Installing insulation behind wall or ceiling panels—often called backloading—can improve energy efficiency, soundproofing, and thermal performance. Trusscore offers two durable ceiling panel options designed to handle insulation safely: Wall&CeilingBoard and RibCore. The following guidelines help ensure proper installation, prevent panel deflection, and maintain long-term performance.
Trusscore Wall&CeilingBoard is engineered to accommodate common insulation types used in residential applications. It supports high R-value insulation behind panels without visible deflection, making it ideal for energy-efficient wall and ceiling systems.
16" joist spans can support insulation up to R80 with no visible deflection.
For 24" and 48" joist spans, refer to the tables below for expected panel deflection based on insulation type and R-value. Values assume dry conditions and may vary if exposed to moisture.
R | 24" Span | 48" Span |
10 | 0.037" | 0.075" |
20 | 0.042" | 0.093" |
30 | 0.046" | 0.111" |
40 | 0.051" | 0.129" |
50 | 0.056" | 0.147" |
60 | 0.061" | 0.165" |
70 | 0.061" | 0.183" |
80 | 0.061" | 0.200" |
R | 24" Span | 48" Span |
10 | 0.036" | 0.074" |
20 | 0.043" | 0.096" |
30 | 0.049" | 0.118" |
40 | 0.055" | 0.140" |
50 | 0.061" | 0.162" |
60 | 0.067" | 0.184" |
70 | 0.073" | 0.206" |
80 | 0.079" | 0.228" |
R | 24" Span | 48" Span |
10 | 0.044" | 0.102" |
20 | 0.057" | 0.148" |
30 | 0.069" | 0.193" |
40 | 0.081" | 0.238" |
50 | 0.093" | 0.283" |
60 | 0.106" | 0.328" |
70 | 0.118" | 0.373" |
80 | 0.130" | 0.418" |
R | 24" Span | 48" Span |
10 | 0.048" | 0.117" |
20 | 0.064" | 0.175" |
30 | 0.080" | 0.234" |
40 | 0.096" | 0.292" |
50 | 0.112" | 0.351" |
60 | 0.128" | 0.409" |
70 | 0.144" | 0.468" |
80 | 0.160" | 0.526" |
RibCore is a high-strength PVC corrugated panel suitable for agricultural, commercial, industrial, and residential applications. Like Wall&CeilingBoard, it supports insulation installed behind panels for improved thermal and acoustic performance.
Use the table below to determine expected panel deflection based on insulation weight across 24" and 48" joist spans.
3" RibCore Panel Deflection (mm/in) with 3 screws along joist:
Weight of Insulation (lb/ft²) | 24" On-Center Joist Spacing | 48" On-Center Joist Spacing |
0.50 | 2.05 mm / 0.081 in | 2.92 mm / 0.115 in |
0.67 | 2.24 mm / 0.088 in | 4.43 mm / 0.174 in |
0.83 | 2.69 mm / 0.106 in | 5.26 mm / 0.207 in |
1.00 | 2.98 mm / 0.117 in | 6.04 mm / 0.238 in |
1.50 | 4.29 mm / 0.169 in | 8.62 mm / 0.339 in |
