Cable-in-Wall TV Mounting Guide¶

Run TV cables inside the wall for a completely clean installation with no visible wires. This UK guide covers Part P compliance, in-wall trunking, brush plates, fire safety, and step-by-step installation for concealed cable routing.

In-Wall Cable Routing Methods and Regulations¶

In-wall cable routing hides all TV cables behind the plasterboard for the cleanest possible installation. Two methods exist: Method 1 (pre-construction): install conduit and back boxes before plasterboarding. Method 2 (retrofit): cut holes for brush plates and route cables through the cavity. UK Building Regulations Part P applies to in-wall cable routing. Regulation 522.6.204 states that cables concealed in walls at depths less than 50mm must have additional protection (RCD, earthed metallic covering, or mechanical protection). Cables must run in safe zones: within 150mm of the top of a wall, within 150mm of an adjoining wall, or horizontally within 150mm of the floor or ceiling. Use PVC conduit (20mm or 32mm) for cable protection. Conduit must be continuous from the TV position to the socket position. Low voltage cables (HDMI, Ethernet, aerial) can run in separate compartments of the same conduit. Never run mains and low voltage cables in the same conduit. Use a multi-compartment trunking system (£20-£40) for segregated routing.

Step-by-Step Retrofit In-Wall Cable Installation¶

Step 1: Confirm the wall construction - stud walls and dot-dab walls have a cavity. Solid brick walls need surface trunking or channeling. Step 2: Mark the TV position and socket positions. TV centre at 105-115cm, socket at 20-30cm from floor. Step 3: Cut holes for brush plates using 80mm holesaw at both positions. For stud walls cut between studs. For dot-dab carefully cut through plasterboard to the blocked cavity. Step 4: Run PVC conduit between the two positions. For stud walls: cut access holes in each stud and thread conduit through. For dot-dab: route the conduit in the cavity between the plasterboard and block. Step 5: Feed cables (HDMI, power, aerial) through the conduit. Use cable lubricant for long runs. Step 6: Fit brush plates and comb cables through neatly. Step 7: Test all connections before closing up. For existing plasterboard walls with no cavity (dot-dab bonded to solid wall), in-wall routing is not possible. Use surface trunking instead. Professional installation cost: £150-£300 for two brush plates and cable routing in a stud wall.

Specifications and Comparison¶

In-Wall Method	Wall Type	Difficulty	Cost
Brush Plate + Trunking	Stud wall, cavity wall	Medium	£150-£300
In-Wall Conduit System	Pre-construction only	Easy (new build)	£50-£100
Surface Trunking	Brick, solid wall	Easy	£10-£30

FAQ¶


: . For more information see our TV Cable Concealment Complete Guide.

Last updated: 2026-05-31.

External Resources¶

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