Kingspan GreenGuard XPS Insulation Board (0.75m²)

Brand: Kingspan
SKU: KNG-GG300R-30
£11.99 Incl. VAT
£11.99 Incl. VAT (regular price)
Please note: This product has a slightly longer lead time. Our team wiil notify you with an estimated delivery date.

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    Kingspan GreenGuard XPS Insulation Board (0.75m²) is a high-performance, rigid extruded polystyrene (XPS) board designed for demanding insulation applications. With a thermal conductivity of 0.033 W/mK and excellent compressive strength, this board is ideal for use in inverted roofs, basements, car park decks, heavy-duty commercial and industrial flooring and cold stores. Engineered to withstand freeze/thaw cycles and ground moisture, it offers long-lasting performance even under challenging conditions. Its low water absorption makes it particularly suitable for green roof systems and other moisture-prone installations.

    Technical Data

    Product Code GreenGuard GG300
    Board Size 1250mm x 600mm (0.75m²) (Rebated)
    Material Extruded Polystyrene (XPS)
    Thermal Conductivity (λ) 0.033 W/m·K
    Compressive Strength ≥ 300 kPa at 10% deformation
    Reaction to Fire (Euroclass) Euroclass E (EN 13501-1)
    Water Absorption (long-term) < 0.7% by volume
    Water Vapour Resistance > 300 MN·s/g
    Density Approx. 35 kg/m³
    Thickness Range 30mm / 50mm / 60mm
    Edge Profile Rebated
    Service Temperature Limit -50°C to +75°C
    Freeze/Thaw Resistance Excellent
    Moisture Resistance High (resistant to ground moisture)
    Applications Inverted roofs, basements, car parks, heavy-duty flooring, green roofs

     

    For external wall insulation works, EWI Pro strongly recommends obtaining a full EWI Pro system specification, particularly where warranties or compliance are required.

    Individual products purchased without an EWI Pro system design do not constitute a warranted EWI system.

    Insulation products may be used independently for repairs, maintenance, flooring, or other non-EWI applications.

    Frequently Asked Questions

    Kingspan GreenGuard GG300 is ideal for specialist uses such as inverted roofs, basements, car park decks, heavy-duty flooring in commercial or industrial settings, and cold store floors. It’s also compatible with green roof systems.

    Yes, it has minimal water absorption and excellent resistance to ground moisture penetration, making it suitable for below-ground and damp environments.

    The thermal conductivity is 0.033 W/m·K, providing effective insulation performance for a range of applications.

    Yes, Kingspan GreenGuard GG300 is lightweight and easy to cut with a hand saw or hot wire cutter, making it simple to handle and install on site.

    Yes, Kingspan GreenGuard GG300 is lightweight and easy to cut with a hand saw or hot wire cutter, making it simple to handle and install on site.

    Reviews & Ratings

    Overall rating

    4.6
    24 reviews
    5 stars
    19
    4 stars
    3
    3 stars
    0
    2 stars
    1
    1 stars
    1

    Have something to say?

    Rate Kingspan GreenGuard XPS Insulation Board (0.75m²)

    Paul

    5
    11.12.2025
    Tech support was sound. Board is rock solid in the basement water, perfect fit every time. Exceeded specs!

    Zahra

    1
    17.10.2025
    rUBBISH driver. called up, refused to wait 5 mins. terrible joke.

    Jon

    4
    11.10.2025
    Robust strength. Laying these was heavy going.

    Christine

    5
    29.09.2025
    Sorted the wet basement. Those rebates make fitting a doddle.

    Richard

    5
    29.09.2025
    Top spec XPS. Rebates lined up dead on.

    mary

    5
    16.09.2025
    Soretd.

    Trevor

    5
    06.09.2025
    Top kit, spot on. Unbeatable strength for my basement job and cuts dead clean. Cheers, EWI!

    ian

    5
    31.08.2025
    GreenGuard XPS - Top Gear. XPS 300kPa. Sound gear. Value is bang on.

    Dalia

    5
    22.08.2025
    Kingspan XPS is spot on. Dead strong for the basement floor. Rebated edges fiftted mint. Cracking stuff!

    piotr

    5
    08.08.2025
    GreenGuard is rock solid. Rebated edges made jointing fast and saved us loads of filler time. Delivery driver was sound too. Superb quality!

    Joanne

    5
    04.08.2025
    Proper tough XPS for the inverted roof.

    Tom

    4
    05.06.2025
    Proper durable spec for the job, fitted well. Stock was a faff and edges weren't cfrisp, mind.

    Constantin

    5
    01.06.2025
    Used under basement slab, felt properly solid. Handled the loads & damp no drama. Sorted the U-value. Top kit.

    PARHAM

    5
    03.05.2025
    My inspectors were dead chuffed with the compliance paperwork provided. Saved me chsaing documents! Brill product.

    Daniel

    2
    24.03.2025
    boards were proper lumpy and warped, took ages chasing levels for the roof job. Rebates knackered on delivery too.

    Anthony

    5
    04.03.2025
    Great stuff!

    Paige

    5
    01.01.2025
    Solid stuff for the floor load, dead easy to cut. Saves labor time, which is money. Delivery guy was spot on. Sorted.

    jay

    4
    21.11.2024
    Specs met for comp strength and U-values, grand kit. Tracking link was faulty for two days which held up the start. Sorted.

    Hugh

    5
    08.11.2024
    Nailed the U-value. Dense stuff, easy to cut without crumble, and the joints are dead on. Brill!

    Robert

    5
    05.11.2024
    Proper solid for the car deck load, thermal is spot on!

    Steve

    5
    30.09.2024
    Brill boards for the car park deck. Rebated edges fit spot on and it’s strong as.

    diego

    5
    01.09.2024
    Bombproof stuff, easy fit. Kingspan specs were bang on. NBrill!

    Waldemar

    5
    09.08.2024
    Proper gear, well sorted.

    simion

    5
    09.08.2024
    U-value on the roof was spot on. Cracking insulation, the rebate saves huge labour hours. Fitted easy as you like. Proper job done.

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