Most Vizat fire doors are listed in familiar UK sizes: 1981 mm-high leaves in several widths, and a metric 2040 mm-high set. The right size is the one that fits the opening with only the trimming the lipping allows, and with the small gaps a fire door needs. This guide sets out the sizes published on Vizat product pages and how to measure up before you order.
This article is general guidance, written with England in mind, and is not legal advice. Fire door requirements depend on the building, its use, the fire strategy and the fire risk assessment. Rules in Scotland, Wales and Northern Ireland can differ. If you are unsure, take advice from a competent fire safety professional before you buy or fit a door.
Sizes listed on Vizat fire doors
Vizat shows fire door sizes in millimetres on each product page. Across the main veneer and plywood fire door range, the options most often listed are the 1981 mm-high “imperial” set and the 2040 mm-high metric set. The table below uses those listed millimetre sizes and, for the 1981 mm doors, the usual UK trade equivalents. It is a reading aid, not a separate size chart published by Vizat.
| Listed size (height × width) | Usual UK trade equivalent |
|---|---|
| 1981 × 610 mm | 6'6" × 2'0" |
| 1981 × 686 mm | 6'6" × 2'3" |
| 1981 × 711 mm | 6'6" × 2'4" |
| 1981 × 762 mm | 6'6" × 2'6" |
| 1981 × 838 mm | 6'6" × 2'9" |
| 1981 × 864 mm | 6'6" × 2'10" |
| 1981 × 914 mm | 6'6" × 3'0" |
| 2040 × 526 mm | Metric (listed on some panel fire doors) |
| 2040 × 626 mm | Metric |
| 2040 × 726 mm | Metric |
| 2040 × 826 mm | Metric |
| 2040 × 926 mm | Metric |
Not every product offers every size. For example, the Oak Veneer Non Glazed FD30 Internal Fire Door lists the seven 1981 mm widths above plus 2040 × 626, 726, 826 and 926 mm. The Oak Veneer 20G Glazed FD60 Internal Fire Door lists a shorter set: 1981 × 686, 762 and 838 mm, plus those four 2040 mm sizes. Some panel fire doors, such as the 2 Panel Smooth Arch Top FD30 Fire Door, also list 2040 × 526 mm. Check the size menu on the exact product.
How to measure before you order
Measure more than once, using a tape at several points:
- Width of the opening or lining at the top, middle and bottom. Use the smallest figure.
- Height at both sides and in the centre. Use the smallest figure.
- Squareness, by comparing diagonal measurements. A winding or out-of-square opening may need a new lining or a different approach, not a heavily trimmed leaf.
- Threshold and floor finish, including any planned flooring, so the door can close over the floor without excessive gaps.
A fire door needs a small, even gap around the sides and head so that intumescent seals can work, and a controlled gap at the threshold, especially where smoke control is required. Vizat’s maintenance article gives a typical figure of 3 mm to 4 mm between door and frame as a rule of thumb. Follow the door’s own instructions and, for timber doors, the recommendations in BS 8214 rather than trimming “until it fits”.
Trimming and lippings
On the FAQs page, Vizat says doors often need planing when they are hung, and that customers should look at the thickness of the lipping on the item to see how much can be taken off. No single allowance is published for the whole range, so do not assume a standard 3 mm or 6 mm trim on every edge. Over-trimming can expose the core and undermine the door.
Linings, pairs and delivery
If you are replacing the frame as well as the leaf, see Frames/Lining. Pair doors are listed in Pair – Internal Doors.
UK delivery is described on Vizat’s delivery information page: orders are typically dispatched in 3–10 working days, charges start from £2.95 and, in England, run up to £96 including VAT. Heavier items may need help to offload; crane-off or tail-lift services are available on request for an extra charge. Someone must be present to receive the delivery.
Frequently asked questions
What fire door sizes does Vizat list?
Most veneer and plywood fire door pages list sizes in millimetres. A common set is 1981 × 610, 686, 711, 762, 838, 864 and 914 mm, plus metric heights of 2040 × 626, 726, 826 and 926 mm. Some products, including many FD60 doors and some glazed styles, show a shorter list. Some panel fire doors also list 2040 × 526 mm. Always use the size options on the product you are buying.
Should I order the same size as the old door?
Measure the structural opening (or the existing lining, if it is being kept), not only the old leaf. Fire doors need planned gaps at the sides, head and threshold. An old door that has been heavily trimmed may not be a safe template. If the lining is also being replaced, choose a leaf and lining that work together.
Can a fire door be trimmed to fit?
Often a small amount of trimming is needed. Vizat’s FAQs page says it is common to plane a door during fitting, and asks customers to check the lipping thickness on the item to see how much can be taken off. The site does not publish a single millimetre allowance for every door. Do not trim beyond the lipping or the manufacturer’s instructions, because that can affect the door’s performance.
Does Vizat list imperial sizes, such as 2'6"?
Product options are listed in millimetres. The 1981 mm-high sizes correspond to the familiar 6'6" trade heights (for example 1981 × 762 mm is commonly called 6'6" × 2'6"). The 2040 mm-high sizes are the usual metric set. Use the millimetre options when you order.
Are pair doors listed?
Yes. Many styles are also listed as pairs, and door pages point customers to the Pair – Internal Doors collection. Check whether the size shown is for each leaf. For a double opening, get the opening measured carefully.
What about door linings?
Vizat lists fire door linings in the Frames/Lining collection, including hardwood and oak universal linings in 2130 × 108 mm and 2130 × 133 mm, and factory-primed flat-pack linings in FD30 and FD60 versions. Match the lining rating to the door rating unless your specification says otherwise.
Related guides and products
You may also find these Vizat guides useful:
- FD30 vs FD60 fire doors: what's the difference?
- Glazed fire door rules
- Choosing a fire door for an HMO or flat
- Fire door ironmongery: closers, hinges and seals
- How to measure and fit a fire door
Existing Vizat articles on regulations and upkeep:
For product questions, contact Vizat Doors on the contact page, email info@vizatdoors.co.uk or call 0116 319 1940.