Allan Brothers is the longest established window company in the UK, with unparalleled expertise in timber craftsmanship. Generations of timber craftsmanship Tradition is important to us and while much has changed in the industry, our love of hand-crafted excellence has endured. Combining centuries-old methods with the latest modern technology, we’re able to produce solid, high quality timber windows and doors that will last for decades. Hand-made windows and doors Using time-honoured processes and methods, we’re able to consistently manufacture quality timber casements and vertical sliding sash windows. In addition we also offer single, double and bi-folding doors and a range of aluminium clad systems.