Inspired by a detailed UK carpentry guide. This walk-through is based on "How to scribe/cope and fit a radiator cover. The complete DIY guide" on YouTube. It covers scribing over skirting boards, which is the part most guides skip over, and is worth a watch if you have never done this before.
1. Measure the radiator and check the clearances
Measure the width of the radiator at its widest point, including any valve bodies that stick out. Add at least 50mm to each side so the cover does not touch the radiator or restrict airflow around it.
Measure the height from the floor to the top of the radiator, then add at least 75mm for the shelf and top rail. Note the depth too. Most standard covers are around 200mm deep, but if your radiator is unusually deep, check before you order.
2. Choose a flat-pack cover or build your own
Flat-pack MDF radiator covers from B&Q, Wickes, or online suppliers are fine for most jobs. They come in standard widths, adjust slightly with a saw, and paint up well with a couple of coats of satinwood. Most have a decorative grille panel and a plain top shelf.
Building from scratch with MDF sheet gives you more control over the design and dimensions, but adds a few hours to the job. For most rooms, a flat-pack cover painted to match the woodwork is perfectly good.
3. Check the wall for pipes and cables before drilling
The rear fixing rail will be screwed to the wall above the skirting board. Use a pipe and cable detector before drilling anything. Central heating pipes often run up the wall behind or beside radiators, and there may be electrical cables nearby too.
Mark the clear zones before you pick up a drill. It adds two minutes and avoids a very expensive mistake.
4. Scribe the base rail to follow the skirting board
This is the step that makes or breaks the finish. The bottom of the side panels needs to sit flush against the skirting board, which is rarely perfectly flat or truly vertical.
Hold the side panel in position against the skirting and run a pencil along the face of the skirting, scribing the skirting profile onto the panel. Cut carefully along the scribe line with a jigsaw, test it against the skirting, and trim again as needed. A good fit here means no gap and no rocking.
5. Fix the rear hanging rail to the wall
The rear rail is a horizontal batten that the side panels hang from, usually at the top of the cover just below where the shelf will sit. Mark its position on the wall, drill into brickwork or stud, and fix with appropriate wall plugs and screws. Check it is level before drilling the second fixing.
In older homes the wall may be slightly uneven behind the radiator. Pack out the rail with thin washers if needed so it sits flat.
6. Hang the side panels from the rear rail
The side panels usually have a precut notch or slot that hooks over the rear rail. Hang them in position and check they are plumb. If they lean in or out, adjust the rear rail packing.
Some covers fix the side panels directly to the wall rather than using a rear rail. If so, drill through the panel into the wall behind the skirting where the screw will be hidden.
7. Clip or screw the front grille panel into position
The front grille panel (the decorative piece with the slots or pattern) slots into the frame between the side panels. On most flat-pack covers it sits in a channel at the top and clips at the bottom. Check it is flush at each side before pressing it home.
The grille should be removable so you can bleed the radiator without dismantling the whole cover. Check access to the bleed valve before fixing anything permanently.
8. Fit the top shelf and touch up the paintwork
The shelf usually sits in a rebate at the top of the side panels and is pinned or screwed down from above. Check it is level, then fill any pin holes with filler and sand smooth once dry.
Prime and paint the whole cover before fitting if you can - it is much easier. If you have fitted it first, use a small brush to cut in around the wall joints neatly. Two coats of satinwood in a matching colour to the skirting boards ties it all in.
When to call a handyman
Scribing is fiddly if you have not done it before, and a poor scribe line shows. It is also worth getting help if the cover needs building to a non-standard size, if the wall is tiled behind the radiator, or if there are pipes that make the fixing positions awkward.
Richard covers radiator cover fitting and general carpentry work in Sandwich and East Kent. It is a half-day job at most once the cover is on site.
Need a radiator cover fitted in Sandwich or East Kent?
The Sandwich Handyman covers radiator cover fitting, small carpentry jobs, and general handyman work around the home.
Contact Richard