Everything you need to know about pre-hung doors

Doors – perhaps not a topic you’ve thought a lot about until it’s time to replace yours. But when you do have to make a decision, there are so many options available it becomes a bit mind boggling.

If you’ve been Googling your options for days, you might have come across the term ‘pre-hung doors’ (also sometimes known as ‘doorsets’). These are complete door systems that come pre-assembled and ready to install right out of the box. They consist of the door slab, the frame, hinges, and often other hardware and components that have been carefully precision-maufactured to ensure they slot perfectly into the existing door aperture.

Buying and installing pre-hung doors is a really easy way to update the look and functionality of your home without the complexity of assembling all the components separately. So if you want to know more about them, my guide will cover everything you need to know for both interior and exterior applications.

 

Types of Pre-Hung Doors

There are pre-hung doors available for both inside and outside your home, and each can be made from different materials and varying designs depending on what you need.

Interior Pre-Hung Doors

Interior pre-hung doors can be used throughout your home in bedrooms, bathrooms, wardrobes and more – yep, they’re that flexible. They come in flush styles (a simple slab that is flush to the wall for a minimalist effect) as well as space-saving pocket doors that slide directly into the wall and bi-fold doors.

As interior doors don’t need to be made from as durable materials as external doors, you can choose from wood (oak, pine and poplar) or even steel and fibreglass. But of course, each has their own pros and cons. Wood might need restaining and sealing over time, but it creates a beautiful finish. Fibreglass is a little more resistant to warps and dents and steel can be budget friendly but offers a very industrial finish.

 

Exterior Pre-Hung Doors

Exterior pre-hung doors need to withstand weather elements and provide security, unlike your interior doors that don’t. You can still choose from a range of materials that can offer kerb appeal, including wood, but do consider which will be the most hard-wearing and last the longest. You don’t want to be replacing your doors just a few short years after they’re installed.

Similar to interior doors, exterior steel doors are also extremely durable, dent-resistant, and secure as they won’t warp, crack or rot but they do have less aesthetic appeal than wood. Fiberglass resists dents, rots, and warps even in harsh climates and offers stainable natural wood grain patterns with excellent insulation.

Pre-hung doors can be installed as a front door, with decorative options available including glass inserts and carvings, or a patio or back door (sliding, French, etc).

 

Components of Pre-Hung Doors

So what exactly is it that makes a pre-hung door a pre-hung door? There are a few main parts/components to be aware of.

The Door Slab

The door slab is the actual operating door that opens and closes. Interior and exterior door slabs have differences in materials, thickness, structural reinforcement, and energy efficiency ratings.

Door Frame

The frame consists of vertical jambs down either side and a horizontal header across the top that creates the opening for hanging and fitting the door slab into. Exterior door frames are typically wood-wrapped in protective vinyl, aluminum, or composite cladding. Brickmould trim frames are also common.

Hinges and Hardware

Most pre-hung doors come with hinges already attached to connect the slab and frame. Choose from standard or ball-bearing hinges in finishes to match other hardware. Some pre-hung units also include lockset door handles, deadbolts, and other hardware.

Weatherstripping

Exterior pre-hung doors always feature weatherstripping around the edges and thresholds to seal out drafts, moisture, dust, and noise. Materials that are common include felt, foam, vinyl seals and rubber sweeps.

 

Pros and Cons of Pre-Hung Doors

There are a number of advantages and disadvantages of pre-hung door units, particularly when compared to building your own door and frame separately.

Advantages

• Convenience – All components are pre-assembled at the factory for faster installation compared to onsite assembly.
• Consistency – Components are designed and engineered to always fit together properly with no guesswork.
• Affordability – Factory-made systems with bulk order materials keep costs competitively priced with custom builds.
• Weatherproofing – Exterior units are engineered for better insulation using the latest materials and seals.

Disadvantages

• Limited customisation – You may be restricted to standard door and frame sizes from manufacturer catalogues, and any custom work can increase the cost.
• Heavy and bulky – Pre-hung doors can be challenging for DIY manoeuvering and installing without an extra set of hands.
• Can’t alter frame size – The doors must fit existing wall opening dimensions unless framing is reworked.

 

Choosing the Right Pre-Hung Door

So how on earth can you choose the right pre-hung door?

First, you need to consider the opening. How will it open, what will it open on to, which way should it open? You’ll also need to take the right measurements, including width, height and frame depth. I’d suggest that you take a few measurements for each to account for wonky walls and sloped floors (there’s never going to be a home out there with completely straight doors, walls and windows).

When taking your measurements, account for clearance too for opening the door and then manoeuvering around any furniture that may potentially get in the way, including sofas, dining tables, kitchen units or beds.

Style is a big deciding factor too (arguably the one people put first ahead of other practical factors). You want the door to coordinate with your existing decor and style, and you can pick the material, colours, finishes and even glassware if the door will have glass in it.

There are a lot of decisions to make when it comes to the material, as the one you choose could impact the sound and heat insulation, the visual appeal, the durability, the repair ability and the cost.

 

What Does the Installation Process Involve?

Proper installation is paramount to ensure the door operates properly and is fully sealed. You’ll likely need a joiner or other professional to do this for you, unless you’re very handy and have lots of DIY experience.

Step 1: Prepare the area

To prepare the area, you should fully remove the existing door unit and fix any issues with the surrounding wall now, including filling in cracks and securing loose plaster. Use a spirit level to ensure the sides of the rough opening are plumb (vertical) and the header is level.

Step 2: Dry fit the door

Take your pre-hung door and place it into the opening to check it’s definitely going to fit. There should be a small gap around the frame to allow for any adjustments and these can be filled later to give a neat finish.

Use some wood shims or packers to temporarily hold the door in place (or ask another person to help hold it for you if this is easier). Position the shims behind the hinges and at the top and bottom of the frame to keep the door as steady as possible.

Step 3: Secure the frame

Screw the frame to the opening, starting at the hinged side. Insert screws through the frame into the studs or masonry behind. It is best to secure the hinge side first to ensure the door hangs correctly. Once you’ve done this, you can check it’s straight and adjust until it is, adding more shims if required to keep the frame square.

Once you’re happy it’s straight and you’ve checked the door opens and closes smoothly, screw in the opposite side of the frame.

Step 4: Insulate and seal

Now your door is fitted and you’re happy, it’s time to make it look finished. Fill the gaps around the frame and the wall with something like expanding foam or frame sealant. This will add extra insulation too.

Step 5: Fit the trim (if applicable)

If you have trim to be fit, cut it to size and then fit them around the door frame, securing with finishing nails or adhesive. Then seal any final gaps with caulk or sealant.

Step 6: Finishing touches

After the door is fitted, it’s time to make it look a little prettier. You can paint or stain the door or frame, or if you want to leave it natural, simply paint the wall around the door up to the frame. If you’ve installed an exterior door, attach any hardware you have for it, including knockers, handles, letterboxes, etc.

 

What is the Cost of Pre-Hung Doors?

There are a number of factors that could influence the price of pre-hung doors, including the size of the door and the frame and the materials used.

Basic internal pre-hung doors, often made from materials such as MDF or softwood, typically range from £70 to £150. These doors are generally plain or feature simple panel designs, making them suitable for standard internal use without any extra features.

For those seeking higher-quality internal doors, options made from solid wood or featuring more intricate designs, such as glazed panels or decorative mouldings, are available. These premium internal pre-hung doors usually fall within the price range of £200 to £400 or more, reflecting their superior materials and craftsmanship.

External pre-hung doors tend to be more expensive due to the added requirements for security, weatherproofing, and insulation. Basic external models made from uPVC or composite materials start at around £300, while options crafted from solid hardwood or premium composite materials can range between £500 and £1,200. The higher price for external doors reflects the need for durability and safety features.

Fire-rated pre-hung doors, which comply with fire safety regulations, also command a higher price. These doors are designed to offer fire resistance for a specified period, such as 30 or 60 minutes. Prices for internal fire-rated doors typically range from £150 to £400, depending on the fire rating and materials used in their construction. Generally, these kinds of doors are only needed in commercial properties and buildings, and not homes.

For bespoke or custom-made pre-hung doors, the price can vary widely based on the specifications. Custom doors made from high-quality timber or featuring special finishes can start at around £600 and go up to over £2,000, depending on the level of customisation and craftsmanship involved.

Additionally, there are other factors that can affect the total cost. Installation fees generally range from £75 to £150 per door, depending on the complexity of the fitting and the location of the property. Furthermore, the cost of additional hardware, such as handles, locks, and letter plates, will add to the overall expense.

 

Where to Buy Pre-Hung Doors

Pre-hung doors are widely available from various suppliers across the UK, catering to different budgets and preferences.

Your first point of call should probably be a large DIY or home improvement retailed, like B&Q, Wickes, and Homebase. These stores typically stock a range of standard pre-hung doors suitable for both internal and external use, including budget-friendly options as well as more premium models.

For those seeking more specialised or high-quality doors, dedicated door and window suppliers are a good option. Companies such as Howdens, Travis Perkins, and Jewson offer a wider range of pre-hung doors, including bespoke or custom-made options. These suppliers cater to tradespeople and homeowners who require doors with specific features, such as fire-rated models, solid wood finishes, or unique design elements.

Specialty door companies will likely have the largest selection of premium materials and can completely customise your doors so they’re exactly what you’re after.

Additionally, it’s worth considering salvage yards or reclaimed building materials suppliers for unique, character-filled pre-hung doors. These sources can be ideal for period properties or those looking to incorporate sustainable and reclaimed materials into their home. With a little searching, it is possible to find vintage or antique pre-hung doors that add a distinctive aesthetic while being environmentally friendly.

Overall, there are plenty of options in the UK for buying pre-hung doors, from mainstream DIY stores to specialised suppliers and online retailers, each offering a range of products to suit different requirements and budgets.