FOREVER BOARDS single hung windows have a fixed top sash and a bottom sash that raises and lowers. It is an economical alternative to a double hung (where both sashes move) ideally suited to customers who desire the appearance of a hung window but recognise the top sash does not need to open.
Single hung windows can also be locked with a security lock even when partially open giving ventilation with security.
FOREVER BOARDS double hung windows have top and bottom sashes that move to give extra flexibility with ventilation. They can be fitted with a keyed security lock which securely fixes both sashes together.