Timber Door Frame Sizes

Call Us Today 07565028004


Welcome to Sash Window Refurbish

Experts in Sash Windows Repair & Restoration, Timber Windows & Timber Doors in east midlands

Why Trust Sash Window Refurbish?

Sash Windows Refurbish specializes in providing repair and restoration services for wooden windows and doors in the UK, as well as various types of carpentry. During the process of fulfilling orders, we utilize a range of tools and paints, including saws, sprays, primers, resins, and adhesives. With more than 20 years of experience in carpentry, we have tested and used various brands and types of work tools, making us well-equipped to offer helpful advice on selecting the right tools and paints for your needs. Read more ...

Timber doors have remained popular for years due to their timeless style, elegance, and versatility in various interiors. Despite being slightly pricier than alternatives, they are a worthwhile investment. It’s crucial to note that a door is incomplete without a frame.

Whether in new constructions or furnished homes, door frames are essential in every doorway. Choosing the right door frame size is crucial, and this article provides insights for those looking to install or replace timber door frames.

What Is a Door Frame?

The door frame, fixed within the building wall opening, is crucial as it serves as the hinge point for the door leaf. When chosen thoughtfully, it functions seamlessly for years and enhances the aesthetics of timber doors.

Despite being often overlooked, door frames are essential complements to door leaves. A properly selected door frame ensures timber doors’ reliable and smooth operation, combining functionality with aesthetic appeal.

Wooden Door Frame Sizes

Timber door frames come in varying sizes, depending on the chosen variant: fixed or adjustable.

A fixed frame is ideal for standard wall thicknesses, but it lacks adjustability and may require additional decorative elements to maintain room aesthetics. Installation demands precise alignment, typically before interior finishing, making it cost-effective.

For frameless frames, there’s an adjustment range of 15 mm beyond the masonry thickness. For knotty frames, this adjustment range extends to 20 mm beyond the thickness of the masonry.

On the other hand, an adjustable frame suits atypical wall thicknesses and uneven walls, offering flexibility in dimensions. It is installed post-construction, without additional masking strips, ensuring an aesthetic effect. Available in various colours, it accommodates old and new constructions and can compensate for wall curves. However, it may not be suitable for doorways directly against a wall or small interiors due to installation restrictions.

Don’t Forget to Measure Precisely

Before heading to the store to purchase a new timber door frame, it’s essential to obtain precise measurements of the door opening. Measure the height, width, and thickness of the walls, and also check the diagonals to ensure they are of equal length.

How to Pick Your Door’s Frame

Selecting a door frame involves challenges in determining not only the size but also the material and colour of the timber frame. The ideal solution is to opt for a frame crafted from the same material and coloured similarly to the door leaf. This ensures an aesthetically pleasing effect, preserving the stylish appearance of interiors post-installation. The simplest option lies in fixed models, known for being economical, easy to install, and suitable for flats or houses.

On the other hand, adjustable frames are recommended, particularly for rooms with unconventional dimensions, effectively accommodating even thick walls. It’s crucial to note the distinction in installation dimensions between fixed and adjustable door frames. For instance, fixed frames like a door size 80 require an opening at least 11.5 cm wider, while adjustable frames necessitate adding approximately 8 cm to the leaf dimension, including the height.

When constructing a house or renovating a flat, the size of a timber door emerges as a vital parameter. Ensuring the right width and height of the timber door is crucial for comfortable use of the living space.

Timber Entrance Door Sizes

In flats, the typical size for timber entrance doors is a minimum of 90 by 200 centimetres. Enlarging the door’s width and height is only feasible if the door opening exceeds standard dimensions. External doors, for both height and width, are significant factors in houses.

For houses, external doors commonly have a height of 200 centimetres and a width of 90 centimetres.

Internal Timber Door Sizes

Internal doors should be appropriately sized to suit the characteristics of the room. The standard height for internal doors is typically set at a minimum of 200 cm. Door widths commonly range between 60 cm, 70 cm, 80 cm, and 90 cm, representing popular and universally applicable sizes.


Do solid wood doors increase home value?

Solid wood doors can potentially increase home value as they are often perceived as high-quality and durable, enhancing the overall aesthetic appeal of a property. Homebuyers often appreciate the classic and timeless look of solid wood doors, which can contribute positively to a home’s market value.

Do front doors and shutters have to match?

While there’s no strict rule that front doors and shutters must match, a coordinated colour scheme or complementary design can enhance curb appeal. Consistent design elements create a cohesive look, but it’s not a requirement—individual preferences and architectural styles also play a significant role in determining the overall aesthetic of a home.

About the author

Glen Ramsey, who presently holds the positions of customer support and content manager, is a cherished member of the Sash Window Refurbish team. He is in a unique position to provide advice on all questions pertaining to the renovation of historic windows because he has a wealth of experience in all elements of window renovation, dealing with clients regularly and assisting them in choosing the best window-related course of action. He oversees the creation of information for all of our platforms in his capacity as content manager, including web content and other materials. Glen has witnessed the whole gamut of Sash Window Refurbish's window restoration activities, from our work on significant listed Georgian homes to a wide variety of smaller-scale private residential projects.


My technician Andrew replaced all my sash windows that had rotten sills. Accessing the rotten sills was not an easy task. He explained to me what needed to be done in order to fix the problem. He is a great person and I’m happy that he was the one who did the job. He is reliable, tidy, friendly and very professional. I highly recommend him.



I hired Andrew and Alex a while back to repair my damaged sash windows. They were was very considerate and very patient as he did his job. A few days ago, I had another problem with one of my sash lock keys and I called him again to come and fix the problem. I’m very impressed that Liam responded quickly and he not only fixed the problem but he also gave me a spare key. What a great after sales service!

Alan W.


I’m very impressed with the new windows that Andrew installed and also the reconditioning job that he did on other sash windows. The quality of his work is by far more superior than what we got when we hired another company a few years back. We will certainly hire him again if any window work arises

Kelly (Sleaford)


Our decorator referred us to Andrew because some of the work needed a window expert. Andrew together with our decorator did a fantastic job. The work was done efficiently and to the highest standards. Andrew is understanding, committed and very professional. I recommend him without any hesitation.

Steaven Reader


Alex did a great job in fixing windows in our terraced house. The windows were broken, frames damaged and the wood was also rotten. Alex's job was high quality and he did it pretty fast. I was also very impressed that he was considerate of my son’s asthma condition and maintained cleanliness. Top work.



Andrew just recently replaced three sash windows in my Edwardian house. He also repaired and replaced some sills and draught proofed three windows. In addition to that, he also did some carpentry work. What I like the most about Liam is that he did a clean job. He is very professional and always updated me about the timescales and costs. He also did his job with minimal disruptions. I highly recommend him.

Cris M.