This is a membrane typically used to provide a suitable substrate for laying another product, i.e. such as for a liquid applied waterproofing system to be applied onto. Refer to individual waterproofing manufacturers for specific recommendations on when such layers are required, and if they are what is used for them.
Insulated extrusions for closing wall cavities at openings such as window reveals and door reveals. Cavity closers reduce heat transfer, avoiding thermal bridging, condensation and mould growth. They can even be used to pre–form openings when window and door frames are fitted later. Kingspan Kooltherm Cavity Closer and Kingspan Thermabate are examples.
This shows compliance with EN and CEN standards.
Insulation such as polyurethane, polyisocyanurate and phenolic insulation, which is made up of small individual cells.
Centres of rafters / joists
The centres of joists or rafters are measured by taking the centre point of one joist/rafter to the centre point of the following adjacent joist/rafter. Timber joists and rafters are traditionally located at 400 mm, 450 mm or 600 mm centres, or in refurbishments sometimes their imperial approximate equivalents of 16, 18 and 24 inches.
Closed cell insulation
This has a more compact and denser structure than open cell insulation. As a result, it decreases the ingress of moisture and is more resistant to heat transmission. Insulation with a closed cell structure is also more resistant to flood damage. Because of its low water take–up, closed cell insulation panels recover from immersion in flood water more quickly than mineral fibre insulations for example.
A type of thermal bridging that occurs when a structural element of a building lets heat flow through it because it has a lower thermal resistance than other components in the construction.
The measure of how much a material changes under long–term load. Heavy duty insulation materials ideally have a low compressive creep so they have a suitable durability in heavy duty applications.
A material’s ability to maintain its structural integrity when compressed. Insulation products with a high compressive strength such as Kingspan Styrozone are used for heavy duty floors and roofs.
The conversion of a substance (typically water when referenced in the construction industry) from the vapour state to a liquid due to a change in temperature or pressure, e.g. such as warm moist air hitting a cold surface causing: a reduction in temperature of the air; and moisture vapour to condense out of the air. The two main occurrences of condensation are:
- Surface condensation which can lead to mould and staining through its formation on the visible surface of a material.
- Interstitial condensation occurs between the layers of a construction. This type of condensation can both reduce the effectiveness of insulation components and reduce their lifespan.
Condensation Risk Analysis is performed on the construction elements of a building, taking into account the order in which they appear, and the building’s geographical location. Our technical department present CRA with U–value calculations.