Home › System Upgrades › Radiator Installation & Repair
Radiator services across Wokingham · RG40 · Earley · Woodley · Finchampstead · Arborfield
Radiator services · Wokingham & RG40 · Gas Safe 599015
Radiator Installation & Repairin Wokingham
New radiators · Replacements · TRV upgrades · Valve repair · System balancing · Fixed price
Whether you need a single radiator replaced, a new installation, a leaking valve fixed or your system balanced — Thermotec provides professional radiator services across Wokingham and RG40. Fixed-price quote before any work starts. Gas Safe 599015. 120+ five-star reviews.
Radiator services — prices
All fixed price · Quoted before work starts
ReplacementFrom £150
New installFrom £200
TRV upgradeFrom £60 per valve
Valve repairFrom £96
System balancingFrom £120
Towel railFrom £180
★★★★★
120+ five-star reviews from Wokingham homeowners · Gas Safe 599015 · Fixed-price quotes · Same day where available
✓ Gas Safe 599015✓ Fixed price✓ All radiator types✓ Same day available
All radiator services — fixed price, Wokingham & RG40
Every job is fully quoted at a fixed price before Stuart starts work. No surprise charges, no hidden call-out fees.
Radiator replacement
From £150
Old radiator removed and new one fitted to the existing pipework connections. Includes draining, fitting, refilling and bleeding. All radiator types — standard panel, double panel, low-profile and column radiators across Wokingham and RG40.Get a quote →
New radiator installation
From £200
Adding a radiator to a room that doesn’t currently have one. Includes pipework extension from the nearest feed, radiator fitting, system refill and balancing. Fixed price quoted after viewing the room and assessing pipework routes.Get a quote →
TRV upgrade & replacement
From £60 per valve
Thermostatic radiator valves (TRVs) control individual room temperatures. Older TRVs stick, lose accuracy or fail entirely. Replacing with modern TRVs — or smart TRVs compatible with Hive or tado° — improves comfort and reduces heating bills.Book now →
Leaking valve repair
From £96
Dripping or leaking radiator valves repaired or replaced. Leaking valves cause damp, damage flooring and waste energy. Repaired same-day in most cases using parts carried on the van. All valve types across Wokingham and RG40.Book now →
Radiator bleeding
From £60
Trapped air causes cold spots at the top of radiators and inefficient heating. Stuart bleeds radiators and checks system pressure. If the problem keeps recurring it may indicate hydrogen gas from internal corrosion — diagnosed on the same visit.Book now →
System balancing
From £120
If some radiators heat up faster than others, the system needs balancing. Stuart adjusts lockshield valves across all radiators to ensure even heat distribution throughout the property — reducing boiler run-time and improving comfort.Book now →
Designer & vertical radiators
POA
Installation of designer, vertical, column and decorative radiators across Wokingham and RG40. Stuart advises on BTU output requirements for your room size to ensure the radiator you choose will actually heat the room adequately.Get a quote →
Heated towel rail installation
From £180
Central heating-fed heated towel rail installation in bathrooms across Wokingham and RG40. Includes connection to central heating pipework, filling and bleeding. Both straight and curved styles installed.Get a quote →
Is your radiator cold at the top or the bottom?
The location of the cold spot tells you exactly what’s wrong and what the fix is.
Cold at the top, warm at the bottom
Trapped air or hydrogen gas
Causes
- Trapped air — the most common cause. Hot water can’t rise past the air pocket. Fixed by bleeding the radiator with a radiator key.
- Hydrogen gas — if bleeding doesn’t fix it permanently, hydrogen gas from internal corrosion may be the cause. The system needs a powerflush.
- Faulty auto air vent — on sealed systems, a faulty auto vent can cause recurring air build-up and needs replacing.
Fix: Bleeding usually resolves this immediately. If it recurs, the system may need a powerflush or the auto air vent needs replacing.
Cold at the bottom, warm at the top
Magnetite sludge — very common in Wokingham
Causes
- Magnetite sludge — black iron oxide settles at the base of radiators, blocking hot water from the lower panels. Particularly common in Wokingham’s hard water area.
- One radiator affected — may be localised sludge. The radiator can be individually flushed or replaced.
- Multiple radiators affected — the whole system needs a powerflush to restore full circulation.
Fix: Single radiator — flush or replace. Multiple radiators — full system powerflush from £550. Very common in RG40’s hard water area.
Wokingham hard water and radiators: At 330–380 mg/L, Wokingham’s chalk water accelerates magnetite sludge formation inside radiators and pipework faster than most of the UK. This causes cold patches at the base of radiators, reduces boiler efficiency and can lead to premature pump failure. Stuart fits an ADEY MagnaClean magnetic filter and doses correct inhibitor as standard on every new radiator installation in Wokingham — protecting the system from day one.
What size radiator do I need?
Radiator output is measured in BTU (British Thermal Units). Getting the size right is important — an undersized radiator won’t heat the room adequately; an oversized one wastes money on purchase without meaningful benefit. Use the table below as a starting guide, then call Stuart to confirm the correct BTU for your specific room.
| Room type | Typical size | Suggested BTU | Notes |
|---|---|---|---|
| Living room | 15–25 m² | 4,000–8,000 | Add 10% for large windows or external walls |
| Bedroom | 10–16 m² | 2,500–4,500 | Less usage time — standard output usually sufficient |
| Kitchen | 10–18 m² | 2,000–4,000 | Appliances add background heat — can reduce BTU |
| Bathroom | 4–8 m² | 1,500–2,500 | Towel rail usually sufficient for small bathrooms |
| Hallway | Varies | 2,000–3,500 | Often poorly insulated — err on higher side |
| Older Wokingham property | Any | +20–30% | Single glazing, solid walls — significantly higher loss |
These are starting-point figures. The correct BTU depends on insulation quality, ceiling height, window area and external wall exposure. Stuart calculates this accurately for every new radiator installation.
Not sure what you need? Call Stuart and describe the problem — he’ll tell you what’s likely causing it and what the fix will cost.
FAQ
Why is my radiator cold at the top but warm at the bottom?
Trapped air is the most common cause — bleed the radiator with a radiator key to release it. If the cold spot returns within days, hydrogen gas from internal corrosion is likely and the system needs a powerflush. A faulty auto air vent on a sealed system can also cause recurring air build-up.
Why is my radiator cold at the bottom but warm at the top?
Magnetite sludge — black iron oxide that settles in the base of radiators. Particularly common in Wokingham’s 330–380 mg/L hard water area. If one radiator is affected it can be flushed or replaced individually. If multiple radiators have cold bottoms, a whole-system powerflush from £550 is needed.
How much does radiator installation cost in Wokingham?
Radiator replacement from £150. New installation from £200. TRV upgrade from £60 per valve. Leaking valve repair from £96. System balancing from £120. Heated towel rail from £180. All prices are fixed and quoted before work starts. Call 07850 116944 or book online for a quote.
What size radiator do I need?
Radiator output is measured in BTU. A typical living room needs 4,000–8,000 BTU; a bedroom 2,500–4,500; a bathroom 1,500–2,500. Older Wokingham properties with poor insulation or single glazing need 20–30% more. Stuart calculates the correct BTU for every new installation based on the specific room.
Does Wokingham’s hard water damage radiators?
Yes — the 330–380 mg/L chalk water accelerates magnetite sludge formation inside radiators and pipework faster than most of the UK. An ADEY MagnaClean magnetic filter and correct inhibitor dosing are the key protections. Stuart fits these as standard on every new radiator installation in Wokingham.
Can you relocate a radiator in my Wokingham home?
Yes — radiator relocation involves rerouting pipework and is quoted individually after assessing the room. Price depends on how far the pipework needs to move and whether it runs under floor or through walls. Call 07850 116944 for a fixed-price quote.
Related services
Areas covered
Wokingham & RG40 · Gas Safe 599015 · From £60
Radiator problem?
Radiator problem?
Fixed price, sorted today
Replacement from £150 · New install from £200 · TRV from £60 · Valve repair from £96 · Gas Safe 599015