UPVC (unplasticised PVC) frames are welded at the corners and closed with rubber gaskets, so they seal tightly. In Lahore that matters for dust, road noise and summer heat. They are now common in bedrooms, apartments and houses on busy roads.
What's included
| Item | What it covers | What to confirm |
|---|---|---|
| Profile | Multi-chamber UPVC frame and sash | Chamber count, wall thickness, colour, UV-stabilised for sun |
| Reinforcement | Galvanised steel inside the profile | Present in all frames and sashes, thickness |
| Glass | Single, double glazed or laminated units | Glass thickness and air gap for double glazing |
| Hardware | Multi-point locks, hinges, handles, rollers | Type of opening: tilt-turn, casement, sliding |
| Gaskets | Rubber seals around sash and glass | Seal on all sides |
| Installation | Fixing, packing, foam and silicone | Making good of plaster, removal of old frames |
Styles include casement, tilt-and-turn, sliding windows, French doors and lift-and-slide doors.
When you need it
- Rooms facing a main road or commercial area where noise is a problem.
- Homes where dust control is a priority.
- Air-conditioned rooms where tighter sealing helps cooling.
- Apartments and upper floors exposed to wind and rain.
Step-by-step process
- Share the openings – how many, rough sizes, floor level, photos.
- Site measurement after plaster.
- Choose styles and glass room by room.
- Compare itemised quotes for the same specification.
- Agree payment stages and timeline in writing.
- Fabrication – profiles cut, reinforced and welded.
- Installation – frames fixed, packed, foamed and sealed; glass and hardware fitted.
- Snagging – test every lock and hinge, check corners and seals, then pay the balance.
Approvals and documents
Replacing windows inside your property usually needs no permit. In societies or buildings with elevation rules, check before changing frame colour or opening sizes on the front. Keep the invoice and the written warranty.
What affects the cost
- Profile system and chamber count.
- Steel reinforcement thickness.
- Colour – white is standard; foiled or coloured profiles cost more.
- Glass – double glazing, laminated or tinted glass add cost.
- Opening style – tilt-and-turn and lift-and-slide hardware cost more than fixed or simple casement.
- Size of each unit and total quantity.
- Floor level, access and removal of old frames.
Quotes are usually per square foot or per unit. Ask for dated, itemised quotes and compare like for like.
Questions to ask the fabricator
- Which profile system, how many chambers, and what wall thickness?
- Is steel reinforcement used in every frame and sash?
- What glass build-up for double glazing (glass thickness and gap)?
- Is the profile UV-stabilised for strong sun?
- Which hardware and locks are included?
- What does the warranty cover – profile colour, hardware, glass seal failure?
- Can I visit a recent job in Lahore?
Red flags
- No mention of reinforcement in the quote.
- "Double glazing" without stating glass thickness or gap.
- Frames that are screwed together at the corners instead of welded.
- No site measurement.
- Large advance with no written schedule.
FAQs
Does UPVC turn yellow in Lahore's sun? Lower-grade profiles can discolour over time. Ask whether the profile is UV-stabilised and what the colour warranty says.
Is UPVC better than aluminium? UPVC generally seals better against noise and dust; aluminium is slimmer and better for very large panels. Choose by room.
Can UPVC windows be used for large sliding doors? Yes, with the right sliding or lift-and-slide system and reinforcement. Confirm the maximum panel size the fabricator recommends.
Do UPVC windows need maintenance? Wipe frames, keep drainage holes clear, and lubricate hardware occasionally. Ask the installer for care instructions.
Will double glazing cut noise completely? It reduces noise but rarely removes it. Laminated glass and good sealing around the frame help further.