Hey everyone! I'm currently working on a big veneering project using moisture resistant MDF (the green stuff). I've heard that it's usually necessary to balance veneer by applying it to both sides or using a balancer on the opposite side. But I'm curious if this rule still applies to MR MDF since it shouldn't absorb moisture from glue, right? Most of my units are quite large, around 2.8 meters tall, and I'm using non-backed veneers like 1-2mm eucalyptus or birch, and a darker one that they call 'lolo'. What do you all think?
4 Answers
It's not just about moisture; you have to think about tension too. I once veneered hydro MDF on one side only and it actually cupped, and that was on a smaller board! Best to avoid that issue altogether.
Adding layers to any sheet goods introduces tension, which you need to account for. For MDF, having a face along with a balancer gives you a solid three-layer structure, which is typically what you want. Balancing has been a go-to method in veneering for ages.
Every veneered material should ideally be balanced unless it’s something as solid as thick steel. Any bending point could lead to problems if it's unbalanced. If you can get creative with your design, you might skip balancing, but you'd need to install it carefully and make sure both sides have proper fixings to prevent warping. Honestly, it seems risky not to balance—consider using a cheaper veneer on the back just in case.
I had a bad experience with exterior-grade MDF; it bowed significantly after cutting, and I can only imagine how much worse it would get if veneered on just one side. Sometimes it feels redundant to use MR MDF since the edges are going to be covered anyway and finished to resist moisture.
Totally hear you! The balancing seems like extra hassle, but the tension issue is real. It’s always better to be safe than sorry!