Radiator installation and repair in Lighthorne

Almost always sludge sitting in the bottom of the radiator. Cold at the top is usually air. We check which it is before quoting anything.

Yes. Seized pins and failed TRV heads are one of the most common heating faults and a quick fix on most systems.

Setting the flow through each radiator so they all heat evenly instead of the ones nearest the boiler taking everything. It is included whenever we fit or replace radiators.

Yes. We check the output figures against the room heat loss first, because a lot of designer radiators look good and heat badly.

Cold at the bottom and warm at the top is sludge and corrosion debris settled inside the radiator. Bleeding will not touch it. The system needs cleaning, and that radiator may need flushing off the wall or replacing if it is badly corroded.

Completely different. Cold at the top with a warm bottom is air trapped in the radiator. Bleeding it and topping the system pressure back up usually solves it. If it keeps coming back there is either a small leak drawing air in or hydrogen forming from internal corrosion, and that needs looking at properly.

Usually balancing, pump performance or air. Water takes the easiest route, so radiators nearest the boiler get the flow and the far or high ones lose out. Balancing the lockshield valves across the house fixes most of it. Where it does not, we look at pump speed, the system pressure and circulation.

Yes. Single radiator swaps are routine, including moving one to a better wall or fitting a different size. We check the heat output needed for the room so the replacement is sized for the space rather than just fitting the same footprint.

Yes. Column and cast iron radiators, tall designer panels, vertical radiators and towel rails are all straightforward for us, though heavier units need proper fixings into masonry and sometimes pipework moved to suit the tapping centres. We survey before ordering so the radiator you choose actually fits and heats the room.

A thermostatic radiator valve controls the room temperature at the radiator. Best practice is a TRV on every radiator except the one in the room with the main thermostat, which stays on plain valves so the boiler always has somewhere to send heat. Replacing seized TRV heads and pins is one of the cheapest efficiency jobs there is.

Often yes, using freezing kits or by isolating locally, which saves draining down and refilling a large system. Where that is not safe or practical we drain, replace and refill with fresh inhibitor.

We run the heating from cold and measure the temperature drop across every radiator, then set each lockshield valve so the drop is even across the house. Done properly it means every room reaches temperature at a similar rate, the boiler returns cooler and condenses better, and the fuel bill drops.