Astragal Glazing Bars
Double glazing companies that don’t appreciate balanced aesthetics, often provide the cheapest method of mimicking glazing patterns regardless of how real they look.
This is normally evident by putting Georgian "canes" inside the cavity of the two sheets of glass. They rarely look real and can highlight “cheap windows” immediately.
These cheap to produce, dull and extremely poor imitations of the real thing remain brilliant white and often out of character against the weathered feel of the rest of the window.
With Bygone sash windows you get authentic, three-dimensional, surface mounted astragal bars that are bonded, clipped and interlocked to ensure they never become detached.
Externally these are again “putty-lined” to match the chamfered sash, and have an Ovolo design internally to match the glazing beads. Melody has standard depth bars, while Harmony and Symphony have the deeper, more authentic glazing bars.
While most will want to match the patterns of existing or original glazing bars, any design, layout or pattern can be provided... just ask your installer.
'Deep' Georgian Bar and Glazing Bead
Providing the deepest, most authentic internal glazing bead and georgian bar, these windows look far superior to the standard plant-on bars seen on many windows. Interlocking the bars forms a durable grille which is firmly attached to the glass surface, while the bar ends are clamped in place using patented stainless steel Georgi-clips.
Having been tested by the BBA for 20,000 opening cycles (equivalent to 20 years usage) you can be certain that they'll stay adhered, we guarntee it! Generally other manufacturers simply rely upon a double sided sticky tape or plastic (not stainless steel) clips, never guaranteeing the adhesion of their georgian bars, let alone allowing you to open the window using the bars to do so!
You'll be able to do just that with the vast majority of your windows (very small windows or odd designs may not have georgi-clips) These deeper bars are not available in a gloss finish, but only white, cream or coloured wood foil finishes.
Sash windows usually comprise two sliding sashes, each retaining a double-glazed sealed glass unit. In most cases the window will be "split" equally in height so the visible glass will be the same height in the upper and lower units.
Aesthetically however, it’s important to have clean vertical lines that run through the upper and lower sashes. You’ll want the bars to line through and the Georgian squares to be of equal size.
Imitation or cheap windows often try to mimic this detail but invariably fail badly. Look closely at neighbouring houses and you’ll soon see the mish mash of glazing panes. Irrespective of which collection you choose, all Bygone sash windows can be designed to ensure sight lines align and panes within the same window are equal if required.
Balance Retaining Clips
Goods in transit are liable to move around a little. It’s entirely natural and pretty much impossible to prevent, be it movement in the factory, vibration on a delivery vehicle or being tilted whilst fitters are installing the window.
Not surprisingly then, balance springs can sometimes slip out of the "shoe" (a part designed to hold the balance and sash together). Detached balances generally mean a service call is required, something we activley seek to avoid by coming up with innovative designs and techniques. With every Bygone sash window the balances are held firmly in place with a retaining clip, that when snapped into position, locks the balance in place for life.
You will never need to see a service engineer for a detached balance and we won’t have a service call to make.
The new Antique Brass bar handle available on the Bygone range adds yet another truly authentic choice to our collection. Besides being beautiful and traditional, the bar handles would be a useful alternative to scroll handles for low threshold windows and would make opening the windows even easier.
Bespoke Bygone Branded Cam Catches
The weakest part on any original sash window was the locking mechanism or 'cam catch'. Burglars would flick the latch with a butter knife to gain entry.
This is not so with Bygone sash windows as every range has a beautiful selection of cam catches in either a traditional Beehive or Acorn motif with matching tilt release knobs. Look closely and you’ll see each keep has a nylon insert to protect the claw from being scoured. Four screws and two secret location pins hold every keep firmly in place even through rigorous testing.
Available in Antique brass, polished chrome, pewter, satin chrome, black or white finshes with matching limit stops and sash lift handles these are robust and solid, screwed directly into the steel reinforcement on the window for maximum strength. Bygone cam catches are left or right handed, which centralises the sashes in the frame making it SBD (secure by design) compliant and strong enough to act as a deterrent for any unwanted visitors.
Exclusive 'Porcelain Ball' Cam Catches
Standard on Bygone Symphony are the beautiful porcelain ball cam and tilt release latch knobs, available in tradition al Bygone colours of Pewter, polished Chrome or Antique Brass
They use the same solid stainless steel claw found on our Acorn or Beehive designs, however a beautiful Porcelain knob allows the claw to swivel efortlessly in your fingertips, recreating the traditional feel of original victorian sash windows.
Wood Grained Textured Finish
No shiny white plastic here!
As standard, each of our unique collections are made with beautifully textured, wood grained acrylic foil, and with any RAL or Farrow and Ball colour available they will look superb, especially in antique cream, green or classic black frames with white sashes.
Chamfered 'Putty-Line' Sashes
We know you’ll care as much about the authentic details of your windows as we do. Externally, old wooden sash windows had putty glazing which sloped back to the glass at an angle of 45 degrees. This lovely 'putty-line' is included on every Bygone collection window for this very reason. Internally, our beads are by contrast Ovolo shaped, just like on original Victorian and Georgian sash windows.
Our sash profiles are all multi-chambered. This means there are three individual pockets inside the PVC-U sections so that the galvanised steel reinforcement is inserted into its own sealed chamber. This is located well away from the separate drainage channel that allows rainwater to run away easily.
Whilst Bygone Melody sash windows have the standard beads and glazing bars, both Harmony and Symphony have the larger more traditionally detailed versions and as a result can accomodate slimmer, Krypton gas filled glass units.
Water has a knack of finding any weakness, however small. Sash window joints are no exception, which is why we have invented adhesive foam pads that seal the joints between the cill and the frame. Every window on each range has these bespoke pads as standard, so you’ll never need to worry about leakage as they prevent any chance of water ingress
In addition to this, the brush piles are cut back to prevent them acting as wicks and by absorption, drawing water into your home... as a final preventative measure for your complete peace of mind we also add a short silicone seal as well, just to be sure.
Don't take chances with your home. By spending a little extra during the manufacturing process you’ll be protected from the inconvenience and disappointment of damp walls, wet carpets or worse.
Deep Bottom Rail
Alas, these days very little attention is given to a window’s sight lines or how it is framed in an opening.
Traditionally, the lower rail of the bottom sash was often made from 4" or 5" timbers and planed to about 100mm. This was substantially heavier (deeper) than the side members or mid-rail because it had to carry more weight than the upper sash.
While it is far quicker, cheaper and easier to weld together profiles of equal size, it would not look traditional. All Bygone collection windows have this thicker, butt jointed deep bottom rail as standard, mechanically joined by hand in our factory.
The exclusive deep GRP cill available as an option on the Symphony sash window is a beautiful feature designed to achieve the authentic appearance of an original 3” timber, useful for use in a Conservation Area.
The deep 56 mm cill is indistinguishable from the other PVC-U sections because all are bond wrapped in the same Renolit foil to maintain the appearance of timber.
The deep cill is 16.8 times stronger that a regular cill and this strength allows larger and more unusual windows to be replicated more authentically, for instance where required in sea front hotels, renovated / converted former schools, industrial buildings and ecclesiastical buildings.
Dummy Sashes and Fixed Windows
Not all windows need to open, providing you have sufficient opening area for the floor area. An opening of 1/20th is normally recommended.
In order to retain equal sight lines or occasionally to offer you a saving, it is possible to make dummy sashes. These are real sashes made in the same fashion as sliding ones. We simply leave the window furniture, hardware and balances out, leaving you with a great looking, unopening window at a reduced cost.
'Continuous' or 'Run-through' Horns
Originally sash horns were built into the window to act as “stops” to prevent sashes being over-extended, smashing the pulley wheels or damaging the lead weights inside the box framework.
Today sash horns are purely decorative as there are other types of “stops” now in use, however they are still needed to fully replicate and retain the traditional appearance of your box sash windows.
Unlike decorative, “clip on” horns which can become detached, look artificial and have a tendency to fade, all Bygone sash horns are sculptured from the sash itself. Commonly known as “run through” or “continuous" horns”, these are fitted with flush fitting end caps to close the chambers.
Extrusion companies who design the PVC-U profiles, always recommend that sashes are fully reinforced with steel to provide structural strength and to deter burglars.
This helps prevent deflection in windy weather and to structurally reinforce the sashes so they are capable of carrying the weight of the glass, and provides a strong secure fixing for the handles, latches, and other components.
As you have probably already guessed, not every company complies with these rules. Some will reduce costs by removing this reinforcement altogether, so you just have flimsy plastic with no reinforcement. Others use plastic to reinforce plastic, cutting corners, but charging over the odds.
Every Bygone sash window (apart from curved head windows for obvious reasons) has a length of galvanized steel reinforcement that is a full 1.5mm thick, not the 1-1.2mm that is sometimes offered by others. So rest assured that your Bygone windows will be far stronger, more secure and substantially heavier than others... they are simply built to last.
Most people push, pull, or lift their sash windows using the Georgian bars. This is despite most windows having handles... even you! (just watch yourself next time…)
Whilst Astragal bars add character and charm to the window and recreate the original look, using them as handles can put considerable pressure on them, causing them to come off in your hand whilst the window remains shut.
Typically, bars are stuck onto the glass as a series of small individual bar sections mitred together. This increases the opportunity for shoddy joints and for the number of bars that could fail. Virtually every window company specifically excludes plant-on Georgian bars from their guarantees for this reason.
Our windows are unique.
Clever, patented inter-locking joints where the bars meet, together with Georgi®-clips (patented to our company), mean that each bar is continuous and cut to the full size of the sash. Each bar is secretly notched so they are inter-locked, clamped and then bonded against the glass surface. We are so confident with this technology that you can open and close any of our sashes using the bars. They won’t come off, which is why they are covered by our fabulous 12 year guarantee.
Lift-Out Pivot Bars
Windows are not just for letting in light and keeping the elements at bay – sometimes they need to be used to move in large objects of furniture such as a table or settee. All Bygone sash windows have 'split pivot bar' technology so you can remove the sash without the need to tamper with the intricate balance mechanism. This two-part pivot bar system allows sashes to be removed and reinstated quickly and safely.
Pole Eyes and Scroll Handles
It is customary to have a “ring pull” or “pole eye” fitted to the centre of the top rail on the upper sash (a swan neck hook and pole can be supplied if required).
Alternatively, a “D-Handle” can be fitted to the underside of the top sash if requested.
Scroll handles are fitted to the inside bottom of the bottom sash by the installation team once the windows are fitted. Some clients prefer to leave them off, others have specific ideas for where they wish to see them fitted. Ordinarily they should align with Georgian bars or be equidistant between them.
All Bygone sash windows can be tilted inwards to make cleaning easier and safer. Particularly large sashes cannot be allowed to tilt for cleaning as the sash is simply too heavy, exceeding the maximum permissible weight to be tilted safely.
Lighter sashes can still be heavy, but those exceeding the maximum sizes an also be dangerous. That’s why uniquely, on every Bygone window that exceeds the safe size for the standard easy clean tilt restrictors, we fit a shorter pair of safety stays. Therefore if a large window should be accidentally opened, it will remain vertical, unable to damage anyone or anything.
We are the only manufacturer to fit safety stays to oversized sashes. Although they do not allow for cleaning, they WILL prevent accidents.
Traditional 'Butt-Jointed' Construction
Welding joints are quick and easy to manufacture, but a diagonal line isn’t a traditionally accurate feature on wooden sash windows. That’s why on our premier range, Bygone Symphony, each joint is traditionally butt jointed using patented Timberweld ® technology as if it was a timber original.
The result is stunning. Beautiful joints with arressed edges, replicate those on wooden sash windows perfectly, making Bygone Symphony virtually indistinguishable from timber originals. These joints are available as chargeable extras on Bygone Harmony, but not on the Bygone Melody.
Travel Restrictors or Limit Stops
These are devices that prevent a window from opening beyond 100mm, particularly useful for bedrooms.
There have been several variations of travel restrictors, from a simple nail or screw bolt going through both sashes into chunky wrap around locks or plastic spring loaded catches.
These are often bulky, fiddly for the elderly or visually impaired and invariably sit proud of the face of the sash. Bygone collection limit stops have been specially commissioned to our bespoke design to sit flush in the surface of the sash and securely screwed into the steel reinforcement. This reduces wear on brush piles and prevents draughts for years to come.
In case you’re wondering why there are two limit stops on your windows it is because experience has shown that fitting just one, will over time cause the lower sash to twist.
The constant banging of the lower sash against the limit stop forces the lower sash into a trapezoidal shape, loosening the glass setting blocks, which leads to the glass becoming loose in the sash.
By fitting a pair of limit stops, any force from banging the sashes is equalised, actually keeping the sashes square for the life of the window and aesthetically balancing the appearance of the window.
Building regulations yoday require windows to be capable of being cleaned easily from inside the building. Therefore Bygone sash windows have a tilt mechanism to facilitate easy cleaning, much to the delight of our customers.
Short spring-loaded "bolts" engage the sash behind the frame section, while standard ones are mainly plastic and not too strong. They are often fiddly or cumbersome to operate.
Not with Bygone sash windows, as every window has the “sash secure” ™ steel reinforced and wrap around finger latches, designed to centralize sashes within the frame and increase the strength and security of our windows. They come with a choice of Beehive or Acorn designs on the cam claw and tilt release knobs, and are available in Antique Brass, Pewter or polished Chrome.
This name is a registered Trade Mark that describes a unique patented method of construction that produces traditional timber style butt joints.
Timberweld® technology in summary: -
- The all-important advantage of a product that incorporates Timberweld® technology is that it is beautiful and authentic, looking every bit like a timber original and giving the impression that it has been lovingly produced by a master craftsman.
- Most butt joints in the market today are open ended however, your Timberweld® joints are completely sealed from the elements with no open chambers to allow in rain water, draughts, bugs and flies!
- Aesthetically, Timberweld® joints will blend in with all architectural styles, Georgian, and Victorian, and will be suitable for use in both conservation areas and in the most contemporary developments. The technology is aterial neutral and in the case of PVC-U, Masterframe sash windows will be the perfect match for casement windows and doors that are offered with Timberweld®.
As a result of this innovation, Masterframe is the ONLY PVC-U sash window manufacturer that can promise you an authentic, Timberweld® wood effect joint, complete with perfectly sealed frames and corners that look just like the timber originals.
Tilt restrictors are metal side arms made from stainless steel, that allow sliding sashes to be tilted for safe cleaning. With sashes often weighing over 40lbs in weight it is vital that a pair of stays is fitted to each sash, both top and bottom.
Some companies will save costs by fitting tilt restrictors to the lower sash only, or by fitting just a single tilt restrictor to each sash.
This is a false economy, as a pair of tilt restrictors on each sash provides double the safety. Without them there is a risk that sashes could crash into the room damaging furniture, walls or possibly injuring yourself or a family member.
Some designs of tilt restrictor are extremely sharp, acting similarly to scissors and cutting through the brush pile, reducing the effectiveness of the brush seal every time they are opened or closed, which in turn allows in air and creates a draught.
On our windows, these edges are especially rounded to ensure the tilt restrictor rolls past the brush pile, leaving the pile to do its job, preventing draughts.
'Torso' Spiral Spring Balances
These make your sash windows work – just as the weights and pulleys did in the original single glazed, timber windows.
Originally on timber windows, the weight of the glass and sash were counter balanced by a lead weight dangling on the end of the cord.
These counter weights meant that wooden windows would open easily (when not already painted shut) and remain in the position required, because the glass and timber sash weight was equal to the lead weights, thus keeping the sash counter-balanced.
Little or no effort was required to move the sash because there was no friction between the sash and the frame, that’s why they often rattled and were draughty.
'Torso' balances are the Rolls Royce of spring balances. Designed by a Dutchman in 1946, they epitomise great engineering. Individually manufactured in 0.5kg increments (1lb), and for perfect lengths, these balances have two springs; one wound clockwise, the other anti-clockwise.
As a sash is opened, so one spring extends getting longer as the other compresses, getting shorter, counterbalancing each other for their entire life. They are immensely reliable and incredibly durable.
It is vital to have good ventilation, as without it people can suffer from breathing difficulties caused by poor air quality. Original box sashes provided 'natural background ventilation'… known as draughts.
The current building regulations for new buildings offer four system possibilities of achieving background ventilation. The most common adopted methods incorporate the use of trickle vents. Your architect will specify which method has been designed into your property.
When replacing existing windows the rules are slightly more relaxed. If trickle vents are present in the existing windows, they need to be incorporated into the new windows, however we would prefer not to fit them because they provide a super passage for airborn dirt, wind and noise to pass straight through our windows.
We would prefer you used sash windows properly, with both the top and bottom open. Sash windows are more efficient at purge ventilation and changing air than ANY other style of window.
For more information see health benefits.
There is nothing much to worry about with our windows – its just the sashes we make can be very heavy and we’d like to remind you of this before you try tilting them inwards for cleaning. They have been tested not to fail, but its far better to be safe than sorry…
Window Furniture in Suited Colours
If you are considering cheaper alternatives where companies simply decide handles, cams, keeps and knobs by price alone, you’ll end up with three or four different shades of brass on the same window.
Because we use just one supplier for all of our Bygone bespoke furniture, they guarantee that all the individual pieces of furniture on Bygone sash windows will match. Every component will suite together and cam catches, knobs, limit stops, pole eyes and sash lifts (scroll handles) are available in Antique Brass, Pewter, polished Chrome, satin chrome, black and white.