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Alexander Constructors

0 review(s)
Offers services in CORNWALL
South Wales, Penarth based design and build contractor. Projects completed include new houses, extensions, kitchens, bathr...
Verified Pro

Lets Talk Windows & Doors

1 review(s)
Offers services in CORNWALL
We are a Home Improvements company specialising in replacement Windows and Doors, refurbishment and new build Conservatori...
Over 20 Reviews
Quality Windows, Doors & Conservatories across Cornwall, Devon & Somerset. 10+ years experience. Trust a Trader Scheme. Ul...

R & G INSTALLATIONS SW

0 review(s)
Offers services in CORNWALL
R&G Installations SW Ltd are a family run, South - West based installation company specialising in conservatories and high...

Recent Window Installer Enquiries

30 Jun

Windows | uPVC

Torpoint - PL11

Enquiry from: Kate G

Start Date: Immediate

Call anytime. Number of windows: 4 Quote requested on windows, in PVCu, to be supplied and fitted.

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30 May

Windows | Glazing

Looe - PL13

Enquiry from: James T

Start Date: Immediate

I need three double glazed panes replaced due to misting up.

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24 Apr

Windows | Glazing

Penzance - TR18

Enquiry from: Becky C

Start Date: Immediate

Last night I noticed that the glass in my attic Velux window had shattered. I’m not sure how it happened.

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19 Apr

Windows | uPVC

Penzance - TR19

Enquiry from: Rachel B

Start Date: Immediate

Customer made an online enquiry for replacement windows via one of our websites. Confirmed via email/SMS/. 2+ windows Supply and install Please call to arrange an appointment to quote.

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18 Apr

Windows | uPVC

Truro - TR1

Enquiry from: John M

Start Date: Immediate

how many windows do you need: 2-3 windows property type: other

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10 Apr

Windows | Wooden | Repair

Penzance - TR20

Enquiry from: Lizzie N

Start Date: Immediate

Wooden window repair Lead

Repairs to 3 x 1st floor wooden windows, approx. 113cm x 88cm. Probably from 1980s 0r 90s although property much older. Accessible from conservatory roof

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29 Mar

Windows | uPVC

Newquay - TR7

Enquiry from: Jamie B

Start Date: Immediate

Customer is looking to get quotes for replacement double glazing. multiple windows Supply and install Please call to quote.

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18 Mar

Windows | uPVC

St. Austell - PL25

Enquiry from: Deb C

Start Date: Immediate

Customer made an online enquiry for replacement windows via one of our websites. Confirmed via /phone. 2+ windows Supply and install Please call to arrange an appointment to quote.

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17 Mar

Windows | Glazing

St. Ives - TR26

Enquiry from: Graham C

Start Date: Immediate

3 panes one window with 1 window with two panes are you the property owner: owner of the property property type: detached are you looking for glaziers: yes how many units do you do you require: 2-...

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17 Mar

Windows | Wooden

St. Ives - TR26

Enquiry from: Graham C

Start Date: Immediate

customer in st. ives areas is looking to do a couple of projects at the moment, and would like quotes for wooden windows.confirmed interest via email at 17/03/2026 17:22.please call to arrange appoint...

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17 Mar

Windows | uPVC

St. Ives - TR26

Enquiry from: Graham C

Start Date: Immediate

customer in the st. ives area made an enquiry a couple of projects including upvc double glazing.call anytime and arrange an appointment to discuss. below is some details about this project: are you t...

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11 Mar

Windows | Glazing

Penzance - TR20

Enquiry from: Hazel H

Start Date: Immediate

Quote pls for replacement glass to Velux Window

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19 Feb

Windows | uPVC | Repair

Redruth - TR15

Enquiry from: Dave R

Start Date: Immediate

A flat roof velux with rain sensor, needs to be checked as it doesn't open, possible motor burnt out

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04 Feb

Windows | uPVC

Helston - TR13

Enquiry from: Barbara C

Start Date: Immediate

Customer living in Helston area made an enquiry for double glazing quotes via one of our websites. Customer confirmed interest via Homeowner needs advice on options 2+ windows Supply and install Plea...

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03 Feb

Windows | uPVC

Helston - TR12

Enquiry from: Zoe H

Start Date: Immediate

Customer in Helston area made an enquiry for double glazing online. 2+ windows Supply and install Please call to arrange an appointment to discuss options

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31 Jan

Windows | uPVC

Helston - TR13

Enquiry from: Penelope W

Start Date: Immediate

Customer made an online enquiry for replacement windows via one of our websites. Confirmed via . 2+ windows Supply and install Please call to arrange an appointment to quote.

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31 Jan

Windows | uPVC

Penryn - TR10

Enquiry from: Inga I

Start Date: Immediate

Customer is looking to get quotes for replacement double glazing. multiple windows Supply and install Please call to quote.

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30 Jan

Windows | uPVC

Truro - TR1

Enquiry from: Ishwor K

Start Date: Immediate

Customer made an online enquiry for quotes for double glazing replacement via one of our websites. Customer lives in Truro area and is considering a range of options for their home. 2+ windows Supply ...

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26 Jan

Windows | uPVC

St. Austell - PL25

Enquiry from: Char W

Start Date: Immediate

What best describes your living situation? - -. How many windows are you considering replacing? - -. What material do you require, UPVC? - -. What colour do you want them to be? - --. Do you require d...

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23 Jan

Windows | uPVC | Repair

Saltash - PL12

Enquiry from: Rob C

Start Date: Immediate

Repair to double window with locking mechanism not working

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How much do Window Installer services cost?

How much do Window Installers cost? Prices for Window Installers in 2026 can differ relying on the kind of task that you require to have performed in your house. It's the inquiry we get asked a whole lot "how much do Window Installers charge?". It's generally very good to have an idea of how much a Window Installer are going to likely charge for their services. Prices will probably rise and fall based upon the products and also the tradesman selected. The table reveals the sorts of service that Window Installers typically do and also the typical cost range of these jobs. Some tasks take longer to complete than others so prices do fluctuate by task.

View our Window Installer cost guide View our Window Installer advice

The average price
of a Window Installer in Cornwall is:

£2,082

Window Installer job Window Installer cost in 2026
Double glazing in Cornwall £1,500-£5,000
Upvc double glazing units only in Cornwall £800-£1,200
Triple glazing in Cornwall £1,500-£5,000
Aluminium windows in Cornwall £1,875-£2,875
Wooden window in Cornwall £3,750-£5,750
Aluminium windows supply only in Cornwall £2,600-£3,900
Upvc or wood porch in Cornwall £2,625-£4,025
Sash window in Cornwall £1,800-£6,000
Glaziers in Cornwall £57-£87
Secondary glazing in Cornwall £1,500-£5,000
uPVC Single Window in Cornwall £225-£345
Wooden sash windows in Cornwall £3,750-£5,750
Wooden windows supply only in Cornwall £2,760-£4,140
Aluminium repair in Cornwall £240-£360
Window repair in Cornwall £268-£402
Wooden window repair in Cornwall £320-£480

Related Window Installer searches in Cornwall

Window Installer FAQs

Will double glazing increase my property’s value?

These days, buyers expect homes to have double glazing. People recognise the benefits of installing double glazing, so if you don’t have it installed you should consider it. You’ll increase your property’s value and give it a better chance of selling faster, since single glazed properties are also more likely to have problems with damp and mould which could put buyers off.

how to fit a double glazed window?

Did you just purchase a double glazed window and confused about how to have it installed? Fitting the window yourself can be quite easy with the help of this step by step guide. However, if you lack proper training or experience, we’d recommend you reach out to a trustworthy professional who can guarantee the best results for help. That said, now let’s take a look at the process.

• Remove the old windows by detaching the old beading and glass window safely. Then make some interval cuts using a hand saw before using a crowbar to pry it out.

• Cut the external double glazed window seal. Once done, take a measurement of the window area’s width once empty. Then transfer the measurement to the window sil to face outside and cut using a handsaw.

• Seal the window sil. Add a bead of clear silicone along both inside lip as well as the centre to seal the sil.

• Screw the double glazed window to the sil. Position the window on the top of the lipped section that was siliconed. Then pre-drill them together and screw in three places. You should make sure the screws do not go totally to the sil’s bottom.

• Install the double glazed window. After successfully screwing the double glazed window to the sil, you can now fit in the double glazing. Make use of packers to make sure it’s even in the slot.

• Screw the uPVC window to the wall. If you’re happy and satisfied with the position of the window, you can then pre-drill through the frame of the window and the brick wall. Once done, simply screw it in place using masonry screws or Spax screw as they do not require crawl plugs in bricks.

• Seal around the window. To do this, simply fill any gaps with expanding foam, wipe out the excess and seal with silicone.

What are the other double glazing options?

Double glazing frames don’t just have to come in uPVC and are available in other materials including aluminium and wood too. Wooden or timber windows are more suited to properties with a traditional look and are often the frame of choice for listed buildings and homes in conservation areas. When properly maintained wooden windows can last well for years but can be up to three times more expensive than uPVC.Aluminium is the strongest and most durable option. As a metal it is highly resistant to the UK’s changing weather conditions and won’t rust, warp, crack or peel. Aluminium offers a modern appeal and is available in a range of colours.

Should I get all my windows replaced at once?

You don’t have to, especially if you’re on a budget. If you’re only replacing some, it’s a good idea to get all the windows on one side of your property replaced at the same time, so they all look the same. Be aware, obviously, huge savings could be had by having a number of windows replaced at the same time.

how to repair or replace a double glazed unit?

Are you about to purchase a double glazed unit and wondering how to go about the replacement project? If yes, then you’re at the right place. Firstly, it’s advisable to hire the services of a reliable professional who can guarantee the best results for help especially if you lack proper training and experience in the field. However, we’ve put together this step by step guide to provide you with a detailed information about the double glazed unit replacement process. Let’s get started!

The tools and materials you require for the project includes tape measure, hammers, nail punch, scraper, spacing blocks, non-hardening butyl putty, high-security glazing tape rolls and beading tacks.

• Work out the glass size required. Simply use the tape measure to measure from frame edge to frame edge while also taking note of the thickness.

• When about to order, inform the glass merchant that the measurement provided are frame-tight. This will make him reduce the dimension a little bit, mostly by 5mm for clearance.

• Remove the beading and ensure to support the glass while doing so. If the glass units are fitted in wooden windows, you may need to cut the putty-based compound they’re normally sealed with to remove the glass.

• Lay out the beading in the window’s shape to make for easier refitting later on.

• If you’re working on wooden frames, wipe out all traces of excess installation compound using a scraper and clean the rebate with a soft brush.

• Trial fit the double glazed windows to ensure they’d slide into the frame without being forced.

• Plastic frame windows are usually in between a pair of gaskets, you should replace this with a hight security glazing tape. While for a wooden frame, simply apply strips of flexible non-setting butyl putty or high-security glazing tape on either sides of the glass.

• Install and centralize the glass in the frame.

• Press the nail wooden beading or plastic beading back into place.

What are the other double glazing options?

Double glazing frames don’t just have to come in uPVC and are available in other materials including aluminium and wood too. Wooden or timber windows are more suited to properties with a traditional look and are often the frame of choice for listed buildings and homes in conservation areas. When properly maintained wooden windows can last well for years but can be up to three times more expensive than uPVC.Aluminium is the strongest and most durable option. As a metal it is highly resistant to the UK’s changing weather conditions and won’t rust, warp, crack or peel. Aluminium offers a modern appeal and is available in a range of colours.

What to put over a broken window?
A broken window is a nuisance and an unwanted expense, and it can often happen at the worst times, like overnight when installers aren’t available or when the weather is very bad. So you might need to put something over your broken window as a temporary measure before someone can come and replace it – but what should you use? If you’ve got a small crack, you could try using some masking tape. Cover the entire crack with the tape making sure that there is extra tape at each end of the crack. This will help to prevent the crack from growing further. However, this isn’t going to work on large impact cracks or shattered windows. For a shattered window, you need to make sure you remove all the remaining glass as the shards could easily cut someone. To make a broken window like this safe, you’ll need:
  • Thick gloves
  • A hammer
  • A broom
  • A vacuum cleaner
  • Thick-soled shoes
  • Safety goggles
  1. Put your gloves on and use the hammer to remove the rest of the glass. Make sure you hit the glass away from you.
  2. Using the broom, sweep away any loose glass from the area, making sure you do both inside and outside.
  3. Use your vacuum cleaner to remove any small pieces of glass that you might not have been able to see.
Once you’ve cleared up the mess, you’ll want to cover your broken window with plastic and tape. It’s only a temporary measure so make sure you get in touch with a professional as soon as possible. Cut some heavy-duty plastic to fit the entire window. Using duct tape, secure the plastic over the window and make sure all the sides are sealed properly. It’s best to ensure that the plastic stays taught over the frame so it doesn’t get caught by the wind. Make sure you get in touch with a glazier or window installer as soon as you can – you'll notice a draught very quickly and someone could easily come and rip the plastic off. If you’re very worried about this you might want to add a chipboard over the top to make it more secure.

How much money will I save with double glazing?

By replacing the single glazed windows in your home you stand to make savings of around £170 each year. It’s not just the financial gain that makes double glazing attractive though and you can also save up to 680kg of carbon emissions annually. Over 20 years this is a saving of around £3,400 and 13,600kg of CO2.

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