Choosing the best window replacement in Blenheim usually comes down to two routes: retrofitting double glazed units into the frames you already have, or replacing the joinery outright with new aluminium windows. The businesses below cover both, from full house lots of thermally broken joinery through to single reglazing jobs, along with entrance doors, balustrades and safety glass. Envision Aluminium and Dawson Aluminium manufacture their joinery in Blenheim, while Marlborough Glass handles retrofit and reglazing work across the wider region.
1Envision Aluminium Ltd
Envision Aluminium is a locally owned manufacturer and installer of Vantage aluminium windows and doors, run by Steve and Tracy Smith from a purpose built factory on Waters Avenue in Blenheim. The team of fifteen produces joinery for both renovations and new builds, and quotes on installation or supply only. It suits homeowners replacing a whole house lot of windows who want the joinery made in Marlborough rather than trucked in.
Services
- Aluminium window and door replacement for renovation projects
- Vantage Residential Series, Metro Series and APL Architectural Series joinery
- ThermalHeart+ thermally broken window and door frames
- Klima uPVC windows and doors
- Entrance doors, hardware and glass selection
Highlights
- Locally owned and operated, with a purpose built factory opened in October 2022
- Registered Master Builders member
- Member of the Windows and Glass Association New Zealand
- Sitewise Gold certified
- Apprentices trained through BCITO have taken national most promising apprentice and apprentice of the year awards
Location & Contact
Name: Envision Aluminium Ltd
Address: 30 Waters Avenue, Blenheim
Phone: 03 578 3650
Website: envisionaluminium.co.nz
2Dawson Aluminium
Dawson Aluminium is an Altherm Windows and Doors specialist based in the Burleigh industrial estate on New Renwick Road. The range runs from awning and casement windows through to bay, box and custom designed units, and the company lists replacement joinery alongside its new build work. It supplies housing companies and builders around Marlborough, and keeps colour and finish samples at its Blenheim showroom.
Services
- Replacement aluminium joinery for existing homes
- Awning, casement, horizontal sliding and vertical bi-fold windows
- Greenhouse, box, bay and custom designed windows
- Roof and overhead glazing
- Entrance, hinged, french, bi-fold, sliding and twin slider doors
Highlights
- Specialist manufacturer for the Altherm Windows and Doors system
- ThermalHeart+ thermally broken frames and the Klima uPVC range both available
- Dulux powdercoating with a 15 year film and colour integrity warranty on Duralloy +PLUS and Protexture finishes
- Showroom where colour swatches and surface finishes can be compared in person
Location & Contact
Name: Dawson Aluminium
Address: Burleigh Industrial Estate, New Renwick Road, Blenheim
Phone: 03 579 1000
Website: dawsonaluminium.co.nz
3Marlborough Glass
Marlborough Glass is a family owned glazier working from a factory at 44 Main Street, founded in 2013 by Josh and Michelle Cody. Retrofit double glazing into existing timber or aluminium joinery is one of its core lines, sitting alongside reglazing, balustrades and frameless showers. The same owners run HomePlus Blenheim and the Novus auto glass branch next door, so screens, wardrobes and windscreens are handled from the same site.
Services
- Retrofit double glazing into existing timber or aluminium joinery
- Window reglazing and glass replacement
- Glass balustrades
- Frameless glass showers and splashbacks
- Security screen doors, insect screens and wardrobe fit outs through HomePlus
Highlights
- Master Glaziers member
- Family owned and operated since 2013
- 24 hour, seven day glass replacement and repair service
- Covers the Top of the South from the Marlborough Sounds to Arthur’s Pass
Location & Contact
Name: Marlborough Glass
Address: 44 Main Street, Blenheim
Phone: 03 578 5374
Website: marlboroughglass.co.nz
4The Glassman 2014 Ltd
The Glassman is a Master Glazier business on Grove Road in Mayfield, covering residential, commercial, automotive and marine glazing throughout Marlborough. For window work it retrofits high performance double glazing into existing timber or aluminium frames, and also handles safety glass, glazing for additions and renovations, and insurance claim work. Consultation and quote appointments can be booked through its website.
Services
- Retrofit double glazing into existing timber and aluminium frames
- Residential and commercial glazing
- Safety glass supply and installation
- Glazing for additions and renovations
Highlights
- Team of qualified Master Glaziers
- More than 30 years of glazing experience
- 24 hour emergency service
- Free measure and quote
- Insurance claims on glass work handled directly
Location & Contact
Name: The Glassman 2014 Ltd
Address: 10 Grove Road, Mayfield, Blenheim
Phone: 03 578 5500
Website: theglassmanblenheim.co.nz
5Glass and Window Solutions
Glass and Window Solutions is a retrofit double glazing and aluminium joinery specialist based at Estuary Place in Richmond, near Nelson, whose service area takes in Blenheim and the wider Marlborough region. As well as retrofitting double glazed units into existing single glazed aluminium and timber windows, it offers aluminium window inserts where a straight retrofit is not the better option. The company is a fully approved agent for the Nulook aluminium joinery system, which makes it a fit for owners wanting the whole house lot supplied and installed by one team.
Services
- Retrofit double glazing into existing aluminium and timber windows
- Aluminium window inserts as an alternative to retrofitting
- Nulook aluminium windows, doors and sliding doors
- Glass balustrades, showers and splashbacks
Highlights
- Fully approved agent for the Nulook aluminium joinery system
- Retrofit specialists covering Nelson, Tasman, Marlborough, Golden Bay, Murchison and the West Coast
- Previously traded as nulook Solutions before rebranding to Glass and Window Solutions
Location & Contact
Name: Glass and Window Solutions
Address: 24 Estuary Place, Richmond, Nelson
Phone: 03 538 0100
Website: www.glassandwindowsolutions.co.nz
Window Replacement in Blenheim at a Glance
| Business | Based in | Highlight |
|---|---|---|
| Envision Aluminium Ltd | Blenheim | Locally owned and operated |
| Dawson Aluminium | New Renwick Road | Specialist manufacturer for the Altherm Windows and Doors system |
| Marlborough Glass | Blenheim | Master Glaziers member |
| The Glassman 2014 Ltd | Mayfield | Team of qualified Master Glaziers |
| Glass and Window Solutions | Richmond | Fully approved agent for the Nulook aluminium joinery system |
How to Choose the Right Window Replacement in Blenheim
- Work out early whether retrofitting double glazed units into your existing frames or replacing the joinery outright suits the house, because the two jobs are quoted and carried out quite differently.
- Ask whether the joinery is manufactured locally or ordered in, since local manufacture usually means shorter lead times and a simpler fix if a unit needs remaking.
- Check which system and series is being quoted, such as Vantage, Altherm or Nulook, and whether thermally broken frames or uPVC are on the table, as both affect price and thermal performance.
- Confirm the quote covers removal of the old joinery, installation and making good the linings and exterior cladding, not just supply of the windows themselves.
- Look for membership of a recognised trade body such as the Windows and Glass Association or Master Glaziers, and ask what warranty applies to the frames, the glass units and the powdercoat finish.
Frequently Asked Questions About Blenheim Window Replacement
What is the difference between retrofit double glazing and full window replacement?
Retrofit double glazing keeps your existing timber or aluminium frames and swaps the single pane for a sealed double glazed unit. Full replacement removes the old joinery entirely and installs new frames and glass. Retrofitting is usually the cheaper route and keeps the character of an older home, while full replacement lets you change the frame material, the opening style and the thermal performance of the frame itself.
Do I need building consent to replace windows in Blenheim?
Replacing a window like for like in an existing opening can fall under the Schedule 1 exemptions in the Building Act, but this depends on the specifics of the work. Altering the size of an opening, or anything that touches a structural element, generally does need consent. Check the current exemption guidance on the Building Performance website and confirm with Marlborough District Council before work starts.
Can double glazing be retrofitted into timber joinery?
Yes. Both Marlborough Glass and The Glassman retrofit double glazed units into existing timber as well as aluminium frames. The frames need to be sound, so a glazier will check the condition of the timber and the depth of the rebate before quoting, and in some cases the frames are routed out to take the thicker unit.
What does window replacement cost in Blenheim?
None of the companies listed here publish fixed pricing, because the cost depends on how many windows are involved, the frame material, the glass specification and whether the job is a retrofit or a full joinery replacement. Free measure and quote is standard practice locally, so getting two or three written quotes on the same specification is the practical way to compare.
Will double glazing stop condensation?
It reduces it rather than eliminating it. Double glazing keeps the inside pane closer to room temperature, so far less moisture condenses on the glass, which is why it is often recommended for older homes with mould and mildew problems. Ventilation and heating still matter, and condensation can still appear on frames that are not thermally broken.
What is a thermally broken window frame?
A thermally broken frame has an insulating barrier built into the middle of the aluminium profile, separating the cold outside face from the warm inside face. Aluminium conducts heat readily, so without that barrier the frame itself becomes a weak point even when the glass is double glazed. Both Vantage and Altherm supply thermally broken options through their Blenheim manufacturers.
Do Blenheim glaziers handle insurance work for broken windows?
Yes. The Glassman lists insurance claims on glass work as a service, and Marlborough Glass runs a 24 hour, seven day glass replacement and repair service across the Top of the South. If a window has been broken rather than simply reaching the end of its life, it is worth mentioning the claim at the first phone call so the paperwork is set up correctly.
How We Chose the Best Window Replacement in Blenheim
Every business in this guide was found by searching for window replacement in Blenheim, then checked against its own website. Names, addresses and phone numbers are taken from the business’s own site rather than a directory feed, so what you see here is what they publish themselves. We also check that each one is actually based in or genuinely serving Blenheim, rather than a national operator running a local landing page. A business with no website of its own is not listed, because there is no primary source to verify it against.