Exitex Threshex Replacement Aluminium Door Cill Low Threshold 933mm

Exitex Threshex Aluminium Door Threshold 933mm × 80mm — Part M Compliant Draught Excluder Cill

Exitex Threshex Aluminium Door Threshold is the answer to a cold, draughty gap under your external door. If you can feel air moving across the floor, see daylight beneath the door, or find rainwater creeping onto your hallway flooring, the threshold is almost always the culprit. This 933mm (37") long × 80mm wide aluminium door threshold replaces a worn or missing cill with a low-profile ramped bar and pre-fitted rubber seals, blocking draughts, dust, rain, and insects in one straightforward fitting. It requires 17mm of underdoor clearance to fit and seal correctly, so measure both the gap beneath your closed door and the width of your existing threshold before ordering.

Manufactured by Exitex from extruded aluminium with a hard-wearing anodised finish, the Threshex is built for high-traffic doorways in both domestic and commercial settings. The profile is Part M compliant under UK Building Regulations, meaning the ramped edge is shallow enough for wheelchairs, prams, and mobility aids while reducing trip hazards. It suits timber, uPVC, and composite door sets, and is available in aluminium or black to match your existing door hardware.

Key Benefits for uPVC, Composite & Timber Door Owners:

• Part M Compliant Low-Profile Ramp – The shallow ramped edge meets UK Building Regulations Part M for accessibility, so wheelchairs, prams, and mobility aids cross without a lift or jolt. It also cuts the trip hazard that a tall, square-edged threshold creates for everyone else in the household.
• Twin Rubber Seals Block Draughts at Source – A small rubber seal sits underneath the threshold and a larger seal runs along the top. Both are pre-fitted in their slide-in channels, so the moment the door closes you get a compressed, continuous barrier against cold air — no draughty gap, no cold floor.
• Lower Heating Bills Through the Winter – The under-door gap is one of the biggest single sources of heat loss in a home. Sealing it properly with a weather-sealed threshold keeps warm air where you're paying to have it, which shows up on your heating bill rather than escaping across the doorstep.
• 80mm Width for a Straight Like-for-Like Swap – Measure the width of your existing threshold from front edge to back edge. If it reads 80mm, the Threshex drops into the same footprint with no gap behind it and no overhang at the front — the two measurements that decide whether a replacement threshold seals properly or simply sits there looking the part.
• Rain, Dust & Insect Protection – The same seal that stops draughts stops water ingress onto your hallway flooring, keeps windblown dust out, and denies insects an easy route in. One part, four problems solved, all year round.
• Extruded Aluminium Withstands Daily Traffic – Extruded aluminium with an anodised finish resists corrosion, wear, and weather, so you fit it once and forget about it.
• 933mm (37") Cuts to Size – Sized to suit most standard single external doors straight from the pack, and easily trimmed with a hacksaw for a precise fit to a narrower opening. Note that the 80mm width is fixed and cannot be trimmed.
• Straightforward DIY Fitting – Screws are supplied and the seals arrive already in place. With a drill, a screwdriver, and 17mm of clearance under your door, this is a comfortable afternoon job rather than a tradesman callout.
• Aluminium or Black to Match Your Door Furniture – Choose the finish that sits with your existing handles, hinges, and letterplate.
• Fits Timber, uPVC & Composite Doors – One threshold profile across all three common door types, so you don't need to identify a manufacturer-specific part before you can order a replacement.

Product Specifications:

• Brand: Exitex
• Product Name: Threshex
• Product Type: Aluminium Door Threshold / Draught Excluder Cill
• Length: 933mm (37")
• Width: 80mm (fixed — cannot be trimmed)
• Threshold Height: 10mm (excluding rubber seal)
• Underdoor Clearance Required: 17mm
• Material: Extruded aluminium with rubber sealing strips
• Finish Options: Aluminium, Black
• Seals: Small rubber seal underneath, large rubber seal on top — both slide-in and pre-fitted
• Compliance: Part M (UK Building Regulations — wheelchair accessible)
• Suitable For: External doors — timber, uPVC, and composite
• Features: Energy-efficient, weather-sealed, draught-proof, low-profile ramp
• Fixings Included: Yes — screws supplied
• Cut to Size: Length only — can be trimmed shorter than 933mm

Please take three measurements before ordering: the clearance beneath your closed door (17mm required), the width of your existing threshold front to back (this threshold is 80mm wide), and the full width of your door opening (to confirm 933mm is sufficient — the bar can be cut shorter, but not extended, and the 80mm width is fixed). If you are unsure which size you need, please contact us and we'll be happy to help.

Pro Tips:

Pro Tip: Before you order, lay a tape across your existing threshold from its front edge to its back edge — that width needs to read 80mm to match the Threshex. A narrower original leaves the new bar overhanging into the doorway; a wider one leaves a gap behind it that will still let water through. Then check your 17mm clearance with the door closed and latched, not resting ajar — a door that has dropped on its hinges will read a different gap in each position, and the measurement at the hinge side is often smaller than at the lock side. Take both. If the gap is under 17mm at any point, ease the hinges or plane the door bottom before fitting; forcing the threshold in will bind the door against the top seal and it will never latch cleanly. If you're trimming to length, cut from one end only with a fine-tooth hacksaw and slide the seals back in afterwards — cutting through them with the bar in place will leave a ragged edge that whistles in the wind.

Package Contents:

• 1 × Exitex Threshex Aluminium Door Threshold — 933mm (37") × 80mm
• 1 × Small rubber seal (underside, pre-fitted)
• 1 × Large rubber seal (top, pre-fitted)
• Fixing screws

Frequently Asked Questions:

Will this threshold fit my door?
The Exitex Threshex is 933mm (37") long and 80mm wide, and suits most standard single external doors in timber, uPVC, or composite. Three measurements matter: the width of your door opening must be 933mm or less (the bar can be cut down, but not extended), your existing threshold should measure 80mm front to back so the new bar sits in the same footprint, and you need at least 17mm of clearance between the bottom of your closed door and the floor. Check all three before ordering — the 17mm clearance and the 80mm width are the two most people miss.

How do I check whether my existing threshold is 80mm wide?
Open the door and measure straight across the threshold at floor level, from the outer front edge to the inner back edge where it meets your internal flooring. That figure is the width. If it reads 80mm, the Threshex is a direct like-for-like replacement. If it's noticeably narrower or wider, contact us before ordering — the 80mm width is fixed and cannot be trimmed, so a mismatch will leave either an overhang or a gap.

How difficult is it to fit an aluminium door threshold myself?
It's a manageable DIY job. The rubber seals arrive already slid into their channels, and fixing screws are supplied. You'll need a drill, a screwdriver, and a hacksaw if you're trimming to length. Position the bar, mark and drill your fixing points, then screw it down — most people have it done within an hour.

Is this threshold really wheelchair accessible?
Yes. The Threshex profile is Part M compliant under UK Building Regulations, which sets the accessibility standard for thresholds in dwellings. The ramped low-profile edge allows wheelchairs, prams, walking frames, and mobility scooters to cross without a step, and it lowers the trip risk for everyone using the doorway.

Will the rubber seals wear out, and can they be replaced?
The seals are the working part of any threshold and will eventually compress with years of use. Both the small underside seal and the large top seal are slide-in components, so when the time comes they can be drawn out of their channels and replaced without disturbing the aluminium bar or the fixings. That's a five-minute job rather than a full re-fit.

Why Choose the Exitex Threshex Aluminium Door Threshold?

Exitex has built its name on weatherproofing products that go on doing their job long after the cheaper alternatives have failed. The Threshex is a working component, not a decorative one — it takes every footfall through your front door, every downpour that hits your doorstep, and every winter night when the temperature outside drops and the warmth inside wants to escape. Extruded aluminium, an anodised finish, and twin pre-fitted rubber seals mean it handles all three without complaint. Fit it once and the draught is gone, the water stays outside, and the doorway is safe for everyone crossing it.

At JCP Hardware we've supplied door and window hardware to homeowners and the trade for over 30 years, and this is a genuine Exitex product — not a lookalike. If you're unsure whether the 933mm length, the 80mm width, or the 17mm underdoor clearance works for your door, get in touch before you order and we'll talk it through with you.