Replacing an interior door can dramatically improve the look of a room, but the installation process is where many projects go wrong. Even a high-quality door won’t perform well if it’s poorly fitted. To help, at Internal Doors, we have outlined the most common mistakes people make when installing an internal door and how to avoid them.
We would always recommend hiring a qualified carpenter or joiner to carry out the installation, as this is not generally a task suited to DIY. Professional fitting ensures your door operates smoothly, lasts longer and avoids the costly mistakes many homeowners make.
Why Do Interior Door Installations Go Wrong?
Often, issues arise from underestimating the job. Installing a door requires precise measuring, careful trimming and the right hardware. Overlooking small details can lead to sticking doors, uneven gaps, or worse, damage that shortens the life of the door.
Do You Measure Properly Before Installation?
One of the biggest mistakes when replacing interior doors is assuming a “standard” size will fit. Frames are rarely perfectly square, especially in older homes. Always measure the height and width in several places and check the diagonals to ensure squareness.
If adjustments are needed, trim the door gradually and test frequently.
Should You Trim Before Test Fitting?
Another common error is trimming the door too soon. Always test fit the door in the frame first. Only trim where necessary, and reseal any cut edges immediately to protect against moisture. This is especially important with oak veneer doors, which have thinner layers that must be handled carefully.
Are Hinges and Handles Fitted Correctly?
Incorrect hinge placement is a frequent cause of doors sagging or catching. Hinges should be evenly spaced, set into neat recesses and aligned carefully. Similarly, fitting door handles and ironmongery without proper measurement can result in uneven or awkward finishes.
Investing in quality hardware not only ensures smooth operation but also complements the style of your chosen internal door.
Do You Seal the Edges?
Skipping edge sealing is one of the costliest mistakes. Moisture can seep into unprotected edges, causing swelling or warping. Whether you’re fitting a solid oak door or a veneer option, sealing every edge is essential.
What About the Frame?
When replacing interior doors, many people forget to inspect the frame itself. A warped or damaged frame will compromise even the best installation. Where needed, replace or repair the frame for a long-lasting result.
Final Tips for Interior Door Installation
Take your time, use the right tools and follow manufacturer guidance closely. However, for best results, we strongly advise leaving the work to an experienced professional rather than attempting a DIY approach. By avoiding these common mistakes, your new doors will fit perfectly, look stunning and perform reliably.
Explore our full range of internal oak doors, oak veneer doors and handles to find the perfect combination for your home.