Find a Window Installer you can trust in Mountain Ash.

Choose from 76 Window Installers, all rated by people like you.

Over 43 reviews & an average rating of 4.8/5 stars, you'll find the right pro

Choose and shortlist

Use the shortlist button to select up to 4 tradespeople, enter your project details and press send

or

Keen to get on with the job?

Get up to 4 quotes from local Window Installers near you

View Shortlist
Verified ProOver 20 Reviews

A Rated Home Improvements

26 review(s)
Offers services in MOUNTAIN ASH
Founded in 2010 in Port Talbot, but now based in Gorseinon, A-Rated Home Improvements install double glazing, uPVC and Alu...
Verified Pro
Over 35 years’ experience, we offer the complete package from design to installation & 10 years beyond. We offer start to ...
Verified Pro

Redwood Landscapes

3 review(s)
Offers services in MOUNTAIN ASH
Redwood building and landscapes are a professional building and landscaping company, providing first class services to cli...
Verified Pro

Eliot Welsh Building Services

0 review(s)
Offers services in MOUNTAIN ASH
I have over 24 years of experience in the trade . I am fully insured and although I have never had to use it , it is there...

Recent Window Installer Enquiries

14 Jan

Windows | uPVC

Mountain Ash - CF45

Enquiry from: Kim H

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 do...

Post a similar request >

14 Jan

Windows | uPVC

Mountain Ash - CF45

Enquiry from: Andrew W

Start Date: Immediate

what best describes your living situation? - homeowner - joint. how many windows are you considering replacing? - 6. what material do you require, upvc? - upvc. what colour do you want them to be? - w...

Post a similar request >

10 Jan

Windows | uPVC

Mountain Ash - CF45

Enquiry from: Jamie L

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 do...

Post a similar request >

02 Jan

Windows | uPVC | Single Window

Mountain Ash - CF45

Enquiry from: Jamie- L

Start Date: Immediate

Are you the home owner of that property? - /. How many windows are you considering replacing? - /. What material do you require, UPVC? - /. What colour do you want them to be? - /. I assume you requir...

Post a similar request >

15 Nov

Windows | uPVC

Mountain Ash - CF45

Enquiry from: Huw S

Start Date: Immediate

Are you the home owner of that property? Yes How many windows are you considering replacing? 3-5 What material do you require, UPVC? UPVC What colour do you want them to be? White Do you require doors...

Post a similar request >

17 Oct

Windows | uPVC

Mountain Ash - CF45

Enquiry from: Jayne S

Start Date: Immediate

Are you the home owner of that property? yes How many windows are you considering replacing? 11 What material do you require, UPVC? upvc What colour do you want them to be? WHITE Do you require doors...

Post a similar request >

13 Sep

Windows | uPVC

Mountain Ash - CF45

Enquiry from: Megan J

Start Date: Immediate

Are you the home owner of that property? Yes How many windows are you considering replacing? 2 What material do you require, UPVC? yes What colour do you want them to be? white Do you require doors If...

Post a similar request >

20 Mar

Windows | uPVC

Mountain Ash - CF45

Enquiry from: Alan E

Start Date: Immediate

Are you the home owner of that property? - How many windows are you considering replacing? - What material do you require, UPVC? - What colour do you want them to be? - Do you require doors If so how ...

Post a similar request >

16 Jan

Windows | uPVC

Mountain Ash - CF45

Enquiry from: Tina M

Start Date: Immediate

Are you the home owner of that property? - How many windows are you considering replacing? - What material do you require, UPVC? -- What colour do you want them to be? - Do you require doors If so how...

Post a similar request >

20 Jun

Windows | uPVC

Mountain Ash - CF45

Enquiry from: Ashley C

Start Date: Immediate

I’m looking to purchase the property, just had the surveyors report and I need all 8 windows and the front and back door replacing.

Post a similar request >

08 Mar

Windows | Glazing

Mountain Ash - CF45

Enquiry from: Karene S

Start Date: Immediate

upstairs windows have condensation between the glass panes. are you the property owner: owner of the property property type: terrace how many units do you do you require: 2-5 windows what level of ser...

Post a similar request >

08 Mar

Windows | uPVC

Mountain Ash - CF45

Enquiry from: Karene S

Start Date: Immediate

customer in mountain ash areas is looking to do a couple of projects at the moment, and would like quotes for upvc double glazing.confirmed interest via sms and email at 08/03/2023 14:43.please call t...

Post a similar request >

27 Feb

Windows | uPVC

Mountain Ash - CF45

Enquiry from: Ian M

Start Date: Immediate

Wooden window repair Lead Wooden window repair Lead

New front window 152x176 2x new doors (rear and rear garage), 2x replacement glazed units and if you do them also a garage door

Post a similar request >

03 Jan

Windows | uPVC

Mountain Ash - CF45

Enquiry from: Paul C

Start Date: Immediate

*homeowner 2+ windows upvc supplied and fitted please call to appoint

Post a similar request >

28 Dec

Windows | uPVC

Mountain Ash - CF45

Enquiry from: Paul C

Start Date: Immediate

customer is looking to have new windows installed. they are unsure of options so would like to discuss. confirmed interest via customer lives in mountain ash area 2+ windows supply and install please...

Post a similar request >

28 Feb

Windows | uPVC

Mountain Ash - CF45

Enquiry from: Kirsty E

Start Date: Less than one month

Best Time: Any Work Type: uPVC Windows and Doors

Post a similar request >

01 Oct

Windows | uPVC | Single Window

Mountain Ash - CF45

Enquiry from: Jayne M

Start Date: Immediate

customer is looking to replace their windows. they are still considering options so please call to discuss what would be best for their home. homeowner lives in mountain ash area 2+ windows supply an...

Post a similar request >

13 Apr

Windows | uPVC | Single Window

Mountain Ash - CF45

Enquiry from: Ruth M

Start Date: Immediate

Customer looking to have the new window for their shed. Call any time. Number of windows: 1 Style of window: Standard window Quote requested on windows, in PVCu, to be supplied and fitted.

Post a similar request >

14 Sep

Windows | uPVC

Mountain Ash - CF45

Enquiry from: Nigel J

Start Date: Immediate

i am looking to get quotes to have 2 windows windows replaced are you the property owner: owner have you considered getting your windows replaced to match a new conservatory: yes how many windows are ...

Post a similar request >

23 Aug

Windows | uPVC

Mountain Ash - CF45

Enquiry from: Par C

Start Date: Immediate

customer living in mountain ash area made an enquiry for double glazing quotes via one of our websites. customer confirmed interest via miss needs advice on options 2+ windows supply and install plea...

Post a similar request >

How much do Window Installer services cost?

How much do Window Installers cost? Prices for Window Installers in 2025 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 Mountain Ash is:

£2,082

Window Installer job Window Installer cost in 2025
Double glazing in Mountain Ash £1,500-£5,000
Upvc double glazing units only in Mountain Ash £800-£1,200
Triple glazing in Mountain Ash £1,500-£5,000
Aluminium windows in Mountain Ash £1,875-£2,875
Wooden window in Mountain Ash £3,750-£5,750
Aluminium windows supply only in Mountain Ash £2,600-£3,900
Upvc or wood porch in Mountain Ash £2,625-£4,025
Sash window in Mountain Ash £1,800-£6,000
Glaziers in Mountain Ash £57-£87
Secondary glazing in Mountain Ash £1,500-£5,000
uPVC Single Window in Mountain Ash £225-£345
Wooden sash windows in Mountain Ash £3,750-£5,750
Wooden windows supply only in Mountain Ash £2,760-£4,140
Aluminium repair in Mountain Ash £240-£360
Window repair in Mountain Ash £268-£402
Wooden window repair in Mountain Ash £320-£480

Related Window Installer searches in Mountain Ash

Window Installer FAQs

Can I fix glass on one side of a double glazed window?

Unfortunately, you can’t fix the glass on one side of a double glazed window. That’s because they’re sealed units – once one pane of glass is broken, that will break the seal and its thermal insulation properties will be lost.

The good news is that if your window frame is still looking great, there’s no need to replace that. You can simply replace the glass in the window, which will cost much less. You can look to spend around £250 on a sealed unit, whereas a whole replacement single window may cost up to £600.

When an installer comes to replace the glass in your double glazed window, they will survey the inside and outside of your home around the window, then move any furniture by the window so they’ve got access. They should then pop a dust sheet down to stop any debris from getting on your floor.

Then, the installer will carefully remove the beads from the frame. They will then lift the glass out of the frame and put it somewhere safe before cleaning out all of the dust and any debris that has found its way into the frame. Using spacers at the bottom of the frame, the installer will make sure that the sealed unit is square in the frame to get a good fit. Once they’re happy, they will replace the beading and make sure it looks perfect before cleaning up their tools.

You could have a go at replacing the glass on a double glazed window yourself, but it’s not recommended. Leave it to the professionals who will know exactly what to do and will be able to do it quickly and safely.

Are A-rated windows worthwhile?

On the grand scale of things there isn’t a huge difference between B-rated windows and A-rated windows. Consumer watchdog Which? have calculated an extra 6.5% would be saved on energy bills with A rather than B rated panes. Be aware that A rated windows are slightly more expensive, however.

How long does it take to install one small double glazed window?

To install one small double glazed window, it will take anywhere between two hours and half a day. It will depend on whether one installer is fitting your window or two. And if you’re doing it yourself and don’t have any professional experience, it will take even longer.

When the window fitters arrive, they will make sure they’ve got safe access to the window and move any heavy furniture if they need to. Any good installer will lay down a dust sheet, but it’s a good idea to check that they’ve got one laid down before they start.

The first step any window installer will take is to double check the measurements of the new frame against your existing one. Hopefully it should match up, so then they’ll take the old window out. Then, they’ll insert the new frame into the aperture and bolt it into the concrete. They'll check it with a spirit level to ensure it’s even before moving onto the glass sealed unit.

The installer will place the glass into the aperture, then fit the beads to secure the glass in the frame. They’ll then use silicone and trim on the inside and outside to ensure the window looks perfect. You won’t be able to see where they’ve used sealants or trims because they’ll colour match them so it’s not noticeable. Then, they’ll tidy up all of their tools and the working area and let you know what needs to be done in terms of proving that the window meets building regulations. Most good installers are registered with a self-certification scheme, so will be able to issue a certification once the work is complete.

How much could I save on my energy bills if I install double glazing?

As well as keeping your home warmer and reducing noise, you’ll notice a saving on your energy bills from installing double glazing. If you install A++ rated windows in your home after having single glazing, you could save up to £120 year on your energy bills. The Energy Saving Trust has more information.

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.

how much are new windows?

Are you about to replace your old windows and wondering just how much it’ll cost to have a new one fitted? If yes, then you’ve come to the right place! The question is a very straight forward one, however a direct answer can not be provided as determining window prices for a replacement project can be a very tricky challenge. With a plethora of influencing factors that can play a key role in the price of both materials and labour to be used, it could be extremely hard for a window installer to provide a cost estimate without paying you a visit beforehand.

The factors that can go a long way in determining the price of your new window includes the size of the window, frame material, style chosen, your location, rates charged by the window installer (these rates can be different from an installer to an installer, so it’ll probably be in your best interest to compare quotes to identify the most competitive price) as well as the type of glass required.

Generally, for a small flat featuring four windows, the average cost for new windows would be between the range of £2,100 to £2,300. This range provided covers the cost of double glazed uPVC casement windows as well as the installation price. In the same tone, a home with up to 8 windows will have an average cost for window replacement between the range of £4,400 to £4,600, wile also taking into account the installation price. Whereas a house comprising 10 windows could begin at an average cost of window replacement between the the range of £5,200 to £5,500, and a 15 window home will be between the range of £8,400 to £8,600. it should be noted that the aforementioned figures only include the standard number of windows with a uPVC frame and the installation cost.

How to replace the glass in a uPVC window?
It’s not too difficult to replace the glass in a uPVC window, so if you’re a confident DIYer you could have a go at this yourself. We’ll go through the main steps on how to replace the sealed unit in a uPVC double glazed window:
  1. Using a rubber mallet and a strong pallet knife, remove the beading around the window. You might think they’re part of the frame, but they’re actually separate on the inside of the frame and can be taken out by using pallet knife to prize them out. Start with one of the longest beads first and leave the top bead until last.
  2. Give the glass a little tap to loosen it if it doesn’t come out straight away, then the whole unit should slide out easily. Just make sure it falls towards you and not back out onto the ground below!
  3. Clear any debris that has found its way into the frame with a brush. Add spacers at the bottom of the frame – these could be pieces of plastic.
  4. Get your new sealed unit (make sure you measure the glass before you buy one so you know which size to get) and carefully take it out of the packaging. Look for the British Standard mark – that shows you the bottom of the glass.
  5. Lift the glass into the frame, starting with the bottom first, and make sure that it fits square in the frame before taking the spacers out.
  6. Use a little washing up liquid to spread along the beads to make it easier when you slide them back into the frame. If they simply push and clip back in, you can use something like a block of wood to help you push them in correctly. Put them back in reverse order to how you took them out.
And there you go! If you’re feeling confident you can have a go at replacing the glass in your uPVC window yourself. But if you’ve got any worries, leave it to a window installer who will be able to do it in less than an hour.
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.

Window Installer help and advice

How it works

Tell us about your Window Installer project

Answer a few quick questions to help us match you with the right Window Installer

Get up to 4 free quotes

Receive no-obligation quotes from 4 Window Installers working in Mountain Ash.

Pick the right pro for you

Compare prices, customer reviews and services, and hire the right Window Installer.

Are you a Window Installer in Mountain Ash?

View our open Window Installer jobs near you

Join today
View Shortlist