When renovating or building a home, understanding the standard dimensions of internal doors is essential. Whether you’re replacing old doors or planning a new design, knowing the standard sizes will help ensure a smooth process. In this guide, we’ll walk you through the common dimensions of internal doors, why they matter, and how to measure for a new door.
What Are Internal Doors?
Internal doors serve an essential function within a home, dividing spaces while maintaining privacy, security, and aesthetic appeal. These doors are designed for use inside the home and do not need to withstand external weather conditions. They can be made from various materials, including timber, MDF, and glass, and come in a wide range of styles to suit any interior design.
It’s important to differentiate internal doors from external doors, which need to be sturdier and more weather-resistant due to exposure to the elements.
Standard Dimensions of Internal Doors
When choosing a new internal door, it’s helpful to know the standard dimensions to ensure proper fit and functionality. While there are some variations depending on the style and design of the door, there are a few common measurements you’ll encounter.
Height:
The most common height for internal doors is 2040mm. This height suits most homes and is considered the standard for residential doors. This size strikes a balance between accessibility and design, making it perfect for a range of spaces from bedrooms to bathrooms. Some variations may exist, particularly in older homes, where doorways might be taller or shorter.
Width:
The standard width of an internal door is typically 820mm, though 870mm and 900mm doors are also common, especially for larger rooms or for accessibility purposes. These widths accommodate most people and furniture, offering a good mix of functionality and ease of use. For those who require wider doors for better accessibility or prefer a more spacious look, you may also find doors in widths of 1200mm and beyond.
Thickness:
Most internal doors are 35mm thick, with some premium options reaching 40mm in thickness. The thickness of a door plays a crucial role in its soundproofing capabilities, insulation, and overall strength. Thicker doors tend to be sturdier and more durable, making them ideal for high-traffic areas or rooms that require extra privacy.
Variations in Door Sizes
While standard door sizes are common, some homes and commercial properties require non-standard dimensions. In these cases, you may need to opt for custom-sized doors that perfectly fit your unique door frame. Whether it’s an unusually sized opening or a desire for an oversized statement door, custom options are readily available.
For example, larger doorways, such as those leading into living rooms or master bedrooms, often feature doors that are wider or taller than the standard 820mm width. The growing demand for more accessible doorways has also led to an increase in wider doors, particularly in spaces where ease of access is a priority.
Factors Affecting Door Dimensions
Several factors influence the final size of the door you choose. One of the key considerations is the door frame. If you’re replacing an existing door, you’ll need to ensure that the new door fits within the frame without requiring major adjustments. Frame dimensions can vary, and the width of the walls can also impact the size of the door.
Another factor to keep in mind is the wall thickness and design, which might impact the door’s dimensions and choice of hardware. For example, a thicker wall may require a wider frame or a custom-sized door to fit seamlessly.
Why Standard Dimensions Matter
Standard dimensions are crucial for ensuring compatibility between the door and the door frame. They allow for a smoother installation process and prevent the need for costly alterations or customisations. Understanding the dimensions helps you select the right hardware, such as hinges, handles, and locks, which are designed to fit doors of standard sizes.
Additionally, opting for internal doors for sale that match these dimensions ensures that you are purchasing doors that will be easy to install and won’t require extra modifications. It can save time and money during a renovation or construction project, allowing you to focus on other design aspects.
How to Measure for a New Internal Door
If you’re replacing an existing door or installing a new one, accurate measurements are key to finding the right fit. Here’s how to measure your door frame:
- Measure the height: Measure the distance from the floor to the top of the frame on both sides. Ensure that the door height is 2040mm or another standard size based on your needs.
- Measure the width: Measure the distance between the sides of the door frame. If you’re replacing an existing door, use the width of the current door as a guide.
- Measure the thickness: Measure the thickness of the door frame to determine whether you need a 35mm or 40mm thick door.
Using these measurements, you can choose the appropriate size door, whether it’s a standard size or a custom one. Always measure twice to avoid errors.
In Closing
Knowing the standard dimensions of internal doors is essential for any home renovation or construction project. By choosing the right size, you’ll ensure a perfect fit and seamless installation. Whether you’re replacing a door or installing a new one, taking the time to measure correctly will save you time, effort, and costs in the long run.
Explore the range of doors available for your project, and remember that whether you choose standard or custom options, the right dimensions can make a world of difference in the final result.
