Gone West

No that was Waxoyl.

Like it. Have you had any ducks walking up the ramp yet and if so does it tip up a bit.

wot like 'Thermal Mass' whoops.

I've already tried that.

Can't you plumb the waste rigid with a longer telescopic U bend?

Four years ago we paid :- 6 * 2.5m x 150mm £369 13 * 2.5m x 100mm £550 Including VAT and delivery.

It's the rate at which heat is lost through a material. It's difficult to model accurately and there are endless constructions to reduce the effects. The effects are more pronounced where there can be a build up of heat on the outer surface such as on the walls of a well sheltered house. Where we are, near the coast in an open area, the effects are non existent because when the weather is hot there is always a sea breeze. https://www.greenspec.co.uk/building-design/decrement-delay/

We used EverEdge Halestem for edging our driveway, paths and lawn. There are different sizes for different applications. https://www.everedge.co.uk/product/halestem/

Let the radiator try to get hot on the first 1/4 turn and see if the hissing stops when it's hot. There are additives that can be added to CH systems to stop noise.

From what I read years ago it works, but only well, on a large scale.

So increasing the heat output by making it a triple panel would increase the heat going into the room by 50%. Many years ago my parents lived in a very old solid walled house and it was very warm because they had radiators that were large enough to keep it warm, around 22C, with an LPG boiler. Your ASHP will deliver much cooler water to your radiators so your radiators should be proportionately larger.

Is it a single, double or triple panel and is it a convector radiator ie does it have fins?

Oh no he won't.

The panel may be the largest you can fit in the room but you can buy triple or even quadruple panel radiators so I would be surprised if they were the largest heat output radiators around.

What you're saying when you say "it's just the rooms that are unbalanced" means the radiator is too small for the room.

So is the radiator in that bedroom consistantly the same temperature as the other radiators and it is the room temperature which varies.

I've already asked and was told no.

I would get a few more quotes for comparison because it does seem cheap.

There was a large variation in the quotes we had for asbestos removal. We went with the cheapest which was around a third of the most expensive. We paid £3850 for removal and disposal of 110m2 of asbestos sheets and £550 for disposal of roof slates which I removed.

You can always dream . It's what keeps me going.

The second layer may have been fitted first to reduce draughts then at a later stage it was reroofed and a proper layer of felt was laid under the tiles.

Has your architect calculated the level of solar gain through all these roof lights. The g-value of the glazing could be critical for comfort levels in the rooms affected.

If so then can't you remove the joists and increase the height with EPS/PIR to match whatever the extension is going to be. Then run the UFH over the whole area.

It's definitely a good idea to have a break occasionally. If the other radiators either side in the run are warm then they should all be warm. Any 'delay' would affect them all. If that one radiator behaves differently from the others it could be the TRV or air bubbles.