Home/Questions/Care and maintenance
Care and maintenance · windows · glass · mirrors · shutters

Caring for windows, glass, mirrors and shutters

Almost every sliding-window complaint has one cause — grit in the bottom track, which wears the rollers and makes the sash heavy. Clean the track monthly, give the rollers a light dry silicone spray twice a year, and check the drain holes and silicone before the monsoon: those three habits keep a window light for years. Below: what to do for each item, how often, and what never to do. Installation carries a one-year warranty; service can be called after that too.

Searched as: sliding window cleaning tips, aluminium window maintenance bangladesh, thai window roller problem, mirror edge black — this is that page.

ItemWhat to doHow oftenAvoidMinutes
Sliding tracksBrush or vacuum the grit out of the bottom track, then wipe with a damp cloth; a small brush for the cornersMonthlyHeavy oil or grease — it collects dust10
Rollers and locksA light dry silicone spray; slide the sash gentlyTwice a yearYanking a stiff sash or forcing the lock5
Drain holes and siliconeClear the small holes at the bottom of the outer frame (weep holes); look for cracks or gaps in the siliconeBefore and after the monsoonSealing the holes with silicone10
GlassMild soap and water with a microfibre cloth; dry cloth to finishMonthlyScouring pads, blades, acid cleaners15
Reflective and tinted glassThe coating is usually on the inside face — soft cloth, soap and waterMonthlyAmmonia or harsh cleaners on the coated face15
Royton and sensor LED mirrorsDry the edges after wiping the glass; switch a LED mirror off before cleaningWeeklyWater pooling at the edges; spraying the sensor or LED strip5
Cabinet shutters and hingesDamp cloth on the profile; if a leaf drops, a small adjustment on the hinge screwsEvery three monthsLeaning on or hanging things from the doors10
Mosquito netsSoft brush for dust; lift the net sash out and rinse gentlyEvery three monthsPressing on the net; anything sharp10
Powder-coated and anodised framesSoap and water; a dry cloth on black finishesMonthlyBathroom acid cleaners and thinners — they stain and etch10

Times are for an ordinary flat. Exterior silicone is usually renewed every 3 to 5 years; within the one-year installation warranty we adjust rollers, locks and nets ourselves, and after that on a service call with the cost stated first.

The five mistakes that do the most damage

Oiling the track

Oil or grease pulls in dust and turns to paste; rollers wear fast. A dry silicone spray, and only a little.

Blocking the drain holes

The holes at the bottom of the outer frame let rainwater out; blocked with silicone or dust, the water comes inside.

Acid cleaners

Splashes of toilet or tile acid leave white marks on anodised aluminium and etch black powder coat — nothing but soap and water on glass and frames.

Forcing a heavy sash

A heavy sash means grit in the track or a worn roller; forcing it breaks the roller. Clean the track first; if still heavy, call for service.

Water at the mirror edge

Steam and water standing at the edge attack the backing of an ordinary mirror; copper-free Royton delays it, and dry edges delay it further.

A 30-minute monthly routine

WhenWhatTime
Every monthAll sliding tracks cleared, glass and frames washed with soap and water25 min
Every weekMirror edges dried, LED mirror wiped switched off5 min
April, before the monsoonDrain holes cleared, exterior silicone checked for cracks, rollers sprayed20 min
October, after the monsoonTracks dried, nets rinsed, hinges adjusted30 min

For service, a photo and a line on WhatsApp is enough — free within the warranty, otherwise the cost is stated before the visit.

When something goes wrong

  1. Sash heavy or sticking: clean the track first; if it persists the roller needs adjusting or replacing — a service call.
  2. Water on the sill in rain: check the drain holes and the silicone; send a photo of any gap and the silicone is renewed.
  3. Net torn: only the net is replaced, the frame stays; a stainless steel net does not tear.
  4. Cracked glass: the pane size is on our cutting list — new glass to the same size, usually in 1 to 2 days (7 to 10 if tempered).
Chandrima Udyan — MAX 4-inch sliding window installed by us
Chandrima Udyan — MAX 4-inch sliding window installed by us
Sliding window — reference for the type
Sliding window — reference for the type

Questions we are asked

Why does the sash get heavy?
Grit in the bottom track gets under the rollers and cuts into them; a worn roller then drags. Monthly track cleaning usually prevents it; once it happens the roller is adjusted or replaced.
Can I use bathroom acid cleaner near the window?
No — splashes leave white marks on anodised frames and etch black powder coat, and it does not come off. Mild soap and water only, on windows and mirrors alike.
Why does water come in under the window in rain?
Most often blocked drain holes or a gap in the exterior silicone. Clear the holes; if the silicone is cracked, send a photo and it is renewed.
Does a torn mosquito net mean a new frame?
No — the net sash comes out and only the net is replaced; a stainless steel net avoids tearing and rust altogether.
Why are the mirror edges going black?
Steam and water standing at the edge attack the mirror's backing. Copper-free Royton mirror delays it considerably, and keeping the edges dry delays it further.

For service, a photo is enough

A photo of the problem and the area — free within the warranty, otherwise the cost is stated before the visit.

Updated 19 September 2026 · rates valid from 16 August 2026

CallWhatsApp