Concealed spiral balance sliding sash windows are a great alternative to the traditional weights & pulleys sash window.
They are easy to use and meet the same quality standards, but tend to be more cost effective and ideal for new builds.
Instead of the weights & pulleys system, these windows use spiral rod torsion and tension springs in a self-contained balance for smooth and easy opening and closing.
Using only a water-based painting system which allows timber to “breathe” and adapt to climatic changes, our finishes provide maximum protection against weathering, fungal attack and UV degradation. The water-based application significantly reduces harmful emissions and disposal issues associated with solvent based systems.
Working with our paint partner, Remmers, we can finish in any RAL colour, stain, or match against all well known paint ranges and brands. With the ability to have different internal and external finishes, your windows and doors can be finished just as you require.
Our factory is audited quarterly to ensure that the finished product has the highest quality paint finish and performance you would expect.
Angel restrictor – this device limits the travel of the sash. The advantage is, when the sash is subsequently closed, the device resets. When the sash is next opened, the restrictor stops the movement of the sash more than 100mm.
Bespoke hardware maybe available for this product. Please check with our technical team for suitability.
This timber is the world’s leading high technology long life wood created from sustainably sourced, fast growing softwood in New Zealand.
The timber has an average density of 510kg/m3.
Accoya has extremely low thermal conductivity and is treated to match or exceed the durability and dimensional stability of the very best tropical hardwoods.
Accoya undergoes a propriety non-toxic acetylation wood modification process in the Netherlands that permanently modifies the wood structure to the core. This is achieved by reacting the wood with acetic anhydride which is forced throughout the body of the wood so that when Accoya wood is cut or jointed there are no exposed non-acetylated surfaces in any dimensions and does not weaken or affect the natural look of the wood.
This process negates any need to apply additional chemical preservatives. Once complete the ability of the wood to absorb water is greatly reduced rendering the wood more dimensionally stable because it is no longer digestible, increasing the lifespan of the timber.
This process also produces a harder and more consistent structure making it more resistant to denting and damage, produces a finer finish under sanding and the lack of water absorption from the paint leads to a better quality paint finish than hardwood and an increased lifespan of the paint coating in the longterm.
Due to the acidic nature of the coating, stainless steel fittings need to be used to help prevent corrosion.
Our most commonly used softwood timber for frames and sash. This timber
is made up of several different layers of dimensional timber glued and laminated together making the timber stronger, dimensionally stable and longer lasting.
The timber is engineered to remove knots and other unsightly blemishes and defects which reduce wastage compared to natural timber and is much more environmentally friendly.
The timber has an average density of 510kg/m3.
Engineered Redwood is more durable and lessens the effects of seasonal movement and shrinkage whereas natural timber can continue to expand and contract depending on the environment it is in.
After the primers and microporous water based paint finishes are applied they will last for the lifetime of the window with the correct maintenance.
Our most commonly used hardwood timber, Red Grandis (Eucalyptus Grandis, to give it its botanical name) is a South American hardwood sourced from sustainable and carefully managed timber plantations.
Red Grandis is a high grade, clear, knot free and uniform timber with a consistency of colour, appearance and workability. Red Grandis offers a legal, sustainable and fast growing alternative to uncertified Sapele or Meranti timber.
The sapwood is light grey or cream in colour and the heartwood is of a light red to pink in appearance.
Independently tested by a third party in the UK by TRADA (Timber Research and Development Association), Red Grandis achieved durability class 2 to 3 – durable to moderately durable, showing the hardwood to be a naturally
durable and fungi resistant timber. During structural testing, BRE (Building Research Establishment) tests also produced results of D35 for strength and stiffness properties and for C36 density.
Red Grandis can easily be stained to resemble Oak, Sapele, Meranti and a variety of other timbers or if left untreated can weather to a pleasing silver grey colour.
Acoustic Glass option
Sashes are fitted with pre-tensioned spring balances providing equal tension perfectly matching the weight of the sash. Sliding sash windows are manufactured with an optional ‘secret lift’ mechanism with the balances hidden from view in the frame for a more aesthetically pleasing product.
Sash fastening uses a sweeping cam sash locking fitch and keep. Window furniture includes a traditional style sash lift and sash eye providing a means to operate the sash, whilst providing a decorative finish. Window furniture is available in chrome, brass or satin.