Description
Once insulation and render are on, the face of the wall sits further out and the old sill no longer reaches past it. The Over Sill Anthracite 2.5m 220mm Depth fits over the existing sill and carries a dark anthracite window sill line out to the new surface. Of the four anthracite depths, 220 mm is the deepest, and it comes in 2.5 m lengths.
Five Reasons to Choose the 220 mm Depth
- The far end of the range. When your site figures point past the 170 mm depth, 220 mm is the next and last step in anthracite.
- One length, 2.5 m. Each piece is cut down on site to the width of the opening.
- Made for dark frames. An anthracite sill sits with dark window frames and with the anthracite verge trim higher up the wall.
- Caps in the same shade. The anthracite end cap pair closes both open ends of a sill.
- The same depth in white. If the scheme changes to white frames, 220 mm is listed in white as well.
The Over Sill Anthracite 2.5m 220mm Depth at a Glance
An over sill, often called an oversill or an external window sill extension, is a flat board with a short upstand along the back and a front edge that turns down. The product photo shows that shape with a cap on each end; all four anthracite depths share the same photo.
| Property | This over sill |
|---|---|
| Colour | Anthracite |
| Depth | 220 mm, deepest of four |
| Length | 2.5 m per piece |
| Shape | Flat board, upstand at the back, front edge turned down |
| End caps | Bought separately: the anthracite end cap pair |
| Matching trim | Anthracite verge trim with upstand, 2.5 m, 140 mm |
All Four Depths, Both Colours
Pick the row for your depth and the column for your frames.
| Depth | Anthracite | White |
|---|---|---|
| 110 mm | Anthracite 110 mm over sill | White 110 mm over sill |
| 140 mm | Anthracite 140 mm over sill | White 140 mm over sill |
| 170 mm | Anthracite 170 mm over sill | White 170 mm over sill |
| 220 mm | This over sill | White 220 mm over sill |
Does Your Wall Need 220 mm?
Being the deepest does not make it the automatic choice for a thick wall. Measure two things at every window before you order:
- how thick the insulation plus render will be at that opening, measured on site;
- how far the current sill stands out from the wall now.
Ring 023 8200 2442 with those figures and the counter settles the depth with you. On an elevation where the windows differ, give the figures opening by opening.
Counting Lengths and Caps
For each sill, divide its width by 2.5 m and round up to whole lengths.
- A 2.1 m sill: one length, cut to size.
- A 5.6 m sill: 5.6 ÷ 2.5 = 2.24, so three lengths.
- Caps: one anthracite pair per sill with two open ends, whether it takes one length or three.
When a sill needs more than one length, agree with the counter how the pieces meet before ordering.
Completing the Dark Trim Set
- Anthracite verge trim with upstand — the matching profile along the top of the wall.
- Anthracite end cap pair — closes the ends of a sill or a verge run.
- Every depth and both colour families are on the window sill extensions page.
Anthracite or White
Match the sill to the frames. Dark frames take this sill with the anthracite verge trim and caps. White frames take the white 220 mm over sill from the table above, closed with the white cap pair.
Help With Fitting
- How to install window sill extensions covers measuring, cutting and closing a sill.
- Render detailing around windows and doors shows how sills, beads and render come together at the reveal.
Ordering, Delivery and Returns
- Dispatch — Renders World processes orders the same day when the stock is there; add the caps to the same order.
- Delivery — the team quotes it after you order; parcels up to 25 kg go next day, left at the kerb.
- Collection — from the counter at Unit 9A, Central Trading Estate, Southampton SO14 5JP, Monday to Friday 7am to 5pm and Saturday 7am to 12pm.
- Returns — 14 days, original condition, for goods bought directly from Renders World; special orders and promotion purchases are excluded.
FAQ
Is 220 mm the depth for thick insulation?
Not by default. Give the counter the insulation and render thickness at the window and how far the old sill projects, on 023 8200 2442, and the depth is agreed before ordering.
Does the photo show the 220 mm depth?
It shows the shape shared by all four anthracite depths. The depth you receive is the one in the title: 220 mm.
Is this an internal window board?
No. It goes outside, over the existing sill, on a wall that has been insulated and rendered.
Do I get end caps with a length?
Order them as their own item: the anthracite end cap pair, one pair for every sill with two open ends.
Is there a white 220 mm over sill?
Yes. Use it with the white end cap pair and the white verge trim.