Underlayment Plywood
Coastal produces underlayment panels as defined in US Product Standard PS1-09 for Construction and Industrial Plywood. Underlayment plywood is specially constructed for installation in flooring applications where puncture resistance is a requirement. These panels are designed with thicker face veneer and/or limited voids in the ply beneath the face. Our 19/32 and 23/32 Performance Category thicknesses are produced with Group 1 Southern Yellow Pine veneers and carry the “STURD-I-FLOOR” designation with the accompanying Span Ratings for single-layer floor construction. The glue bond classification of our Underlayment is Exposure 1.
We offer 19/32 and 23/32 underlayment in both Square Edge and Tongue & Groove panels. Our underlayment grades are also available in Structural-1 specifications and grademark. Please contact the sales office for special orders.
Download Underlayment Plywood Spec Sheet 
| Production Item | Performance Category | #Plys | Pcs/Unit | Span Rating | Construction Layup | Notes |
| Underlayment | 11/32 15/32 |
3 4 |
88 70 |
C Plugged Face D Back D Inner plies |
Our BC panels are approved for Underlayment | |
| Underlayment STURD-I-FLOOR |
19/32 23/32 |
4 5 |
56 46 |
20oc 24oc |
C Plugged face C veneer under face D Back D inner plies |
Available in square edge and T & G
Structural-1 is also available by special order |
See our Policies page for safety and warranty information.