Mastic Structure Insulated Vinyl Siding D4, 12'6" Panels, Foam-Backed Insulated Vinyl

Mastic Structure Insulated Vinyl Siding D4 is a foam-backed insulated vinyl siding panel in a 12'6" double 4 profile that wraps the home in a continuous insulation blanket. Expanded polystyrene foam and a rigid substrate add strength, impact resistance and wall R-value. The page covers 8 colors of 12'6" panels sold by box, carton, piece, square or each.

Key Features:

• Continuous insulation: Expanded Polystyrene Foam insulation and a rigid substrate increase the R-value of exterior walls, helping save energy.
• Impact resistance: Dent resistant with up to 300% more impact resistance than standard vinyl.
• Energy savings: High insulating power lowers energy bills, shrinks your carbon footprint, and reduces noise.
• Tight interlocking lock: A uniquely designed lock tightens under pressure so siding stays put even in challenging weather.
• Wood appearance: Wide panels look and feel like traditional wood siding while being easy to maintain.
• Fast installation: Panels grip together for fast, easy installation.

Specifications Table:

Coverage & How Much You Need:

Each 12'6" D4 panel covers a section of wall at the double 4 course exposure; order by square (100 sq ft) for full-house coverage and add 10% for waste and starter/finish courses. Confirm exact per-piece square coverage with your color's packaging since sell units vary by color.

Fit and Compatibility:

Designed as part of the Mastic Structure Home Insulation System and installs over typical exterior wall assemblies; mounting blocks and trim such as Mastic J-Blocks are sold separately to match your chosen color. The two-piece J-Block design also adjusts for use over insulated vinyl siding.

Frequently Asked Questions (FAQ):

Q: What is included in one order?
A: One sell unit of a single color; depending on the color chosen, units are packaged as a box, carton, piece, square or each of 12'6" D4 insulated panels.

Q: How much siding do I need?
A: Measure wall area in square feet, order by the square (100 sq ft) and add roughly 10% for cuts and waste; exact pieces per square depend on the panel exposure.

Q: Will it really save energy?
A: The bonded EPS foam and rigid substrate increase the R-value of exterior walls, which lowers energy bills and reduces noise according to the manufacturer.

Q: Is it dent resistant?
A: Yes, the foam backing and rigid substrate make it dent resistant with up to 300% more impact resistance than standard vinyl.

Q: Can I use accessories with insulated siding?
A: Yes, matching Mastic mounting blocks and trim are available in more than 100 colors and adjust to fit over insulated vinyl siding.

Q: How does it install?
A: Panels grip together for fast installation; the unique lock tightens under pressure to keep siding in place in challenging weather.

Expert Verdict — Reviewed by the SuperArbor Pro Desk

Structure D4 is the right pick when the goal is an insulated, impact-resistant wall system rather than plain hollow-back vinyl; the EPS backing stiffens the wall line and adds R-value. Order by the square for whole-house jobs and keep courses level from a chalked starter strip. Choose a matching Mastic J-Block and trim color so outlets, lights and corners blend into the wall. In hail-prone regions the 300% impact-resistance claim is a real advantage over standard vinyl.

Use fall protection and proper ladder practices when installing siding, and cut panels with a utility knife or shears following the manufacturer's installation guide and local building codes.

Order Mastic Structure Insulated Vinyl Siding D4 in your color today and start building a warmer, quieter, more impact-resistant exterior.