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100mm URSA 35 Cavity Wall Insulation Batts (pack of 6)

100mm URSA 35 Cavity Wall Insulation Batts (pack of 6)
100mm URSA 35 Cavity Wall Insulation Batts (pack of 6)
100mm URSA 35 Cavity Wall Insulation Batts (pack of 6)
100mm URSA 35 Cavity Wall Insulation Batts (pack of 6)
100mm URSA 35 Cavity Wall Insulation Batts (pack of 6)
  • Non-combustible Class A1 Cavity Batt
  • Full or Partial Fill Masonry Cavity Walls
  • Semi rigid glass mineral wool cavity slab
  • Certified thermal conductivity of 0.035W/mK
  • BBA Certificate 09/4624 ǀ Density of 22 kg/m3
Estimated delivery:
In Stock
£ 66.56
Ex VAT: £ 55.47
  • Brand: URSA®
  • Model: 100mm URSA TERRA 35
  • Dimensions: 1,350mm x 455mm x 100mm
  • SKU: 100mm URSA 35
  • Product code: P1-2323
  • MPN: 100mm URSA CAVITY BATT 35

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100mm URSA 35 Cavity Wall Batt is an A1 non-combustible semi rigid glasswool cavity insulation slab with certified thermal conductivity of 0.035W/mK and nominal density of 22kg/m3, used in full fill or partial fill external masonry cavity walls.

URSA 35 Cavity Wall Insulation Batt 100mm x 455mm x 1350mm is an easy to install water repellent cavity wall batt designed for use between standard vertical wall tie spacings in buildings up to 25meters in height.

Cavity Wall Batts 35 are fire rated if used within a masonry cavity wall constructed in accordance with the Building Regulations and BBA Certificate 09/4624 for new buildings of a domestic and non-domestic nature.

URSA Cavity Batts have minimal resistance to the passage of water vapour thus allowing the wall to breathe - value for the moisture vapour resistivity is 5 MNs/gm.

When correctly installed, URSA mineral wool cavity slabs are maintenance free and have an indefinite life at least equal to that of the building.

Batts are manufactured to BS EN 13162, BS EN ISO 9001 and BS EN ISO 14001 achieving BRE Green Guide Rating A+ (Environmental ranking).

URSA TERRA 35 Cavity Wall Insulation Slabs are available in a range of thicknesses: 75mm, 100mm and 125mm.




Thickness: 100mm

Width: 455mm

Length: 1350mm

Finish: Unfaced

Batts per pack: 6

Slab Coverage: 0.614m2

Pack Coverage: 3.69m2

R-Value: 2.85m2K/W

Thermal Conductivity: 0.035 W/mK

Vapour Resistivity: 5.00MNs/g.m.

Surface Spread of Flame: Class 1 

Building Regulations: Class ‘O’ 

Fire performance: Euro-class A1 (non-combustible)

Nominal Density: 22 kg/m3

Heat Capacity: 1.03 kJ/kgK


Key points:

 · Thermal Conductivity of 0.035W/mK.

 · Fire Performance - Classified as A1 Non-Combustible - the highest possible rating.

 · BRE Green Guide Rating of A+ (Environmental).

 · Easy To Fit - Simple installation between standard wall tie spacings.

 · Zero Ozone Depletion Potential and Zero Global Warming Potential.

 · BBA approved Certificate no. 09/4624.

 · CFC and HCFC Free Product.

 · Meets the NHBC Standards (National House Building Council).

 · Manufactured to BS EN 13162, CE Marked.

 · Certified to ISO 9001 and ISO 14001


Health and Safety:

 · URSA mineral wool products are inherently safe to handle.

 · During cutting or handling any dust generated is of nuisance value only; the wearing of dust masks, gloves and long sleeved clothing is recommended. 

 · Large scale machining should be connected to a dust extraction system. 


Certification and Standards:

 · BBA Agrément Certificate No. 09/4624.

 · Building Regulations and supporting documents.

 · NHBC Standards (National House Building Council).

 · CIBSE Guide A3 – Thermal Properties of Buildings and Components.

 · BS EN 845 Specification for Ancillary Components for Masonry. 

 · BS 5250 Management of Moisture in Buildings – Code of Practice.

 · BS EN 13914 Design, Preparation and Application of External Rendering and Internal Plastering.

 · BS EN 1996, Eurocode 6; Design of Masonry Structures.

 · BS 8000 Workmanship on Building Sites. 

 · Part 3 Code of Practice for Masonry.

 · BRE Digests, Information Papers and Good Building Guides.


*Further information may be found in our Downloads section.

Fairly easy access to all PDF files.

Datasheet ǀ Declaration of Performance - DoP ǀ BBA Certificate ǀ Installation Guide ǀ Certificates ǀ Brochure ǀ SPEC Sheet

Board covarage 3.69 m2
Density 22 kg/m3
Length 1350mm
Material Glass mineral wool
Pack Coverage 3.69m2
Profile High Performance Cavity Batts
R-Value 2.85m2K/W
Thermal Conductivity 0.035 W/mK
Thickness 100mm
Width 455mm
Vapour Resistivity 5.00MNs/g.m.
Slab Coverage 0.614m2
Batts per pack 6 slabs
BRE Green Guide Rating A+ rating
Building Regulations Class ‘0’ 
Coverage 3.69m2
Fire performance Euroclass A1 (non-combustible)
Finish Unfaced
Applications Full or Partial Fill Masonry Walls
BBA Certified Yes (no.09/4624)
Features Non-combustible water-repellent cavity batt
Manufacturer URSA TERRA®

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Where can I use 35 Ursa Cavity Wall Batts?
It is suitable for use in both fully and partially filled masonry cavity walls up to 25m high.


What thicknesses 35 Ursa Cavity Wall Batts come up with?
URSA TERRA 35 Cavity Wall Insulation Slabs are available in a range of thicknesses: 75mm, 100mm and 150mm.


Is 35 Ursa Cavity Wall Batt BBA Certified?
Yes, Cavity Wall Batts 35 are certified with BBA Certificate 09/4624 for new buildings of a domestic and non-domestic nature.


What is the size of 35 Ursa Cavity Wall Batt?
URSA 35 Cavity Slab is manufactured in 1200mm x 455mm size with a certified thermal conductivity of 0.035W/mK


How good is 35 Ursa Cavity Wall Batt?
URSA Cavity Batt is a premium cavity wall insulation. This semi rigid glass mineral wool slab is treated with silicon based water repellent additive.


How 35 Ursa Cavity Wall Batt is delivered?
The slabs are delivered to site in polythene-wrapped packs. Each pack contains a label with the manufacturer’s name, slab dimensions and the BBA logo incorporating the number of this Certificate.


Are they any restrictions in height for 35 Ursa Cavity wall batt?
The product is for use in new and existing domestic and non-domestic buildings, without height restriction for partial fill (additional requirements apply above 12 m) and up to 25 m for full fill. 




We deliver insulation materials to Mainland UK only. Deliveries to Highlands, Northern Ireland, Isle of Wight etc.. might be possible at additional cost.
We offer free delivery on most of the orders above £300 (excluding VAT) (except special products - shipping cost via courier - products marked ''Request A Quote'')

Delivery of some insulation materials might be extended due to the current situation (Covid-19, stock shortages, allocations).
If you need materials quickly please contact us - we will do our best to help you source materials needed.

We do not deliver on weekends and bank holidays. Sometimes we can deliver on Saturdays - please check with us before placing the order.
If you need any further information please contact us tel. 02081910776

We can help to calculate price per m2 or linear meter (one meter in length) cost, please just contact us via phone 02081910776, email or live chat. Alternatively, you can work it out yourself quickly and easily: to get cost per meter square please divide price shown in orange area by ''Required area (m2)'' Example price of £28.80 divided by board coverage 2.88m2 = cost of £10.00 per m2.


No matter whether you choose a local installer or a national company, there’s a few tips to help you find the right installer for your home insulation improvements, such as asking for recommendations and making sure that they’re part of a certification scheme. This makes sure that they have the right skills and standards of workmanship to carry out the installation, and you can be sure that they know exactly what they are doing.


1. Thermal inspection picture in portfolio

It’s worth seeing a installer’s previous work. There’s no harm asking if you can see any properties nearby that they’ve installed insulation in. Best way would be to see Infrared Thermal Imaging Inspections. Thermal cameras spot small, but key changes in temperature in different areas of a house, identifying problematic areas that the human eye never could and some that a visual inspection could only hypothesize.

2. Reviews

Along with checking recommendations and previous work, finding reviews online can often be a great way to find out if they provide a good service or not. However, it’s best not to solely rely on reviews you may find or review websites, as there’s no controlling who writes them.

3. Compare prices

Comparing prices will also ensure companies can’t take advantage of you and give you a fair price. 

4. Word of Mouth

The best way to find a great insulation installer is through recommendations. Make sure you ask friends and family. They will most likely give you their honest opinion and can tell you from first hand experience.


Whether you require a wall, cladding, external wall, loft or floor insulation fitted, you can find and hire your local insulation installers from popular UK web pages. A simple internet search will return thousands of potential installers near your area.



We are the stockist of construction materials and related products for both trade and DIY from most recognizable brands in the UK like Cordek, RCM, Promat, Rockwool, Isover, Celotex, Xtratherm, Ursa, Low-E, Cedral, Kingspan, Dufaylite, British Gypsum, K-rend, Ecotherm, Iko enertherm, Kay-Metzeler, Terrawool to allow you to complete your insulation job on time at competitive prices and the highest standards.


Whether you are a large company or a DIYer, if you need a large amount of insulation materials, we can offer quantity discounts at the best prices. Please contact us and our friendly customer service will try to find the best and cheapest solutions for you. We value your time and we will try to deliver the products as soon as possible at a reasonable price to your construction site or house. The UK's leading insulation supplier near you and your needs. Price List available upon request.
100mm URSA 35 Cavity Wall Insulation Batts (pack of 6)
100mm URSA 35 Cavity Wall Insulation Batts (pack of 6)
£ 66.56