Underfloor insulation with less disruption?

[SH]

[Theo]

covers some of the queries I had about access, ventilation and pipework.

Theo

[alan_m]

And spraying foam on electrical cables?

[Theo]

<quote>

What are the implications for services and maintenance?

Hot water pipes are normally insulated (except where there is a valve or service point).

Fresh water and gas pipes run along the ground, or middle of the void, and therefore remain in a ventilated space in accordance with the Building Regulations.

Electrical cables are normally left uninsulated, but can be insulated if the rating is checked by a qualified electrician. Most electrical wiring runs along the floor and only passes through the floor where it enters and leaves the void. The application of insulation can be accurately controlled in order to avoid encasing wires in these areas.

To help maintenance an access hatch can be made near the services and a floor plan created of the void and services below. The maintenance hatch is formed by spraying insulation into a bag to form a mouldable plug to ensure continuity and air tightness. </quote>

[Andy Burns]

It says it doesn't do that.

[alan_m]

So they will not spay any joist where a cable is clipped? What about chemical interactions between foam and electrical wire insulation layers?

[Steve Walker]

No chance here then, with power, lighting, central heating, satellite and network cables, plus water, central heating, gas and air (for fish tanks) pipes running in every direction and old, redundant wiring and piping laying all over the ground.

[Steve Walker]

Which would rule out pretty well all of my underfloor area!