R-Value of Thermofoil: Does the orientation and position of the reflective foil influence the R-value?

Yes, the R-value of reflective foil depends on the orientation of the foil, ie. horizontal or vertical and the direction of heat flow. Air spaces of 20mm minimum are required for reflective foil to be effective. Foil laid over a ceiling lining with insulation on top has no R-value, it acts only as a vapour barrier.

R-Value of Metal Deck Roof Structures: What factors influence the R-value of a metal deck roof? (Commercial Roofing)

The installed R-value of the glasswool and foil are dependant on the thickness of insulation and the degree of compression of the blanket under the metal deck. A still airspace created by a ceiling increases the R-value of the foil component particularly for summer conditions where heat flows downward.

What is the correct position of the foil when laying Anticon?

In temperate areas the foil vapour barrier faces into the warm side of the building.

Do foil laps need to be taped on Anticon?

Only in areas where high humidity conditions are likely to be encountered in the building and there is a chance of moisture vapour then travelling through the insulation to the cold metal roof, eg. swimming pools.

Insulation specifications are often presented in terms of density. What are the densities of Bradford products?

Bradford Insulation makes a range of Glasswool and Fibertex Rockwool products to suit any airconditioning application. Densities have importance sometimes for application and mechanical reasons, but of equal or often greater importance, is the performance properties of the materials. Where possible the performance specifications of the Insulation (e.g. thermal conductivity, sound absorption coefficients, compression's resistance) should be specified or sought.

Why is Fibermesh 650 recommended generally when blanket insulation is to be used on pipework?

Flexible blanket insulation has much less compression resistance than Rockwool Pipe Insulation. This is partly related to lower density and partly to the flexibility itself. It is important that insulation compresses minimally in service, since compression means insulation reduction. Therefore the high density Fibermeshª 650 is recommended for pipe insulation where a blanket is preferred. The superb flexibility of the product ensures close contact around pipe circumference and the mesh reinforcement assists stability.