Product Details. Wait a few minutes, feel the pva. Screwfix Community Forum. RECOMMENDATIONS:Alchemy Plastering. The front apex has often shown signs of water ingress as the mortar lines underneath are often visible after heavy rain. For extra certainty use a render bonding agent such as Sika Rendagrip as a priming coat. High performance waterproof treatment for exterior. Masonry cream is snake oil, it does nothing. As per usual there are so many different videos etc on the web it can get confusing. Deme23 New Member. Thanks. Screwfix customers rate this product 4. Due to the damp problems and salt, I decided to go expensive on bonding and have been caking the surfaces and mortar lines with SBR / cement slurry before rendering. Phil the Paver Screwfix Select. You shouldn't use PVA for external render however they do make an external grade one but this isn't necessary. Phil the Paver Screwfix Select. Sika Waterproof Coating Grey 5kg. Still I`d be interested to hear other peoples approach. External wall is rendered. Glazing and frame sealants come in a variety of acrylic and silicone based sealants, used to keep your home free from water ingress. For use on solid substrates such as brickwork, blockwork and concrete, in moderate exposure conditions. Home Forums > Screwfix Community Forum > Builders' Talk >I will need to clean the base coat which is solidly attatched to the block wall and scratch it, probs with a grinder and apply a new top float coat using a mix of sand / cement / waterproofer and maybe lime as per this sites recomendations. 49Inc Vat. PVA Sealers. Hazard safety codes: Xi, R36, R38, R52, R53. Ask a question. , Apr 8, 2005 #2. Extra Rapid Cement is supplied in weatherproof and tear-resistant plastic bags. Handyandy Screwfix Select. You've done the right thing by removing the render to above the DPC, if yo rendered the lower apart again you'd have to leave a 1" gap which would fill with crud and lead to the DPC being bridged again. KA Tanking Slurry is the complete crystalline solution to waterproofing masonry and blockwork. Adheres to damp masonry and is weather-resistant. Lead-Free. Order online at Screwfix. Buy Jointing Tape at Screwfix. 40 per KG. Order Bostik SBR Admixture White 5Ltr at Screwfix. Home Forums > Screwfix Community Forum > Painters' Talk > Painting render. Ready to Use. Click and collect in as little as 1 minute. VAT. Ensure wall is sound, clean and ready to receive HardieBacker®. He advised waterproof PVA. The biggest problem with a single-skin external wall is condensation which most people confuse with rising damp. Free next day delivery available. Render should be fully dry after a few months,doubt they added a water proofer to render, then it will soak up then rain,& then need to dry again, endless cycle. There are various types for different applications, including quick single coat options. 5010214804764. Expect someone to come along with more modern alternatives. The formula is solvent-free, making it more environmentally friendly by reducing pollution. Discussion in 'Builders' Talk' started by Gary hunt, Oct 23, 2016. Mr. Ideal for Use in Basements/Cellars but may also be Used as an External Coating for Concrete, Brick, Block & Bonded Renders. At minimum, the rear of HardieBacker® 250. 5m x 0. This not painted at the time as suspected water ingress problem however this issue now resolved. When diluted with water it produces a gauging solution for improved adhesion, workability and waterproofing of mortars and cementitious mixes. No waterproofer in render scratch coat. The traditional two coat rendering on a porous surface, i. 8. Currently in Stock. #2. Ideal for use on swimming pools, water tanks, ponds, below ground concrete, as well as for render and floor screeds for water resistant applications. Simple to use, just mix with water. Hi there, I need to find a suitable, waterproof render for a wetroom. ALlow to dry for 4 or 5 days and then finish with a render of 6:1:1 rendering sand:cement:lime. slapiton New Member. PAGE 1 OF 2. com. Hazardous Product – Not available for Mail Order/ TCND outside of Mainland UK. Is Artex Render Waterproof? Discussion in 'Builders' Talk' started by DIYDave22, Nov 8, 2023 at 5:34 PM. today he's applying top coat with no waterproofer. Sika Proof Liquid Waterproofer 5L £7. PVA Sealers. Need some professional advice on waterproofing my 3ft garden flowerbed retaining wall. Suitable for interior and exterior use. I would appreciate a little advice on the making of the waterproof render,thanks. KIAB, Sep 18, 2015. So you need to fit a waterporoof membrane undernearth your inner skin over the studding. Run a hose against it. Cover to control drying - maybe damp down occasionally too. 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 (insisted upon by the local councils conservation officer. The inside of the wet solid walls seems to covered in wet sand and a black paint type substance as in the photos. PVA sealer is an extremely versatile, odourless, waterproof and non-toxic adhesive that is suitable for a multitude of tasks and requirements. the waterproofer will not work!!!!!the top coat must be at least 6 parts WASHED sharp sand 1 part lime 1 part cement {opc}. Developed to repair damaged masonry between brick and stonework. Handyandy - really. View all: Mapei Shower Waterproofing Kits. (the actual water drainage path, which looks like its made of half a sewer pipe is actually in good condition, so its only the. Chemical dpc's are used as a cost cutter and are not really as good as people make you believe. Weberend One-Coat Base Render (OCR) is a versatile pre-blended single coat application render, ideal for rendering brickwork, blockwork and concrete. The rendering is falling off because it is dead and no longer adheres to the surface of the wall. 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. Thompson's Water Seal uses a unique micro silicone emulsion to stop water penetration. Handyandy, Oct 23, 2005. waterproofing paint. 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. Delivery. Key products in the Bostik waterproofing range include: Flexacryl - a flexible, single coat compound for immediate waterproofing over most conventional roofing substrates. Supplied in a graduated bucket. This will depend on the surface of which it's being applied and the strength of hold required. Only way to test if it's still wet is with a moisture meter. Buy Aggregates & Chemicals at Screwfix. Does any one else have the nightmare of render falling off in patches once the. 25 Year Waterproofing from a Single Coat . The Screwfix Community Forum strives to be a friendly and supportive place, where you can share your expertise, ask others for theirs, and enjoy ‘socialising’ online with people who share a common interest. DIY_Has123, Feb 3, 2021. FREE next day delivery available, free collection in 1 minute. Click & Collect. This is especially important if you apply a thick traditional multi-coat plaster. £13. weakening its bond with the brickwork/render. 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. If you are going ot paint it, use a Stabiliser solution first to prime the render then apply two coats of a good masonary paint and you shouldn't have any problems. I know when we do the top coat it's gonna suck the moisture out like crazy. 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 been. This time, its butting up against 12mm plasterboard (painted) which was dabbed directly to the brick (no render). Sharp sand coarse and fine, lime and cement in 2 : 2: 1 :1 ratio for bottom coat ( scratch ) coat, with waterproofer. So it'll be damp from behind (penetrating damp) and damp from below (rising damp), so not much to be gained by. Fill holes and cracks with ease, suitable for many applications. Available in different variants, it is important that the right basecoat paint is chosen for the job. Mix was about the same consistensy as for laying bricks. Buy Fixings & Fastenings at Screwfix. The problem I am having is that the waterproofer in the scratch coat is not allowing the finished coat to go off for up to 8 hours ( wall in shade. 99 Inc Vat. Product code. 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. It is a solution for nothing. 2 coats of 1:4 cement:sand render with waterproofing admix, first (scratch) coat 12 - 15mm with scratches to gove a key to the finish coat 5 - 8mm, 24 hours in between coats. Dow 791 Weatherproof Silicone Sealant Anthracite 310ml (44836) (42) compare. Contains primer, coating and waterproof jointing tape. Extremely durable and will adhere to any substrate for filling and repairs with no depth limit. com. Delivery Next day available. I'm painting a house at the moment and the customer wants a more long term solution so I'm cutting away 4" of render either side of the corner. 3. Reduce cracking and shrinking when mortaring with this SBR bonding agent from Everbuild. Fine. But overmix using Fairey and the mix becomes a foamy mass of bubbles with very limited final strength. For a clear coating over bricks to allow. Cement-based, rapid-setting flexible adhesive. He ended up really busy so we decided i'd. cautious New Member. Covers up to 4m². I have followed the general advice given, 4 : 1 sharp sand / cement with the recommended amount of combined water-proofer / placterciser for good measure for the scratch coat. 30 day money back guarantee. when i removed the old wood it crumbled so i pulled it all off. Ideal for emergency repairs, filling and patching. 99 Inc Vat. Buy Ready Mixed Plaster at Screwfix. 1 Preparing the substrate. £32. The render around the mock Tudor beams on the outside of a property I am looking at is cracked. Buy. Volume. I would get your render on soon so the block work can dry out. Order No Nonsense Anti-Crack Acrylic White 310ml at Screwfix. . Is 3:1 plasterers/rendering sand to cement correct for the scratch coat and what about subsequent coats? What's the maximum thickness of scratch coat and top coats?If you go for this option you'll need to render the stonework first to give you a suitable surface. Weberend One-Coat Base Render (OCR) is a versatile pre-blended single coat application render, ideal for rendering brickwork, blockwork and concrete. 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. 8m)above newly-fitted french doors to render. Out of stock. Ideal for fixings in perforated brick, solid brick, concrete and aerated concrete. Ask a question. Order Thompsons Drive Seal Black 5Ltr at Screwfix. Bonding is not a good idea on external walls, it attracts water to it. It looks like I'd need 3 different types to do the job properly with that stuff but it looks like good stuff. Suitable for new or renovated substrates, either unpainted or painted: gypsum plaster, old painted surfaces, cement, concrete, breeze blocks, bricks, stones, glass and glazed tiles. My sister had her coal cellar done last year, and the guy used Sika 1, then rendered and plastered over it. Option No. I know when we do the top coat it's gonna suck the moisture out like crazy. Sets in 20 minutes. What do you reckon is the prime time to float finish render. I am after some advice if poss. waterproof finish of say, a gloss paint, and finding that underneath is very soluble. 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. View all: Bostik Specialist Paints. Stores are open 7 days a week. Find your nearest Screwfix store and up to date opening times. The shed is 5m x 2m high & has 2 end walls about a metre wide. Ready to Use. 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. oggie78 New Member. It Is single skinned and with render onto boards which were lined with fibreglass mesh. We are ready for your call 24/7. In 20 years of building and renovating, it has never been mentioned in our business. The render goes right down to the ground outside. 90 Ex VAT. 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. I have followed the general advice given, 4 : 1 sharp sand / cement with the recommended amount of combined water-proofer / placterciser for good measure for the scratch coat. £ 27. Home Forums > Screwfix Community Forum > Builders' Talk > Rendering. You might wonder why you need two (or more) coats. 1. 3) Use an additive in a render mix, like SBR to act as a total waterproofer for walls and ceiling, then lay the concrete floor as above. A-. Water vapour permeable. £26. One Coat Render can be used For interior and exterior use and has been formulated for single coat. Use a mixer and measure quatities using a bucket for consistency. The proceedure is:-. He uses plastering sand and cement mixed at a 3:1 ratio with waterproofer added, no lime or plastisiser. Waterproof. Can be used to seal joints between tiles, stone and brick slips and pointing around lead flashing. I know this is not the best route to go in waterproofing a wall normally. 2: Hydrophobic Coatings. The wall has a cavity with no insulation and about 150mm above the damp course. Use a firm hand to. Finishes are subject to high or low maintenance all of which are discussed at time of consultation. Need some professional advice on waterproofing my 3ft garden flowerbed retaining wall. Seeking a bit of advice, been waiting for my plasterer to come and do my external rendering. View all: No Nonsense Water Seal. 1-2hrs Approximate Setting Time. Sharp sand coarse and fine, lime and cement in 2 : 2: 1 :1 ratio for bottom coat ( scratch ) coat, with waterproofer. 5/1 sand & cement if the house is that old i would add a waterproofer too. Screwfix customers rate this product 4. Covers up to 4m². Login to save for later. Thistle One Coat Plaster 7. £39. whats a good method to clean off the scratch coat which has been exposed for some years and is. We also don’t think it’s had waterproofing mixed in. Best chech out the additive that has been used with the manufacturer. I plan to re-flaunch my chimney in April when weather improves. Recycled Polypropylene Construction. The wall has a cavity with no insulation and about 150mm above the damp course. waterproof render. 49 Inc Vat. £3. £59. 54/L quantity Collection Set Store. £6. PermaSEAL 3 Damp Proof Membrane Kit 10m². Buy Roof Repair Products at Screwfix. These kitchen areas can be improved by externally insulation, with either Cellotex or Kingspan, and then using metal lathing to render a good cement/lime roughcast to match the existing property. Login to save for later. High performance waterproof treatment for exterior porous surfaces. Suitable for new or renovated substrates, either unpainted or painted: gypsum plaster, old painted surfaces, cement, concrete, breeze blocks, bricks, stones, glass and. After that, 2 topcoats of a good quality masonary paint, and job done. 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. Using colour dyes to a render coat would not work because the colour would fade over time even if you did achieve a uniformed initial colour when batching up. ★★★★★ ★★★★★. . You must be 18 years old or over to buy this product. Delivery. 3) waterproof paint the bottom exposed brick. 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. View all: Sika Waterproof Sealants. Adhesive can be manufactured from a range of substances, with each having different properties. Buy Cement Mix at Screwfix. Click & Collect. Discussion in 'Builders' Talk' started by questioner, Jul 6, 2007. Suitable for 2. The render would or should have had a waterproofer added to the mix when rendered so it will be waterproof, as the render is new it is not necessary to apply a stabilising solution first, just use a hand brush to go over the surface to remove any dusty muck off the surface. £9. Provides a hard wearing, protective layer on wood, metal and cement. Screwfix customers rate this product 4. My builder is suggesting cutting 100mm of it away at the bottom to let it breath. Will depend on the type of silicon, and will only work with oil based paint. Goddo New Member. dj. I don't see why not to both questions. Is vital that the waterproofer is added in the correct amounts according the the manufactures instructions. Choose this handy pre-mixed sand and cement render from Weber to cover brickwork, blockwork, concrete and other suitable surfaces. As it dries then rough up the surface to match the surrounding render. 99Inc Vat. The fine aggregates are suspended in a unique waterproof polymer to ensure easy application by roller or brush. ★★★★★ ★★★★★. If it was my place I definately would not paint it. But i have a job to do, and i am considerong using sbr bond on it first, as im always interested in new methods. Offers long term durability with no gusting wind noise. Slow setting time makes it ideal for covering large areas in one application. 49Inc Vat. In my experience you can take of the damaged parts and patch in, but personally I would take it all off and start again, making sure that a good key is achieved in the scratch coat (1st coat of render). Ok, I don't know what mix to use, whether to use PVA, or how much waterproofer to add - although all that stuff must be out on the interweb. Any recommendations based on the wall being made from dense blocks?If you were re-rendering the house you wouldnt put a waterproofer on first. Contact the team today by calling 0161 509 9009 or emailing info@emperorpaint. Overcoat 48-72 hours after application with any standard water-based masonry paint or mineral. (£1. I've slapped a PVA solution to brickwork on internal walls prior to render, I GUESS that this situation is no different. 99 Inc Vat. We were looking at using a product like K-rend up to the coping stones. com. Float at 5:1:1 Builders sand : OPC : LIME with waterproofer in the water How does that sound? 2. PVC Construction. Pieces in Pack/Case. Stops freeze thaw damage. 2017 #2. Im nervous about it cracking so please can you confirm the correct mix to use. £ 52. only one left wet. High bond strength. Use stainless steel bellcast/render stop beads as req. Learn more about Graphic Design Architectural Rendering | Victoria, BC. Brick waterproofer to help prevent damp on bricks & masonry. Repels water on wood, brick, concrete, paving, asbestos and cement. , Feb 26, 2008. I wouldn't re-render - leave the bricks open to the air. Does this sound good to you. waterproof render will work however yoy need to overcome the possibility of presure pushing the render off. have 2, or even 3 cups of tea. 25 Inc Vat. Once Stormdry has been applied to the wall surface in a single coat and will permeate deeply before curing to form a. As well as offering protection, exterior wall paint improves the appearance of a property by brightening it up and bringing it back to life. Using a small grinder, cut out all loose chunks of render - & open all sketchy cracks. Render mix. Light Grey. ★★★★★ ★★★★★. The render mix I plan on using for the scratch is 5 sand, 1 cement, 1 lime, splosh of waterproofer, for the top coat, 6:1:1 but no waterproofer. Go all over it and knock off the loose stuff. Product Type. 99 Inc Vat. common sense tells you that this system will go nowhere and it wont. General purpose, solvent-based. DIYDave22 New Member. You can use this all-in-one primer and sealer to form a waterproof layer on outdoor surfaces such as concrete, lightweight. Most if not all are painted with mansonry paint, (Specialist applications excepted, eg. 99 Inc Vat. £21. you can use it for rendering but it's much more difficult to rub up. Click & Collect. Advice on mix varies. Apply Water Seal directly onto damp surfaces to provide long lasting waterproof protection within hours. Not available for delivery. Use it as a bonding agent, primer, sealer and. ssss64 New Member. £8. render on lead. Walls are old super dense concrete blocks. Most if not all are painted with mansonry paint, (Specialist applications excepted, eg. render SamBeevor96__ New Member Renovating an old cottage which has penetrating damp, looking to apply an internal sand and cement render adding thermoseal/waterproofer to stop the damp coming through. giving a lighter easier to work gauge of mortar. It sets to a rock-hard finish and can be overcoated in 24 hours. Volume. I want a rustic finish which is why I'm not going for tiles, and ideally would like something like lime render but would like to know if their are any waterproof plasters / cement or whether you can use what you like but simply give it 2/3 coats of a suitable varnish. Done a good job apart from i didn't put waterproofer in. ★★★★★ ★★★★★. Applied waterproof PVA. Dried clear. I have seen many threads about lime / no lime and whether you should waterproof on the scratch coat / finish coat etc etc. Having said that, there are proper ways to do it - a layer of Tyvek, staple on some. Corrosion-Resistant. Hi, My extension was built and rendered using a sand/cement render around 4 years ago. Screwfix - Rapid-setting waterproof cement. I know I need to attach mesh to the surface, but a friend has told. . FREE next day delivery available,. Low Odour. Sets in 20 minutes. To ensure thorough waterproofing of your exterior walls, you need a coating that will actively repel water. Order Bostik SBR Admixture White 5Ltr at Screwfix. . 5/5. Construction Project Manager, May 29, 2015. TDav Member. £13. PayPal accepted online. Then simply follow the manufacturer's painting guidelines perfectly. com. Order online at Screwfix. €28. Screwfix customers rate this product 4. That allows the material to be worked easier but as you may be aware render doesnt take a lot of working before it falls off the wall. Don't try and apply render in one coat it will only sag and probably fall off wall. 5m x 0. The fine aggregates are suspended in a unique. Find directions and contact info, read reviews and browse photos on their 411 business listing. p) may be an overkill but this is how <u>PROPER</u> tanking should be done and hey better overkill now than taking it. im rendering onto concrete blocks on the outside of my new shed/workshop. FREE next day delivery available, free collection in 1. MyPetFrog likes this. 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. Product code: 252325. Rendering of chimney. • Gives coverage of approximately 2 – 4 m² per litre per coat. £ 28. Covers up to 4m². 4-1 first coat and 5-1 second coat 3-1 is to strong it will be to brittle and might crack. dj. But it has no brick exterior wall. If you are going ot paint it, use a. 6 January 2021 at 10:22PM. 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). £30. Low Odour & Solvented. 3N dense concrete blocks. com. £2. I've attached some images. We stock Everbuild PVA, ideal for use as a contractors PVA due to its high strength. Items are easy to install and use while. The pointing needs raking out 25mm deep, and re-pointing with a 4:1 sand & lime mix. com. Sealing porous areas and extending coverage with paint sealer will ensure a longer lasting coat. 99 Inc Vat. Home Forums > Screwfix Community Forum > Builders' Talk > Help with Rendering please Discussion in ' Builders' Talk ' started by mikethesmoke , Apr 26, 2009 . I have a small area (2. With top trade brands available, offering great quality products, you'll be able to continue working even on the.