Extractor Fans
In this regard electrical extractor fans are a relatively cheap and easy to fit solution to quickly freshening a room without the potential for draughts http://www.simplifydiy.com/electrical/extractor-fans
Ceiling Insulation
Put simply uninsulated ceilings cost you money and nowhere is this more noticeable than in your loft space http://www.simplifydiy.com/walls-and-ceilings/ceiling-insulation
Wall & Ceiling Plaster
This is used for the top and final coat on a wall or ceiling as it produces a fine smooth finish when it has been polished http://www.simplifydiy.com/walls-and-ceilings/plaster