Simple Shower Surround Trim Moulding Install Guide

Upgrading a tired, dated shower surround with new trim molding can make a dramatic difference in your bathroom's style. The addition of trim transforms basic shower walls into a custom-looking design feature. Trim also solves many shower issues, hiding imperfections, gaps, and seams while providing protection from moisture damage.

Installing shower surround trim moulding is an affordable weekend DIY project that can give your bathroom a fresh facelift. With some basic tools, measurements, and materials, you can add this finishing touch to maximize the look of your shower and protect it for the long term.

Benefits of Adding Trim Moulding to Shower Surrounds

Trim moulding offers numerous benefits for showers and tub surrounds:

• Modernizes the look of outdated tile or fiberglass surrounds
• Increases home value by improving shower appearance
• Hides gaps, cracks, and imperfections in existing walls
• Creates a custom built-in look for a fraction of the cost
• Protects vulnerable edges and corners from water damage
• Offers an affordable bathroom upgrade option
• Easy to install for DIYers with basic skills
• Elevates the style of your bathroom with designer details

Whether you want to update your outdated tub/shower surround or refresh your bathroom's look, adding trim moulding offers big benefits.

How to Measure for Shower Surround Trim

Once you decide to install shower trim moulding, the first step is to measure your space. Taking accurate measurements ensures you purchase enough linear feet of moulding.

Consider the following when measuring:

• Measure around the entire perimeter of the shower walls
• Account for any irregular edges like shower niches and built-in benches
• Note the height and width of any windows or doors in the shower surround
• Calculate the total linear feet for all sides, including the ceiling
• Order 10-15% extra to allow for mistakes and irregular edges

Measure carefully, especially around rounded neo-angle showers. Calculate both the inner and outer edges around curved surfaces. For accuracy, have another person double check measurements.

Selecting Moulding Materials and Profiles

Today's trim moulding comes in a range of materials, sizes, and profiles to suit any shower or tub surround.

Popular Trim Materials

• PVC - moisture-resistant, budget-friendly option
• Polyurethane - durable and flexible material
• Wood composites - mimics woodgrain look
• Solid surface - matches solid surface shower walls

Key Factors in Choosing Trim

• Moisture resistance
• Thickness that matches existing tile or surround
• Preferred edge profile and shape
• Color/finish that matches your bathroom
• Budget constraints

Popular Trim Profiles

• Bullnose - rounded smooth edge
• Cove - concave shaped groove
• Crown - regal triangular upper edge
• Quarter-round - rounded L-shape

Many trim options are available to match your bathroom's look and style.

Installation Tips and Techniques

Installing shower surround trim moulding takes careful measuring, cutting, and nailing. Follow these tips for best results:

1. Remove existing caulk from shower walls
2. Set miter saw blade to a 45 degree angle
3. Measure and cut trim pieces to fit each wall
4. Use construction adhesive to affix to shower walls
5. Secure trim with finish nails every 16 inches
6. Fill nail holes and gaps with silicone caulk
7. Prime and paint trim as needed to match

Miter inside and outside corners carefully for a professional finish. Allow adhesive and caulk to fully cure before using shower. Take your time for best results.

Cutting Tips

• Use a miter saw or a circular saw with a finishing blade for smooth cuts.
• Mark trim pieces to keep track of inside vs. outside edges.
• Cut slowly and carefully to avoid jagged edges.
• Apply painter's tape to the shower wall as a guide while cutting.

Nailing Tips

• Pre-drill holes to prevent cracking trim when nailing.
• Use a nail set to countersink nails and fill over.
• Nail into wood blocking or studs for strongest hold.
• Nail every 12-16 inches around perimeter edges.

Patience and care during cutting and installation prevents headaches down the road. Take your time to measure twice and cut once.

Post-Installation Care and Maintenance

Trim moulding requires occasional cleaning and inspection to keep it looking fresh and prevent water damage.

• Clean trim with a non-abrasive bathroom cleaner and soft cloth.
• Avoid harsh cleansers, wire brushes, or abrasive pads.
• Re-caulk at any sign of shrinking or gaps in caulk.
• Inspect for cracks or loose areas, re-nailing as needed.
• Touch up paint nicks immediately to avoid moisture access.
• Replace trim pieces if extensive water damage occurs.

With proper installation and care, shower surround trim moulding adds beauty and protection that can last for many years.

Choosing the Right Caulk

For best waterproofing, use a flexible silicone caulk between the trim moulding and shower walls. Look for a caulk that:

• Is mold and mildew resistant
• Offers long-lasting flexibility
• Adheres well to wet surfaces
• Matches your grout color

A high-quality caulk creates a watertight seal that prevents moisture damage behind the trim.

PVC vs. Polyurethane Trim

PVC and polyurethane are two popular trim materials:

• PVC - budget option, limited color/style choices
• Polyurethane - more premium look, more color options

Polyurethane costs more but offers greater durability and accuracy of woodgrain patterns. PVC is cheaper but can look obviously artificial upon close inspection.

Preventing Backward Angles

It's easy to cut trim molding angles backward. To prevent this:

• Always mark the back/bottom edge of trim pieces before cutting.
• Take your time and cut slowly for accuracy.
• Use a combination square to double check angles.

Patience and care prevents incorrect angles that won't fit together properly. Measure twice, cut once.