Dry lining is not a familiar term to many home builders out side EU but it simply means broadly the outer skin of plasterboard, gypsum etc. of the interior walls of your building. However external wall cladding, ceiling linings and several other variants are too available as Dry Lining. It is fixed to the unfinished walls on wooden batons using mechanical fasteners or dabs of plaster. An interesting feature is that insulation can be incorporated within the air gap between the wall and the board finish.
The surface finishing of the dry lining is simple and may be given any type of color finish.
One of the major attractions of the system is the short period required to install saving you substantial labor costs while the incorporation of insulation against heat loss saves substantial energy costs as well.
The dry lining provides an architecturally pleasant finish (of virtually any color scheme).
The Thermal conductivity may be as low as 0.021 W/m-K.
It provides class 0 low risk fire rating. The ODP is zero. The water permeability is low and also allows quick response heating, thus saving substantial energy. The material used are also non-toxic or non-carcinogenic.
When used externally a phenolic insulated and a breathing membrane it provide an excellent exterior finish which can withstand many a rigors of adverse weather.
Dry lining has only a few draw backs relatively speaking. One of these is the use of synthetic insulating material which cannot be recycled economically. However when one considers it’s life span is running into several decades this factor may not be that significant.
Fastening of Dry lining
Internal dry lining may be fastened to the wall by several techniques. If the partition uses traditional timber or metal frames the initial insulation may be fiberglass or mineral wool filling the space between timber battens. The Insulated dry lining will be fitted to the timber of metal frame using proprietary mechanical fasteners. In pitched roof insulation the primary insulation would be a rigid insulation board such as phenolic foam with breathing membrane vapour barrier fitted between joists and a further it will be fastened under this with mechanical fasteners.
The U values of any insulation is the ultimate deciding factor how much energy your retrofit (or new insulation job) is going to save you in energy bills in the days ahead of you . This factor will vary with the different types of construction and insulation material that have been used in the project. Unfortunately only a few reputed manufacturers provide detailed research data pertaining to U factor of their products and its performance in conjunction with different constructional material. It is safer to go with one of these manufacturers for your requirement as it makes a designer’s job easy and reliable. Another important factor to look for is the conformity to Unified European Standards, ISI, BS and such stringent norms which no doubt will ensure the end users money is well spent.