FAQ’s

Secondary glazing is a second custom-made window, attached to the inside of your existing window, creating a double glazed effect, with out damaging or changing your existing windows. Clearview secondary glazing is designed to be discreet and compliment your existing window, décor style and property type. See our Quick Guide

 

The units are manufactured from a combination of a slim seasoned timber perimeter sub-frame and extruded powder coated aluminium profiles, these contain the glass sections, to which numerous options are available. The standard glass is 4mm toughened other glass options are available on request.. All materials are from managed, sustainable abundant sources. See Our Product Guides

 

The Standard Frame option is default set on initial product selection, applying the slimmest timber sub-frame to suit the aluminium frame profile:

Examples:

  • Lift-Out & Standard Hinge Units – 25 x 16mm
  • Horizontal & Standard Vertical Sliders – 43 x 16mm
  • Tilt-in Vertical Sliders & HD Hinge Units – 62 x 16mm

 

The XL timber sub-frame (Extra Long) can be applied as a preference or as required, extending the sub-frame to assist with:

  1. Enables a pre-drilled reveal fix hole to be applied through the timber, behind the aluminium track rather than self-drilled through the track on site by the customer/ fitter, giving a simpler, cleaner finish.
  2. It extends the frame slightly away from the primary frame to help accommodate protruding items, such as, handles, catches, staff beads etc.
  3. Enables different systems to be coupled together, stack or form Bay Window structures, giving a consistent frame depth.
  4. It will slightly increase the glass to glass air-gap when face fixing.

The XL frame is available on the following units:

  • Horizontal & Standard Vertical Sliders – 62 x 16mm
  • Tilt-in Vertical Sliders, HD Hinged & Double Hinged Units 70 x 16mm

 

The Ultra profile: This refers to the glazing panel supplied with the units

  • If a Standard Frame or XL is selected and the glass selected is to a maximum 6.8mm glass, the standard glazing panel is applied.
  • If an 8.8mm or 10.8mm glass is selected the glazing panel will default set to the Ultra Profile, this is a slightly larger section by approx. 2mm.
  • Why is this relevant? if a the same section was applied to cover all sizes, the thinner glass options would not sit snugly in the section.

 

Please see our Product Guides for specific system information.

Please see our Quick Guide for the overall principles of the application.

Please see our Min/Max size guides

The XL timber sub-frame (Extra Long) can be applied as a preference or as required, extending the sub-frame to assist with:

  1. Enables a pre-drilled reveal fix hole to be applied through the timber, behind the aluminium track rather than self-drilled through the track on site by the customer/ fitter, giving a simpler, cleaner finish.
  2. It extends the frame slightly away from the primary frame to help accommodate protruding items, such as, handles, catches, staff beads etc.
  3. Enables different systems to be coupled together, stack or form Bay Window structures, giving a consistent frame depth.
  4. It will slightly increase the glass to glass air-gap when face fixing.

The XL frame is available on the following units:

  • Horizontal & Standard Vertical Sliders – 62 x 16mm
  • Tilt-in Vertical Sliders, HD Hinged & Double Hinged Units 70 x 16mm

 

Please see our Product Guides for specific system information.

Please see our Quick Guide for the overall principles of the application.

Please see our Min/Max size guides

The Ultra profile: This refers to the glazing panel supplied with the units

  • If a Standard Frame or XL is selected and the glass selected is to a maximum 6.8mm glass, the standard glazing panel is applied.
  • If an 8.8mm or 10.8mm glass is selected the glazing panel will default set to the Ultra Profile, this is a slightly larger section by approx. 2mm.
  • Why is this relevant? if the same size profile was applied to cover all sizes, the thinner glass options would not sit snugly in the section.

 

Please see our Product Guides for specific system information.

Please see our Quick Guide for the overall principles of the application.

Please see our Min/Max size guides

Yes, we can provide most glass types, based on the specific needs of your project.

The standard glass is 4mm toughened, This safety glass is a minimum requirement where building regulations demand health and safety considerations, including the distance from floor and doors.

(We do not offer float/annealed glass) Subject to panel size this may default to 6mm toughened.

Laminated, Acoustic, Thermal Low-E, and Obscure glass options can be accommodated.

  • The Vision range can accommodate up to a 6.8mm glass
  • The Vision Ultra range can accommodate up to a 8.8mm glass.
  • The Vision HD Hinged System can accommodate up to a 28mm Sealed double glazed unit.

See our Full Glass Ranges options 

 

It is difficult to give exact details, as every property and everybody can be affected differently by noise pollution, however the science confirms, Clearview Secondary Glazing can reduce noise by as much as 80% or by over 50 decibels, (a reduction of 3dB is equivalent to halving the noise energy) this is 5 times greater than either double or triple glazing. This is subject to final specification and installation limitations, these details can be clarified during a consultation with one of our advisors. But the number one target is to try and put as much space between the existing glass and new secondary glass, The bigger the air-gap the better the performance. if the space allows try and get 100mm + to an optimum 150mm to 200mm. where space is limited a thicker glass will help. We always recommend starting with a 6mm glass for soundproofing.

Watch Our Performance Video

 

Predicting the levels of soundproofing you will achieve is extremely difficult due to the many variables concerning you and your property, however following these basic principles will ensure you maximise the potential for the best results.

In order of importance: –

  1. The Airgap
    • This is the gap glass to glass
    • The wider the gap the better
    • Use whatever space is available to an optimum of 200mm+
  2. The Glass
    • The thicker the glass the better the overall performance
    • The combination of glass and airgap will optimise performance.
  3. Refining your choice
    • With a limited airgap consider an acoustic glass option to optimise performance
    • Where larger airgaps are possible acoustic glass will outperform a lower cost option however increases in performance are incrementally smaller.
  4. Choice of System
    • Choose the system best suited to your primary window design and your needs for access.

More information can be found on our Acoustic Page

We have test certification which confirms that Clearview Secondary Glazing can enhance the thermal insulation of a single glazed window by as much as 65% or a U-Value of 1.868 W/m2K (a U-Value is the formula for measuring heat loss the bigger the number the more inefficient the window is, a standard single glazed window has a recognised U-Value of approx. 5.8 W/m2K. This performance is better than a Class C, with some products  this performance can be as much as A+. English Heritage and Historic Scotland carried out research through Glasgow University which showed secondary glazing out performed  double glazed replacement windows. This is subject to final specification and installation limitations these, details can be clarified during a consultation with one of our advisers. see our Thermal Insulation pages

Clearview Secondary Glazing has a proven track record to eliminate or significantly reduce condensation problems to a point where it is no longer a concern. The naturally occurring problem of condensation varies from window to window and property to property and whilst we can’t guarantee a total cure, the fitting of the Secondary Glazing creates a manageable chamber, reducing most of the problem and, where moisture absorption products can be placed, which are then 10 time more effective. see more details on our Condensation pages

Pictures show it best, please visit the Gallery

Virtually all Clearview Secondary Glazing is easy access, and we always recommend considering how to best mange your windows should you install secondary glazing. The idea of taking units out in the summer and replacing in the winter rarely effective and generally causes frustration. Our systems are designed to be in-situ all year round and can simply hinged or slide open for quick and easy access for ventilation or cleaning at any time. Lift-Out semi fixed systems are available and offer a cost-effective solution for seldom accessed windows.

Horizontal Sliders, panels sliding left and right (all panels will slide), the panels can also be lifted out of the frame. Panels can be equally split across the width of the frame or offset to match the existing glass sections if required. With a 2 pane slider, both panels will slide. LH = Left Hand, RH = Right Hand, i.e. If the side you are likely to open most often (from inside looking out). is the Left side. the LH version should be selected, this means the Left Hand panel will slide in front of the Right Hand Panel, the Right sliding behind the left.

With a 3 panel standard slider (SS3) this enables the left and right sides to individually slide  in front of the centre panel, there will always be a pane of glass covering the centre, panels can be lifted out. If access to the centre panel of the primary window is required, a CO3 unit should be selected (Centre Opener). LH or RH versions an LH version means the panel will slide from the Left over the right.

Vertical Sliders, Panels sliding up and down, both panels slide, the standard configuration is the bottom panel will slide up in front of the top panel, this can be switch on request. Panels can be equally split of offset to match the primary window if required. Panels cannot be removed, but on some systems can be tilted out of the frame for easy cleaning. The panels are supported by hidden springs so will be held at a desired open position. The panels will not fully slide to the centre point.

Operational Video Examples can be viewed in our Video Library

Secondary windows, or glazing, offer all the benefits to double glazing- improved heat retention, lower heating costs, lower greenhouse emissions, improved noise reduction and improved property security, as well as significantly reducing draughts and condensation. It is a lower cost option to full window replacement, and there if no disposal to landfill, it’s quick and easy to install and generally does not require any post-installation decoration. Most importantly, secondary glazing gives an improved living environment. In addition may existing windows have lasted 100 years or more, with little maintenance can last, for many more, protecting the character, charm  and heritage of a property for future generations to appreciate. They will outlast many replacement options without any disposal to landfill and with the enhanced performance they offer a very environmentally responsible solution.

Yes. In most cases, secondary glazing meets the requirements of Buildings and Conservation regulations associated with both Grade II & I listed buildings, as it is a completely reversible installation that does not effect the fabric of the building. However, subject to your property listing status, we recommend liaising with your local conservation officer who will be able to give you further advice.

See examples of our Listed Building project portfolio 

 

Our normal lead-times are confirmed below, however there are currently supply chain difficulties across the UK at present October 2021, this is pushing some order to 6-weeks. The product delivery is assured, just specific timings are unpredictable. We are seeing signs of improvement and hope to be returning to the standard arrangements soon.

Clearview Supply Only standard systems are normally dispatched within 6-8-weeks from customer approval this would be for rectangular style units but includes splayed reveals and bays if required. More complex requirements, e.g. arched windows. would take a little longer, details would be confirmed at the time of order.

PLEASE NOTE: Due to current market conditions and forces please [click here for the latest delivery expectations]

See our Delivery Details and Covid-19 update

Installation: (if you are using our installation service), This is subject to location, and the specification of your order, but we endeavor to complete within 4-6 weeks from formal survey.

How much does the delivery cost? Delivery is free to most parts of England and is confirmed on submission of the delivery point postcode. However, we need to charge for delivery to the following areas: Check your Postcode here

  • Scotland: Most of Scotland is Price on Application to the following locations postcodes starting:   PA / PH / AB / DD / IV / KW / £P.O.A. A Charge of £75.00 + VAT per drop to KY / FK & parts of East DG. A £100.00 + VAT charge to KA & Central DG. A £150.00 + VAT charge to West DG.
  • North West: A £75.00 + VAT to all CA.
  • Wales: A Charge of £75.00 + VAT is applicable to East LL & SY. A £100.00 + VAT to Central LL & SY.  A £150.00 + VAT to West LL /SY & All SA. 
  • Cornwall: TR / PL / TQ A Charge of £75.00 + VAT.
  • South East: CT A Charge of £75.00 + VAT
  • This is a single charge per drop (not per unit), and confirmed on quotation or verification.

The delivery is a dedicated service (not a mainstream courier) , shipping only the secondary systems, using a small fleet of Mercedes  Sprinter vans (or equivalent). Delivery dates will be notified shortly after approval, Times and dates cannot be selected or specified.  

Can you deliver overseas? No, we can deliver to any mainland UK port or address, for the customer to arrange their own onward shipping arrangements. In line with the standard delivery statement above.

Can the driver assist with unloading? Standard delivery is to kerbside onlyDrivers are only insured to unload to the threshold of the property, we advise that customers make arrangements to assist and to handle the units thereafter.

Please visit the following page for additional ordering and delivery information: Order & Delivery Services

  • Unfortunately, we are unable to offer export arrangements, support or assistance, units can be delivered in standard packaging format to any UK Mainland port or distribution centre based on standard order processing. The customer must make all freight Management and forwarding arrangements with their chosen provider. VAT is applied in full and in accordance with HMRC regulations, it is the customers responsibility to make any VAT reclaim or recovery should it be applicable.

Most of our business is to the DIY market, Units are supplied fully assembled, predrilled and glazed, easy installation ready.

If you follow the simple step by step Measuring Guide, the units will easily lift into position, with a few adjustments to get level, all of which is fully explained in the Installation Guide, the units can be fixed in place and the supplied finishing trim applied to cover, seal and hide any gaps and inaccuracies between the wall and frame.

If DIY is not for you, why not call on friends, family or neighbours to assist, anyone who can wield a screw driver can tackle this process.

If you haven’t got a contact you can rely on we can suggest using the Which Trusted Trader search service, just enter your postcode and search for Carpenter /Joiners, you should get a list of qualified and verified tradesmen in your area and whilst we can’t offer Personal recommendations, they will be more than capable of carrying out the work.

It varies. It’s dictated by the size and complexity of the order. Based on a  window approximately sized 1000mm x 1200mm, installation should take under an hour. On an average order size of 8 windows, installation can be complete within a day, it is relatively simple for anyone with basic DIY skills . Clearview secondary glazing is pre-assembled, pre-glazed and pre-drilled for ease of installation. 

see our Installation Guide

 

No, we can only offer this service with our installation option. Following our measuring guidance is easier than you may think.

We do have specialist installation team and can provide a fully comprehensive Survey, Supply and Installation service, this is a highly qualified City & Guilds trained team covering all certification requirements for both domestic and commercial projects.

However, this service is limited by size and location of project, and generally limited to an approximate 50-mile radius of our Sheffield Head Office for most domestic sized property. Details are discussed and evaluated via a telephone consultation service. We try to offer a financially attractive installation service, but, the greater the distance and smaller quantity of windows required, the less competitive our offer becomes and it may be more advantageous to consider our Supply Only service.

[Click here] to see if we can fit in your area

Commercial work is evaluated on a project by project basis

Site visits are only arranged following a consultation with one of our advisers, we will request you send us some images and rough sizes of your windows and will will prepare some proposals and price guides to establish is this is of interest to you.  Contact Us 

Where we are unable to offer an installation option, why not consider our Supply Only service for a DIY approach or using a local tradesman, this is easier than you may think and very cost effective.  see our Help Centre for more details.

Unfortunately we cannot recommend fitters, it is not possible to keep an up to date national database of installers where we know they are accepting work of this nature or their quality of customer service is appropriate. we prefer the customer to vet and verify their own installer.

The DIY approach can be easier than you may think, if you are not DIY confident, you may have friends, family or neighbours who are and could be called on for help.

If you are still struggling to find assistance, we can suggest using the Which Trusted Trader service, just enter your postcode and search for carpenter / joiners, this should give you a list of tradesman in your area who would be more than capable of carrying out the work. 

Primary windows are rarely square and parallel sided, so you need to ensure the widest part of the secondary unit (including the sub-frame) will fit into the narrowest part of the area it is being fitted. Any gaps around the frame are then covered and sealed with the edging trim supplied with the units. It is particularly important that the units are not too tight, and most problems occur because of this,  whilst some adjustments can be made to the Sub-Frame, if the unit is too tight it won;t fit and cant be used, if squeezed in it can distort and cause operational and performance problems. a small gap around the units ensures maneuverability and position to ensure the perfect fit.

See our measuring guide

The recommended 10mm tolerance deduction is for guidance only as the aperture/reveal distortion will dictate unit size/fit adjustments  and requirements.

No, we are unable to determine what fixings and packing requirements may be needed due to the vast range of differing window styles and materials. All  fixing material requirements screws, packers etc are detailed in the installation guide.

We do offer optional fixing kits, these can be added to your quotation at the point of creation or you can visit our online store

Trim: With white units the standard trim supplied free of charge, it is white 27mm wide uPVC, this is easy to work with, matches the colour of the unit and is maintenance free. 

With colour units a 27mm wide timber painted trim is supplied as standard to match the units.  this may  require painting and upkeep at some future point.

The trim supplied is in sufficient lengths to cover the front face only, sealing off gaps between the reveal wall and the frame. Additional trim for back trimming or side covering is available as an optional extra.

The customer must satisfy themselves that the standard trim supplied is sufficient for their needs.

Alternative sizes are available as an optional extra and can be added to the quote / order as required..

Please note, the trim is an industry standard product, if you find that an alternative trim is required after delivery, this can be purchased from local DIY merchants or a variety of online retailers. we are unable to supply trim as a standalone item.

All units are supplied with a perimeter sealing / finishing trim. To complete the installation the trim is applied to the front face of the unit, fixing to the sub-frame, sealing and hiding any gaps or distortions between the wall and the frame. this gives a neat finish from the inside looking out.

BACK-TRIMMING: Only required if a unit is reveal fixed away from the primary window. This is a chargeable optional extra where a duplicate amount of trim can be added to the order, to finish and seal the back of the frame, (a) neatening the finish from a view when look outside in, if the back of the frames are visible. (b) it may offer a little more acoustic sealing performance.

We always recommend that the sub-frame is included, this is pre-attached to the system at the point of manufacture. This has several benefits and is hidden by the edging trim on completion. It enables gaps around the frame in out of square apertures to be easily covered and give a better blended and unobtrusive finish. It enables minor adjustment to be made on installation and to notch out around lumps, bumps or cables etc. it also enhances insulation performance with expansion and contraction during seasonal changes.

The sub-frame is a value engineered product, designed to be hidden from view on completion, it is designed to protect the unit in transit and can arrive marked, with nicks scratches and knots, joints in the sub-frame will move in transit. All these aspects are perfectly normal and will not deteriorate the performance or final appearance of the unit when fitted. 

Units can be supplied without the sub-frame, this is a special-order requirement and Clearview need to apply this on behalf of the client. It does not alter the price, but measuring becomes far more critical as onsite adjustments can’t be made and gap filling around the unit must be considered. See our Quick GuideInstallation Guide

Face Fixing is where the Secondary Glazing unit is attached directly on to the face of the primary window frame, screw fixing through the front to the back of the secondary glazing.

Reveal Fixing is where the unit is attached to the side walls of the window reveal (the reveal is the depth of the window sill area) the screw fixings going in side to side / up and down. This is usually required if, (a) there is not enough frame on the primary window available to attach the unit to or (b) you want to increase the air-gap between the primary glass and the secondary glass to increase the sound-proofing performance.

See Face & Reveal Fixing

Other than drilling several small fixing holes into the existing window frame or surround, your primary window remains untouched and fully intact when you install Clearview secondary glazing. You will still be able to access your primary window all year and in most cases with a hassle free sliding or hinging option instant opening for ventilation cleaning and maintenance is assured.

Yes. In most cases Clearview can provide glazing units to fit most existing profiles, even complete circular designs, alternatively we can design a bespoke solution. if you send us some images we can offer advice, but in most arched cases we require a template for manufacturing.

View our Product Guides these show what shapes each system can accommodate

Skylight or Velux style windows, we also advise caution if trying to secondary glaze a window with a sloping or roof setting. it is critical to consider the safety and securing of both the frame and any moving/removable panels. Most sliding options do not perform well. We would advise a lift-out unit is probably best suited fitted with a locking bolt to secure the panel.

Clearview frames are available in a wide range of colour options. Clearview Secondary Glazing systems are supplied in White as standard. However, there are a number of stock colour options, Cream, Dark Brown, Grey & Black, these carry an additional charge over the standard finish.  200 Bespoke colour options are also available, price on application. see our Colour Range details 

No – in most cases, unless your room is already undergoing decoration, the installation of Clearview Secondary Glazing does not require your room or area to be cleared or covered, other than allowing access to the window area. Your room will be left in a comparable condition to before the installation.

Clearview secondary glazing is a bespoke product tailor made to the customer’s specific needs, each unit is built to meet the most effective solution for Appearance, Performance, Practicality and Price. As there are many options available so there isn’t a simple off the shelf price. As specialists in this field our consultation service is a great place to start. However, our online Supply Only Fastquote service can give you an instant price and is customisable to get your perfect design. For installation services please contact us

Access the My Account Page [click here]

Enter the Quote ref: CVxxxxx-x

Important: Ensure there is not a space/blank at the front of the reference, click to the left of the CV and press back space. This can often happen If you have used copy and paste to enter the reference, 

If you have forgotten or misplaced the quote reference number, please contact us confirming the full name and postcode used to generate the quote, and we will send you a copy. A quote reference number is only generated if you entered your contact details into the quote system. If you did not enter any contact details, the initial estimates are not saved and you will need to start again via FastQuote [click for new quote]

Enter Your Email Address: This must be the email address used to create the quote.

You will be sent a 6 digit security code to the confirmed email address. This can take a few seconds to come through, retrieve the code and enter it into the verification field & select verify.

Once you have accessed the My Account page:

Under the My Quotes Header, all quotes generated will be listed, select the Open tab at the end of the row with the quote reference number of interest.

Once the quote is open, you will see a pulsing triangle at the start of each unit listed, click on this to open all the modification fields you can adjust to modify the specification for your specific preferences.

Once changes are made and recalculated a new version number is created and stored in the My Account quotes list for future access simply use the Buy Now button to purchase. 

 

Access the My Account Page [click here]

Enter the Order ref: CVxxxx–x

Important: Ensure there is not a space/blank at the front of the reference, click to the left of the CV and press back space. This can often happen If you have used copy and paste to enter the reference, 

Enter Your Email Address: This must be the email address used to create the quote.

You will be sent a 6 digit security code to the confirmed email address. This can take a few seconds to come through, retrieve the code and enter it into the verification field & select verify.

Once you have accessed the My Account page:

At the top of the page under the My Orders Field you will see the order details and the options to View / Approve / Decline –

View the Order & select the option as appropriate.

If you unable to View the full Quote / Order it is likely you have an active “Popup Blocker”, this is a security setting on your device and needs deactivating or setting to “Allow Popup”, a notification can often been seen in the browser bar at the top right of the screen, giving you the option to allow popup. select this and try again.

If you are struggling to deactivate the popup blocker, review your web browser setting, help with this can be found via Google Support [click to access]

Our system and software is set to allow access from most devices including, PC’s, Apple and Android devices using most known browsers.

Should you continue to have any issues please Contact Us 

Once you have placed your order the sequence of events is as follows.

You will receive an instant payment receipt, this confirms the payment has been made, but does not confirm the order is accepted at this stage.

You will receive a separate email confirming the what happens next details

These emails will be sent to the email address used to generate the quote / order and is your main contact / account contact point.

The order details will be sent to our technical department for assessment and verification, subject to the time and day the order was placed, you will receive an order update notification, this is normally within 2-working days of payment.

In most cases the Order update will confirm the details have been verified and will request you make a final check and approval for production sign off. You will be requested to login to your account, View the details and Approve or decline the production.

If Approved – The order will move to production and progress updates will be notified in due course.

If declined – Due to a modification request, this will stop the order, you will be sent an email requesting the reasons and/or modification you would like to make. Once these are received we will update the order for you and re-run the approval process.

It is not until we receive your formal / final production approval that the order will be moved to production.

See our order progression and delivery details [click here]

If our technical evaluation finds the units cannot be made to the specification requested or the delivery location is outside our standard delivery capability, we will advise accordingly and confirm the options available. This may result in an uplift or decrease in costs, a full cancellation and refund, alternative shipping arrangements/charges.  

If you need any further clarification please Contact Us 

If you experience a problem with your order, Please refer to our:-

Returns & Rectifications Policy [click to view]

Terms and Conditions of Sale [click to view]

If you follow the recommendation and advice set out in our Help Centre Guides [click to view] this will minimise error. We want you to have the best service and outcome possible Contact Us if you would like to discuss this further.

Can’t find what your looking for?

  • Our Help Centre covers virtually all details on our products and services
  • Send us your  details via our enquiry form.
  • Contact Us Email is the best option as it ensures accurate information is managed and attended.

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