Cove molding isn’t a necessity of life, and many houses are built without the benefit of having cove, crown or cornice molding installed. But installing cove molding adds architectural interest, visual continuity, and improves your home’s insulation. Cove molding joins walls and ceilings with a clean, simple line, creating a seamless transition that works to define a room. Installing cove molding is a relatively simple home improvement project that can add to the beauty and value of your home.

Cove molding is a “Plain Jane” when compared to the ornate cornices and stylish crown moldings that are available in wood, plaster, vinyl and even foam. But when cove molding is installed to join walls to a ceiling, it smoothes out the harsh lines between wall and ceiling and lets the eye continue to move fluidly throughout the room bringing uninterrupted attention to the focal points of the room.

Smaller rooms require thinner trim, and you can tame down an over-sized room with wide, thick molding and prominent cornices. If you have an uneven ceiling, you can find foam replicas of cornices and molding that are adhered with a latex adhesive caulk or nailed down or plaster cornices that are adhered with gypsum adhesive.

Leveling and measuring to ensure exactness are the greatest challenges when installing cove molding. Measure the gaps between the wall and ceiling, and make sure you use a carpenter’s level. You will also want to locate the studs in the room before you start the job. Nailing the molding into the studs keeps the molding firmly attached. When you start installing the cove molding, start in one corner of the room and work your way towards the least noticeable part of the room.

For wood molding, attach it with 2” finish nails. To save yourself from trying to extract needle-thin finish nails, drive the nails in only partially before you countersink them. You should not only double-check your measurements with a level, but you should also get off your ladder or chair, and make sure that the trim is aligned straight. (It wouldn’t hurt to ask for a second opinion.) Once you are confident that the molding is level, countersink the finishing nails, and if you’d like, fill in the nail heads with matching putty. To keep the trim sealed tight, fill in any gaps above or below the lines with sandable and paintable silicone adhesive. You can smooth out the silicone with your fingertip.

Sometimes even the simplest home improvement can make a pronounced difference. If your room needs fluidity, subtle architectural interest, or a tad more insulation – installing cove molding could be the simple home improvement project needed to trim your room to perfection.

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