.jpeg)
.jpeg)
Building a radiator cover yourself costs an average of $40 to $200 in materials, depending on the size and material choice. A ready-made radiator cover costs $80 to $400. The difference? Building your own results in a cover that fits your radiator exactly, in your style and with proper ventilation. In this guide, you’ll learn which materials work best, how to minimize heat loss, what the costs are and how to build a neat radiator cover step by step.
What Does a Radiator Cover Cost? DIY vs Buying
Cost Comparison
| DIY (materials) | Ready-made | Custom-built | |
|---|---|---|---|
| Small radiator (24×16 in / 60×40 cm) | $30 – $80 | $60 – $150 | $150 – $350 |
| Standard radiator (32×24 in / 80×60 cm) | $50 – $120 | $80 – $250 | $200 – $450 |
| Large radiator (48×24 in / 120×60 cm) | $70 – $170 | $120 – $350 | $250 – $600 |
| Double/wide radiator (63×24 in / 160×60 cm) | $90 – $200 | $150 – $400 | $350 – $750 |
Prices include board, battens, paint and hardware. Excluding tools.
When Is DIY Worth It?
In most cases, DIY is worth it:
- Perfect fit. Ready-made covers come in standard sizes. If your radiator doesn’t fit, you’re stuck with a cover that’s too big or too small.
- Style. You choose the grill pattern, color and finish yourself. From sleek vertical slats to classic woven grilles.
- Custom ventilation. With a self-built cover, you decide where and how large the ventilation openings are. This is crucial for maintaining heat output.
- Cost. A simple MDF radiator cover can be built for $50 to $80. A comparable ready-made one easily costs $120 to $250.
Maintaining Heat Output: This Is the Most Important Part
A radiator cover is only good if it doesn’t block the heat. A solid enclosure around your radiator can lead to 20-30% heat loss. That costs you hundreds of dollars per year in extra heating bills.
Rules for Ventilation
| Measure | Why | How |
|---|---|---|
| Ventilation grille on the front | Warm air must reach the room | Use a grille, louvers or perforated panel with at least 40% open surface area |
| Open top or grille on top | Warm air rises and needs to escape | Leave the top completely open, or use a grille |
| Open bottom (2-4 in gap) | Cool air must reach the radiator | Leave at least 2 in (5 cm) of space between the floor and the bottom of the cover |
| Space behind the radiator | Air circulation around the radiator | Keep at least 1-2 in (3-5 cm) between the back of the cover and the wall |
| Reflective foil behind the radiator | Reflect heat into the room instead of into the wall | Apply radiator foil to the wall behind the radiator ($5-$15 per roll) |
The golden rule: the more open surface area, the less heat loss. A cover with a perforated MDF panel on the front, an open top and an open bottom has virtually no impact on heat output.
Heat Loss by Cover Type
| Cover type | Heat loss | Recommendation |
|---|---|---|
| Open front + open top + open bottom | 0 – 5% | Ideal |
| Grille front (40%+ open) + open top | 5 – 10% | Good |
| Grille front + grille top | 10 – 15% | Acceptable |
| Solid front with small openings | 20 – 30% | Not recommended |
| Completely enclosed | 30 – 40% | Absolutely avoid |
MDF vs Solid Wood: Which Material to Choose?
Materials Compared
| Material | Price per sq ft | Workability | Finish | Advantages | Disadvantages |
|---|---|---|---|---|---|
| MDF (3/4 in / 18 mm) | $0.75 – $1.40 | Very easy | Paint (primer + paint) | Smooth, no knots, easy to route, cheap | Not moisture-resistant, heavy, dust when cutting (wear mask) |
| Moisture-resistant MDF | $1.10 – $1.85 | Very easy | Paint | Better against moisture than standard MDF | Slightly more expensive |
| Plywood (3/4 in / 18 mm) | $1.40 – $2.80 | Easy | Paint, stain, oil | Stronger than MDF, nice visible layers | More expensive, edges less smooth |
| Pine (solid) | $0.95 – $2.30 | Moderate | Paint, stain, oil | Natural look, strong | Can warp, knots, more expensive |
| Oak (solid) | $2.80 – $5.60 | Moderate to difficult | Oil, stain | Luxury look, very strong | Expensive, heavy |
| Perforated MDF panel | $1.40 – $3.25 | Easy (cut to size) | Paint | Ready-made ventilation grille | Limited patterns available |
Most popular choice: MDF. The vast majority of radiator covers are made from 3/4 in (18 mm) MDF. It’s cheap, easy to cut and route, and after painting delivers a smooth, clean finish. Combine MDF panels for the frame and sides with a perforated MDF panel or wooden slat grille for the front.
Important with MDF: always wear a dust mask (N95/FFP2) when cutting and sanding MDF. The fine dust is harmful to your lungs.
Determining Dimensions
How to Measure Your Radiator
Measure the following dimensions of your radiator:
| Measurement | Where to measure | Allowance |
|---|---|---|
| Width | From left end to right end of radiator | + 4 in (2 in on each side) |
| Height | From bottom to top of radiator (including thermostat) | + 4-6 in on top + 2-4 in on bottom |
| Depth | From wall to front of radiator | + 1-2 in (air space) |
Example: Your radiator is 32 in wide, 24 in high and 4 in deep. Your cover will then be: 36 in wide x 30 in high x 6-7 in deep (outside dimensions).
Don’t forget the thermostat. The thermostat knob protrudes and must remain accessible. Measure its position and leave an opening or make a cutout.
Don’t forget the pipes. Radiators have supply and return pipes, usually at the bottom or side. Make cutouts for the pipes so you can install the cover without disconnecting the plumbing.
Materials and Tools
Material List Standard Radiator Cover (36x30x7 in / 90x75x18 cm)
| Material | Quantity | Estimated price |
|---|---|---|
| MDF 3/4 in (for top and sides) | 1 panel 48×24 in (top + 2 sides) | $10 – $20 |
| Perforated MDF panel (front) | 1 panel 36×26 in | $15 – $30 |
| MDF strips (1×3/4 in) for frame | 4-6 pieces, 30 in | $5 – $10 |
| Corner brackets | 8 pieces | $5 – $10 |
| Wood glue | 1 bottle 250 ml | $5 – $8 |
| Screws (#6 x 1-1/4 in) | 1 box (50 pieces) | $4 – $8 |
| MDF primer | 1 pint | $8 – $12 |
| Acrylic paint (solid white or color) | 1 quart | $12 – $20 |
| Sandpaper (120 and 180 grit) | 5 sheets each | $3 – $6 |
| Radiator foil (optional) | 1 roll (16 ft) | $5 – $15 |
Total material costs: $70 – $160
Tools
Essential:
– Cordless drill with bit set
– Jigsaw or circular saw
– Tape measure, pencil, speed square
– Level
– Sanding block or sander
– Brush and/or small foam roller
Handy but not essential:
– Router (for rounding edges)
– Brad nailer (for attaching strips)
– Miter box (for cutting angles)
Step-by-Step Plan: Build a Radiator Cover in 8 Steps
Step 1: Measure the Radiator and Make a Drawing
Measure the width, height and depth of your radiator. Add the allowances (see table above). Draw the cover to scale and note all dimensions. Pay attention to the position of the thermostat and pipes.
Step 2: Cut All Parts to Size
Cut list standard cover (36x30x7 in / 90x75x18 cm):
| Part | Quantity | Dimensions | Material |
|---|---|---|---|
| Top | 1 | 36 x 7 in | MDF 3/4 in |
| Sides | 2 | 29.25 x 7 in (height minus board thickness) | MDF 3/4 in |
| Front (grille) | 1 | 34.5 x 26 in (width minus 2x MDF thickness) | Perforated MDF |
| Frame strip top (front) | 1 | 34.5 in | 1×3/4 in strip |
| Frame strip bottom (front) | 1 | 34.5 in | 1×3/4 in strip |
| Frame strips side (front) | 2 | 26 in | 1×3/4 in strip |
Tip when cutting MDF: use a fine-tooth blade (at least 48 teeth on a circular saw) and apply painter’s tape along the cut lines on top. This prevents the MDF surface from chipping.
Step 3: Make Cutouts for Pipes and Thermostat
- Measure the exact position of the supply and return pipes.
- Mark the cutouts on the sides or bottom.
- Drill a starter hole and cut the opening with a jigsaw.
- Make the cutout 1/4-3/8 in larger than the pipe — you need clearance when installing.
Step 4: Build the Frame for the Front
The front (the perforated panel) is mounted on a frame of MDF strips.
- Lay out the 4 frame strips as a rectangle: 2 horizontal (top and bottom) and 2 vertical (left and right).
- Glue and screw the corners. Pre-drill in MDF to prevent splitting.
- Attach the perforated MDF panel to the frame with wood glue and small screws or brads.
Step 5: Attach the Sides to the Top
- Place the top flat on a workbench.
- Glue and screw the two side panels to the underside of the top, at right angles.
- Use 3-4 screws per side panel (#6 x 1-1/4 in). Pre-drill.
- Check with a speed square that the corners are 90 degrees.
Result: A U-shape (top + 2 sides) that fits over the radiator.
Step 6: Attach the Front Frame
- Place the U-shape over the radiator to check the position.
- Attach the front frame to the inside of the side panels with corner brackets and screws.
- Leave 2-4 in of open space at the bottom for air circulation.
- Check that everything is square and level.
Step 7: Paint the Cover
This is the time to paint — before you install the cover permanently.
- Sand all surfaces lightly with 120 grit.
- Apply a coat of MDF primer to all visible surfaces. MDF absorbs paint like a sponge — without primer, you’ll use twice as much paint.
- Let the primer dry (2-4 hours, see packaging).
- Light sanding between coats with 180-220 grit.
- Apply 2 coats of acrylic paint with a small foam roller for a smooth result. Let each coat dry 4-6 hours.
Color choice: the most popular color is pure white or bright white to match most baseboards and door trim. Want something bolder? Choose a contrast color that fits your interior.
Step 8: Install the Cover
- Slide the cover over the radiator.
- Check that there is sufficient space around the radiator (at least 1-2 in on all sides).
- Optional: mount to the wall. Screw the cover to the wall with 2-3 screws through the sides or top. Use wall anchors appropriate for your wall type. This prevents the cover from shifting.
- Alternative: freestanding. Many radiator covers sit freely and lean against the wall. Advantage: you can easily remove them for cleaning or radiator maintenance.
Apply radiator foil behind the radiator on the wall (if you haven’t already). This reflects heat into the room and saves 5-10% on your heating bills.
Style Options for the Front
The front determines the look of your cover. There are several options.
Popular Front Options
| Type | Look | Ventilation | Price | Difficulty |
|---|---|---|---|---|
| Perforated MDF panel | Classic, neat | Good (40-50% open) | $15 – $35 | Easy |
| Vertical MDF slats | Modern, sleek | Good | $15 – $30 | Moderate |
| Horizontal slats | Rustic, warm | Good | $10 – $25 | Moderate |
| Woven grille (rattan look) | Bohemian, retro | Good | $20 – $40 | Moderate |
| Cane webbing (Vienna weave) | Scandinavian, trendy | Excellent | $15 – $30 per yard | Moderate |
| Open slats with wide gaps | Industrial, minimalist | Excellent | $10 – $20 | Easy |
Most popular choice: perforated MDF panel in a classic pattern. You can buy these cut to size at hardware stores (Home Depot, Lowe’s). Standard sizes: 24×48 in and 24×96 in. Price: $15 to $35 per panel.
Tips and Common Mistakes
Common Mistakes
- No ventilation on top. This is the biggest mistake. Warm air rises — if the top is closed, the heat stays trapped inside the cover. Leave the top open or use a grille.
- Too little open surface on the front. A panel with small holes (10-20% open) blocks too much heat. Choose a panel with at least 40% open surface area.
- Cover too tight around the radiator. Without 1-2 in of air space around the radiator, heat can’t circulate. Measure generously.
- Not priming MDF before painting. Without primer, MDF absorbs the paint and you get a blotchy, uneven result. Always apply a coat of MDF primer first.
- Forgetting to keep the thermostat accessible. You need to operate the thermostat without removing the cover. Make a cutout or leave an opening.
- Not pre-drilling in MDF. MDF splits if you drive screws without pre-drilling. Always pre-drill with a bit slightly smaller than the screw thread.
- Permanently screwing the cover in place. You need access to the radiator for maintenance, bleeding and repairs. Make the cover removable or use easy-out screws.
Tips
Turn it into a window sill. If the radiator sits below a window, make the top slightly wider (10-12 in deep) so it serves as a window ledge. Practical and attractive.
Combine with a bookshelf. Make the sides wider and add shelves beside the cover. This integrates the radiator into a wall unit or bookcase.
Magnetic closure. Use magnetic catches to make the front panel removable. This lets you access the radiator for maintenance easily, without unscrewing anything.
Frequently Asked Questions
Do you lose a lot of heat with a radiator cover?
It depends on the design. A cover with a perforated front (40%+ open), an open top and an open bottom loses only 5-10% of heat. A solid cover can cost up to 30-40% of heat. Good design is essential.
What is the best material for a radiator cover?
MDF 3/4 in (18 mm) is the most popular and practical choice. It’s cheap, easy to work with and delivers a smooth finish after painting. For the front, use a perforated MDF panel or wooden slat grille.
How much does it cost to build a radiator cover yourself?
A standard radiator cover (36×30 in) costs $50 to $120 in materials if you build it yourself. A comparable ready-made cover costs $80 to $250. Having one custom-built costs $200 to $450.
Do you need to mount a radiator cover to the wall?
You don’t have to, but it helps. A freestanding cover can be easily removed for cleaning. A wall-mounted cover won’t shift and feels more stable. Choose what suits your situation.
Can you build a radiator cover around a designer radiator?
Yes, but it’s less common. Designer radiators (vertical panels, towel radiators) are already aesthetically designed. A cover around a designer radiator mainly makes sense if you want the radiator to blend into a wall unit or wall paneling. Follow the same ventilation rules.
Building Plans and Guides
Ready to get started with professional building plans and step-by-step guides? Check out the complete building plans package at fredsdiyplans.com — with thousands of plans for every DIY project.
Schema markup (for developer):
– Article schema
– HowTo schema (8 steps)
– FAQPage schema (5 questions)
Internal links to add:
– → how-to-build-a-cabinet (existing article)
Word count: ~2,650 words