SKU: 75183277811

Knauf Dritherm Cavity Slab 37 150mm x 1200mm x 455mm

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Description

Knauf Dritherm Cavity Slab 37 150mm x 1200mm x 455mmDriTherm Cavity Slabs are semi rigid or rigid slabs of non combustible, water repellent, glass mineral wool. They are 455mm wide to suit standard vertical wall tie spacings, ensuring a closed joint with adjacent slabs. Performance THERMAL DriTherm Cavity Slabs have thermal conductivities ranging from 0. 032 to 0. 037 W mK. FIRE DriTherm Cavity Slabs are classified as Euroclass A1 to BS EN 13501 1. Benefits British Board of Agrment approved for use in

DriTherm Cavity Slabs are semi-rigid or rigid slabs of non-combustible, water repellent, glass mineral wool. They are 455mm wide to suit standard vertical wall tie spacings, ensuring a closed joint with adjacent slabs.

Performance

THERMAL

DriTherm Cavity Slabs have thermal conductivities ranging from 0.032 to 0.037 W/mK.

FIRE

DriTherm Cavity Slabs are classified as Euroclass A1 to BS EN 13501-1.

Benefits

    • British Board of Agrément approved for use in all exposure zones
    • Excellent thermal and fire performance
    • Water repellent
    • Slabs ‘knit’ together, thus eliminating air gaps between adjacent slabs



Application

DriTherm Cavity Slabs are for the thermal insulation of masonry cavity external walls and are installed to fully fill the cavity. They are approved for use in buildings up to 12m high in any exposure zone and for use in multi-storey applications up to 25m in height

Environmental

DriTherm Cavity Slabs represent no known threat to the environment and have zero Ozone Depletion Potential and zero Global Warming Potential.

Knauf Insulation mineral wool products with ECOSE Technology benefit from a revolutionary, bio-based, formaldehyde-free binder technology, based on rapidly renewable materials, instead of petro-based chemicals. It reduces embodied energy and delivers superior environmental sustainability.

The technology has been developed for Knauf Insulation’s glass and rock mineral wool products, enhancing their environmental credentials without affecting the thermal, acoustic or fire performance. Insulation products made with ECOSE Technology contain no dye or artificial colours – the colour is completely natural.

Additional

Standards

DriTherm Cavity Slabs are manufactured in accordance with BS EN 13162, EN 16001 Energy Management Systems, OHSAS 18001 Occupational Health and Safety Management Systems, ISO 14001 Environmental Management Systems, and ISO 9001 Quality Management Systems, as certified by Bureau Veritas.

Durability

DriTherm Cavity Slabs are odourless, rot proof, non-hygroscopic, do not sustain vermin and will not encourage the growth of fungi, mould or bacteria.

Moisture resistance

Tests by the British Board of Agrément confirm that DriTherm Cavity Slabs will not transmit water to the inner leaf. Nor will they transmit moisture by capillary action across the cavity or from below damp proof course level.

Vapour resistivity

DriTherm Cavity Slabs offer negligible resistance to the passage of water vapour and have a water vapour resistivity of 5.00MNs/g.m.

Guarantee

DriTherm Cavity Slabs are guaranteed* for 50 years to resist the transmission of liquid water from the outer masonry leaf to the inner masonry leaf in new cavity walls and to have a thermal conductivity of 0.032 to 0.037 W/mK at normal building temperatures

*Available by application to Knauf Insulation Ltd

Certification

DriTherm Cavity Slabs are certified by British Board of Agrément Certificate 95/3212. Approval can be sought from Knauf Insulation Ltd and the British Board of Agrément for DriTherm Cavity Slab’s use in buildings over 25m high.

Handling and storage

DriTherm Cavity Slabs are easy to handle and install, being lightweight and easily cut to size, where necessary. They are supplied in polythene packs which are designed for short term protection only. For longer term protection on site, the product should either be stored indoors, or under cover and off the ground. DriTherm Cavity Slabs should not be left permanently exposed to the elements.

    • Thermal conductivity (W/mK): 0.035
    • Thermal resistance (m2K/W): 1.40
    • Length (mm): 1200
    • Width (mm): 455
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 75183277811

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4.4 ★★★★★
Based on 26 reviews
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E
Ellie Jensen Lowry
Chelsea, US
★★★★★ 5
Great spring or summer fit
This came a little bigger than anticipated, but other than that, this is a great quality set. It's a little lighter, which is great for spring or summer. The color is just as pictured and I'm impressed with the altogether fit.
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Reviewed in the United States on May 7, 2026
F
Verified Purchase
Fergus Maurice
Waukegan, US
★★★★★ 1
Bad quality
Poor quality no liners
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 15, 2026
G
Gladstone
Cuba, US
★★★★★ 5
Excellent 5-Piece Suit for Graduation; Great Fit & Generous Pant Length
Color: Navy, Size: 16, Color: Navy, Size: 16
Sizing Profile & Custom Hemming: I took a bit of a gamble ordering this, as my son is just transitioning out of a size 16 and into a size 18. I ordered the 18, and everything fit him absolutely perfectly! A great detail for parents to be aware of is that the pants run generously long. This is fantastic if you have a taller child, and because it is a proper suit, it gives you the extra fabric needed to hem the bottoms for that exact, custom-tailored fit. The Tie Options (Hardware Details): This 5-piece set comes with both a bowtie and a standard faux necktie. The hardware on these is distinctly different, which is a helpful detail for buyers: the bowtie is a true clip-on style, while the standard necktie utilizes an elastic/rubber band that stretches around the shirt collar (it is not a clip-on). Both options look incredibly sharp and work very well depending on the look you want. Comfort & Breathability: My son wore this entire outfit for his graduation ceremony, and the material performed beautifully. Despite wearing a full suit, he did not overheat at all. The fabric breathes surprisingly well for formal wear, keeping him completely comfortable. Final Verdict: Overall, this is a wonderful outfit with absolutely zero complaints from either of us. It fits great, offers versatile neckwear options, and is comfortable enough for long, formal events. 5 out of 5 stars! Pros: • Perfect Transition Fit: The size 18 fits exactly as expected for a growing teen. • Generous Pant Length: Provides plenty of extra fabric to properly hem for taller kids. • Breathable Fabric: Kept my son cool and comfortable throughout his entire graduation ceremony. • Versatile Accessories: Includes both a clip-on bowtie and an elastic-band necktie. Cons: • None; it is a fantastic, highly functional formal set.
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Reviewed in the United States on April 26, 2026
V
Verified Customer
Omaha, US
★★★★★ 5
Sharp Looking Suit That Fits Well and Doesn’t Feel Overly Formal
Color: Light Grey, Size: 10
I ordered this set for a more formal occasion, and it ended up being a really nice balance between looking dressed up and still being comfortable. The first thing that stood out is how good it looks overall. The style is clean and modern without feeling stiff or overly formal. It gives that polished look you want for events, but it doesn’t feel like a traditional heavy suit. The fabric is lighter than I expected, which is actually a plus. It makes it much more comfortable to wear, especially for kids who don’t want to be stuck in something hot or restrictive. It still looks structured, but it’s easier to move around in. The fit was solid right out of the package. The jacket lays nicely and doesn’t bunch or pull in awkward spots, and the pants fit well without needing much adjustment. It looks tailored without actually being tailored, which is ideal. The full set is a nice bonus. Having everything coordinated, including the shirt and accessories, makes it easy to get a complete look without having to piece things together separately. Details are well done. The buttons, stitching, and overall construction feel decent for the price point. It doesn’t come across as cheap, which can sometimes be the case with kids’ suits. It’s also held up well so far. No issues after wearing, and it still looks good without wrinkles taking over right away. If I had one small note, it’s that you may still want to double check sizing depending on your child’s build, especially for length in the pants or sleeves. Overall, this is a great option for formal events. It looks sharp, fits well, and is comfortable enough that it won’t be a battle to get them to wear it. Definitely a solid value for a full set.
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Reviewed in the United States on April 13, 2026
J
Job
San Leandro, US
★★★★★ 4
Overall, a really solid choice
Color: Light Blue, Size: 6
This suit is a great option for a summer wedding or any formal event! The linen fabric keeps it lightweight and comfortable, which is perfect for kids, and the overall look is really sharp and stylish. The double-breasted jacket adds a nice elevated touch, and the full 5-piece set makes it easy to have a complete outfit without extra shopping. Everything fit well and looked great for the occasion. My only small complaint is the tie, it’s fine, but I do wish it was a bit nicer to match the quality of the rest of the suit. Overall, a really solid choice that looks adorable dressed up, with just a minor detail that could be improved.
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Reviewed in the United States on April 23, 2026

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