Window Defects at VP
Leaks, Seals, Alignment & Locks in a New Home (2026)

What window defects look like at VP

Most window defects in a new unit are small, visible and easy to miss on a busy key-collection day. A sliding sash that drags or jumps on its track. A casement that has to be shoved before the handle will turn. A lock that spins without throwing the latch. A thin line of daylight down one side of a closed sash. Sealant around the outside of the frame that stops short of a corner, or a gasket that has shrunk back and left a gap. Glass with a scratch you can catch with a fingernail, a chip at the edge, or a pane that rattles in its bead. Powder coat that is dented or scraped through to bare aluminium. And, most expensive later, a bottom track where water sits instead of draining outside.

None of these needs special equipment to spot. What they need is a slow walk round every window, in daylight, with the window opened and closed fully. If you would rather have someone else do that walk with you, our defect inspection service in KL & Selangor covers every window in the unit as part of the wider check.

Why new windows go wrong

Windows in Malaysian homes are mostly powder-coated aluminium, fitted late in the build when the walls are plastered and other trades are still working. Three things cause most VP defects. First, installation: a frame fixed slightly out of square makes the sash bind at one corner and gap at the other, and no amount of adjustment fully cures it. Second, sealing: the perimeter joint between frame and wall is often run quickly, skipped at awkward corners, or smeared over the weep holes at the bottom of the frame. Third, site damage: plaster, paint and grit left in tracks, glass scratched while other trades worked, and frames knocked by scaffolding or materials.

The window repair guide explains why alignment matters so much: a sash that meets the jamb hard at the top and shows daylight at the bottom is telling you the sash, the frame or both are out of square, and new hardware will not make it weather-tight until that is corrected. At VP that is the developer's problem to correct, not yours.

How to check each window at VP

Work room by room and give every window the same five checks. Note the room and the window position (for example "bedroom 2, left casement") as you go, so the defect list is clear later. The checklist tool lets you tick your defects room by room and keeps the list in order.

Water at the sill: weep holes and the pour test

Aluminium windows are designed to let a little water into the frame and drain it back out through small slots on the outside face, the weep holes. If those slots are blocked with plaster or paint, or have been sealed over, the frame fills and overflows onto your sill in the first storm. The handover water check guide describes the simple test: pour water into the track and watch whether it drains outward or inward.

A dry day at VP will not show a wind-driven leak, so a passed pour test is not the end of the story. Note any staining on the sill or the wall below the window, any tide marks inside the track, and any damp skirting beneath. If a window leaks later in the DLP, the window leak repair guide explains how the entry point is found by staged hose testing rather than by adding sealant.

Sealant and gasket gaps

There are two different seals on every window. The gaskets are the rubber strips that seal the sash against the frame and hold the glass. The perimeter seal is the sealant joint between the outside of the frame and the wall. At VP, look for a perimeter bead that is missing at corners, has pulled away from the wall, is cracked, or was smeared thinly over dirt and plaster. Look for gaskets that have shrunk back from the corners or been cut short.

Sealant defects are small to look at and cause most window leaks. A proper repair cuts the old bead out, cleans the joint and runs a new one; the silicone resealing guide explains why sealing over old sealant fails. Never accept new sealant run across the bottom of the outer frame: that blocks the drainage that keeps the frame dry.

Alignment, rollers, stays and locks

Sliding windows ride on rollers in a track. At VP the usual faults are grit and plaster in the track, rollers set too low so the sash drags, and a sash that does not meet the side jamb evenly. Casements hang on friction stays that carry the sash and stop it slamming. A stay that is the wrong length, loose or bent makes the window stiff or unwilling to stay open. Handles and locks should engage cleanly, without a shove.

Clean the track first before you list a sticking sliding window; some VP stiffness is just construction dust. If it still drags after cleaning, list it. If a lock only works when you push the sash hard, the keep or the sash is out of line, and that is a defect even though the window does lock.

Glass, coating and frame damage

Look at each pane at an angle against the light, inside and out where you can reach safely. Scratches from scrapers and grit are common on new glass. Note chips at the edge of a pane and any crack, however short; a crack can spread. Check that the glass sits firmly in its bead and does not rattle. Run a hand along the frame and look for dents, scrapes through the powder coat, and splashes of cement or paint that have marked the finish. Coating damage matters because bare aluminium marks and corrodes over time.

Defect or normal? What to list

Use plain, qualitative judgement. If a fault affects how the window works, keeps water out, locks, or will get worse, list it. If it is cosmetic but clearly visible from normal standing distance, list it too. If it is construction dust or something you caused, it is not a developer defect.

How to word it on the defect list

Each line should let the developer's team find the window and understand the fault without a call. Give the room, the window, the fault and what you expect to see fixed. For example:

• Master bedroom, sliding window facing balcony: sash drags and jumps the track after cleaning; please adjust or replace rollers and re-align.
• Bedroom 2, left casement: handle does not engage the keep unless sash is pushed; daylight visible along the hinge side when closed.
• Living room, fixed pane right of door: scratch across the glass at eye level, can be felt with a fingernail.
• Kitchen window: perimeter sealant missing at bottom left corner outside; weep holes sealed over with sealant.
• Bedroom 3 window: powder coat scraped through to bare aluminium on the inner frame, lower edge.

Send the list in writing and keep a copy. The defect liability period guide explains how to report correctly and why verbal complaints are not enough.

What the developer's repair should look like

When the contractor comes back, check the work before you sign it off. A sticking sash should be re-hung or re-rollered so it runs smoothly and meets the jamb evenly, not just sprayed with lubricant. Locks should be adjusted so they engage without force. Damaged glass should be replaced, not polished until the scratch is harder to see. Sealant should be cut out and re-run as a continuous bead, with the weep holes left open. Coating damage should be properly touched up or the section replaced if it is extensive. Re-test each window the same way you tested it at VP.

If the defect comes back

A window that sticks again, or leaks again after a repair, is a fresh report: list it again in writing while you are still within the 24 months, and note that it is a repeat. If water is involved and the source is unclear, leak detection by ClickBina is RM300 – RM800 per visit. That is a separate service from any repair. After the DLP ends, repairs are yours to arrange; these published ClickBina figures (indicative 2026, Klang Valley) show what typical window work costs:

How ClickBina helps with window defects

We inspect new homes and subsale units across KL & Selangor, test every window as part of the check, and write the findings so they can go straight onto your defect list. Because ClickBina is an experienced KL & Selangor contractor for whole-house refurbishment and trade coordination, the team that finds a defect can also put it right when the developer will not, or after the DLP. WhatsApp us your unit type, size and VP date for an inspection quote; we reply within the hour, we are registered with SSM, and the price we agree is a flat price with no hidden charges. For repair work a site visit is RM150, waived if you go ahead.

Sources & methodology

• ClickBina defect liability period guide — the 24-month DLP from vacant possession and written reporting.
• ClickBina window repair guide — alignment, stays, rollers, gaskets vs perimeter seal; casement replacement price.
• ClickBina window leak repair guide — weep holes, re-sealing method and window repair prices.
• ClickBina handover water check guide — the track pour test and the leak detection fee.

Methodology: checks are simple owner checks that need no tools. Defect-or-normal guidance is qualitative; no measured tolerance is given because none is published on the pages above. Prices are ClickBina indicative 2026 Klang Valley ranges from the guide named beside each. This is not legal advice.