SKU: 88780499187

Knauf Dritherm Cavity Slab 37 125mm x 1200mm x 455mm

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Description

Knauf Dritherm Cavity Slab 37 125mm 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
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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]
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SKU: 88780499187

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4.5 ★★★★★
Based on 7 reviews
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Product Reviews
Verified Purchase
6532
Draper, US
★★★★★ 5
Great printer...I thought
Style: WF-4820, Set: 1. SINGLE TRAY (250 sheets)/FAX/ADF/PRINT/COPY/SCAN
This unit has really great reviews and many from small biz owners who say it works great and lasts. I've had it for a month and I'm really happy with it. It's much better than my last one. If it lasts as so many other reviews say, it's a great purchase. **UPDATE** Loved this printer. Only used it a few times. On the 3rd month, I pushed the button to turn on the printer and there was no response at all. I tried everything. Checked all connections and the outlets. It would not turn on at all. I was out of the return window with Amazon, so I called Epson. They told me they are sending a unit to me and to return mine with the box and label in the shipment. But they said they are NOT SENDING A NEW UNIT, BUT A REFURBISHED UNIT! I am not at all happy about this! I purchased a new printer, not a refurbished printer, and I want a new one! So, I'm really unhappy with Epson right now.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 6, 2025
H
Verified Purchase
Hamid Ahmad
West Palm Beach, US
★★★★★ 1
Not a good choice.
Style: WF-4820, Set: 1. SINGLE TRAY (250 sheets)/FAX/ADF/PRINT/COPY/SCAN
I recently purchased this printer with high hopes of a reliable and efficient printing solution. Unfortunately, my experience with this printer has been nothing short of a nightmare. Connectivity Woes: The most glaring issue is its abysmal Wi-Fi connectivity. Despite being placed right next to the router, the printer consistently displays a "Poor Wi-Fi Connection" message. This is in stark contrast to all other devices in my home, which work seamlessly with the Wi-Fi network. Even my old laser printer, which is placed close to the same location, functions without any connectivity hiccups. It's baffling how a modern printer can struggle so much to maintain a stable Wi-Fi connection. Scanning Nightmares: The scanning functionality of this printer is equally disappointing. The user interface is far from user-friendly, making it a daunting task to set up scanning to email or computer directly from the printer. This is a basic feature that should be intuitive and hassle-free, but instead, it's a convoluted process that requires unnecessary effort and time. Ineffective Customer Service: I reached out to customer service in hopes of resolving these issues. While they guided me through a reset process, the solutions they provided were only temporary fixes. The problems resurfaced shortly after, leaving me back at square one. It's frustrating to invest in a product only to find that the customer service solutions are inadequate and short-lived. Comparative Performance: What's more perplexing is that my older laser printer, which is from a different brand, continues to perform flawlessly in terms of connectivity and scanning capabilities. This stark contrast highlights the subpar quality of the Epson. Final Verdict: I'm deeply disappointed with this printer and regret this purchase immensely. Its inability to maintain a stable Wi-Fi connection, along with the cumbersome scanning setup and unsatisfactory customer service experience, make this printer a headache rather than a helpful device. I strongly advise against considering this printer if you value reliable performance and user-friendly features. Save yourself the frustration and explore more dependable options on the market.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 10, 2023
S
Verified Purchase
Scott V
Birmingham, US
★★★★★ 5
Easy set up on USB cable. Works as expected on my Windows 11 computer
Style: WF-4820, Set: 1. SINGLE TRAY (250 sheets)/FAX/ADF/PRINT/COPY/SCAN
I got this Epson All-In-One printer for my work. I had been using HP printers for years. I started having problems with paper handling on them. Things like getting a paper jam error when there was not paper jammed in it. I decided to try an Epson for a change. I have had the printer now for three weeks. So far it has worked great. Easy to set up on my Windws 11 computer. Works great for printing and for scanning. I have it set up by USB cable because I don't have reliable wireless internet in that part of the building. No issues with the USB configuration. Ink usage seems good so far. Ink on any printer is expensive, but that was expected. I would recommend this printer.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 28, 2026
U
Verified Purchase
user x
Dallas, US
★★★★★ 4
Much harder to install than expected - especially if you have a comma in your Wifi password
Style: WF-4820, Set: 1. SINGLE TRAY (250 sheets)/FAX/ADF/PRINT/COPY/SCAN
I found this printer surprisingly hard to install. First, I used the software on the DVD that came with the system. That caused my computer to crash and reboot! After it rebooted, I downloaded the (presumably newer) combo installer from the Epson web site. That ran, but when it came time to connect the printer to the wifi network, I found that there is no way in the Epson network configuration wizard to use a comma in the wifi password. There is a period and many other symbols, but I didn't see a comma. But our system admin used a comma in our wifi password, so I couldn't connect the printer to the wireless network. I had to dig up a LAN cable and plug the printer into a network switch, restart the installation and configure the printer for a LAN connection. That seemed to work, at least according to the installer, but when I tried to print a test page there was a print connection failure. After running the "Epson Printer Connection Checker", it found a printer port error and tried to fix it, but was unable to. So, I removed the printer entirely from the computer using Windows device management and had Windows try to detect the printer. That finally worked, although now the Fax device is missing. But at least now I can print, and the print quality looks good. But I'm still frustrated by the inability to connect to the wifi.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 10, 2023
A
Verified Purchase
Albert
Dallas, US
★★★★★ 5
Great printer
Style: WF-4820, Set: 1. SINGLE TRAY (250 sheets)/FAX/ADF/PRINT/COPY/SCAN
This printer is compatible with my Apple Mi 4 desktop and my Apple Laptop. I didn’t have a dvd player, so I went to the required Epsom website, and downloaded the software. No issues. All of the bells and whistles on the printer works flawless. Follow the directions and enjoy the results .
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 17, 2026

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