JoeWoodworker
JoeWoodworker Veneer
The Official Website of this Non-Professional Woodworker ™

Part 1
Introduction

Welcome
Veneering Basics

14 Good Reasons
Vacuum Press Uses
Vacuum Press Options
Overview

Questions & Answers
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Part 2a (Option 1 of 2)
Project: V2 Venturi Press

About Project: V2
Parts List
Build the Manifold
Build the Reservoirs
Assemble the Venturi
Make the Carrier
Wire the Press
Testing and Adjusting
Mods and Options
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Part 2b (Option 2 of 2)
Project: EVS Pump Press

About Project: EVS
Parts List
Pump Selection
Build the Manifold
Build the Sub-Manifold
Build the Reservoirs
Make the Carrier
Final Assembly
Wire the Press
Testing and Adjusting
Mods and Options
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Part 3
Vacuum Bagging

Vacuum Bag Basics
Polyurethane vs. Vinyl
DIY Vacuum Bags (A)
DIY Vacuum Bags (B)
Connect the Bag
Bag Closures
Platens/Cauls
Breather Mesh
Maintenance
DIY Frame Press

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Part 4
Veneer Information

About Veneer
Veneering Myths
Backer Veneer

Veneer Glues
Veneering Tips
Substrate Materials
Flattening Veneers
A Sharp Veneer Saw
Jointing Veneers
Taping Veneers
Dealing with Defects
Curing Glued Panels
Veneering w/o Vacuum
Hammer Veneering
Iron-On Veneering
Veneer Storage
Amazing Bookmatches
Copper Veneer Guide
Paperbacked Veneer

Edgebanding Guide
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Part 5
Miscellaneous Info

Vacuum Forming
Vacuum Chucking
Vacuum Clamping
Vacuum Clamp Matrix
Vacuum Infusing
DIY Vacuum Manifold
Vacuum Press Gallery 1
Vacuum Press Gallery 2
Veneer Quality
Veneering FAQ
Veneer Glue FAQ
The Vac FAQ
Copper Veneer FAQ
Downloads (PDF's)

VeneerSupplies.com

Vacuum Veneering - Tips, Tricks, and More

Substrates for Veneering

A substrate is the material to which a veneer is bonded. With careful preparation and adhesive selection, almost any smooth surface can be veneered. Let's begin this article with one of the most common substrate questions.

"What size should I make my substrate in relation to the veneer?"

When building a veneered panel from scratch, try to avoid having any veneer overhang by simply cutting the substrate larger than the required final panel size. Cut the substrate 1" larger than the required size of the finished panel on all 4 sides. Then lay up the veneer .5" larger than the required size of the finished panel on all sides. Then center the veneer on the substrate after the veneer glue is applied.

After the panel cures, trim the panel to size on the table saw with a plywood crosscutting blade. If the veneer isn't perfectly aligned on the substrate, cut a starting straight edge with a band saw or jig saw and then clean up edges on the table saw.

Example:
Step 1 Required Panel Size 22" x 46"
Step 2 Substrate Size
24" x 48"
Step 3 Veneer Size 23" x 47"
Step 4 Finished Panel Size 22" x 46"


Tips: Trimming Finished Panels
  • Be sure to allow the panel to fully cure before trimming to final size. If the glue has not cured, the veneer may splinter heavily at the cut.
  • To minimize tear out on the face side, set the blade height a little higher than normal and cut the panel with the face side up.

 

Here are some common substrates used with wood veneer.

MDF/MDO (medium density fiberboard/overlay)
MDF is used frequently used on the finest veneered furniture pieces. Its uniformity and stability make it an excellent substrate for veneer work. When using MDF or flake board as a substrate, lightly sand the surface with 80 grit sandpaper to provide a better grip for the glue. To test the substrate, place a drop of water on the surface. If the water keeps a bead shape after ten seconds, it needs more sanding. However, if the water flattens out and is absorbed by the substrate, then it is ready for application of veneer glue.

Plywood
Plywood has the advantage of being lighter, more sag resistant, and it grips fasteners better. It generally does not require any kind of surface preparation prior to applying the glue. There is one caveat of plywood. Shoddy plywood is everywhere these days. The face veneer on these sheets will often peel off with little effort. Check your plywood before veneering it to make sure the veneer face is not loose or poorly bonded. If the veneer peels off easily, it is pointless to apply a nicer veneer over it.

Particle Board
Particle board is also a good veneering substrate but not as fine as MDF. When using particle board as a substrate, lightly sand the surface with 80 grit sandpaper to provide a better grip for the glue. To test the substrate, place a drop of water on the surface. If the water keeps a bead shape after ten seconds, it needs more sanding. However, if the water flattens out and starts to be absorbed by the substrate, then it is ready for application of veneer glue.

Hardwood/Softwood Lumber
The problem with solid wood is that it will expand and contract with seasonal humidity changes in the house. When a solid wood substrate is needed, you'll find that quartersawn or rift cut lumber is ideal since it has less seasonal movement than flat cut lumber. You'll also want to use a hard-setting PPR adhesive like Ultra-Cat. You'll need a vacuum press to clamp the veneer while the glue dries (4 to 6 hours).

Metal
Metal substrates are not porous and therefor require a slightly different process for veneering. Start by adhering a backer grade veneer to the surface using polyurethane glue. When this has cured, you can then apply a face grade veneer to the backer veneer using standard veneer glue. If the project will be subjected to high heat and humidity, you'll want to use a powdered urea resin glue such as Ultra-Cat.

Masonite
The glues used to make it are too thin to maintain a bond between the top surface of the substrate and the veneer. If you apply veneer to Masonite, it is very likely that the veneer will peel off within a short period of time.

Glass
The truth is that there are no adhesives designed for this type of application and finding one that works consistently is not easy. Instead of gluing the veneer onto a substrate like this, consider purchasing a paper-backed veneer with a pressure sensitive adhesive (PSA) backing. With this type of veneer backing, you simply peel the wax paper sheet from back of the veneer and stick it to any non-porous surface. It sounds cheap but it sticks surprisingly well.

Plexiglass or Acrylic
This is a tricky substrate but veneer can be bonded to plexiglass with epoxy as long as the substrate will be supported and not allowed to bend. The key is to scuff sand the substrate material with 100 grit sand paper until it is thoroughly opaque. The tiny grooves created by sanding will give the epoxy a place to "bite".

Drywall
I do not recommend application of paperbacked veneer directly to drywall. Instead, cover the drywall with ½" MDF using construction adhesive. At that point, a paperbacked veneer can be applied to the MDF. Contact cement and PSA are the most commonly used adhesives options.

The PSA backing is an available option on all of the paperbacked veneers at VeneerSupplies.com and is applied to the veneer at the factory. Simply peel off the protective backing and stick it to the project. It works surprisingly well and the bond is as strong as contact cement. To get the best possible bond, apply a coat of shellac (available at most hardware stores) to the drywall before applying the veneer.

Scraper ToolRegardless of the adhesive option you chose, you will need to "set" the bond to the drywall with a scraper tool. Begin at the center of the veneer and work toward the edges in the sequence shown below. This method will prevent bubbles in the veneer and create an excellent bond.

Veneer Scraping Technique

Start in the center and drag the scraper tool in the direction of the arrows. Be sure to pass the tool over each inch of the veneer to get the best possible bond.

Holding A Veneer Scraper

Yes, Joe is a practicing Catholic
The Vac FAQ
Heat Lock Veneer Glue