Description
The WK-DS050 is a 50 mm plastic spiral anchor made by Klimas for fixing light items — a house number, a letter box, an outdoor light — to a wall insulated with polystyrene. It screws straight into the insulation, holds up to 5 kg per anchor and comes ten to a bag, alongside the other EWI fixings at Renders World.
What the WK-DS050 Spiral Anchor Holds
Klimas makes the WK-DS for light, non-structural items on the facade of a polystyrene-insulated wall, with a limit of 5 kg for each anchor. The maker's own examples are:
- signs and house numbers;
- letter boxes;
- outdoor lights and motion sensors.
It is not made for structural fixings, or for anything that takes strong, changing forces — shutters, blinds and window awnings are the examples Klimas gives. Those need a fixing that reaches the wall behind the insulation.
Why Fit a Spiral Anchor on an Insulated Wall
- No cold spot at the fixing. The spiral anchor stays inside the insulation, so the insulation layer runs on unbroken behind the item and no thermal bridge forms there.
- No long plug through to the masonry. The item is held in the polystyrene layer itself, so a light fitting does not need a fixing long enough to reach the wall behind.
- A 28 mm collar. Every anchor has a 28 mm plate at its head, the same on both lengths.
- A body made for outdoors. The anchor is polyamide, which Klimas uses for its resistance to changing weather.
- Ordinary tools. It goes in with a drill-driver and a TORX-30 bit, and the item is then held with a 4.5 mm screw.
WK-DS050 Specification
| Property | Value |
|---|---|
| Product code | WK-DS050 |
| Maker | Klimas Wkręt-met (KLIMAS Sp. z o.o., Poland) |
| Type | Screw-in spiral fastener for polystyrene insulation |
| Length | 50 mm |
| Collar diameter | 28 mm |
| Drive | TORX-30 |
| Screw for the item | Ø 4.5 mm, not included |
| Material | Polyamide |
| Maximum load | 5 kg per anchor, non-structural items only |
| Pack | 10 anchors in a bag |
| GTIN | 5907704473343 |
How to Fit the WK-DS050
Mark every fixing point on the facade first. Then use one of two methods, depending on how far the wall has got:
- New wall, before the base coat: screw the anchor into the insulation before the adhesive and the reinforcing mesh go on.
- Finished, rendered wall: drill through the base coat with its mesh and through the render with a concrete drill bit, then screw the anchor into the insulation underneath.
Drive the spiral anchor in with the TORX-30 bit, then fix the item to it with a 4.5 mm screw. How mechanical fixings fit into the rest of an insulated wall is set out in the EWI fixings installation guide.
WK-DS050 or WK-DS085?
Renders World stocks the WK-DS as a 50 mm and an 85 mm anchor, and length is the only difference between them. Look at how deep the polystyrene is where the item will go, then pick the anchor.
| Anchor | Length | Collar | Drive | Screw | Max load | Pack |
|---|---|---|---|---|---|---|
| WK-DS050 (this pack) | 50 mm | 28 mm | TORX-30 | Ø 4.5 mm | 5 kg | 10 |
| WK-DS085 | 85 mm | 28 mm | TORX-30 | Ø 4.5 mm | 5 kg | 10 |
The longer spiral anchor does not carry more weight. Both are rated for up to 5 kg each.
Ordering, Delivery and Collection
- Dispatch: orders go out the same day when the anchors are in stock.
- Delivery: after the order, the team contacts you with the most cost-effective way to send it; small parcels up to 25 kg can go next day. Every delivery is kerbside.
- Collection: pick them up from the counter at Unit 9A, Central Trading Estate, Southampton SO14 5JP — Monday to Friday 7am to 5pm, Saturday 7am to 12pm.
Add one 4.5 mm screw for each anchor to the order, sized to the item you are mounting. Changed your mind? Spiral anchors bought from Renders World can come back in their original condition within 14 days — the details are on the cancellations and returns page.
Is the WK-DS050 Right for the Job?
- Yes — for a light item, up to 5 kg, on a wall insulated with polystyrene, such as boards from the EPS insulation boards range.
- Take the longer one — when you want the 85 mm body: the WK-DS085 spiral anchor has the same collar, drive, screw and load.
- No — for structural fixings and for items that take strong, changing forces, such as shutters, blinds and awnings.
FAQ — WK-DS050 Spiral Anchor
Is a screw included?
No. The bag holds ten anchors. Each item is fixed with a 4.5 mm screw that you buy separately, long enough for what you are mounting.
How much weight can one anchor hold?
Up to 5 kg, and only for non-structural items such as numbers, letter boxes, lights and sensors.
Can I fit it into a wall that is already rendered?
Yes. Drill through the render and the base coat with a concrete drill bit, then screw the spiral anchor into the insulation behind.
What tool do I need?
A drill-driver with a TORX-30 bit sets the anchor. The item then goes on with a 4.5 mm screw.
Does it make a cold spot in the insulation?
Klimas makes the spiral anchor to stay within the insulation layer, so the insulation stays continuous at the fixing point and no thermal bridge forms.
Technical Documentation for the WK-DS050
- Klimas WK-DS product page and product data sheet — sizes, use and fitting method for both lengths.