Deck Fascia Board Installation With TOPLoc™ Fasteners

Looking for guidance on how to install the deck fascia board to your composite deck? You've come to the right place.

A DECK FASCIA BOARD is the board that runs around the perimeter of the deck for a seamless look. Fascia covers the wood perimeter joist of the deck frame and is sometimes called "rim joist cover."

BEFORE YOU BEGIN, make sure you've properly blocked and spaced your deck joists and that your deck's substructure is healthy. Please consult all appropriate installation guides.

WHAT TO KNOW BEFORE YOU BUILD

Design Details >

This guide provides instruction on how to properly install fascia for a polished aesthetic.

Fascia Details >

The fascia boards will be installed flush with the deck boards to cover the ends.

TimberTech Fascia Installation Guide

Estimated based on a 12' x 12' deck; time will vary depending on the size of deck and complexity of the build.

ESTIMATED TIME: 1 Hour

RECOMMENDED MAN-POWER: 1-2 People

PREREQUISITES: Secured framing, properly attached to the house. A confirmed deck design. Deck boards installed correctly.

OVERVIEW

TOOLS TO INSTALL

  • T20 driver bit (included)
  • Level
  • Tape Measure
  • Saw

CHECK YOUR DECK
Do not move forward until you've confirmed your deck frame is structurally sound.

Step 1: Choose the Right TOPLoc Fasteners for Your Build

TimberTech composite decking products are highly durable and require the use of high-quality deck fasteners. For best deck fascia board results, use the TOPLoc fascia fastening product developed for the specific decking line you chose (capped polymer or capped composite). Both TOPLoc for PRO & EDGE fascia fasteners and TOPLoc for AZEK fascia fasteners are color-matched for a seamless look.

Fastener TOPLoc Fascia All Colors TimberTech

TOPLoc for PRO® & EDGE®

Use TOPLoc for PRO & EDGE hidden fascia fasteners and TOPLoc fascia drill bit (sold separately). 

Fastener TOPLoc AZEK Multicolor TimberTech Fascia

TOPLoc for AZEK®

Use TOPLoc for AZEK hidden fascia fasteners and TOPLoc fascia drill bit (sold separately). 

Step 2 - Option A: Install TimberTech AZEK Fascia Boards

Note: If you built your deck using TimberTech PRO or TimberTech EDGE deck boards, skip to Step 2 - Option B.

How to Install TimberTech AZEK Decking Fascia Adhesive

1. Apply Adhesive

Apply a good-quality exterior-grade construction adhesive to the back (smooth) surface of the board. Do not get adhesive on the grained surface of the rim joist or decking.

Install TimberTech AZEK Decking Fascia Board Flush

2. Position the Board

Position the board so it is flush with the top of the deck boards.

Install TimberTech AZEK Decking Fascia Board Spacing

3. Fasten

Install three fasteners from top to bottom, with top and bottom screws positioned no more than ½” from the end. The third screw should be approximately centered in the board. Repeat this configuration every 12”.

CAPPED POLYMER FASCIA FASTENING BEST PRACTICES

TimberTech AZEK Deck building 12 inch max

As You Install TimberTech AZEK Fascia Boards

  • Maintain no more than 12" between fasteners as you apply the fascia boards. 
  • Each fastener must be in full contact with the edge of the fascia board, with the screw holding the fastener down tight to the board.
Fascia Fastening Rip Cut

Position and Rip-Cut as Needed

  • Measure the length of the outside rim joist to determine the length of AZEK fascia board needed. 
  • It may be necessary to rip-cut the fascia board to fit the outside rim board of the deck. A slight overhang is permitted, with the goal being to hide the wood rim joist.

Step 2 - Option B: Install TimberTech PRO or EDGE Fascia Boards

Position-Your-Fascia-Board

1. Position Your Board

Position the fascia board so it is flush with the top of the deck boards.

Pre-Drill-Fascia

2. Pre-Drill

Pre-drill 2” from the top and bottom, alternating between the two at a maximum of 12”. Do not drive fasteners into ends or edge of deck boards or splitting of deck board can occur.

TimberTech-Fascia-Pre-Drill

3. Drive the Fasteners

Fasten in the pattern described above, working in one direction.

CAPPED COMPOSITE FASCIA FASTENING BEST PRACTICES

Fascia Installation Best Practices

Ensure Proper Connection

  • Each fastener must be in full contact with the edge of the fascia board, with the screw holding the fastener down tight to the board.
  • Install three fasteners from top to bottom. Top and bottom fasteners should be 1/2" from the edge, and the third screw centered.
  • Repeat this configuration every 12."
  • Continue fastening in the pattern described above, working left to right or right to left. This will ensure flatness in the fascia.
Fascia Fastening Rip Cut

Position and Rip-Cut as Needed

  • Measure the length of the outside rim joist to determine the lengthEnsure Proper Connection of PRO or EDGE fascia board.
  • It may be necessary to rip-cut the fascia board to fit the outside rim board of the deck. A slight overhang is permitted, with the goal being to hide the wood rim joist.
  • If the fascia or rim board requires "ripping down," make sure that the cut edge is positioned down, not up, which exposes the core material.
  • Place factory edge / cap stock edge up and flush with the deck surface.
NOTE

The techniques shown should be used for best results. Results may vary, as expansion and contraction could still occur. AZEK Building Products Inc. claims no liability or responsibility for the improper installation of this product. Since all installations are unique, it is the sole responsibility of the installer to determine specific requirements in regard to each decking application. AZEK Building Products recommends that all designs be reviewed by a licensed architect, engineer or local building official before installation. Please contact AZEK Customer Service prior to installing if you have question or concerns.

DO NOT COMPLETELY TORQUE DOWN THE FASTENER
The screw should serve as a hanging mechanism to allow for expansion and contraction in the fascia.



Find the Right Fascia Fastener

Choose TOPLoc for PRO & EDGE, or TOPLoc for AZEK, hidden fascia fasteners. Color-matched to polish the overall look and feel of your deck.

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