How to Open Up a Chimney Breast: Step-by-Step Guide

Embarking on a home renovation project can be an exciting journey, and one of the most transformative changes you can make is opening up a chimney breast. This structural element, often found in older homes, can divide rooms and make spaces feel smaller. By removing it, you can create an open, airy living area and enhance the flow of your home. In this guide, we'll walk you through the process of how to open up a chimney breast, from planning to execution.

Before you start, it's crucial to understand that opening up a chimney breast is a significant task that involves structural changes. It's not a DIY project for beginners. You'll need to hire professionals for certain aspects, such as ensuring the structural integrity of your home and dealing with any asbestos that might be present. Always prioritize safety and consult with experts throughout the process.

Planning and Preparation

Before you pick up a sledgehammer, you need to plan your project carefully. This involves more than just visualizing your new, open-plan space. You'll need to consider the structural implications, the potential for hidden surprises, and the legal aspects.

Start by assessing the condition of your chimney breast. Look for any signs of damage or instability. If you're unsure, consult a structural engineer. They can provide a detailed report and advice on how to proceed safely.

Asbestos Consideration

If your home was built before the 1980s, there's a chance it contains asbestos. This material was commonly used in construction until it was banned due to its health risks. Asbestos can be found in chimney breasts, so it's crucial to have your chimney breast tested for asbestos before you start any work.

If asbestos is present, you'll need to hire a licensed asbestos removal company to safely remove it. Never attempt to remove asbestos yourself, as it can release harmful fibers into the air.

Building Regulations and Planning Permission

Opening up a chimney breast is considered a 'controlled' or 'permitted' development, which means you don't usually need planning permission. However, you will need to comply with building regulations. This includes ensuring that the remaining walls are structurally sound and that any new openings are properly supported.

You'll need to submit a building notice or full plans application to your local authority's building control department. They will inspect your work at various stages to ensure it complies with the regulations.

Removing the Chimney Breast

Once you've completed the planning and preparation stages, it's time to start the physical work. This involves carefully removing the chimney breast, supporting the remaining walls, and creating the opening you want.

Before you start, make sure you have all the necessary tools and safety equipment. This includes safety glasses, a dust mask, heavy-duty gloves, and ear protection. You'll also need tools like a sledgehammer, a bolster chisel, a cold chisel, a pry bar, and a drill.

Safety First: Disconnect Services

Before you start demolishing, you need to ensure that any services connected to the chimney breast are disconnected and made safe. This includes gas, electricity, and water supplies. You should also notify your utility companies before you start work, as they may need to come out and disconnect services for you.

Once the services are disconnected, you can start removing the chimney breast. Start by carefully chiseling away the mortar between the bricks. This will help you to remove the bricks without damaging them. You can then use a pry bar to carefully lever the bricks out.

Supporting the Remaining Walls

As you remove the chimney breast, you'll need to support the remaining walls. This is crucial to maintain the structural integrity of your home. You can do this using temporary supports, such as acrow props or steel beams.

It's important to note that you should not remove more than one course of bricks at a time without supporting the walls. This is to prevent the walls from collapsing. Always ensure that the supports are level and secure before you continue with the demolition.

Creating the Opening

Once you've removed the chimney breast, you can start creating the opening you want. This involves cutting out the remaining wall to the size and shape you need. You can use a drill with a masonry bit to make pilot holes, then use a bolster chisel to cut out the bricks.

Remember to leave enough wall on either side of the opening to support the lintel above. The lintel provides support for the wall above the opening, so it's crucial that it's properly installed and supported.

Finishing Touches

With the chimney breast removed and the opening created, you can start thinking about the finishing touches. This involves making good the walls, installing any necessary support structures, and decorating.

Before you start making good the walls, you'll need to ensure that the opening is properly supported. This might involve installing a lintel or a beam to support the wall above the opening. You should also ensure that the remaining walls are properly supported and reinforced.

Making Good the Walls

Once the opening is properly supported, you can start making good the walls. This involves rebuilding any walls that you've demolished and making good any damage to the existing walls.

If you're rebuilding a wall, you'll need to use bricks that match the existing ones as closely as possible. You should also ensure that the wall is properly bonded and aligned with the existing walls.

Decorating and Finishing

With the walls made good, you can start decorating and finishing the space. This might involve plastering the walls, painting or wallpapering, and installing any necessary fixtures and fittings.

Remember to take your time with the finishing touches. This is where you can really make the space your own and create a look that you love.

Opening up a chimney breast can be a challenging but rewarding project. It can transform your home, creating a light, airy space that you'll love to live in. But it's not a project to be undertaken lightly. Always prioritize safety, consult with professionals, and plan carefully before you start. With the right approach, you can create a stunning, open-plan living space that you'll enjoy for years to come.