How to place the Cornice (the molding on top of tall cabinets and tall boxes). It is best to cut and fit the longest piece first in case a mistake is made, as you can then try again with a new piece and cut the wrong size piece into smaller pieces.
To cut the Cornice and Pelmet it is recommended to use a good quality miter saw. These can be rented or you can buy your own as they are very useful if you are practical minded. These machines, like all power tools, must be used with care to ensure your safety and the long life of the machine. Never try to cut too much at one time. The sound of the engine will tell you if you are being too harsh on it.
Care must be taken when measuring because the cornice usually overhangs units and doors, so this must be taken into account when measuring. Take a piece of cornice and place it on top of the wall unit to see how much overhang you want. It may be advisable to temporarily hang a door so you can get a better idea of what it looks like.
Whenever possible, try to cut the correct angle at one end first, and then fit the entire length into place. Drive a screw into the end to secure it in place while moving to the other end to carefully score the cornice lengthwise. Then go back and remove the screw and cut the piece to size.
The cornice is best attached to the top of the cabinets by drilling holes in the cornice every 300mm or so. If there is little or no access above the cornice to reach the screws, drill the holes through the top of the cabinets.
Tip: If there is enough rake, try cutting a length up in the same order they go around the units so that the grain matches up at the miter. Obviously, when you start a new length, the grain of the wood cornice may not match, but you can take a look at all the pieces you have and lay them end to end and swap them around to give the best continuity of color and grain.
When you have placed the first piece, measure the approximate length of the next piece and cut the corresponding angle in it. If it’s okay, go to the opposite end and mark it lengthwise. When the cornice is ready to be attached, drill holes in the bottom being careful that the holes sit on top of the wall unit and not on the edge or are missing from the unit entirely.
Now put a good quality PVA adhesive on the joint and push it in place.
When the seam is properly aligned and clean, hold it in position with 20mm tape and then screw the cornice into place.
Sometimes the screw closest to the joint can move the joint when fully tightened, so in that situation just back off the screw a bit and tighten it later when the glue has dried.
The glue usually dries in 30 minutes, but leave it on as long as possible or overnight.
The next job is to place the Light Pelmet, which is the molding placed under the wall units that traditionally, as its name suggests, shields the lights that are placed under the wall units.
Often when the valance has been installed and the lights are on, light can shine through the gap between the bottom of the wall unit and the top of the valance. This can be resolved by using a dark silicone or caulk behind the trim where it meets the wall unit.
When fixing the valance there are two ways to do it depending on the profile of the molding.
If it is an L-shaped moulding, fixing can be done via the L extension piece. Care must be taken when selecting the length of the screws.
If the trim is single profile, it should be attached down through the bottom of the cabinets.
If the tiling is going to be done in the same way as the kitchen, it is best to place the Pelmet on the fronts and then cut all the returns that go back to the wall but do not fit.
Do all tiling and grouting before trimming and placing returns. On some types of valances it is not possible to screw the returns down so it is best to secure them by running clear silicone along the top of the valance and putting a good quality adhesive on the joint and pushing it into place.
The silicone will hold the Pelmet as long as the seam is properly aligned, cleaned and sealed with 20mm tape. The glue usually dries in 30 minutes, but leave it on as long as possible or overnight.