In our Casework Spec, we can choose between a Combination Core and a MDF Core.
Are intent is to provide a “Premium” cabinet for our client.
Are either of these two cores more “Premium” than the other?
Thanks
Are you using the Architectural Woodwork Standards (AWS) from AWI? That should differentiate between Economy, Custom and Premium standards.
If I’m reading the Architectural Woodwork Standards (AWS) correctly, for “Premium” grade sheet products the core is at the option of the shop unless the specifications identify a specific core material.
A combination core uses waferboard or OSB, and a composite core uses MDF or particleboard.
Per the AWS, MDF has a better edge than a combination core, but a combination core has better screw holding and bending strength performance. The AWS also states that a combination core has limited availability, whereas MDF is readily available.
It also depends on the finish. the “combination core” may be OK for plastic laminate, but I would be surprised if it would be appropriate for wood veneer.
Thanks for the comments
I think you want the MDF core throughout - you may not notice the difference for the plastic laminate face, but you will notice it for the interior face, and at the edge.
From the perspective of AWI, both MDF and Particleboard are equally acceptable for casework construction. You can look at the table 04-007 on pp. 74 of the AWS Edition 2, 2014 for relative comparisons. One issue to note, doors and drawer fronts constructed of lumber core, veneer core, or OSB will not be guaranteed against warping or delamination per the standards. Please feel free to contact me if I can be of further assistance. - Ashley Goodin, AWI Technical Services Manager
I have Edition 1 2009. Where would this table be located?
When comparing MDF and Particleboard, it’s important to consider the grade. The lower grade of MDF, Grade 115, is not better than Grade M-2 Particleboard as far as screw holding and strength are concerned, while Grade 130 MDF has similar screw holding values with a higher Modulus of Elasticity and Modulus of Rupture. Grade 155 MDF is substantially stronger than Particleboard, with greater screw holding power as well.
Combination core panels most often use veneer core plywood for the core (OSB or other materials are sometimes used as well), with MDF for the face layers. This provides a stronger product while keeping a smooth face that is suitable for veneer or laminate. However, it shares regular veneer core plywood’s susceptibility to warping.
The table referenced in the AWS is on page 457 in the appendix of the first edition (2009). Mitch Taylor, Woodwork Institute DAS
Thanks for the reference