Elena Rossi
Building a box frame for a painting is a simple and rewarding project. The process involves cutting four pieces of wood to size, joining them together at the corners, and then finishing the frame with paint or varnish. The frame can then be attached to a canvas or other artwork, with the option of creating a floating effect by leaving a gap between the canvas and the frame. This project can be completed using basic tools such as a miter saw, nail gun, and table saw, and the cost can be kept low by using scrap wood.
| Characteristics | Values |
|---|---|
| Number of pieces of wood | 4 |
| Angle of corners | 45° |
| Type of glue | Wood glue |
| Type of nails | Finish nails |
| Number of nails per corner | 2-3 |
| Type of filler | Wood filler |
| Type of sandpaper | 220-grit sandpaper |
| Number of coats of paint | 2 |
| Type of glass | Non-glare glass |
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What You'll Learn
Choosing the right type of wood
When choosing the right type of wood for your painting's box frame, there are several factors to consider. Firstly, decide on the overall look and feel you wish to achieve. The type of wood you choose will significantly impact the aesthetics of the finished product. Hardwood and softwood are the two primary categories of wood used in frames, each with distinct characteristics. Hardwoods, derived from broad-leaved trees, are typically slower-growing and have a higher density, making them strong and durable. They are often used for framed prints due to their rich grain patterns and customisation versatility. Deciduous varieties of hardwoods are particularly popular for framed prints. On the other hand, softwoods, also known as coniferous woods, come from evergreen trees such as pine, spruce, and cedar. They are generally less expensive, lighter in colour, easier to work with, and have distinctive grain patterns, making them a versatile option for rustic or neutral-looking frames.
Pine and poplar are excellent choices for beginners as they are widely available, affordable, and easy to work with. They take paint well, allowing for a variety of finishes, although their softer nature makes them more susceptible to dents and scratches. If you are looking for a timeless and customisable option, oak is an excellent choice. Oak frames can be stained, painted, oiled, waxed, or left unfinished to showcase the natural beauty of the wood. Walnut is another popular choice due to its varying colour, dense strength, and unique grain patterns. The colour of walnut can range from pale brown to dark chocolate brown, and its grain patterns can be straight or wavy, adding visual interest to your frame.
If you are looking for a lightweight yet durable option, painted Obeche wood is a suitable choice. This type of wood is often used for black, white, and grey picture frames. When choosing the right wood for your box frame, consider the desired aesthetics, durability, workability, and affordability. Additionally, keep in mind that you can use just about any type of wood, and with the right techniques and finishes, you can create a beautiful and rewarding DIY box frame for your painting.
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Cutting the wood to size
To build a box frame for a painting, you will need four pieces of wood cut to size. The size of the wood will depend on the dimensions of your canvas and the desired gap between the canvas and the frame.
For a regular canvas frame, the wood should match the dimensions of your canvas. If you are creating a float frame, which has a gap between the canvas and the frame, you will need to add the desired gap width and the thickness of your wood to the length and width of your canvas. For example, if you want a 1/8" gap around your canvas and your wood is 3/4" thick, you should add 1/4" to the length and width of your canvas, plus the thickness of your wood (3/4" x 2).
Once you have determined the size of your wood pieces, use a miter saw to cut them to the desired length with a 45-degree angle at each end. This will ensure that your corners fit together neatly.
If you do not have access to a miter saw, you can also use a chop saw to cut the wood to length and then use a mitre box to create the 45-degree angle at each end.
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Joining the corners
Firstly, ensure that you have four pieces of wood with precise 45-degree angle cuts at the ends. This will enable the pieces to fit together neatly at the corners. You can achieve accurate cuts by using a mitre box.
Next, apply wood glue to the mitred ends. Spread the glue evenly and generously to ensure a strong bond. Then, fit the pieces together, forming a rectangular frame with joined corners.
To reinforce the joints, use a picture frame clamp to hold the sides square while the glue dries. Additionally, you can use staples or headless tacks. If using staples, remember to remove them once the glue is dry. For headless tacks, make sure to hammer them into the surface so that they are flush.
For added strength, you can also attach corner braces. Cut the braces from scrap wood, ensuring they have opposing 45-degree angles on each end. Flush the braces with the back of the frame and insert a finish nail at an angle into each end. Don't forget to use wood glue for extra security.
Finally, fill any visible nail holes or gaps with wood filler. Sand the entire frame for a smooth finish, and then apply paint or stain to achieve the desired look for your box frame.
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Securing the frame
To secure the frame, you can use wood glue and nails. If you are using nails, a nail gun can be helpful. You can also use headless tacks, but these will need to be hammered in so that they do not stand out from the surface. A picture frame clamp can be used to hold the sides square while the glue sets.
For a floating frame, you can use wood glue and finish nails, with two nails per corner. You can also use corner braces, attaching them with wood glue and a nail at an angle into each end. If you are using corner braces, you can paint them to hide them, or cover the gap with dark tape or paper.
To secure the artwork inside the frame, you can use nails hammered straight through the side of the frame and into the edge of the artwork. Fill in the nail holes with wood filler and touch up with paint.
If you are using glass, slide this into the three-sided assembly and attach the fourth side with wood glue and nails.
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Finishing the frame
Once you have assembled your box frame, you can finish it in a number of ways. One option is to stain the frame with a colour of your choice. You can also paint the frame, applying two coats of paint and sanding between coats with 220-grit sandpaper for a smooth finish.
If you have used nails to assemble the frame, you can fill the nail holes with wood filler and then touch up with paint. You can also use headless tacks, which need to be hammered into the surface so they do not stand proud. Alternatively, you can use wood glue to assemble the frame, and then use a staple gun to hold the corners together while the glue dries.
If you are creating a floating frame, you will need to place the canvas back into the finished frame, using spacers to evenly centre it. You can then hammer finish nails through the back of the frame to secure the canvas.
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Frequently asked questions
You will need wood, a saw, a mitre box, a picture frame clamp, wood glue, nails, sandpaper, and paint.
You need four pieces of wood with a precise 45-degree angle. A mitre box will ensure your corners are cut at 45 degrees.
Use wood glue to stick the pieces together. You can also use headless tacks or staples to hold the pieces together while the glue dries.
Fill any nail holes and mitered joints with wood filler, then sand the whole thing smooth. You can then paint the frame.
Slide the glass and painting into the three-sided assembly and attach the fourth side. Secure the artwork by nailing straight through the side of the frame and into the edge of the artwork.
