KILARGO IS4135 THRESHOLD STAIR NOSING - AVAILABLE IN VARIOUS SIZES
KILARGO IS4135 THRESHOLD STAIR NOSING - AVAILABLE IN VARIOUS SIZES
The Kilargo IS4135 is a combined threshold plate and stair nosing for uneven or raised door sills. Used with a Kilargo door bottom seal, it prevents rain, draughts and light penetration while finishing the step edge cleanly and safely.
Key Features
What It's Used For
Use the IS4135 where a doorway lands on a step or raised sill – balconies, older buildings, split-level entries. The nosing profile protects and defines the step edge while the flat face gives the door bottom seal a proper landing.
Combine with a Kilargo door bottom seal for weather and draught control at the same doorway.
Specifications
| Type | Threshold plate / stair nosing |
| Suits | Uneven or raised door sills, step-down doorways |
| Use with | Kilargo door bottom seals |
| Finish | Silver (clear) anodised aluminium |
| Available sizes | 1000mm, 1250mm, 1500mm, 1750mm, 2000mm, 2250mm, 2500mm, 2750mm, 3000mm, 3500mm, 4000mm, 4500mm, 5000mm |
| MPN | IS4135 |
Compliance & What It Means
Does a threshold plate seal the door by itself?
A threshold plate provides the hard, flat (or ramped) sealing surface at the floor - it works together with a Kilargo door bottom seal (automatic drop seal or sweep seal) that closes onto it. The plate stops water tracking under the sill and gives the seal a consistent surface, and the pair together block rain, draughts, smoke and noise.
How is the threshold plate fixed down?
Stainless steel fixing screws and plugs are supplied. Alternatively, most Kilargo thresholds can be bedded in builder's adhesive for a concealed fixing. PVC bedding pads (where supplied) go underneath to eliminate vibration, noise and moisture ingress beneath the plate.
What lengths does the IS4135 come in?
Standard lengths are 1000mm and 2250mm, and it can be ordered in 250mm increments from 1000mm to 5000mm. Plates can also be cut down on site for an exact doorway fit.
What is the handling time for this item?
This is a non-stocked, specialty architectural item ordered directly from the Kilargo factory. Allow a standard handling time of 5–8 business days after cleared payment before dispatch. If your project needs express turnaround, call Prime Hardware on 1800 329 028 to confirm current factory lead times.
I'm not sure this is the right seal for my door — can I get help?
Yes. Door sealing depends on your door type, the gap sizes and what you need to seal against (fire, smoke, sound, weather or drafts). Call Prime Hardware on 1800 329 028 with your door details and gap measurements and we'll confirm the right Kilargo seal, size and finish before you order.
