Product FAQs Installation FAQs Purchase and Delivery FAQs Installation FAQs How do I install SureCav? See the instructions on the ‘Products’ tab, for each product Do you supply wall ties and wall tie clips with system? No. The SureCav System comprises SureCav25 and SureCav50 panels and the joining strips (and seal washers for timber-frame). It is the customer’s responsibility to supply ancillary items and ensure that best building practice is maintained. What fixings should be used with external timber framed walls? SureCav Limited only supply the seal washers, not the fixing screws or wall-ties. To comply with Local Authority Planning Departments and NHBC Standards (6.2: External timber Framed Walls) M10 wall ties and their fixings should be of austenitic stainless steel, comply with the BS EN 845 and be capable of accommodating anticipated differential movement. Does the cavity need to be ventilated? Appropriate ventilation for the cavity must be provided by air bricks or perp/weep vents, providing a minimum of 1500mm2 per linear metre, venting at DPC and lintels as normal and high level if required – see BBA certificate section 9:2. Ensure a corresponding slot, matching the vent aperture, is cut in the SureCav panel to allow full ventilation. What insulation type is recommended with use with SureCav? SureCav must be installed against a robust surface, so ideally, a board PIR insulation is best suited. SureCav25 will allow an extra 25mm insulation in a designed 100mm cavity, helping to achieve a possible U-Value with 75mm insulation to 0.18W/m2K. SureCav25 helps to minimise the overall wall thickness with deeper insualtion, whilst still ensuring a 25mm residual cavity. Is SureCav compatible with Rockwool partial-fill cavity insulation? Rockwool can be used as a suitable partial-fill cavity insulation material as long as the type of rockwool used has a robust surface. It is especially important that the surface of the insulation does not compromise the moisture protection groove on the SureCav pod. There are several products available that would be acceptable, e.g. dual density stone wool products that have a high-density outer layer and a lower-density sub-layer. Can I use SureCav with SIPs panels? Yes, SureCav still provides the best means of forming a cavity, an essential element in construction. The external leaf of stone, flint, brick or slate can then be completed with ease. Structural Insulated Panels (SIPs) offer a modern, cost-effective, environmental and energy efficient solution to building construction. A SIPs building is constructed by assembling pre-manufactured panels which are heavily insulated, often eliminating the need for additional insulation. The panels are very strong and used in external and internal walls. The ties are fixed to the outer face of the SIP panel with a stainless steel screw. The SureCav panels are fixed, as with timber frame, by a stainless steel screw and seal washer through the pods (recommended 5 per panel) see seal washers above. Install a row of SureCav, and along the top of each row, fix the frame ties at the specified centres. There are no studs in the SIPs so the tie can be fixed as needed. Trim the long joining strips at the tie and continue with the off-cut the other side. For more information about SIPS panels and full SIPS building systems, see www.supersips.uk.com Would the SureCav cavity system be suitable for use with an ICF (Insulated Concrete Former) construction such as Nudura? SureCav25 and SureCav50 have both been successfully used on ICF structures. The SureCav panels will provide a suitable drainage membrane, designed to keep the residual cavity it forms completely mortar and moisture-free, with the pods in the sheets preventing any moisture from crossing the cavity. Wall-ties are screwed into the special vertical sections of the ICF wall and fit between the SureCav panels each 450mm vertically, at the local designers specified centres. Can SureCav be used with flint construction? SureCav has been specified on many flint projects and was also featured on Grand Designs (Newbury Christmas Cottage 2013). The flint being placed directly against the SureCav sheets, with the SureCav acting as an effective backing board, protecting the cavity from moisture and mortar. Additional support for the flint can be achieved by fitting frame ties, with the SureCav seal washers through the pods, or helical ties where needed through the flat face of the SureCav panel only. Also, stainless steel EML can be set in the bed for support, cable tied to the wall ties. Will SureCav support a natural rubble rag (limestone) stone 125-150mm thick outer leaf? SureCav was designed for this scenario, with standard ties at 450mm vertical SureCav board intervals. Additional frame ties can be fixed through any of the pods using the SureCav seal washers. For additional support, drill a pilot hole into the block inner leaf and fix a helical tie through any flat surface of the SureCav panel only, not through the pods. Does the stonework have to be coursed, or can it be used with rubble stone walling as well? Standard ties are installed each SureCav board coarse, 450mm vertically as normal. For random/rubble stone or flint, fix additional ties for extra support through the pods with the seal washers as required. Helical ties can be fixed through any flat surface of the SureCav sheet (not through the pods) Can SureCav be used with raked joints? Raked and semi-dry coursework are acceptable and often used. Some local authorities insist on a minimum 100mm mortar bed, but is down to the structural engineer/designer to confirm with the authority. Are there any implications to using SureCav in a radon area and is it compatible with barriers by Visqueen etc? If SureCav is required for stonework below DPC then trim the SureCav to the tray or Radon barrier and then continue with the SureCav above, ensuring the Radon barrier is kept intact. Ensure proper ventilation to the cavity, as per BBA cert. (see BBA certificate) which requires 1500mm2 per linear metre run, achieved by air bricks/perp vents at low level, lintels and high level if needed. Purchase and delivery FAQs Where do I purchase SureCav? 1. Directly from this website here 2. Through our stockists here 3. Through any other builder’s merchant. Availability? SureCav can be delivered to site within 24/72 hours in England, 2-5 working days in Scotland. For other destinations please contact us. Will I save money by using SureCav? By choosing SureCav25 you could be saving the difference of £41.08 per square metre, compared to using a block support wall. Also, don’t forget that the time saved using SureCav results in a faster build, estimated to be 10 working days on an average four bedroom house How should I store SureCav? SureCav should be stored out of direct sunlight. Protecting SureCav from the exposure to harsh sunlight if the SureCav is fixed to a timber-frame building ahead of the masons: If the SureCav is likely to be exposed to direct sunlight for a prolonged time, then protect it with a temporary cover such as hessian cloth. Product FAQs What is the SureCav Cavity Wall Spacer? The SureCav Cavity Wall Spacer System is a black, injection moulded, 100% recycled polypropylene sheet, with raised spacer protrusions at 260 mm centres. The SureCav panels are either 25mm or 50mm deep. Measurements of each sheet: Length: 1200mm Width: 450mm Depth: 50mm (SureCav50) or 25mm (SureCav25) Sheet thickness: 2mm How are the sheets joined together? The sheets interlock with plastic, H-section profile joining strips at all edges. Corners are formed by folding the sheet along the bend line built into each sheet. The correct number of joiners required are included in the cost and shipped with each pack of SureCav. Always place the SureCav raised pod against the insulation board or breather membrane of a timber-frame building and build agaist the flat face of the sheet. Horizontal joining strip for trimming between the wall ties. Length: 900mm Vertical joining strip (cut to the correct length) Length: 400mm There are 12no. of each length of joining strips in a pack of 10 SureCav panels. How many joiners do I need? On ordering, we need to know the number of sheets of SureCav you require (calculate by dividing the number of square metres of wall area by 0.54). Sufficient horizontal and vertical joiners will be sent with the order and are included in the price of the sheets. Please note: The 900mm joining strips are to be used for the horizontal joints. Cut a long joining strip up to a wall tie and use the off-cut to start the next section (or cut a notch in the joiner and slot it over the tie). The 400mm joining strips are designed to exactly fit the vertical joints of the SureCav panel. Will I need seal washers, and if so, how many? Washers are recommended for fixing the SureCav panels to timber frame buildings. The whole SureCav System can thus be fixed to the frame ahead of the masons, adding extra protection to the timber frame. We would suggest 5 washers per panel, one in each corner pod and one in the centre. They can be purchased in bags of 50. How many sheets to a pallet? SureCav is shipped in packs of 10 or 5 sheets. One pallet will contain 200 sheets (20 packs) of SureCav25 or 200 sheets (20 packs) of SureCav50. Are there any other products on the market that do the same job as SureCav? SureCav is approved by the British Board of Agrément (BBA certification No. 04/4154). It’s the only product that carries BBA certification that can successfully replace concrete backing blocks or shuttering and still maintain a moisture and mortar free cavity. Our unique patented system forms a 25 or 50mm cavity, saving time and money. SureCav25 is the only product available that allows a permitted 25mm residual cavity, approved by BBA & LABC. Will SureCav protect against wind-driven rain? By building with the SureCav panels instead of a using a block leaf you are providing a barrier to protect from wind driven rain. The “wall” of plastic, formed by the SureCav panels not only provides an excellent surface for the construction of the stone wall but shields the cavity and inner leaf from water ingress. Is SureCav environmentally friendly? SureCav is 100% recycled polypropylene. Instead of ending up as landfill or incineration material, SureCav is manufactured by injection moulding process to produce a building material that shows we care for the environment. SureCav comes out on top in reducing the Embodied CO2(ECO2) footprint in new buildings as well as being 100 times lighter than concrete blocks, making site management and movement of materials much easier. Testimonials I am so impressed with this product I would be happy for you to bring any of your prospective customers to my site at Wool, Dorset, and I will be pleased to show them your system. Chris Allworthy, Barratt Homes Site Agent We have just built a new build using SureCav25 and found it superb to use, allowing us to increase insulation thicknesses within the build, enabling us to achieved a great EPC (energy performance) result. We also found it very easy to use as it guaranteed a clear cavity throughout the build and it also saved us using a backing block for the stone façade, actually increasing the internal rooms sizes by at least 200mm. Overall, we found the SureCav a fantastic system – thanks SureCav! Tony Iles, Director, Tonic Construction Limited Having used SureCav on at least 6 contracts we will never use backing blocks or shutter boards again. Richard, EMM-LEC Ltd I really can’t recommend the SureCav product enough! Our self build project has been stressful to say the least with the rising costs of labour and materials, we’ve had to do whatever we can to save where we can. I thought a good way to do this would be installing the SureCav myself, however with never using the product before I was unsure of how straight forward this would be. I am happy to say it was an absolute breeze! The stonefacing looks great against it and the stone lads said it gave them a great flat structure to work against. This really is a 10/10 A*** product that we couldn’t be happier with and recommend enough. Andy Holcroft, self-builder in Cumbria Love this product, my local building control officer recommended it for my stone built project. The product was easy to install and made the building of the stone walls quick and easy. I’m now using it on all projects. Nice to see a product that does what it says! Glen Davison One of the best products in the construction industry! Dan, Greenhill Construction SW Ltd The speed of build, easy storage and handling make SureCav an ideal system. We have found this especially to be the case where storage and working space on site is at a premium. Ray Holmes, Hopkins Developments We have supplied the SureCav system for several years to bricklayers across the Southwest. Not only do we find the team at SureCav highly knowledgeable and helpful, but the SureCav system gets great reviews from all our customers who install it. Customers who use SureCav will continue to use it on future projects as it is a quick, easy and professional system to instal. The service is second to none and I really can’t find a fault. Suitable for both timber frame and masonry, it really is a fantastic system. Eric Sutherland, Branch manager SureCav is a fantastic product and as we said in the CPD it has very much become a standard detail for stonework within the office. Perhaps now with knowledge of the further advantages of waterproofing and stability it may become more widely specified for other cavity wall types also. Many thanks for all your help and we hope that our support of your product will continue to push SureCav as a recognised standard for cavity wall construction within the industry. Louisa Meek, CSA architects My opinion is that SureCav is the way forward and is a great product and great solution. I can see this completely doing away with outdated backing block design. I have been personally really impressed with the overall SureCav system and have happily shown some of your prospective customers around. I talked to your prospective customers about the many benefits of SureCav, including it being simple and easy to erect and also, with the advantage on a tight site it taking up less valuable storage space and can be moved and handled with ease. The biggest advantage, of course, is that you can increase the overall floor area by using SureCav. Daniel Cox, Site Agent We have used SureCav on a new stone house which was shortlisted for an RIBA Award. SureCav is a very good way, without the need for all of the additional foundations, and loss of floor space in the building associated with a blockwork backing to the external masonry. This saves time, space and money plus it gives the additional layer of weather protection provided by the SureCav sheets. We are currently using SureCav. We are very pleased with the high quality stonework. SureCav makes it easier to achieve the effect we want. Phil Easton, Founding Director at Western Design Architects SureCav is a fantastic product and would use it on all jobs. Ross Parkyn, Director, Duchy Brickworks I have specified Surecav on building regulations applications after the product had been recommended to me by the Local Authority Building Inspector and was interested to try it on my own extension. I found the product to be perfect for creating a random limestone facade which abuts the traditional rubble filled construction seamlessly yet overcomes the inherent problems of water ingress through the limestone fissures. Additionally, the reduction in depth of wall gives space for appropriate levels of insulation whilst achieving maximum internal space. I will continue to specify the product as the benefits far outweigh the costs and it is a breeze to install. Jonathan Athay, JMA Design, North Yorkshire If you haven’t used SureCav yet, look this product up – it’s the future! JR Masonry Related Resources View all related documents Instructional videos Installation Videos A series of tutorials explaining how to install SureCav Read more SureCav Brochure All PDF Drawings BBA Certificate Brochure Certifications Design Handbook Instruction Sheets .pdf BBA Certificate All PDF Drawings BBA Certificate Certifications .pdf Installation Instruction Sheet All PDF Drawings Block and Render Brick Flint ICF Instruction Sheets SFS Stone Timber/SIP Frame Traditional .pdf SureCav Pocket Guide All PDF Drawings Brochure Design Handbook Installation Guides Instruction Sheets .pdf Ventilation Requirements All PDF Drawings BBA Certificate Cavity Ventilation Certifications Ventilation Requirement .pdf SureCav25 Profile Drawings (DWG) All DWG Drawings .zip SureCav50 Profile Drawings (DWG) All DWG Drawings .zip SureCav Ventilation Requirements All PDF Drawings BBA Certificate Cavity Ventilation Certifications Ventilation Requirement .pdf Additional wall ties at openings Additional ties at reveal All PDF Drawings Stone .pdf Surecav Product Range SureCav 50 The 50mm cavity spacer system. Creates a guaranteed clear, dry, moisture and mortar free BBA approved 50mm residual cavityPanel size: 1200mm x 450mm x 50mm £150.00 ex VAT Add to cart SureCav 25 The 25mm cavity spacer system. Creates a guaranteed clear, dry, moisture and mortar free BBA approved, 25mm residual cavity Panel size: 1200mm x 450mm x 25mm £150.00 ex VAT Add to cart Washers Washers are used when installing SureCav on timber/SIP frame buildings to create a watertight seal. 5 per panel recommendedSize: 6mm diameter hole x 10mm deep £11.00 ex VAT Add to cart Type-W Vent Achieves 1500mm2 per linear meter BBA ventilation requirement, when installed every 0.5m high and low with these ventsSize: 105/115mm x 65 x 10mm £24.00 ex VAT Add to cart Type-W Vent Extender Duct The extension ducts are used with the Type W vents. The Extenders are required with an outer leaf over 100mm deep.Size: 200/225 x 65 x 10mm £49.00 ex VAT Add to cart Talk to an expert about using SureCav for your next project Call us now on 01963 34660 8am – 5pm (Mon-Fri), or fill in the contact form, to find out how SureCav benefits your build or ask us a question! Join the SureCav Revolution Become a SureCav Stockist Fully Accredited by BBA Contact Us Now Find out how SureCav benefits your project, or ask us a question below.. I have read the Privacy Policy and am happy with how my data will be used. This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.