be followed when NOT using the One-Step Tool.
1
Optional First Board Installation: (one screw per every metal joist)
2
*6mm >4˚C 13mm <4˚C
3
2
3
15
Installing Trex Transcend® – Metal Framing/ CONTINUED NOTE: These instructions should be followed when NOT using the One-Step Tool.
4
5
3
7
6
Installing Last Deck Board (Square-Edge Board Recommended)
Optional Fascia Installation
9
8
25mm
Rout one side of square-edge board to use with hidden fasteners.
Fascia screws supplied by installer (14x184mm fascia shown). NOTE: Refer to page 20 for detailed fascia attachment instructions.
NOTE: Construction methods are always improving. Please refer to www.trex.com for the most up-to-date installation requirements.
16
REPLACING TREX DECKING (WOOD OR METAL FRAMING) INSTALLED WITH TREX HIDEAWAY UNIVERSAL FASTENERS
New board at an angle
2
1
Existing Deck
1
Insert Fasteners
3
4
Insert Fasteners
17
SPANNING REQUIREMENTS FOR TREX STAIRS
NOTE: Shown with wood framing.
279 mm min. depth
Stringer
6 mm gapping
19 mm max. overhang
Fasten treads to all stringers
184 mm x 14 mm Riser
Trex fascia or trim
See chart below
Riser removed for clarity
900 mm minimum width – 4 stringers are required Above 900 mm width – stringers at 300 mm centres
MAXIMUM SPACING OF STAIR JOISTS (Centre-to-Centre)
For approved AU spans, refer to https://au.trex.com/trex-owners/downloads/ and view detailed span tables provided by SOTO Engineering located under Evaluation Service Reports.
18 NOTE: Construction methods are always improving. Please refer to www.trex.com for the most up-to-date installation requirements.
INSTALLING TREX STAIR TREADS INSTALLED WITH TREX HIDEAWAY HIDDEN FASTENING SYSTEMS NOTE: Use square-edge, composite decking boards and manually rout these on required sides to allow for use with hidden fasteners.
1
2
F
B
6 mm >4.5°C 13 mm <4.5°C
2
3
4
H
H
5
6
I
A
Rout one side of board (A).
7
19
TREX FASCIA INSTALLATION RECOMMENDATIONS
General Notes: » Trex Fascia utilized around the perimeter of a deck must be gapped with the same requirements as Trex decking to allow for expansion/contraction of the fascia. » When using 50mm x 200mm framing, attach fascia using 2 fascia approved fasteners; when using 50mm x 250mm or larger framing, attach fascia using 3 fascia approved fasteners. Top screw should be placed 25mm from the top of the rim joist, the second screw in the center of the rim joist, and the third screw 25mm from the bottom of the rim joist. » R efer to page 9 for fascia recommended fascia fasteners. WHEN USING APPROVED FASCIA FASTENERS: » A pproved fascia fasteners can only be used with 14x184mm and 14x288mm fascia product and cannot be used with decking products that are being used as fascia trim or stair risers.
NOTE: Wood framing option shown below however same general process would apply for metal framing.
Method 1: Fascia Under Decking ( Note: reflects 14x184mm fascia installation & square-edge decking)
Method 2: Fascia Beside Decking ( Note: spacers below reflect 14x184mm fascia installation) When using this method, attachment of spacers to framing may vary depending on the fascia size. If installing 14x288mm fascia use two screws spaced properly apart so as to not interfere when installing fascia screws.
Decking
Decking
Fascia
Decking
Fascia
Decking
Fascia
Fascia
Spacer
Spacer
Install fascia UNDER decking edges/ends. This will optimize the aesthetics and performance of the installation.
All images shown here reflect fascia under the decking as well as using approved fascia screws.
Install 5mm to 6mm thick x minimum 25mm wide exterior grade spacers (these should be cut the same length as the rim joist), and spaced 228mm on center. Install fascia screws as stated below at spacer locations (ensure that spacer screw does not interfere with fascia screw). TIP: Prior to installing spacers, paint ends black so as these are not as visible (especially when using contrasting colors).
Miter Cut 3mm (>4°C) 5mm (<4°C)
Abutting Gap 6mm (>4°C) 12mm (<4°C)
Gap end-to-end 3mm (>4°C) 5mm (<4°C)
14x288mm Fascia (50x250mm rim joist)
14x184mm" Fascia (50x200mm rim joist)
20
TREX FASCIA INSTALLATION RECOMMENDATIONS
Using Fascia to Box in Stairs Cutting Fascia Method 1: Stair Stringer as Template
2
1a
Fascia
1a. U sing a stair stringer as a template, lay this on the fascia and trace out pattern for stair stringer, ensuring you also factor in stair tread/deck board thickness and riser thickness before cutting. This option is shown above. Proceed to step 3.
2b. Once completed place fascia in proper location and trace around stair treads and risers and then cut to fit. Installing Fascia To Stringers
Method 2: Fascia Beside Decking
1b
3
Fascia
Spacer
1b. A nother option is cutting fascia plumb to the rim joist at the top and flush at the bottom of the stairs as shown.
3. Spacers should be installed like that of standard decking, ensuring these are spaced 225mm apart (see previous page for detailed information on all requirements for spacers).
21 NOTE: Construction methods are always improving. Please refer to www.trex.com for the most up-to-date installation requirements.
TREX FASCIA INSTALLATION RECOMMENDATIONS
Using Fascia to Box in Stairs/ CONTINUED
5
4
Fascia
4. Install appropriate number of recommended fasteners as per pattern shown above, as overall size of fascia after being cut may be smaller than that of the standard size, thus the number of screws used every 450mm may be different in different areas. Ensure screws are installed 25mm from edge of stringer (do not install screws in the end of the stair tread).
5. If the fascia is not wide enough to cover the stair stringer, a secondary piece of fascia may need to be cut accordingly and installed. Install using one recommended fascia fastener on or near the space r.
WHEN USING DECK BOARDS AND COMPOSITE DECKING FASTENERS FOR FASCIA. While Trex prefers the previous methods of attachment for fascia applications, as these are the very best options, there are also other recommendations that can be followed for deck boards being used for fascia. Use two Trex recommended composite decking screws every 300mm" NOTE THAT TREX RECOMMENDED FASCIA APPROVED FASTENERS CANNOT BE USED IN THIS APPLICATION. IN ADDITION ALWAYS refer to manufacturer instructions to ensure that recommended screws can be used for fascia applications. The top screw should be placed 25mm from the top of the rim joist , and the second screw 25mm from the bottom of the rim joist .
**IN ADDITION , also use a weather-resistant, construction-grade adhesive (adhesives that work with wood will work with Trex products) as a SECONDARY fastener when attaching deck boards used for fascia. Remember to wipe away any excess before it dries or is allowed to drip onto other Trex surfaces.
** Weather-resistant Adhesive
All images shown here reflect deck boards used for fascia applications, and using approved composite fasteners for fascia applications.
Miter Cut 3mm (>4°C) 5mm (<4°C)
Abutting Gap 6mm (>4°C) 12mm (<4°C)
Dimensions reflect 25mm from rim joist.
Gap end-to-end 3mm (>4°C) 5mm (<4°C)
NOTE: Adhesive is also required as stated within instructions.
22
DECKING COLOR PALETTE NOT ALL DECKING AND RAILING COLORS ARE AVAILABLE IN YOUR MARKET. PLEASE CHECK WITH YOUR LOCAL MERCHANT TO DETERMINE AVAILABILITY.
ISLAND MIST Transcend®
ISLAND MIST Transcend® Lineage®
TIKI TORCH Transcend®
BISCAYNE Transcend® Lineage®
HAVANA GOLD Transcend®
RAINIER Transcend® Lineage®
HATTERAS Transcend® Lineage®
SPICED RUM Transcend®
LAVA ROCK Transcend®
JASPER Transcend® Lineage®
CARMEL Transcend® Lineage®
ROPE SWING Transcend®
SALT FLAT Transcend® Lineage®
*Our SunComfortable™ products with heat-mitigating technology are designed to be cooler than most other composite decking products of a similar color. Although engineered to be more comfortable, they can still get hot to the touch when direct sunlight and high temperatures converge for extended periods of time. On such days, care should be taken.
HEAT MITIGATING
FRONT: decking: Transcend® Lineage® in Jasper (JA) BACK: decking: Transcend® Lineage® in Rainier (RN)
DECKING | RAILING | LIGHTING | FASCIA | KITCHENS | FURNITURE | PERGOLA | DRAINAGE SPIRAL STAIRS | CORNHOLE | LATTICE | CLADDING | HIDDEN FASTENERS | FENCING
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© 2025 Trex Company, Inc. All rights reserved. Trex®, the Trex logo, TrexPro®, Enhance®, Trex Select®, Transcend®, Lineage®, Trex Signature®, Trex® OutdoorLighting, and Trex Hideaway® are either federally registered trademarks, trademarks or trade dress of Trex Company, Inc., Winchester, Virginia or its licensees.
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