External doors hugely impact and influence the kerb appeal of houses, new and existing alike. Choosing a new front door is deciding how to present what the home beyond will be like, so taking the time consider the options is definitely worth it.

Mostly, it comes down to personal preference and budget, but security, material and thermal efficiency should all inform the decision once you’ve chosen a design that suits the rest of the house.

The barriers between your home and the outside world, external doors provide security as well as privacy and as such, their practical — just as much as their aesthetic — attributes need to be thought through.

black glazed modern external door

Hörmann‘s aluminium Thermosafe range has high thermal insulation and a five point security lock.

What is the Best Material for an External Door?

Timber

The most popular material for external doors, timber can be the cheapest to buy off-the-shelf but are also prone to twisting and warping over time.

  • Hardwood doors are just as likely as softwood doors to move, but a reasonable compromise for those who want something better is to choose hemlock, a durable North American softwood particularly well suited to doors.
  • Capable of outperforming hardwoods, Accoya heated timber, a process developed in Holland, and is usually finger-jointed which makes it more suitable for painting than staining.
  • Laminated or stabilised timbers (usually oak), which consists of small sections glued together, are also available.

entrance with french doors of traditional style house

Evolution’s wood-effect french doors ensure the character of this Georgian property is not lost. Evolution’s external doors cost around £1850 including installation.

Other Popular Materials 

Non-timber external door materials tend to be more expensive, but they offer the benefit of dimensional stability. 

  • PVCu tends to be the cheapest alternative (costing around 20% less than a solid wood door) but there is very little inherent strength in PVCu. The doors are built around a steel frame and invariably come with a multipoint locking which is necessary because of the material’s innate flimsiness
  • Aluminium is widely used for sliding patio doors but the frames conduct a lot of heat so they’re not ideal, though the channels are relatively small
  • External doors made of steel are primarily used in social housingin the UK but are more popular in North America. However, steel tends to have an aura of security around it which is perhaps unjustified, since a door is no stronger than its frame (usually softwood). Steel takes paint well but is susceptible to bodywork damage
  • A realistic woodgrain can be achieved by using GRP (glass-reinforced plastic), also referred to as fibreglass. It can also match other joinery by using a stain

Composite Doors

As PVCu and GRP are cladding materials, they require a subframe of timber or steel and are therefore referred to as composite doors. A big advantage of choosing a composite door is that the thermal characteristics can be improved by packing the hollow core with insulation. 

Keeping Homes Safe: Security in External Doors

External doors are the interface between the inside and outside worlds. They have to perform two distinct and contradictory functions: they have to be easy to get through for residents and guests but secure against unwanted visitors.

modern black front door

JB Kind’s contemporary Tigris Extreme comes with a 10-year guarantee. Pre-finished in white, homeowners can personalise this door with colours suited to their home. From £402.

Generally, we have two separate locks on our front door:

  • The mortice deadlock sit inside the door housing and needs to be key-operated from inside and out.
  • A night or rim latch (still referred to as a ‘Yale’) can be hand-operated from the inside to facilitate escape in the event of a fire but are less secure than mortice locks as they can be forced open.

Although it’s not essential to have two separate locks, it does form part of the NHBC recommendations for new homes and as such has been widely adopted by insurance companies. The deadlock should be fivelever and should ideally meet the BS3621 standard.

Other features regarded as good security in front doors include fitting a door chain and, on solid doors, a viewer.

Security Standards

There is an enhanced security standard, PAS 24, which is only available on factory-built doorsets. Houses that meet the Secured by Design standard set by the police also need to meet the PAS 24 standard.

This includes subjecting the doorset to a three-minute attack using a selection of hammers, crowbars and drills

sage green entrance door with glazing

This timber front door is part of the Performance range from Green Building Store. It features triple glazing and dual compression seals for long-term airtightness. From £800-£1,550.

Smart Tech

If you want to incorporate some smart technology in your door security, the considering items like a smart doorbell can be a sensible move. Check out the best deals on smart doorbells on RealHomes.com.

Disabled Access

Front doors are required to have a level threshold as Part M of the England & Wales Building Regulations so that wheelchair users can come in and out of the house without having to go over a step. Scotland and Northern Ireland have similar regulations in place.

However, this doesn’t have to mean the threshold is at the front door, sometimes it’s more convenient to use another external door instead. Renovations and extensions to existing homes do not have to comply with Part M.

black external door in house

Green Building Store’s composite designs mean the door is super thermally efficient.

Level Thresholds

Normally, a level threshold is one that has a lip of no more than 15mm. The doors themselves do not have to be altered in any way, though there is a requirement that the Part M compliant door should be at least 838mm (2’9”) wide.

The frame around the door should also be Part M compliant (less than 15mm) and there should be no step either inside or outside the door.

There are several ways to design such a detail, but a common one is to have a ramped approach to the front door and to have something like a sunken matwell inside the door so that people coming into the house can wipe their feet.

With a reasonable amount of forethought, it’s possible to create a level threshold without it being intrusive in any way.

modern wooden door in rendered house

Urban Front‘s Raw E80 solid wood design is finished with a classic arch and European oak stain.

External Fire Doors

Houses over two storeys have to have half-hour fire doors fitted to habitable rooms leading off the main corridor and landing areas. However, fire doors do not have to look ugly. There are now plenty of companies offering complementary fire door ranges alongside their standard internal doors.

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