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Timber Windows

Should I choose Weights or Springs?

Traditionally, all sliding sash windows were operated by cast iron weights.

Weights

A sash box of 98mm is built into each side of the window, which houses the weights. This is then attached to a piece of sash cord, which travels over a pulley in the top corners of the window and attaches to the sash that will be sliding. The weight is selected to closely match the weight of the sash that is sliding, so that a perfect counterbalance is achieved and movement of the otherwise heavy window sash is as effortless as possible.

Spring Balances

The use of weights and pulleys in modern sliding sash windows has declined over recent years, and has largely been replaced by the spring balance system. The Springs work using similar principles of counterbalancing, but achieve it through the use of two springs inside a PVC tube. Spring balances are normally visible on the inside of the window. However, a thin cover paint matched to the window and allow total concealment is used in manufacturing. This makes the windows with spring balances almost perfectly reflect the style of those with weights and pulleys.

To aid in opening windows, as well as hold windows open and closed, spiral balances utilize a spiral-shaped rod within a tube. This rod connects to a spring, which is what provides the tension for supporting the sash. The tension is adjusted by being wound to match the sash it is supporting.

Should I choose weights or springs?

Both systems have advantages and disadvantages, and the right system for you will depend on your location, the reveals in the window opening and the desired impact you are hoping for. Weight and pulley systems have an unmistakeable historic feel, they fit neatly behind traditional reveals, the systems last longer (many decades) and repair only requires fitting a new sash cord. Spiral balances systems fit neatly into all building/reveal profiles without reducing light.

If you would like a quote for sash windows with Weights or springs please get in touch.

Timber Windows - Meranti Hardwood

Meranti

Meranti is a versatile hardwood timber suited to a range of projects where aesthetic beauty is a priority. 

Whether your latest creation looks like a window frame, moulding, piece of furniture or general joinery job, this straight-grain wood is a hardwearing and easy to work with choice that can be machined, sanded and finished beautifully.

With straight-grain consistency, meranti trees produce long, straight pieces of lumber. It’s used for moulding, structure, furniture, cabinets, window and doors, and veneers for plywood. Meranti is one of the more affordable hardwoods due in part to numerous subspecies, prolific growing characteristics and availability.

Red meranti is not a tree species but a loose wood term that is used for lumber from trees of the shorea genus. In total there are over 190 shorea tree species and all part of the dipterocarpaceae family. These trees grow in the tropical rainforests all throughout Asia and are famous for their hardwood properties. Red meranti is a classification term based on wood properties like colour, hardness, density and weight. Trees like shorea leprosula and shorea ovalis produce top quality red meranti!

Red meranti is one of the most used and traded tropical hardwoods. It is difficult to work with hand tools because of its hardness and high density. Pre drilling is always advised when screws or nails are used.

Red meranti will absorb paint quick and multiple layers are often not sufficient. It is therefore recommended to use special oils that soak into the wood. This protects it from the elements and gives it nice colorations. Red meranti can be glued well but due to its high density it is advised to use special heavy duty glue.

Hardwoods generally come from broad-leafed, deciduous trees such as oak, beech and mahogany. The thing that defines a hardwood from a softwood is the presence of special pores in the cellular structure of the wood itself. Their complex cellular structure gives them a great dimensional stability and durability. Hardwoods are used in everything from musical instruments, boats, tools and of course, windows.

Why not request a hardwood window quote from Timber Windows Direct?