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FREE UK MAINLAND DELIVERY ON ALL UPVC BUILDING PRODUCTS - DELIVERY WITHIN 24-48HRS
FREE UK MAINLAND DELIVERY ON ALL UPVC BUILDING PRODUCTS - DELIVERY WITHIN 24-48HRS
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Low-maintenance
Sustainably sourced
10 Years Manufacturer Guarantee

Explore our internal window boards range

Internal Window Boards


  • Original price £0.66 - Original price £0.66
    Original price
    £0.66
    £0.66 - £0.66
    Current price £0.66

    Short Laminated Window Board End Caps - Pair

    Trade Superstore Online

    Product description: Short Laminated Window Board End Caps - Pair  Length: 102mm x 37mm x 51mm Quick, easy installations High quality finish Easy ...

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    Original price £0.66 - Original price £0.66
    Original price
    £0.66
    £0.66 - £0.66
    Current price £0.66
  • Original price £15.09 - Original price £30.49
    Original price
    £15.09 - £30.49
    £15.09 - £30.49
    Current price £15.09

    225mm UPVC Internal window Cill

    Trade Superstore Online

    Product description Internal Window Cill Size: 225mm Length: 5m Only Easy use Choice of sizes Variety of colours Colour-coded to match other lines...

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    Original price £15.09 - Original price £30.49
    Original price
    £15.09 - £30.49
    £15.09 - £30.49
    Current price £15.09
  • laminated end cap size
    laminated end caps for cill cover
    Original price £0.88 - Original price £4.62
    Original price
    £0.88 - £4.62
    £0.88 - £4.62
    Current price £0.88

    Laminated End Cap

    Trade Superstore Online

    Product description: Laminated End Cap Size: 300mm x 25mm Double ended Quick, easy installations Various colours available High quality finish Lo...

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    Original price £0.88 - Original price £4.62
    Original price
    £0.88 - £4.62
    £0.88 - £4.62
    Current price £0.88
  • Original price £17.29 - Original price £32.99
    Original price
    £17.29 - £32.99
    £17.29 - £32.99
    Current price £17.29

    250mm UPVC Internal window Cill

    Trade Superstore Online

    Product description   Internal Window Cill Size: 250mm Length: 5m Only Easy use Choice of sizes Variety of colours Colour-coded to match other lin...

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    Original price £17.29 - Original price £32.99
    Original price
    £17.29 - £32.99
    £17.29 - £32.99
    Current price £17.29
  • repair cracked window cill
    cill repair
    Original price £59.95 - Original price £147.95
    Original price
    £59.95 - £147.95
    £59.95 - £147.95
    Current price £59.95

    3.7m Cill Cover Repair

    Trade Superstore Online

    Product description  Cill Cover Repair Pack of 5 Length: 3.7m  Depth: 175mm Recycled UPVC Easy installations Choice of colours Seriously low mai...

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    Original price £59.95 - Original price £147.95
    Original price
    £59.95 - £147.95
    £59.95 - £147.95
    Current price £59.95
  • Original price £13.99 - Original price £28.09
    Original price
    £13.99 - £28.09
    £13.99 - £28.09
    Current price £13.99

    200mm UPVC Internal Window Cill

    Trade Superstore Online

    Product description   Internal Window Cill Size: 200mm Length: 5m Only Easy use Choice of sizes Variety of colours Colour-coded to match other lin...

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    Original price £13.99 - Original price £28.09
    Original price
    £13.99 - £28.09
    £13.99 - £28.09
    Current price £13.99
  • Original price £23.79 - Original price £23.79
    Original price
    £23.79
    £23.79 - £23.79
    Current price £23.79

    300mm White UPVC Internal Window Cill

    Trade Superstore Online

    Product description Internal Window Cill Size: 300mm Length: 5m Only Easy use Choice of sizes Variety of colours Colour-coded to match other lines...

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    Original price £23.79 - Original price £23.79
    Original price
    £23.79
    £23.79 - £23.79
    Current price £23.79
  • Original price £12.59 - Original price £25.69
    Original price
    £12.59 - £25.69
    £12.59 - £25.69
    Current price £12.59

    175mm UPVC Internal Window Cill

    Trade Superstore Online

    Product description   Internal Window Cill Size: 175mm Length: 5m Only Easy use Choice of sizes Variety of colours Colour-coded to match other lin...

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    Original price £12.59 - Original price £25.69
    Original price
    £12.59 - £25.69
    £12.59 - £25.69
    Current price £12.59
  • Original price £11.59 - Original price £24.39
    Original price
    £11.59 - £24.39
    £11.59 - £24.39
    Current price £11.59

    150mm UPVC Internal Window Cill

    Trade Superstore Online

    Product description   Internal Window Cill Size: 150mm Length: 5m Only Easy use Choice of sizes Variety of colours Colour-coded to match other lin...

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    Original price £11.59 - Original price £24.39
    Original price
    £11.59 - £24.39
    £11.59 - £24.39
    Current price £11.59
  • window cill
    23mm Laminated Window Board
    Original price £44.00 - Original price £321.20
    Original price
    £44.00 - £321.20
    £44.00 - £321.20
    Current price £44.00

    23mm Laminated Window Board

    Trade Superstore Online

    Product description: Laminated Window Board Thickness: 23mm Quick, easy installations Various colours available Various sizes High quality finish ...

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    Original price £44.00 - Original price £321.20
    Original price
    £44.00 - £321.20
    £44.00 - £321.20
    Current price £44.00
  • Original price £6.49 - Original price £6.71
    Original price
    £6.49 - £6.71
    £6.49 - £6.71
    Current price £6.49

    Long Laminated Window Board End Caps - Pair

    Trade Superstore Online

    Product description: Long Laminated Window Board End Caps - Pair  Size: 102mm x 37mm x 51mm Quick, easy installations High quality finish Easy de...

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    Original price £6.49 - Original price £6.71
    Original price
    £6.49 - £6.71
    £6.49 - £6.71
    Current price £6.49
  • windowcill
    internalwindowcill600
    Original price £98.60 - Original price £98.60
    Original price
    £98.60
    £98.60 - £98.60
    Current price £98.60

    600mm Window Board 3m

    Trade Superstore Online

    Product description Internal Window Board Depth: 600mm Length: 3m   Trade Superstore Online are proud to offer you our designer range of Internal...

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    Original price £98.60 - Original price £98.60
    Original price
    £98.60
    £98.60 - £98.60
    Current price £98.60
  • internal window cill sizing
    internal universal window cill trims
    Original price £1.32 - Original price £9.57
    Original price
    £1.32 - £9.57
    £1.32 - £9.57
    Current price £1.32

    Laminated Universal Trim

    Trade Superstore Online

    Product description: Laminated Universal Trim Size: 422mm x 27mm Quick, easy installations Various colours available High quality finish Long life...

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    Original price £1.32 - Original price £9.57
    Original price
    £1.32 - £9.57
    £1.32 - £9.57
    Current price £1.32
  • Original price £73.70 - Original price £84.70
    Original price
    £73.70
    £73.70 - £84.70
    Current price £73.70

    250mm Internal Window Board

    Trade Superstore Online

    Product description Internal Window Board Depth: 250mm Length: 4.1m Various colours  Various sizes   Trade Superstore Online are proud to offer ...

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    Original price £73.70 - Original price £84.70
    Original price
    £73.70
    £73.70 - £84.70
    Current price £73.70
  • Original price £68.20 - Original price £84.70
    Original price
    £68.20 - £84.70
    £68.20 - £84.70
    Current price £68.20

    225mm Internal Window Board

    Trade Superstore Online

    Product description Internal Window Board Depth: 225mm Length: 4.1m   Trade Superstore Online are proud to offer you our designer range of Inter...

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    Original price £68.20 - Original price £84.70
    Original price
    £68.20 - £84.70
    £68.20 - £84.70
    Current price £68.20
  • White Bullnose Window Board End Cap
    Original price £2.65 - Original price £2.65
    Original price
    £2.65
    £2.65 - £2.65
    Current price £2.65

    White Bullnose Window Board End Cap 40mm (300mm length)

    Trade Superstore Online

    Transform your window board into a flawless work of art with our White Bullnose Window Board End Cap. This expertly crafted end cap is designed to ...

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    Original price £2.65 - Original price £2.65
    Original price
    £2.65
    £2.65 - £2.65
    Current price £2.65
  • internal windowsills
    Original price £50.60 - Original price £50.60
    Original price
    £50.60
    £50.60 - £50.60
    Current price £50.60

    White 180mm Laminated Window Board

    Trade Superstore Online

    Product description: White Laminated Window Board Size - 23mm Length: 5m Quick, easy installations Various colours available Various sizes High qu...

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    Original price £50.60 - Original price £50.60
    Original price
    £50.60
    £50.60 - £50.60
    Current price £50.60
  • Original price £95.00 - Original price £95.00
    Original price
    £95.00
    £95.00 - £95.00
    Current price £95.00

    300mm Window Board 4.1m

    Trade Superstore Online

    Product description Internal Window Board Depth: 300mm Length: 4.1m Various colours  Various sizes   Trade Superstore Online are proud to offer y...

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    Original price £95.00 - Original price £95.00
    Original price
    £95.00
    £95.00 - £95.00
    Current price £95.00
  • Original price £45.10 - Original price £64.90
    Original price
    £45.10 - £64.90
    £45.10 - £64.90
    Current price £45.10

    200mm Internal Window Board

    Trade Superstore Online

    Product description Internal Window Board Depth: 180mm Length: 4.1m   Trade Superstore Online are proud to offer you our designer range of Inter...

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    Original price £45.10 - Original price £64.90
    Original price
    £45.10 - £64.90
    £45.10 - £64.90
    Current price £45.10
  • White Bullnose Window Board
    Original price £28.45 - Original price £77.40
    Original price
    £28.45 - £77.40
    £28.45 - £77.40
    Current price £28.45

    White Bullnose Window Board (5m length)

    Trade Superstore Online

    Elevate the aesthetics of your living space with Trade Superstore Online’s White Bullnose Window Sill. Crafted to perfection, this bullnose window ...

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    Original price £28.45 - Original price £77.40
    Original price
    £28.45 - £77.40
    £28.45 - £77.40
    Current price £28.45
  • Original price £44.00 - Original price £44.00
    Original price
    £44.00
    £44.00 - £44.00
    Current price £44.00

    White 150mm Laminated Window Board

    Trade Superstore Online

    Product description: White Laminated Window Board Size: 23mm Length: 5m Quick, easy installations Various colours available Various sizes High qu...

    View full details
    Original price £44.00 - Original price £44.00
    Original price
    £44.00
    £44.00 - £44.00
    Current price £44.00
  • Original price £210.00 - Original price £210.00
    Original price
    £210.00
    £210.00 - £210.00
    Current price £210.00

    900mm Internal Window Board (4.1m)

    Trade Superstore Online

    Product description Internal Window Board Depth: 900mm Length: 4.1m   Trade Superstore Online are proud to offer you our designer range of Inter...

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    Original price £210.00 - Original price £210.00
    Original price
    £210.00
    £210.00 - £210.00
    Current price £210.00
  • Original price £181.00 - Original price £181.00
    Original price
    £181.00
    £181.00 - £181.00
    Current price £181.00

    900mm Internal Window Board (3m)

    Trade Superstore Online

    Product description Internal Window Board Depth: 900mm Length: 3m   Trade Superstore Online are proud to offer you our designer range of Internal...

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    Original price £181.00 - Original price £181.00
    Original price
    £181.00
    £181.00 - £181.00
    Current price £181.00
  • Rosewood Bullnose Window Board End Cap
    Original price £6.50 - Original price £6.50
    Original price
    £6.50
    £6.50 - £6.50
    Current price £6.50

    Rosewood Bullnose Window Board End Cap 40mm (300mm length)

    Trade Superstore Online

    Transform your window board into a flawless work of art with our Rosewood Bullnose Window Board End Cap. This expertly crafted end cap is designed ...

    View full details
    Original price £6.50 - Original price £6.50
    Original price
    £6.50
    £6.50 - £6.50
    Current price £6.50

Interior inspiration

Shop the look

Window boards are
internal UPVC window 'cills'. These are beautifully finished round-edged
boards that will give any room a contemporary feel. And to finish off
we have the perfect end caps too, in matching colours.

Explore the range

You might also need...

Welcome to Trade Superstore Online, your one-stop destination for high-quality interior products that combine great looks with convenience

We understand that homeowners in the UK value both style and practicality when it comes to enhancing their living spaces

Our superb range of internal products has become a popular choice among discerning customers

Discover our collection, featuring a variety of innovative solutions designed to elevate your interiors effortlessly

Say goodbye to the hassle of painting and maintenance with our easy-fit UPVC skirting boards

Ideal for wet areas such as bathrooms and kitchens, our internal cladding provides an attractive and practical solution

Give your windows a polished and refined look with our internal window boards

Complete your interior transformation with our luxurious vinyl flooring options

Our range is carefully curated to cater to the diverse needs and preferences of homeowners across the UK

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About our internal window boards

Welcome to our extensive collection of high-quality internal window boards and cills! Whether you're looking for standard UPVC window cills or laminated  window boards, we have a wide range of options to suit your needs. Our selection features a variety of colours, including white, cream, rosewood, golden oak, light oak, and anthracite grey, allowing you to find the perfect match for your interior design.

Our internal window boards are crafted with precision and durability in mind. Made from premium materials, they offer excellent resistance to moisture, warping, and wear, ensuring long-lasting performance. The standard UPVC window cills provide a sleek and modern look while offering easy maintenance and exceptional strength. These are beautifully finished round-edged boards that will give any room a contemporary feel. And to finish off we have the perfect end caps too, in matching colours.

For those seeking a more decorative touch, our laminated MDF window boards are an ideal choice. With their laminated surface, they boast an attractive appearance that replicates the natural grain and texture of wood. These boards are not only aesthetically pleasing but also resistant to scratching, chipping, and fading, providing a beautiful and functional addition to your windows.

At Trade Superstore Online, we understand the importance of finding the right window boards and cills that blend seamlessly with your interior style. That's why our collection encompasses a wide range of colours, allowing you to create a cohesive look that enhances the overall aesthetics of your space. Whether you prefer a classic white or cream tone, a warm and inviting rosewood or golden oak, a contemporary light oak, or a stylish anthracite grey, we have the perfect options for you.

Browse through our comprehensive selection of internal window boards and cills today and elevate your home with the perfect finishing touch. With our top-notch quality, diverse color choices, and commitment to customer satisfaction, we are confident that you'll find the ideal window boards to meet your requirements.

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