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CONTACT US

Heritage Aluminium
124 City Road
London
EC1V 2NX

Call us on 020 7459 4799

Email: info@heritage-aluminium.co.uk

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Copyright © Aluminium Trade Windows 2026
  • HOME
  • CATEGORIES
    • Heritage Single Door
    • Heritage French Doors
    • Heritage Bifolding Doors
    • Heritage Aluminium Windows
    • Aluminium Sliding Doors
    • Flat Roof Lanterns
  • DELIVERY INFORMATION
  • TECHNICAL
    • HOW TO MEASURE
    • INSTALLATION GUIDES
    • COLOUR GUIDES
    • GLASS FROSTINGS
    • GUARANTEE
    • SLIDING PATIO OPENING CLEARANCES
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    • CONTACT US
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Sash Glass Options

Sash Travel Restrictor

Sash Lifts

Sash Window Decoration

Sash Horns

Sash Hardware Colour

uPVC Thresholds

STANDARD THRESHOLD

 

MEDIUM THRESHOLD

LOW THRESHOLD

Fire Door Fixing Kit

Fire Door Thresholds

uPVC Window Handle Colour

uPVC Cills

Glazing Styles

NON-TOUGHENED FLOAT GLASS
Non Toughened Glass also known as Float Glass is a standard type of glass with good clarity and strength, while toughened glass is a specialized glass that has undergone a strengthening process to enhance its durability, safety, and resistance to breakage.

TOUGHENED GLASS
Toughened glass is preferred in applications where safety and strength are critical, while float glass is commonly used in general glass applications. All glass within 800mm of the floor level, connected to a door, and within a door are required to be toughened glass. We would also recommend all glazing over 1.4sqm to be toughened as standard due to safety.

TRIPLE GLAZING
This will be Toughened as standard. Triple Glazing helps reduce the thermal value of the glass, this can also help with Noise reduction.

ACCOUSTIC GLASS
Accoustic Glass is used for sound deddening / noise reduction. This will be supplied a Double Glazed Toughend glass unit with Accoustic finishing.

LAMINATED GLASS
This is required for PAS24 compliance and new build regulations. Laminated Glass is a Double Glazed Unit with a Lamination film applied to the external pane.

 

All our glass is A Rated Glass as standard, regardless of the makeup you require. Please see below the U-value Chart for the glass selections above.

Colour Charts

Opening (Viewed from Outside)

PRO TIP: Opening outwards doors are most popular when opening onto a patio. Opening inwards doors are most popular for a juliet balcony.

Outwards: Stood outside your home, both doors open outwards into the garden. Hinges are on the outside.

Inwards: Stood outside your home, both doors open inwards into the building. Hinges are on the inside.

Handle Style

Trickle Vent

Trickle Vents

A trickle vent in your door or window will give extra ventilation to the property

Air circulation is important to reduce moisture in the air and helps reduce condensation and mould

N.B.2 If you’re installing into a new build it’s now compulsory by law to have trickle vents fitted to all doors and windows

Cill

A cill sits underneath the frame and is there to drain rain water away. If you have an existing Cill this would normally be replaced unless its concrete. Ours are 30mm high, and we offer 4 different sizes:

95mm – With a 25mm projection, this is used when the frame is fitted forward in the reveal

160mm – With an 80mm projection, this is the most commonly used size

177mm – With an 97mm projection.

190mm –With a 120mm projection, this is used when the frame is fitted further back in the reveal

IMPORTANT: Enter ‘overall’ sizes including add-ons and / or cill if required.

Cylinder

*Brand may vary
Handle Colour

Commercial Doors Threshold

Commercial Threshold:

Double Ramp
Usually used when placed directly onto a floor with the same level internally as externally.

Note this option is NOT available with a sill.

 

Please note: Commercial pivot doors do not have a weather rating. In exposed areas it is possible that they can be blown open, this can lead to draughts / water ingress. Consideration for additional weathering such as a canopy or porch should be made when carrying out a site survey.

Glass Selections

How to Measure

1. Use metric not imperial

The first rule of thumb is to make sure you take accurate measurements in millimetres not inches. This gives you a finer level of accuracy and means there’s no room for error if we have to convert the measurement to metric.

2. Measure the opening outside

So firstly step outside. You need to take height and width measurements for the brickwork opening. Bear in mind that the height measurements must be from underneath any existing removable windowsill. If your property is rendered, simply take off a little of the render and measure to the brickwork edge.

3. Measure brick to brick in at least three different places

Remember the opening may not be exactly square so take a minimum of three measurements – top, middle and bottom, for the height and the same again for the width. This means your window manufacturer can get an accurate view of the exact size of the space the finished product will be fitted into. The final width and height measurement the manufacturer will use is the smallest one.

   

4. Deduct 10mm (yes, really!)

This sounds like odd advice but you need to take off 10mm from the final height and width measurements. This is to allow for a small fitting allowance around the new frame and means the fitter can make sure the new window frame sits squarely when it’s in place. Any gaps are then fitted with spacers and filled to keep the frame in just the right position.

5. Never measure the old frame

This is a common error and certainly one to avoid. Ignore the old window frame – this is going because it is no longer suitable. Consider the fact that it may well have warped so the last thing you want to do is take measurements from it!

6. Be sure of your measurements

Make sure you check (and double-check) your measurements so you are 100% sure you have them correctly. This is important because we will not accept responsibility for incorrect measurements and you will still have to pay for a window that doesn’t fit. If you are unsure, consult a professional installer or builder and give yourself total peace of mind.

7. Cill measurement

Taking all the above information in to account, when inputting your measurements we require you to provide us your overall brick-to-brick measurement minus the 10mm fitting tolerance. We will automatically include the cill in to the measurements you provide us – pending you require one that is!

If you struggle, or you would like us to contact you for piece of mind, once your order is placed just leave a note at the checkout asking for a call back!

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