Why Choose a Picture-Frame Border?
The primary reason to include a picture-frame border is for its visual impact. It defines the deck's edges, offering a clean, finished appearance that can highlight the deck's shape or separate different areas of a larger deck. This detail is often used to conceal exposed ends of the main deck boards, creating a more refined aesthetic.
Beyond aesthetics, a picture-frame border can offer practical benefits. It provides a robust edge, which can be particularly useful for decks with multiple angles or curves, or where the deck transitions to other landscaping elements. It also allows for a consistent fastening method along the perimeter, potentially simplifying installation for the field boards.
Structural Blocking Requirements
Implementing a picture-frame border necessitates specific structural blocking to properly support the perimeter boards. Since these boards run perpendicular to the main joists, they require continuous support along their length. This is typically achieved by installing additional blocking between the joists, flush with the top edge.
For a single picture-frame board, a single line of blocking between joists is usually sufficient. If you plan a double or triple picture frame, additional blocking will be required for each parallel perimeter board. These blocks must be securely fastened to the joists to prevent movement and ensure a stable edge for the decking. Always refer to local building codes and TimberTech's installation guidelines for specific spacing and fastening requirements.
Consider the type and size of the framing lumber for your blocking. It should match or exceed the dimensions of your main joists to provide adequate support. Proper spacing of this blocking is critical for fastener placement and overall deck integrity.
Selecting TimberTech Boards for the Frame
TimberTech offers various decking lines, including Azek (full PVC), Pro (capped composite), and Edge (capped composite). All three lines are compatible with picture-frame designs and share the same fastening systems and fascia program. The choice of board depends on your aesthetic preference, performance requirements, and budget. For instance, Azek PVC boards are impervious to moisture and may be preferred for pool surrounds or ground-contact applications.
You can use the same board profile and color for both the field and the picture frame for a uniform look, or choose a contrasting color or even a different board width to make the frame stand out. TimberTech boards are available in 1x5.5 inch profiles, with grooved options for hidden clips and square-edge options for face fastening or perimeter boards. Lengths typically come in 12, 16, and 20 feet.
When planning, account for the board lengths to minimize waste. The perimeter boards will need to be cut to fit the exact dimensions of your deck, so careful measurement and a cutting plan are essential.
Fascia and Edge Finishes
Fascia boards are crucial for finishing the perimeter of your deck, covering the exposed rim joists and providing a clean, vertical edge. TimberTech offers a coordinated fascia program across all its lines. This means you can select fascia that matches or complements your chosen decking boards, whether they are Azek, Pro, or Edge.
The picture-frame border sits atop the deck frame, and the fascia is installed vertically along the outside edge of the rim joist. Ensure that the fascia material is dimensionally stable and installed according to manufacturer instructions, allowing for proper expansion and contraction. The combination of a picture-frame border and matching fascia creates a truly finished appearance, concealing the substructure from view.
Worked Example: Single Picture-Frame Border
Let's consider a hypothetical deck project: a rectangular deck measuring 10 feet by 12 feet, intended to have a single picture-frame border using TimberTech Azek boards (1" x 5.5" actual dimensions).
For the picture frame, additional blocking is needed. Along the 10-foot sides, we'll run a 5.5-inch wide picture-frame board. This means the main field boards will be 10 feet minus two times 5.5 inches (11 inches total), resulting in a field width of 9 feet 1 inch. Similarly, the main field length will be 12 feet minus 11 inches, or 11 feet 1 inch.
For the 10-foot sides, you will need two 10-foot perimeter boards. For the 12-foot sides, you will need two 12-foot perimeter boards. All these boards will be mitered at the corners for a clean joint.
For material estimation: Perimeter boards: (2 x 10 ft) + (2 x 12 ft) = 44 linear feet of TimberTech Azek boards. Field boards: The 9' 1" x 11' 1" field area requires boards running the 11' 1" length. Round up to 20 boards. Each board needs to be cut to 11 feet 1 inch. If using 12-foot boards, 20 boards will be needed, with offcuts. If using 16 or 20-foot boards, fewer boards might be needed with careful cutting.
This example highlights the need for careful measurement and a detailed cut plan to optimize material usage and ensure structural integrity.
Before you order
- Determine if a single, double, or triple picture frame is desired.
- Sketch the deck layout with exact dimensions, including the picture frame width.
- Calculate the interior field dimensions and the perimeter board lengths.
- Verify the required blocking for the picture frame boards, ensuring it aligns with joist spacing.
- Select TimberTech board line (Azek, Pro, Edge) and color for both frame and field.
- Choose a complementary TimberTech fascia for the deck's vertical edges.
- Confirm fastening system compatibility for both field and frame boards.
- Plan mitered corners for the picture frame boards for a clean finish.
Confirm installation details, approved uses and warranty terms in the current instructions for the exact product and profile. Your installer should verify the substrate, structure and applicable project requirements.
Questions to help you decide
Can I use different TimberTech board types for the picture frame and the main deck?
Yes, you can use different TimberTech board types or colors for the picture frame and the main deck area. For example, you might choose an Azek board for the frame and a Pro series board for the field, provided their thicknesses are compatible. However, it's generally recommended to stick to boards of the same nominal thickness to ensure a flush surface. Always check specific product specifications for exact dimensions.
Do I need special fasteners for picture-frame boards?
Picture-frame boards often use face fasteners, especially if they are square-edge boards or at the very perimeter. If using grooved boards for the frame, hidden clips can be used where the board runs parallel to the joists and blocking. Where the frame boards meet the main field boards, specific starter clips or face fastening might be required. Always follow TimberTech's installation instructions for the approved fastening methods for your chosen board profile and application.
How do I handle corners with a picture-frame border?
For a clean look, picture-frame boards are typically mitered at the corners (e.g., 45-degree cuts for a 90-degree corner). This creates a seamless joint where the boards meet. Precision in cutting is important for tight, professional-looking corners. Ensure adequate support blocking is in place directly under these mitered joints.
Ready to Plan Your TimberTech Picture-Frame Deck?
Request a material quote with your project dimensions, exact TimberTech profile, and ZIP code. We can help confirm current availability and service options for your decking project.
Request a material quote →