How To Fit Hollow Soffit Board

How to Fit Hollow Soffit Board

Fitting a hollow soffit board is a task that can be carried out by any competent DIY enthusiast with the right tools and guidance. In this article, we will provide you with a step-by-step guide on how to fit a hollow soffit board and enhance the appearance of your home’s exterior.

What is a Hollow Soffit Board?

Before we delve into the fitting process, it’s important to understand what exactly a hollow soffit board is. A soffit board is the underside of any construction element such as the eaves, roof, or arch.

A hollow soffit board is made of lightweight PVC material with a hollow core. It is often used as a covering for the eaves of a house or as a decorative element. Hollow soffit boards have a smooth and durable surface that requires minimal maintenance, making them an attractive choice for many homeowners.

Materials and Tools Needed

To get started, gather the following materials and tools:

  • Hollow soffit boards
  • Stainless steel screws
  • Soffit fixings
  • Screwdriver or drill with appropriate drill bits
  • Tape measure
  • Pencil or marker
  • Saw or PVC shears
  • A sturdy ladder or scaffolding

Step-by-Step Guide

Step 1: Measurements and Planning

Start by measuring the length and width of the area where you want to fit the hollow soffit board. This will help you determine the number of boards you need and their dimensions.

Next, plan the layout, keeping in mind any joints or corners where the soffit boards will be connected. It’s best to have continuous lengths along the eaves, minimizing the need for extra joints.

Step 2: Cutting the Hollow Soffit Boards

With your measurements in hand, carefully mark the dimensions on the back of the hollow soffit board using a pencil or marker.

Using a saw or PVC shears, cut the board along the marked lines. Make sure to wear appropriate safety gear, such as goggles and gloves, when cutting the boards.

Step 3: Attaching the Boards

Position a ladder or scaffolding below the area where you’ll be attaching the soffit board. Ensure the platform is steady and secure before climbing up.

Place the first hollow soffit board against the underside of the construction element, aligning it with the outer edge. Use a screwdriver or drill to fix the board into place using stainless steel screws.

Continue fitting the remaining boards, ensuring they fit securely and snugly together. Use soffit fixings wherever necessary to provide additional support and stability.

Step 4: Finishing Touches

Once all the boards are fitted, take a moment to inspect the installation. Ensure each board is tightly secured and flush with adjacent boards.

If any gaps or small imperfections are present, you can use filler specifically designed for PVC to fill them. After applying the filler, smooth it out with a putty knife to achieve a seamless appearance.

If desired, you can also paint the soffit boards using a suitable outdoor paint. Be sure to choose a paint that is compatible with PVC materials and follow the manufacturer’s instructions.


Fitting a hollow soffit board is a relatively straightforward process that can greatly enhance the aesthetic appeal of your home. By following the steps outlined in this guide, you can confidently install your own hollow soffit boards, transforming the look of your property’s exterior while also providing functional benefits such as better ventilation and protection against the elements.

Remember, if you are unsure about any steps or lack the necessary tools, it’s always best to consult a professional. Happy fitting!

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