Primer paint is required as an undercoat before applying the upper layers to any surface. In the presence of water these swell and block the capillaries and pores in the applied sand / cement renders, screeds and mortar to provide an effective barrier against the transmission of liquid water with a proven track record for over 100 years. Wet room Kits consists of a mix of products which are needed when creating an open plan showering area. For a clear coating over bricks to allow. Adheres to damp masonry and is weather-resistant. 6/5. 2 apply a suitable rendering adhesive (Powerwall make one but so do others it is like a polymer based tile adhesive) 3 bed a fibre glass mesh in the adhesive and trowel flat. Home Forums > Screwfix Community Forum > Builders' Talk > Waterproofing. Its faced brickwork which has been painted, plan is to bead it, mesh it ist coat 4:1 with waterproofer 2nd coar 5:1 no waterproofer. Is it okay to press on with the inside works (batten out, 25mm celotex and 12mm plasterboard) before the rendering is complete? The renderer is proposing to do a scratch coat and then a top coat with waterproofer mixed in, and then it will be painted with something like Dulux Weathershield. yesterday morning i put on a scratch coat, with rendering sane and castle cement ( ordinary portland cement it say in the bags) i used a 5-1 mix and i mad sure but using buckets, normally i would cut a bag in. The product can also be used to protect retaining wall structures. 40 per KG. Is there anything I can do now. Corrosion-Resistant. (£1. 4m²/Ltr. Prop the hose up splashing against the wall and go and have a cup of tea. Soudal Repair Express Plaster Filler White 250ml (125RG) (4) compare. Free next day delivery available. Apple Pay accepted in store. Add for Delivery. Buy online & collect in hundreds of stores in as little as 1 minute! 30 day money back guarantee. Sealing porous areas and extending coverage with paint sealer will ensure a longer lasting coat. I intend on having the front of the wall rendered so it is important that it is sealed correctly. One Coat Renders is a high quality, pre-blended render mix, for single coat application on solid substrates such as brickwork, blockwork and concrete, in moderate exposure conditions. Order online at Screwfix. This would be better off in plastering forum. Volume. Some wall primers create barriers to stop. 54/L quantity Collection Set Store. Recycled Polypropylene Construction. 30 day money back guarantee. Sika Waterproof Coating Grey 5kg. Hi, I have an 1910 solid brick, no cavity built house that is all pebble dashed. 30 day money back guarantee. The 2nd. £3. Normally you put on a scratch coat of 4 sand to 1 cement ( plastering sand ) with feb, 2nd coat, float coat 5 sand to 1 cement, feb plus water. Use on Plasterwork, Skirting Boards, Windows & Door Frames. Use it after clearing. He ended up really busy so we decided i'd. Removable Grid Supplied. Wire brush the exposed walls to be sure that there is no mould on the. The wall has a cavity with no insulation and about 150mm above the damp course. I've slapped a PVA solution to brickwork on internal walls prior to render, I GUESS that this situation is no different. However on the upside the materials that are available mean that working with sand and cement with added lime and waterproofer (for the record) and the ability to ashlar, and form all manner of quoins and window reveals/bands etc take far more skill than the average. Suitable Application. There is a white crystal deposit under left on the exposed render. Mixing: Add the SBR undiluted to the mix and then adjust the consistency with clean water. Strong fibreglass mesh tape that helps reinforce plaster coating and protects it from cracking. 5mm² Cables. don't pva the wall either first coat with waterproofer in and second coat with waterproofer in also. Good luck. If the wall is dry (unlikely this year!) lightly damp it without soaking it completely before applying the. Thistle One Coat Plaster 7. Been a plasterer /damproofer for 28 years and yes you can use SBR and Paint over it but will need to give a sand or LIGHT. Ideal for Use in Basements/Cellars but may also be Used as an External Coating for Concrete, Brick, Block & Bonded Renders. And all this after the walls were skimmed and painted. Render, Bricklaying and Floor Screeds. Jesus some ridiculous answers. This Everbuild 402 Water Seal is a sealant that stops water wear on brickwork, stone masonry, concrete, pebbledash and other exterior walls. Only way to test if it's still wet is with a moisture meter. Need some professional advice on waterproofing my 3ft garden flowerbed retaining wall. com. i have a freshly scoured brick wall, having recently removed half an inch of old powdery paint layers. Use on brick, concrete and stone. Suitable Application. com. Not if you’re using lime, paint a waterproofer on after Watch the weather, spray bottle at the ready keep it damp, and don’t curse when the scratch coat cracks Abrickie , May 21, 2020Plumbcrazy New Member. The rest of the garage walls are rendered and painted and I would like to know if I can render over the blocks. SBR modified render will probebly be good enough soverine chemicals also do a product called K11 I think never used it but told by one who had it worked a treat,Otherwise, admixes can give some increased protection against water ingress for external render, or try a cement based render for the inside bay, which should keep water at bay moreso than plaster. Sets in 20 minutes. £12. . 2) Fit a bellcast. Im nervous about it cracking so please can you confirm the correct mix to use. Covers approx. I have asked a local builder to re-read our chimney as it was badly cracked and had started to let water into the loft. In 20 years of building and renovating, it has never been mentioned in our business. Went on white. common sense tells you that this system will go nowhere and it wont. 250 cement board. com. Using a small grinder, cut out all loose chunks of render - & open all sketchy cracks. It failed in one area, and cracked off the wall. Buy 3 for £11 - View Offer. 49Inc Vat. Home Forums > Screwfix Community Forum > Builders' Talk > Is Artex Render Waterproof? Discussion in 'Builders' Talk' started by DIYDave22, Nov 8, 2023 at 5:34 PM. Delivery. • High water and rain resistance • Water reducing • Provides long term water protection• Chloride free New Sika sku available (code 98821)Long term water protection to mortar, concrete and rendering. Add for Delivery. IKOpro Synthaprufe Trade is easy to apply and provides damp proofing for concrete floors, foundations and masonry walls below, at or above ground level. Water vapour permeable. Then enjoy! I’ve done an extension and due to the nature of the land, now the door of the extension will be about 50cm above the grass of the garden. Go all over it and knock off the loose stuff. £ 14. Building a stud wall with a damp-proof membrane and insulating it. Product code. Click & Collect. The wall has a cavity with no insulation and about 150mm above the damp course. Charlie Far!ey New Member. A friend has given me some acrylic render (premixed tubs 25kg) which is a topcoat, and more than enough to do the job. 99 Inc Vat Click & Collect Not available for delivery Buy Bonding Agents at Screwfix. You should have. Latest Offers At Screwfix. By doing it this way you have. Chemical dpc's are used as a cost cutter and are not really as good as people make you believe. The render on the outside should waterproof the wall anyway. Insulates and protects wiring. Create a smooth base. Extremely durable and will adhere to any substrate for filling and repairs with no depth limit. £30. Discussion in ' Builders' Talk ' started by roger waters, Sep 11, 2006 . Exterior decorators acrylic for sealing around exterior window and door frames in most building substrates. If you don`t want waterproofer at least use a plasticiser or lime. As per usual there are so many different videos etc on the web it can get confusing. We would like to show you a description here but the site won’t allow us. External wall is rendered. Render question. Weberend One-Coat Base Render (OCR) is a versatile pre-blended single coat application render, ideal for rendering brickwork, blockwork and concrete. Thanks. This full-bodied, solvent-based paint dries quickly to form an odourless and taint-free black film – it’s suitable for metal protection as well as overcoating wood and felt. Most can be used on all common surfaces, and as a decorative trim or door paint. Extra grip, render bonding agent that contains a fine aggregate to provide an improved mechanical key before applying render on external concrete, blockwork or brick. Is there anything I can do now. com. General Purpose Mortar. Often soft in texture, when applied these substances harden. 2: Hydrophobic Coatings. the render has retarder/waterproofer in it. dougalhouse Member. I've heard bad things about Sika, re: not being suitable for moxing in a cement mixer: online at Screwfix. Waterproofs Plaster, Plasterboard, Plywood, Render & Concrete. qwas123 Screwfix Select. Walls are old super dense concrete blocks. Can anyone give me advice on rendering over Medium Density Blocks for an external garage. Delivery. Ask a question. Search Activating the button will move focus to the expanded search input fieldContains primer, coating and waterproof jointing tape. As it dries then rough up the surface to match the surrounding render. It has many uses, and is suitable for most porous. VAT £15. For External Use. Apply your floating coat (finish) and use a bit of 2X1 vertically to rule off with and form the curve, any slacks (indents) fill them with more render then rule again, will be awkward to plastic float so finish off with a rung out sponge lightly over for best result, dont forget the waterproofer in the finish mortar mix. Dow 791 Weatherproof Silicone Sealant Anthracite 310ml (44836) (42) compare. )As long as you have good key you could get away with one coat say 10 mm thick. PermaSEAL 3 Damp Proof Membrane Kit 10m². Daveukleics Member. Light grey colour when dry. Water Seal. £18. Suitable for Water, Oils & Chemicals. Sets in 20 minutes. 5/1 sand & cement if the house is that old i would add a waterproofer too. Click & Collect. Ideal for emergency repairs, filling and patching. Ideal for emergency repairs, filling and patching. Morning all, I'm looking to render 3 garden walls, all made from 7. Fillers and Putty are used to fill or seal holes, cracks, or gaps prior to further decorating. Product code. Most external decorative renders are painted, most have a combined waterproofer and plasticiser addidive in last coat. This sealant is suitable for for repelling water on porous surfaces. Done a good job apart from i didn't put waterproofer in. , Apr 8, 2005 #2. but the property is in a really exposed position in the Penninnes, built of sandstone, it is grade 2 listed, and the mortar it is pointed with. A. Stormdry Masonry Protection Cream is a colorless waterproofing cream for application to brick, stone, mortar, render and masonry. Don't try and apply render in one coat it will only sag and probably fall off wall. It seems a lot of dampness for such a small amount of cracking but I suppose this is the best place to start to reduce the. Adheres to damp masonry and is weather-resistant. 1. I'm quite a confident diy'er and wanting to try rendering a garden wall for the first time. Apply a bitumen or Pitch Epoxy coating from the outer edge of your 'slope' all over the existing dpc and up the wall 150mm. Extra grip, render bonding agent that contains a fine aggregate to provide an improved mechanical key before applying render on external concrete, blockwork or brick. Hi Guys. Presume you have slope away, try to start with nothing at dampcourse (should remain below dampcourse). It’s great for waterproofing outside areas that are liable to be damp, humid or continuously exposed to water or steam. KIAB Super Member. DIY_Has123 Active Member. Screwfix Community Forum. . Render is max 10-15mm thick. £26. Initially it was agreed that the old render would be removed and a new render put on the bricks. 99 Inc Vat. We encourage you to debate the topics and issues of the day in a friendly manner, whether related to trade/DIY or not. 25 Inc Vat. Single application waterproofing compound for emergency repair and general maintenance of most roof types. No waterproofer in render scratch coat. Ideal for emergency repairs, filling and patching. Light Grey. Suitable for 2. This has now altered a little and it will often look like a kind of crazy paving which I belive are cracks in the dash which is allowing water into. K Rend). RECOMMENDATIONS:Alchemy Plastering. Volume. Hi handy 007 1/2. Features include multi-pockets, adjustable designs and reflective tape so that you can be seen. I don't see why not to both questions. Rendering of chimney. 1 remove lose stuff. 1/5. Buy. After application by brush, roller or spray; Stormdry provides breathable protection against rain penetration on exterior weather-facing walls. 2. com. Screwfix customers rate this product 4. 5°C. FInish with horizontal scratches for a key. £34. The Bonding coat should not be allowed to dry before application of the render or plaster. G4 Pond Sealer is a moisture cured polyurethane which forms a non-porous seal on concrete rendered ponds, G4 pond sealer uses the moisture in the air and the render to harden, G4 pond sealer can be applied to slightly damp surfaces, but it is important that the render is sufficiently dry to be porous so as to enable the first coat of G4 pond sealer to bond and obtain a. cautious New Member. good heavy scratch will help to reduce the suction, dont leave the floating coat after the scratch too long, very important that you reduce the suction or your scratch will turn to dust when it dries out too fast. 8/5. Order Bostik General Purpose Mortar Grey 5kg at Screwfix. Click & Collect. Been in exact same position 20 years ago, building control wasn't happy with the so called waterproof render on a small extension, I had to run a disc cutter along the line of the damp coarse and fill it with mastic. I guess the best way to render the bell bead is in two parts. He rendered approx two square mtres at a time before applying dash. £9. 310 ml. 5 kg. 5/ plaster to suit. General purpose, solvent-based. Just. Waterproof. Never heard of the 4 weeks / mould thing before. Using 4 :1 first coat and 6:1 second with waterproofer. Choose this handy pre-mixed sand and cement render from Weber to cover brickwork, blockwork, concrete and other suitable surfaces. apply the sand and cement to above 1/4 inch of the existing. Choose from rapid or fast set cement for small commercial or domestic jobs. Screwfix Community Forum. Screwfix Community Forum. Order online at Screwfix. As well as offering protection, exterior wall paint improves the appearance of a property by brightening it up and bringing it back to life. I want to chop off about 500mm from the wall to widen the path and then render the cut end to match the wall - so a small area to render, approx 900mm high by 2 brick widths. oh! and ladies. KA Tanking Slurry is the complete crystalline solution to waterproofing masonry and blockwork. Will this be enough. I have a small area (2. but the render is now well past its sell by date & is dropping off in lumps. when i removed the old wood it crumbled so i pulled it all off. Applying the board directly onto the membrane with thin adhesive and mushroom fixings. final coat of render needs to. You could remove all the damp affected render and plaster back to stone and then render with a 4:1 mix of sand and NH lime. £13. Long-lasting immediate fix. For Interior & Exterior Use. It incorporates a Polymer bonding aid allowing the results. ** Edit ** just ordered the Screwfix stuff as the reviews looked really good and now I've got the say-so from Vinn that it'll work then that'll do for me!Order online at Screwfix. Click & Collect. 99 Inc Vat. One idea was maybe to do a slurry of waterproofer and render and paint in on with a brush and once that becomes tacky, to add the 1st coat / scratch coat? Not sure what product to use though for waterproofing purpose, pls advise! Cheers. Contains enough to waterproof a standard sized shower. Over 40,000 products. Sandtex masonary paint is top notch, waterproof and flexible so as long as its put onto a good base (hence the Satabliser solution first), it would do the job and look great. Thermalite hedge their bets somewhat on their finishes section. Hi, I wonder if anyone can help/ offer some advice as we’re at our wits end. High performance waterproof treatment for exterior porous surfaces. View all: Sika Waterproof Sealants. Home Tags > rendering. £21. Hazardous Product – Not available for Mail Order/ TCND outside of Mainland UK. FREE next day delivery available,. If you really want belt and braces, then seal it with a clear sealer, then you won't have to paint it every few years. A nightmare rendering on smooth lightweight blocks, hate it. Fill holes and cracks with ease, suitable for many applications. com. Then simply follow the manufacturer's painting guidelines perfectly. alrite mate, if the blocks bricks are sound(no cracks in joints or the bricks)you should wet down the surface(not to much)then scratch coat using a waterproofer and plasticiser,either when this has took up enough or the next day apply second coat again using plasticiser and you should be ok!(plasticiser helps retain air in the mix and. £2. Right have got to render the side of a concrete pad and would like to mix a rapid hardener and frost-proofer additive together with a waterproofer additive to use in the mix. Contact the team today by calling 0161 509 9009 or emailing info@emperorpaint. £ 52. Evening guys. Discussion in 'Builders' Talk' started by Victor Lek, May 24, 2022. Scrape off as much as you can and let it dry-out naturally, which could take a long time, before attempting to redecorate. 2nd coat (floating coat) 4:1 sharp sand with waterproofer as above etc. Now I am intending to use cement, sika waterproofer and sharp sand and render this wall. Offers long term durability with no gusting wind noise. I have used a slurry coat first of. . Pay your way. These so called hydrophobic coatings come in a range of different types, and offer all of the qualities that are needed to prevent the issues mentioned above. ex. Contains 1,2-benzisothiazol-3 (2H)-one and reaction mass of 5-chloro-2-methyl-2Hisothiazol-3-one and 2-methyl-2H-isothiazol-3-one (3:1). Silicone render and waterproofing for penetrating damp. Product Type. Don't listen to jim he doesn't know that hes talking about you always 2 coat all render, bricks also. Order Fabsil Universal Protector Water-Repellent Spray 400ml at Screwfix. £ 28. Low Odour & Solvented. Ideal for emergency repairs, filling and patching. com. Should you wish to brighten up these surfaces then use the Weathershield masonry paint system (old render may require a coat of stabilising solution first). Bostik Roof Repair Compound Black 1kg (57518) Bostik Roof Repair Compound Black 1kg. I would then like to render it. The front apex has often shown signs of water ingress as the mortar lines underneath are often visible after heavy rain. #2. blertsville, Jul 4, 2011. 5. Float at 5:1:1 Builders sand : OPC : LIME with waterproofer in the water How does that sound? 2. Its a painted concrete block wall, about 60m by 2m. Expect someone to come along with more modern alternatives. This time, its butting up against 12mm plasterboard (painted) which was dabbed directly to the brick (no render). Render mix. Thread by: Crooky, Jul 4, 2021, 2 replies, in forum: Builders' Talk. VAT. it is a little tired in. The render on your house has cracked due to a number of reasons, it could of been done in poor weather, or not enough mechanical key. Screwfix Community Forum. Inc. I understand that the waterproofer will do what it says on the tin, but only if in the first coat and then covered by another coat of render. Extra grip, render bonding agent that contains a fine aggregate to provide an improved mechanical key before applying render on external. e. It’s in such bad shape that you can push your finger quite easily into it and it comes away like wet sand. 1 waterproof additive put into the mix, only other option to guarantee know more damp is th hack off internal plaster work, apply vandex over all exposed brickwork, sand cememnr then plaster, damp will be gone for ever. Easy returns, with 30 day money back guarantee. Corrosion-Resistant. £13. FREE Click & Collect within 30 minutes. Febtank Super is a high performance tanking slurry for masonry and concrete. Use a mixer and measure quatities using a bucket for consistency. 1:20 rather than the more dilute 1:40 option. Includes 2 Countersunk Screw Holes for Workbench Fixing. It is only about 2 months old is it possible I can have a a company in to lay k-rend straight onto the render?The plas will work its way into the mix and soften down the mix as it turns. Scud the wall first with 1:1 sand/cement next day dampen down before rendering with the hose, thermalite are a pig to render unless you are quick. use feb rendamix with your render (also sold by screwfix) this helps waterproof the render you can render down to the ground but I would advise a gap between 1/2 to 1" with a flare at the bottom to push any rain away from the brick the gap. Scratch coat is 1 part cement, 1 hydrated lime, 5 plastering sand, with fibreglass mesh embedded. Waterproofing Block Building. 1. This process is best carried out using a pumping system and water fed pole with a brush attachment. Choose from top trade brands. Need to paint render which was applied about 4 years ago apparently with waterproofing element included. Light Grey. Mix approximately 4 to 5 litres of water per 25kg bag using an electrically driven mixer until you achieve a workable consistency. He ended up really busy so we decided i'd. For the coloured top finish you require you use coloured sand and not coloured cement. Buy Cement Mix at Screwfix. £32. I’ve done an extension and due to the nature of the land, now the door of the extension will be about 50cm above the grass of the garden. Home Forums > Screwfix Community Forum > Builders. Easy to shape and can be used on a variety of rough masonry surfaces including cement, concrete, breeze blocks, bricks and stones. I know I need to attach mesh to the surface, but a friend has told. Currently in Stock. Home Forums > Screwfix Community Forum > Other Trades Talk > waterproofing internal rendering Discussion in ' Other Trades Talk ' started by woodburner , May 16, 2006 . slapiton New Member. Buy Fixings & Fastenings at Screwfix. Odourless & Solvent-Free. Unibond PVA is renowned for being the only BBA accredited PVA in the UK, and we stock Unibond super PVA with a high bond strength for gluing ceramic tiles, carpets, plaster and much more. Hi, My extension was built and rendered using a sand/cement render around 4 years ago. Waterproofs Plaster, Plasterboard,. Is vital that the waterproofer is added in the correct amounts according the the manufactures instructions. £11. He uses plastering sand and cement mixed at a 3:1 ratio with waterproofer added, no lime or plastisiser. Hi Guys. White sand can be bought in15kg bags and gauged with snow cem white cement and hydrated lime for a perfectly white finish, but even so in time this will discolour and fade and will. £13. This coat should be applied while the first coat is still. 99 Inc Vat. ie. The PVA glue can be dilated up to 5:1 with water for maximum use. Tarmac One Coat Renders can be applied with a trowel of float. The old injection attempt has not worked, and neither has the inside attempt to render to 1m ht. Cold & Heat-Resistant. • Apply in temperatures from +5°C to +25°C. 2017 #2. However as an temporary repair would it be OK to remove the loose render, apply unibond and then use Waterproof cement from Evo-stik - idea being this sets in 20 mins. Considering that you nickpuff seem to be the only person that is unable to decipher plain English I will help you out a little. the waterproofer will not work!!!!!the top coat must be at least 6 parts WASHED sharp sand 1 part lime 1 part cement {opc}. Home Forums > Screwfix Community Forum > Builders' Talk > Help with Rendering please Discussion in ' Builders' Talk ' started by mikethesmoke , Apr 26, 2009 . Waterproof. setting manholes and repairing rendering and floor screeds. If you bought the paint you can get a refund on it. Slow setting time makes it ideal for covering large areas in one application. With 10mm for the scratch coat and 8mm for the top coat. • Air entraining plasticiser • Prevents shrinking and cracking during curing • Water reducing • Chloride freeMortar plasticiser for stronger, easier to use brick and block-laying mortar. thanks, I keep reading that you shouldn't use cement render when a wall is built with lime or cob but because it will not breath but it has already been hard rendered on the outside so therefore it is already. you can use it for rendering but it's much more difficult to rub up. What depth should the battons for the scratch coat be? I was looking at 10-15 mm deep off the wall. Order online at Screwfix. KIAB, Sep 18, 2015. Hi, I am going to render round the bottom of the bay windows, would it be a good idea to use integral waterproofer? One of the bays is north facing. gauge everything put the water in the mixer then add the lime to the. Provides a hard wearing, protective layer on wood, metal and cement. Good luck. Discussion in 'Builders' Talk' started by Bungditin. Then sharp sand fine, lime, cement in 6: 1: 1 ratio as top coat. Home Forums > Screwfix Community Forum > Builders' Talk > Rendering. This is the only part on the whole house which shows this and I belive I. 4/immediately the last coat is on and while still wet, blind with sand. (the actual water drainage path, which looks like its made of half a sewer pipe is actually in good condition, so its only the. Extra grip, render bonding agent that contains a fine aggregate to provide an improved mechanical key before applying render on external concrete, blockwork or brick. drill driver, Jun 21, 2005. If in the top coat the waterproofer or water resistance(r) may/fail and then damp has every chance of getting through. £49.