Why do adhesives stick?

Adhesive tapes: how do they work, what should they be able to do, and what can they do?

Carpenter uses adhesive tape to seal a building

Considerable lengths of various adhesive tapes are used when sealing buildings.
A carpenter can be seen here sticking the interior corners of a window when working on the interior of a fire station.

Adhesive tapes are used as bonding aids in a wide range of applications in the creation of airtight building envelopes. Several hundred metres of tape are often used on a single building! Adhesive tapes have become established as bonding agents for these applications (just as nails are the standard solution for timber structures). They have to fulfil their functions for a number of decades to ensure that the building in question fulfils the standards expected by the energy consultant and by the building client. This article provides an overview of adhesive technology and the key properties of adhesive tapes typically used in construction. Continue reading

Air-tight building – why it is important

Protection from mould and heat loss

The air­proof­ing lay­er pro­tects the in­su­la­tion from mois­ture and con­dens­a­tion from the in­side, en­sures that the in­su­la­tion works ef­fect­ively and provides a healthy in­door liv­ing en­vir­on­ment.

The thermal in­su­la­tion sep­ar­ates the in­door from the out­door cli­mate. The tem­per­at­ure dif­fer­ence between the two cli­mates at­tempts to be­come equal­ised through the flow of air. This means in winter the warm air from the build­ing trans­fers through the struc­tur­al ele­ments to the out­side. The air­proof­ing lay­er pre­vents this air flow, the so-called con­vec­tion, and there­fore the loss of hot air to the out­side. The in­teri­or space is here not her­met­ic­ally sealed off – like us­ing a plastic bag – from the out­side air. In­stead, the ex­change of air from the in­side to the out­side con­tin­ues via dif­fu­sion.

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