Harrow Windows Ltd
  Welcome to Harrow Windows   Welcome to the Harrow Window and Construction Company Ltd, specialists in the supply and installation of windows, doors and conservatories. general building and extension work to the domestic and commercial markets.

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Frequently asked questions

Q: Are you FENSA registered?

We are fully CERTASS registered, which is the alternative certification body to FENSA, and works in very much the same way.

CERTASS, which stands for "certification and self assessment", was formed several years ago and was one of the original "Quality Mark" certification bodies. CERTASS is a "competant persons scheme" in respect of the installation of replacement windows, doors and associated glazing products in domestic properties.

Approval by CERTASS will allow member contractors to self-certify work, in exactly the same way that FENSA members do, and as such, CERTASS will be in a position to issue Building Regulation Completion Certificates to homeowners. For more information, visit the CERTASS website >>

Q: What about insurance backed guarantees or warranties? Do you provide those?

Yes we do, we have our comprehensive guarantee, and we offer an additional insurance backed warranty through Quality Assured National Warranties.

A condition of the new building regulations introduced in April 2002 is that the installing contractor (in this case us, Harrow Windows) must give, or at very least offer, insurance cover to the householder against any breach of the building regulations. Also, a professional contractor such as ourselves, should always provide an insurance cover that will honour the original guarantee, in the unlikely event of the company ceasing to trade for whatever reason. For more information, visit the QANW website >>

Q: What types of products do you offer?

UPVC, aluminium and hardwood replacement windows, doors and conservatories, all manufactured to the latest building regulations. We also offer the options of top quality established profiles, such as Rehau and Monarch.

Q: How long have you been established?

Harrow Windows was established by Colin Walklate in 2003. Colin has been involved in the double glazing industry now since 1987, when he started off manufacturing sealed units on the factory floor, and then progressed to being a working director of his own sealed unit manufacturing company.

Colin has been involved in various companies as both a working director and partner, but finally decided to establish Harrow Windows in response to a desire to move away from manufacturing and to become more customer orientated. Colin says, "I enjoyed the interaction with my customers and the sales aspect of the job so much more than I ever did on the manufacturing side."

Q: I haven't seen you advertised at all? Who are your customers?

Mainly the domestic installation market, and we're proud to say that most of our installations are from customer recommendations and repeat work, hence we have little need for advertising! We do often use boards on the jobs that we do, which obviously creates interest. We have also undertaken contract work for major companies such as Galliford Try (Linden Homes) and Marks and Spencer, and work closely with major property developers and interior companies. We also provide a lot of insurance work, working closely with a local security company.

Q: Do you offer a full conservatory design and planning service?

Yes, we design and plan all our conservatories from planning to painting, plastering, electrics, plumbing, and building, etc.

Q: How long will I have to wait for my new windows, doors or conservatory?

uPVC windows and doors are on average 4 weeks from survey. Aluminium windows and doors are usually manufactured in 4-6 weeks from survey. Timber takes a little longer, usually 6-8 weeks from survey. Conservatories depend on style, design, interior specification, and as such you can expect to wait around 5 weeks from survey to completion. Customised projects will be quoted an individual lead time which can be anything from around 6-10 weeks.

Q: What's the process for a conservatory installation?

After you've decided on the specification of your conservatory, building work, depending on design and size, should take no longer than 7-10 working days.

First we dig the foundations, then we fill these with concrete. Brickwork is erected with insulation, then a concrete floor is poured. Our surveyor then comes to measure and survey the conservatory for manufacture.

Around two weeks later, our fitters are back on site to install the framework and roof, and then make the conservatory watertight. Then any electrical or plumbing work can be undertaken - this is called the "first fix", and any windowboards are also fitted at this time. After the first fix, we usually plaster and screed the floor, after which sockets and heating are installed (radiators or underfloor) - this is called the "second fix".

The outside area is usually then re-instated - this means that the area where the works have been carried out is made good. The site is cleared, tidied and jet washed.

Q: What are your payment options?

Conservatories: usually spread over six payments. We don't ask for a deposit, but the first payment is usually due once the foundations are dug and filled. You can discuss this is more detail with Colin when he visits you.

Windows and doors: no deposit. 50% payment when all of the glass, windows and doors are on site, and then 50% payment upon completion of all works.

Q: Can I see some of your previous jobs?

Yes you can! In fact Colin likes customers to try to come and view at least two previous Harrow Windows' conservatory installations before you make your final decision. That way you can see and meet our satisfied customers and our products first hand.

Don't forget, you can also see pictures of some of our installations featured on our photo gallery.

Q: Who will visit me? I don't like salesmen!

Colin will visit you initially and oversee the whole project through from start to completion. We don't employ any salespeople, so please don't worry about high pressure sales. We simply don't work in that way.

For more information, please do not hesitate to contact us - we look forward to hearing from you soon!




All round home improvements from Harrow Windows

Harrow Windows are a registered CERTASS contractor. Visit the CERTASS website to discover more (opens in a new window) >> Comprehensive guarantees and insurance backed warranties for complete peace of mind.What do our customers think? Read our testimonials >>


Certass registered

We are members of Checkatrade.com! Click here for more info >>

  Welcome to Harrow Windows, specialists in the supply and installation of windows, doors and conservatories. general building and extension work, to the domestic and commercial markets.

The Harrow Window Company Ltd


Call Colin's mobile: 07976 807494  Email: office@harrowwindows.co.uk