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Endorsed by Which?
Southside Window Systems Limited
Opening Hours
Today -
- Monday 07:30–16:30
- Tuesday 07:30–16:30
- Wednesday 07:30–16:30
- Thursday 07:30–16:30
- Friday 07:30–13:00
- Saturday - Closed
- Sunday - Closed
Why you can trust this trader
After undergoing rigorous assessment to become endorsed, every Which? Trusted Trader agrees to our Code of Conduct. This gives consumers the reassurance that they have the best possible protection and adds an extra layer of security to ensure best practices and procedures are followed. Which? fully investigates any breaches and will take any necessary action to ensure consumer protection.
About
Southside Window Systems are a specialist Windows and Door company. supplying and installing Double Glazing , UPVC Windows and UPVC Doors in and around Glasgow.
Established in 1997, we are a family run business that supplies and installs Rehau Total 70S Double Glazing UPVC Windows in Glasgow and Doors in Glasgow to trade and public. All of our Double Glazing Units are manufactured directly from the Pilkington factory.
Southside Window Systems Ltd are associate members of rehau with a 10 year guarantee available.
Our team of highly skilled fitters all have a minimum of 10 years experience in the trade and all have to be trained to Rehau's high standards with customer care and quality being the top priority.
All our products are custom manufactured on an individual basis to match your own personal requirements.
With our fantastic choice of windows and doors in a range of styles and finishes (including sash windows in Glasgow),
What we do
Double glazing
- Double glazing installation
- Double glazing suppliers
- Double glazing repairs
Doors
- Patio doors
- Bi-fold doors
- Composite doors
- UPVC doors
- French doors
- Front door
Glaziers
- UPVC Windows
- Sash windows
- Double glazed units
- Double glazing installation
- Replacement window services and repairs
- Stained glass
More Services
- palladio door
My work
Customer reviews
Why you can trust these reviews
All reviews are verified as being genuine and a true customer of this trader.
How can we be so sure?
100% of the reviews we publish have been through our stringent moderation process.
4.9
316 reviews
Recommended
Recommended
by 99% of customers
Sort by
Repeat customers - very pleased with all aspects of Southside Windows
Customer Service
Quality
Value
We've used Southside Windows to replace external doors and fit bay windows. We've used them more than once because we're happy with the products, workmanship and their reliability for turning up when they say they will. I also like the efficiency of booking in with them via email with dedicated office staff to organise things.
Customer in East Renfrewshire
, work completed
Recommended
1st class company
Customer Service
Quality
Value
I have used Southside Windows before, and as always, they provide an excellent service. Repeat business is the best endorsement! They arrive exactly when they said they would, work quickly and quietly and tidy up perfectly. The guys are really polite and helpful. Also, the windows are beautiful and work well.
Customer in East Dunbartonshire Council
, work completed
Recommended
Replacement windows
Customer Service
Quality
Value
We needed replacement of fourteen windows to upgrade the builder’s original but rather poor quality wooden windows installation. I would have no hesitation in giving five stars to Southside Windows for every stage of the process through to completion of the installation and the windows themselves. The prospect of such a big job was worrisome but we needn’t have been concerned. Russell carried out the initial assessment, then measuring and estimating with calm efficiency and courtesy. From there, it was a few weeks waiting for the windows to be made and then booking installation. The team of joiners arrived as arranged and bang on time. It was then a case of ‘leaving it to the professionals’ and they did not disappoint. Of course, it is not possible to remove and install windows without dust and some mess but the men cleaned as they went, which meant that all we had to do was a light ‘Spring clean’ when the whole job was finished. If we had known about the proficiency and quality of Southside Windows, we’d have saved ourselves years of worrying whether we should or should not replace the windows and we’d have had this job done years ago.
Customer in East Renfrewshire
, work completed
Recommended
Great team and service from start to finish...relaxed no pressure and nothing a problem
Replaced 2 (3 window) bays and 3 large dormer windows along with a composite front door. Turned up on time every time through initial visit to the works. Work to agreed schedule and as quotation, Liked the relaxed Initial visit to measure up and price.. no sales talk or pressure..no problem accommodated final tweaks Communication up to installation always clear and quick and accommodated what worked best for us. Installation team also excellent.... good bunch of guys. On time, clean tidy job, polite and nothing an issue. Overall just what I look for no sales push and nothing made into an issue and a first class job at a good price.
Customer in East Renfrewshire
(Reviewer did not use service)
Recommended
Great work
Customer Service
Quality
Value
Just had Southside Window Systems fit 5 windows and a back door. David, Ian, and Craig arrived on time at 8.30 as promised, nice guys, friendly. They worked till the job finished with only a 15-minute break. I was expecting a 2-day job, but they finished at about 3.00. Covered everything with dust sheets and cleared up when finished. David noticed a bubble on the back door panel (I could not see it even after he pointed it out). They have ordered a new one, which will be fitted next week. I cannot fault anything from Russell doing the quote in half an hour (as promised, half an hour, not half the night) to Nicolle taking the payment, it was fuss-free, and the windows and door look amazing. Thanks, guys. I might have to get a new front door now, windows are making it look a bit old.
Customer in Glasgow City
, work completed
Recommended
Excellent Company
Customer Service
Quality
Value
From getting a quote through to finish, I could not fault Southside Windows. The workmanship of David, who fitted the window down to the installation end result, was excellent and we are delighted with the whole job. No issues whatsoever.
Customer in East Renfrewshire
, work completed
Recommended
Excellent Service
Customer Service
Quality
Value
We initially had Russell come out to quote for four new windows. He was punctual and very friendly. No hard-selling techniques. On the day, we had David, Craig and Ian install the windows. The three guys arrived on time, all took the time to introduce themselves and have a chat. Dust sheets were placed over the flooring and furniture. After completing the job, they tidied up, removed and rubbish and gave the floors a hoover. Overall excellent service, and would happily recommend them to anyone.
Customer in Glasgow City
, work completed
Recommended
Excellent Service
Customer Service
Quality
Value
Super happy with our new windows, excellent service from Southside windows. Russell advised we only needed new bedroom windows and the rest of the windows in the house were fine. No hard sell. Fitters arrived on time did a great job, worked well on an extremely hot day and tidied up afterwards. Would not hesitate to recommend Southside windows.
Customer in Renfrewshire
, work completed
Recommended
What a difference!
Customer Service
Quality
Value
Thinking of getting new windows and doors and contacted Southside Windows as I read all the reviews and also having been recommended by Which really appealed. Appointment made for today at 9.30. Russell arrived at 9.25am was out the door by 9.50 am. True to his word that he wouldn't be here for hours. Super impressed as, it turns out, we’re not needing new windows. Had another company out telling us we did and would cost £20,000 but if agreed on the same day, would be £16,000. We have decided to get a new front door and replace the glass on the hall window. Would have no hesitation in recommending Southside Windows if you’re thinking about it! So refreshing to have someone so honest and not trying to rip you off. Thankyou Russell.
Customer in East Renfrewshire
, work completed
Recommended
Excellent Service Punctual and Clean
Customer Service
Quality
Value
I had double-glazing fitted and was pleased with this company. Jackie in the office was very polite and courteous, and kept me up to date with everything concerning the fitters. They completed the job punctually and cleaned up after themselves. I would recommend this company
Customer in South Lanarkshire
, work completed
Recommended
Better late than never
Customer Service
Quality
Value
We had our windows fitted sometime ago so this review will reflect the orginial fitting experience, time past and recent customer service review. I was there the day the windows were fitted and asked the fitter why no foam insulation was used in large gaps between brick and windows and he said air gap would insulate enough, later winter experiences proved him wrong, severe heat loss during winter. When fitting the downstairs baywindow that fitter did not use a prop instead a bit of wood to support our bay roof, they had to refit that external aspect one week later as the roof was now lopsided and looked rediculous outside. This proved an issue later as we had to repair a leaking bay roof due to the shifting of the structure during this fitting. Time has passed and each winter the poorly insulated gap across all windows show severe heat loss and now the front baywindow has come away from the wooden sill. I contacted them asking for a health check and they said they did not provide that service to which I asked about insulation policy and they said yes it was their policy to insulate gaps with foam which they did not do during original fitting. Long story short the actual window frames fabricated are excellent our issue was always the fitting which was incredibly poor. We will now be videoing a review this winter for Youtube, carrying out a thermal test before and after foam insulation of these windows, testing Southside Windows air gap hypothesis.
Customer in Glasgow City
, work completed
Excellent quality
Customer Service
Quality
Value
Had new windows installed today, quality windows and superb workmanship by the 2 guys. Definitely recommend Southside Windows, had used them before in my previous home, so they were my first port of call when I needed windows again
Customer in Glasgow City
, work completed
Recommended
First class Job
Customer Service
Quality
Value
Excellent service from Southside Windows from Russell doing the quote with no hard sell and at a reasonable price 6 windows fitted by Ian and Craig who arrived early and did a brilliant job even cleaning up after themselves and finished job quicker than expected I would definitely recommend Southside Windows to anyone looking for windows
Customer in Glasgow City
, work completed
Recommended
Great work and lovely business
Customer Service
Quality
Value
The quality of the windows is great - they are really into keeping with the traditional frames, and the job was quick. They are a lovely company to work with and put my mind at ease over what would otherwise have been a stressful purchase.
Customer in Glasgow City
, work completed
Recommended
First class
Customer Service
Quality
Value
From first visit I could tell I was dealing with a first class company, no hard sell, got quote quickly, was kept up to date with proceedings from them. The fitters arrived on said day and time, and their workmanship was excellent, did a good job cleaning up after them. Would not hesitate to use Southside windows windows again.
Customer in Glasgow City
, work completed
Recommended
Two Windows Replaced
Customer Service
Quality
Value
This is an amendment to previous review. Customer Service 5 Stars. If I could give more I would! Apologies, I am unable to amend my error on previous review. Excellent service from a professional local business. From the initial contact right through to the work being completed, we have been extremely impressed. Thank you for accommodating us for a small job of replacing two windows. The flexibility was much appreciated. David and his team completed this in a morning and even cleaned up afterwards. We are delighted with our new windows. We would thoroughly recommend this company. Customer in East Renfrewshire Posted on 17/03/2025 , work completed 06/03/2025
Customer in East Renfrewshire
, work completed
Recommended
Two windows replaced
Customer Service
Quality
Value
Excellent service from a professional local business. From the initial contact right through to the work being completed, we have been extremely impressed. Thank you for accommodating us for a small job of replacing two windows. The flexibility was much appreciated. David and his team completed this in a morning and even cleaned up afterwards. We are delighted with our new windows. We would thoroughly recommend this company.
Customer in East Renfrewshire
, work completed
Recommended
Highly recommended
Customer Service
Quality
Value
Brilliant service and definitely would recommend. The team was professional and friendly. Did an excellent job. We love our new windows. Thank you
Customer in Glasgow City
, work completed
Recommended
Highly recommend
Customer Service
Quality
Value
A great professional job was done by the fitters cleaned up and owner Russell very good no hard sales talk just very honest. Would recommend them to anyone thinking about new doors or windows first class
Customer in East Renfrewshire
, work completed
Recommended
Honest and truthful
Customer Service
Quality
Value
We contacted Southside Window seeking advice and a quotation for replacing windows in our semi-detached bungalow. Rusell arrived at the agreed time and after examining the existing windows told us that, while he would be happy to prepare a quote to replace our windows in his opinion the existing windows were in perfectly satisfactory condition and unless we wanted to completely change the style of window we should not spend large sums replacing "perfectly good windows". This honesty was greatly appreciated, so honest and truthful and a company you can trust.
Customer in South Lanarkshire
, work completed
Recommended
Great service
Customer Service
Quality
Value
We had windows done in 2 rooms. Russell came out twice to ensure accurate measurement and quoting. The price quoted was exactly what we paid. The men who fitted the windows were exceptionally neat, and cleaned up after themselves to a higher than expected standard. They turned up on time early, and worked all, day for 2 days. On completion I noticed some scratches on one of the panes - this was immediately reported back to base by the fitter and a replacement pane fitted shortly after. The windows look superb. Great service all round.
Customer in East Renfrewshire
, work completed
Recommended
Window Replacement
Customer Service
Quality
Value
We needed our Windows replaced and went to 4 contractors. Russell was very helpful in discussing our requirements in replacing the windows and not pushy like some others. I received the quotation the following morning with a full breakdown of the works discussed the previous night. Their cost was competitive , so we decided to secure the window replacement works with Southside Windows. Communication via email was first class. We were told that the installation would be in around 6-8 weeks once order was place. Works started 6 weeks after order was placed. The Installation period took 2/3 days. This incorporated the installation of 2 very large bay windows, 2 medium sized bay windows plus 2 kitchen & 1 bathroom window. Works were professionally done and the house was cleaned afterwards of any debris. I was very impressed with the works and you would never have known they had changed the windows. There was no requirement for any decoration works. We have noticed a huge difference in the warmth staying in the house, less noise pollution and no condensation inside of the windows. I would definitely recommend Southside Windows to my Friends & Family.
Customer in East Renfrewshire
, work completed
Recommended
Came highly recommended, didn’t disappoint
Customer Service
Quality
Value
Came highly recommended. I was pleased with the no-nonsense approach by Russell, the owner, who gave me the quote without the hard sell. The workmen were professional throughout the installation, also considerate and friendly. Work was completed on time with very little disruption to myself. The workmen cleaned up inside and out. I’m pleased with the end result, the windows look great. Also really helpful were the staff in the office, Jackie kept me fully updated at all times. Would happily recommend to others.
Customer in Glasgow City
, work completed
Recommended
New windows
Delighted with our new windows and door to our character home, very efficient and professional service throughout from sales, survey to fitting. Excellent value for a quality product, and job completed ahead of schedule, would highly recommend!
Customer in
(Reviewer did not use service)
Recommended
Reliable & Professional
Customer Service
Quality
Value
Return customer for a reason. Great company with first-class help and advice from initial enquiries via showroom staff to the ultimate installation by their work teams. Extremely competitive prices for replacement windows and always a first-class service. Provided a fast timescale from estimate to installation and the workmanship is second to none. Great customer service for any follow-up enquiries. Thoroughly recommend this company for windows and doors.
Customer in Glasgow City
, work completed
Recommended