Understanding 'Listed' buildings

Once damp is present in a building, finding the source of the problem is the answer to solving it. As obvious as that sounds, damp can take years to start to form and can come from poor ventilation such as within a bathroom. Sometimes it can be an accumulation of more than one thing but what we do know is that damp and mould is bad for our health. In this article I have explained the use of permeable and non permeable materials within different ages of buildings. Damp occurs when moisture diffuses with air through a solid substance or surface. This effect can cause humidity, wetness, condensation and many other such factors involving moisture. Damp is a serious concern within any home, although the treatment required is determined on the home you have. The construction of buildings changed after the first world war and the building materials and structural systems completely changed. Cavity walls replaced solid walls for most domestic properties. Cement mortar superseded lime mortar and concrete became a big part of modern building. All these changes in construction prevent damp or moisture getting into the property or structure. Damp proof membrane, cavity walls and insulation are all types of new materials that all work to keeping moisture out. Original constructions are built to be breathable. Drafts are a part of the structure; they help move the air and damp throughout the structure. Permeable materials allow moisture to disappear freely. This system of the building requires sunshine, wind, heating and internal ventilation from windows and chimneys and draughts to stay dry. When the building is maintained, the system stays in balance. A major problem with damp within listed buildings are when present building materials and technology are being used on older original building methods. (incompatible materials). When a building is painted, a mineral or clay paint should be used, or even a lime wash. When a non breathable or permeable paint is used, the building is now being prevented from moving moisture, evaporating moisture and as a result damp, condensation and mould starts to occur.

What is Micro-strip blasting? There are different systems of abrasive blasting available. They all use varied types of media, run at different pressures, and are all best suited to specific tasks . Our micro-strip blasting process boasts both low pressure and low impact, which enables us to deliver our sympathetic, professional results. The main blasting systems and their key applications: Sandblasting - Machinery, cars, boats, rust removal, external brickwork Dry-ice blasting - Manufacturing industry, food production equipment Shot blasting - Metal works, chassis, trains, rails, steel, rust removal Soda blasting - heavy duty cleaning, fire damage, boat hulls, masonry Micro-strip blasting - Timers, beams, stonework, fireplaces, wood flooring

Green oak The name describes this unseasoned timber, which contains between 30% -80% moisture, it has nothing to do with the colour. As it dries, it can split, shrink and even move, but boasts durability, eco credentials and versatility compared to non-oak alternatives. It has a high work-ability due to this moisture and is easy to machine. Air-dried oak This semi-seasoned oak is usually cut to size and left to dry naturally. This drying process reduces the timbers movement, splitting and shrinkage but cut into large timbers this drying becomes difficult. The moisture content is around 20%-30%. Seasoned oak These timbers have undergone a slow, natural drying process that reduces the moisture content to approx 20% or below. They provide improved stability as all the movement has already taken place, but these timbers are not a visually gratifying as they usually display many splits and knots, Beams already insitu add character, heritage and personality to any property.