Suspended floor insulation.

[hoppo4.2]

There are 3 rooms in our house that have suspended floors and they are cold!!

They also have a laminate flooring finish so taking them up is not an option at this time.

I can however squeeze and I mean squeeze under from an access hatch.

I also have a load of space blanket type insulation rolls.

So my question, is it worth the filth effort to get under there and staple the stuff under the joists?

If also noticed that the heating pipes all run under these floors and have no lagging at all. That along must be costing me a small fortune.

[B17NNS]

Yes it's worth doing. The pipes in particular.

[barryrs]

The financial payback will probably be years however im sure it would improve the homes environment day to day.

Bear in mind though that you could really do with a vapor barrier over the joists to prevent condensation forming them and the pipework; or
as a minimum use a breathable insulation type such as SuperFoil.

[hoppo4.2]

I think ill start with the smallest room and see what kind of difference it makes.

[Warmfuzzies]

I ended up taking up the entire flooring and laying 50mm of celotex in between the joists, and taping all the gaps

It has made a slight difference

K

[rustyuk]

I insulated our floating floor. Absolute nightmare of a job and it made zero difference! You need to use kingspan and seal apparently, but I can't see that making much difference either.

[B17NNS]

rustyuk said:

I insulated our floating floor. Absolute nightmare of a job and it made zero difference! You need to use kingspan and seal apparently, but I can't see that making much difference either.

Are you genuinely suggesting that there is no benefit to insulating a building properly?

[hoppo4.2]

I think the suggestion hear is that if the rest of the room is poorly insulated the floor will make no real difference.

Which is what I was thinking may be the case.

[TA14]

hoppo4.2 said:

I think the suggestion here is that if the rest of the room is poorly insulated the floor will make no real difference.

Which is what I was thinking may be the case.

It will make the least difference (out of ceiling, walls and floor.) It comes down to specifics. If you live in a windy area with good sub-floor ventilation and exposed floorboards nicely varnished and old with gaps between them then the insulation will help with heat retention by reducing draughts and preventing heat transfer.

As above, stage 1 is probably putting on something like this: https://www.screwfix.com/p/economy-pipe-insulation...