Deanta Door Sizes Guide – How to Choose the Correct Internal Door

Replacing your internal doors is an important investment, and choosing the correct size first time is essential. This guide is designed to help you confidently select the right Deanta internal door sizes, avoid costly mistakes, and understand when a bespoke Deanta door may be required.

Understanding Standard Internal Door Sizes

Most UK homes are built with standard internal door openings, meaning many Deanta doors are available in stock sizes for fast delivery. In-stock standard sizes can typically be delivered within 3–5 working days.

However, not all door styles are available in every size. We strongly recommend measuring your doors before ordering so you can filter by height, width, and thickness to see which Deanta doors are available for your project.

👉 Tip: Doors within the same property often vary in size. Bathrooms, cloakrooms, and kitchens commonly require narrower doors.

Imperial vs Metric Door Sizes Explained

Although all Deanta door dimensions are shown in both metric and imperial units, doors are generally referred to as either imperial or metric:

• Imperial doors (commonly found in England & Wales)

  • Height: 1981mm (6'6")

  • Thickness: 35mm

• Metric doors (commonly found in Scotland & Europe)

  • Height: 2040mm (6'8")

  • Thickness: 40mm

Standard UK Internal Door Heights

• 1981mm – Standard internal door height in England & Wales

• 2040mm – Standard internal door height in Scotland

Standard UK Internal Door Widths

The most common internal door width in the UK is 762mm (30"), which is widely stocked across most Deanta door ranges.

Common door widths include:

Imperial Door Widths

• 457 / 533mm (18" / 21") – Cupboards & wardrobes

• 610 / 686mm (24" / 27") – Bathrooms & small rooms

• 762mm (30") – Standard internal door

• 838mm (33") – Part M / wheelchair access

Metric Door Widths

• 526 / 626mm – Cupboards & wardrobes

• 726 / 826mm – Most internal rooms

• 926mm – Large openings / wheelchair access

Standard Internal Door Thickness

• 35mm – Standard imperial internal doors (England & Wales)

• 40mm – Standard metric internal doors (Scotland)

Fire Door Sizes Explained

Fire-rated Deanta doors are thicker than standard internal doors:

• FD30 (30-minute fire door): 44mm thick

• FD60 (60-minute fire door): 54mm thick

Fire doors are recommended for:

• Kitchens

• Integral garages

• Escape routes in 3-storey homes and loft conversions

Fire doors are legally required in HMOs and are often pre-installed in new-build properties.

Most Common Internal Door Sizes

The most frequently used sizes are:

• 1981 × 762 × 35mm – England & Wales

• 2040 × 726 × 44mm – Scotland

All Deanta door sizes are displayed in the format:
Height × Width × Thickness

Door Lippings & Trimming Explained

Even standard-sized Deanta doors often require trimming during installation to ensure a perfect fit. This is where door lippings are important.

Door lippings are solid timber edges that protect the internal core and allow trimming. Most doors typically require 5–8mm trimming per edge, depending on the opening and flooring.

• Lippings usually range from 8–20mm

• Hardwood or solid oak lippings are common

• Engineered oak doors feature oak lippings to maintain a consistent finish after trimming

⚠️ Exceeding the recommended trimming allowance may compromise the door’s structural integrity and invalidate the manufacturer’s guarantee.
Lipping information can be found in the product description for each Deanta door.

Non-Standard & Bespoke Deanta Doors

If your opening is non-standard, many Deanta doors are available as bespoke made-to-measure doors.

• Ideal for reduced sizes, taller doors, or loft conversions

• Bespoke doors are manufactured in proportion to the original design

• Current lead times apply due to factory production schedules

If you require a custom size, simply send us your measurements and we can obtain a bespoke Deanta door quote directly from the factory.