Description
Window sill end caps white in colour, two to an item: the Verge + Sill End Cap White (Pair) finishes the left and right end of a white over sill or a white verge trim on an insulated, rendered wall, so the run ends cleanly at the window reveal.
Four Reasons to Choose the White Pair
- Listed for the white trims. It belongs to the white family of the range: four over sill depths and the white verge trim with upstand.
- Both ends in one purchase. Left and right come together, so a sill is never left with one open end.
- White against white frames. Cap, sill and trim share one colour, which keeps a white window opening uniform.
- An anthracite version for dark frames. The same item exists in anthracite for the dark trims.
Window Sill End Caps White: Which Trims They Finish
Each white cap has the same shape as its anthracite twin: an L-shaped closure whose long leg ends in a rounded nose turned downwards, with a channel on the inside that receives the end of the trim. It is listed for:
Tell Us the Profile First
A white sill comes in four depths, so call 023 8200 2442 before ordering and give the depth of yours — or say the caps are for the verge trim. The counter confirms the pair for that profile, and the order goes in with the right caps.
Counting Pairs
One pair per run with two open ends. A single sill built from two 2.5 m lengths still needs only one pair; four separate windows need four. Add one pair for each separate run of white verge trim.
White or Anthracite
Pick the cap that matches the trim. White sills and the white verge trim take this pair. For dark frames and the anthracite trims, order the anthracite end cap pair instead.
Installation Guides
- How to install window sill extensions covers measuring, cutting and closing a run.
- Render detailing around windows and doors shows where sill, bead and render meet.
Both colour families are on the window sill extensions page.
Ordering, Delivery and Returns
- Dispatch — orders are processed the same day when the stock is there; add the caps to the basket with the white profiles.
- Delivery — the team quotes it after the order; parcels up to 25 kg travel next day, kerbside.
- Collection — Unit 9A, Central Trading Estate, Southampton SO14 5JP, Monday to Friday 7am to 5pm, Saturday 7am to 12pm.
- Returns — 14 days, original condition, for goods bought directly from Renders World; special orders and promotion purchases are excluded.
FAQ
How many caps come in one item?
Two white caps, one for each end of a run.
Will the pair fit my white over sill?
Give the depth of your sill — 110, 140, 170 or 220 mm — to the counter on 023 8200 2442 and the pair is confirmed for it before the order is placed.
Is this pair for an indoor uPVC window board?
The pair is listed for the white over sills and the white verge trim in this range — the trims fitted outside, on an insulated and rendered wall.
Is there a dark version?
Yes, the anthracite end cap pair, for the anthracite over sills and the anthracite verge trim.

