• How to Insulate a Cold Wall from the Inside

    | by Holly Wood

    Are you tired of feeling the chill from your cold walls, or dreading those skyrocketing heating bills during the winter? Insulating a cold wall from the inside can be a game-changer when it comes to improving the energy efficiency and comfort of your home.

    In this comprehensive guide, we will explore various methods and materials for insulating internal walls effectively. Whether you have solid walls, cavity walls, or stud walls, we’ve got you covered.

    Understanding the Importance of Wall Insulation

    Before we jump into the step-by-step process of insulating a cold wall from the inside, let’s briefly discuss why it matters.

    Proper insulation helps reduce heat loss, making your home more energy-efficient. It also prevents cold surfaces and condensation, creating a comfortable and healthy living environment.

    Now, let’s explore the different insulation options available.

    Types of Wall Insulation

    1. Cavity Wall Insulation: If your home has cavity walls (two layers of brick with a gap in between), cavity wall insulation involves injecting insulating material into the gap to prevent heat loss.
    2. Internal Wall Insulation: Internal solid wall insulation involves adding insulation materials to the interior walls of your home. It’s an ideal solution for homes with solid walls or where external insulation isn’t feasible.
    3. External Wall Insulation: In contrast to internal insulation, external wall insulation adds a layer of insulation to the exterior of your home. It’s effective for solid walls, but it can alter the appearance of your house.
    4. Stud Wall Insulation: If your home has stud walls, these are walls with a wooden or metal frame, and insulation, such as mineral wool fibre, can be added between the studs to improve energy efficiency.

    Choosing the Right Insulation Materials

    When insulating your interior walls, you have a variety of insulation materials to choose from:

    • Rigid Insulation Boards: These are solid, dense boards made from materials like foam or fibreglass. They offer excellent thermal insulation properties.
    • Natural Insulation Materials: For those looking for eco-friendly options, materials like sheep’s wool, cork, or recycled newspaper can be used as insulation.
    • Polystyrene Wall Insulation: Polystyrene boards are a common choice due to their affordability and insulating capabilities.
    • Insulated Plasterboard: Insulated plasterboard combines insulation and plasterboard in one, making it easier to install.

    Step-by-Step Guide to Insulating Interior Walls

    Now, let’s walk through the process of installing internal wall insulation to transform your cold wall into a warm, cosy space.

    1. Assess Your Walls

    Begin by identifying the type of walls in your home—solid walls, cavity walls, or stud walls. The insulation method you choose will depend on this assessment.

    2. Prepare the Area

    Clear the area around the walls by removing furniture, skirting boards, and any wiring or pipework that might interfere with the insulation process.

    3. Install a Vapour Barrier

    A continuous vapour barrier is essential to prevent moisture buildup inside the wall. Ensure it is correctly positioned to act as a barrier between the insulated area and the room.

    4. Apply the Insulation Material

    Carefully install the chosen insulation material between the wall studs or directly onto the wall’s surface, following the manufacturer’s instructions.

    5. Fit Skirting Boards

    Replace or reinstall skirting boards to cover the insulation edges neatly and maintain a polished appearance.

    6. Deal with Cold Bridges

    To avoid cold bridges, insulate around window frames and doors, ensuring that there are no gaps where heat can escape.

    7. Finish the Walls

    You can finish your insulated walls with insulated plaster, insulated plasterboard, or even insulating wallpaper to maximise thermal efficiency.

    8. Monitor Moisture

    Keep an eye on the wall’s surface for any signs of moisture buildup. Proper insulation should prevent condensation and dampness.

    9. Enjoy the Benefits

    Once your interior walls are properly insulated, you’ll notice a significant improvement in comfort and energy efficiency. Say goodbye to cold walls and hello to lower heating bills!


    Insulating a cold wall from the inside is a smart investment in your home’s energy efficiency and comfort. Whether you have solid walls, cavity walls, or stud walls, there’s a suitable insulation method and material for you.

    By following the steps outlined in this guide, you can transform your chilly interior into a warm and inviting space while reducing your energy consumption and heating costs.

    Don’t let cold walls stand in the way of your home’s cosiness—take action and insulate today!

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