City windows firm has smashing sales By Calum MacLeod Published: 06:45, 18 January 2021 Get the Inverness Courier sent to your inbox every week and swipe through an exact replica of the day's newspaper Inverness manufacturer Cairngorm Windows recorded an unexpected 66 per cent leap in domestic sales in the last six months of 2020. âIf youâd suggested that to me in March, Iâd have thought you were mad,â admitted David Dowling, who has stepped aside as managing director to become chairman of the 68-year-old family-owned group. âWeâve probably made up for the three months we were shut during lockdown. âWindows sales are up by 70 per cent from July to December compared to the same period in 2019, while conservatories and fitted kitchens each increased by 30 per cent.