Hi there, I need to find a suitable, waterproof render for a wetroom. Hi Guys. Ask a question. Stops penetrating damp on brickwork and masonry. As it dries then rough up the surface to match the surrounding render. Hi, I have an 1910 solid brick, no cavity built house that is all pebble dashed. 45 Inc Vat. Then sharp sand fine, lime, cement in 6: 1: 1 ratio as top coat. #2. 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. PVA Sealers. That's not to say lets seal the moisture in the bricks. Primer Not Required. Still I`d be interested to hear other peoples approach. 30 day money back guarantee. Buy Fixings & Fastenings at Screwfix. . #3. There are many external finishes - Finedown (smooth as in photos), Tyrolean, Pebble dash etc. #2. Bostik Waterproof Cement Grey 10kg (58196) Bostik Waterproof Cement Grey 10kg. Product Type. you will then have a render. #2. Sika Waterproof Coating Grey 5kg. Im an old skool plasterer ( 34 years old ) And when i am rendering i use sand,cement and waterproofer/feb. Most external decorative renders are painted, most have a combined waterproofer and plasticiser addidive in last coat. £8. Was going to brush over the cut end with SBR slurry then render, just wondered on this small area can I just use 1 coat, 5 sharp sand / 1 cement with a splash. 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. Free next day delivery available. 8/5. Easy returns, with 30 day money back guarantee. Use a firm hand to. £13. Ready to Use. Inc. . Minimum application temperature. the waterproofer will not work!!!!!the top coat must be at least 6 parts WASHED sharp sand 1 part lime 1 part cement {opc}. 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. 1st coat scratch 1:1:4 (OPC:lime:sand), 2nd coat 1:1:5. PAGE 1 OF 2. 14th edition, Oct 12, 2017 #1. As well as waterproofing, this product also helps to prevent condensation and efflorescence, keeping structures in great condition for longer. For Interior & Exterior Use. Suitable for brush application only. 25 Year Waterproofing from a Single Coat . 99 Inc Vat. Order Bostik SBR Admixture White 5Ltr at Screwfix. Delivery 7 days a week. uk. drill driver, Jun 21, 2005. I intend to apply sandtex stabilising solution and then sandtex fine texture paint which say's it has a breathable waterproofer in it. Designed to function against water penetration in various conditions, it can be used in foundation slabs, tunnels,. Remove as much dust as you can and apply a decent coat , you may want to apply a second , then throw sand over the area of bitumen this will help key the render , the next day apply a scratch coat over area and leave until dry , apply top coat of render and set to finish. Prepare walls by straightening them out with a two coat render system and a waterproofer agent added to mix. Screwfix - Rapid-setting waterproof cement. For use on solid substrates such as brickwork, blockwork and concrete, in moderate exposure conditions. 99 Inc Vat. Light grey colour when dry. Currently in Stock. Anyone able offer advice on what type of paper i need as I can only find something called tyvek and the images seem to be using it. 2/5. Preparation of the surface to be painted with gloss. Sika Bond SBR+ Waterproof Bonding Agent and Mortar Sika Bond SBR+ is a one component, water based, general purpose, styrene butadiene rubber emulsion bonding agent and mortar admixture. 2) Fit a bellcast. Because it's durable, weather-resistant and breathable, Weber one coat render is particularly useful for outside areas that are exposed to the weather, like garages, conservatories or garden walls. Then simply follow the manufacturer's painting guidelines perfectly. The wall has been constructed out of 7n concrete breeze blocks and before i backfill i need to waterproof, it needs to be plant friendly. £3. FREE next day delivery available, free collection in 1 minute. Designed to be used for plasterboard internal corners. FREE next day delivery available, free collection in 1. Silicone render and waterproofing for penetrating damp. Buy. chillimonster Screwfix Select. very big difference. A typical mix to produce a water resistant mortar or render would be sand:cement 4:1 using SBR Bonding Agent diluted 1:3 with water as the gauging water Application – Bonding Agent For bonding render or plaster use SBR Diluted with water 1:3 or 4. 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. Applied waterproof PVA. My sister had her coal cellar done last year, and the guy used Sika 1, then rendered and plastered over it. First time doing render and there will be soil behind the wall but only to a depth of 300-400mm, should the back be left unrendered but with some waterproofing and drainage? Also thinking of putting some dpm behind the bottom of render as in attached pics or is this overkill! Any helpful suggestions welcome, thanks in advance!hi all,my mate wants me to re-render his damp bathroom. Dow 791 Weatherproof Silicone Sealant Anthracite 310ml (44836) (42) compare. Softwashing is the best way of cleaning your render. do i need to apply a thick scratch coat beforehand?? I was thinking of just applying a thin waterproofing mortar just to smooth pores in the block, joints etx, and apply this acryllic on top of. com. Provides perfect adhesion without the use of a primer, even on damp substrates. Any thoughts anyone? Plumbcrazy,. Wire brush the exposed walls to be sure that there is no mould on the. A nightmare rendering on smooth lightweight blocks, hate it. My qustion is: Will I need to use a (waterproofing?) additive to the render mix, particularly for the inside surfaces of the drain. PVC Construction. Developed to repair damaged masonry between brick and stonework. Sika 1 Waterproofer is an aqueous solution containing complex colloidal silicates. Acrylic frame sealant is ideal for internal use to fill. It sets to a rock-hard finish and can be overcoated in 24 hours. unfortunately came home yesterday and all covered in scratch coat with no waterproofer. Render question. Glazing and frame sealants come in a variety of acrylic and silicone based sealants, used to keep your home free from water ingress. Rendering of chimney. Hi i've built some raised flower beds / planters out of dense concrete blocks. waterproofing paint. Try on a couple of places (bottom of wall more likely to have weak adhesion). Apply a bitumen or Pitch Epoxy coating from the outer edge of your 'slope' all over the existing dpc and up the wall 150mm. Delivery. I'm having to strip back and re render the walls where the shower is going as the plaster is poor and has been sealed with pva i think. Click & Collect. Fast-Drying. unfortunately came home yesterday and all covered in scratch coat with no waterproofer. PVA is a water-insoluble resin which is typically white at the point of application, but dries colourless and has a high bonding strength. The lime render was there for a reason, its breathable, lobbing in cement isn't a good idea, it may cause problems with moisture depending on the wall, you can buy a lime render mix. On dense, less absorbent brickwork or render, coverage of the brick waterproofer can be increased by up to 10m² per litre. Ideal for emergency repairs, filling and patching. Discussion in 'Builders' Talk' started by questioner, Jul 6. I have a small area (2. We were looking at using a product like K-rend up to the coping stones. Forms a transparent, waterproof barrier. 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. Change the physical properties of building chemicals to suit the job. Contains primer, coating and waterproof jointing tape. HandyAndy - really. FREE next day delivery available, free collection in 1 minute. So I think the order from inside to outside should be:- inner skin, waterproof membrane, studding, insulation, blockwork and then your render. PVA Sealers. Can anyone give me advice on rendering over Medium Density Blocks for an external garage. 99 Inc Vat. Don't listen to jim he doesn't know that hes talking about you always 2 coat all render, bricks also. The lime render was there for a reason, its breathable, lobbing in cement isn't a good idea, it may cause problems with moisture depending on the wall, you can buy a lime render mix. Discussion in 'Builders' Talk' started by pete12, Jan 26, 2006. drill driver New Member. 99 Inc Vat. £179. Grey. dougalhouse Member. May produce an allergic reaction. he says his shower has been leaking against the wall to which it is mounted. 25 Inc Vat. 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. The earth is retained in the garden with another wall. Does any one else have the nightmare of render falling off in patches once the. £26. I have seen many threads about lime / no lime and whether you should waterproof on the scratch coat / finish coat etc etc. I know when we do the top coat it's gonna suck the moisture out like crazy. Will not corrode steel reinforcement (brick ties etc. Need some professional advice on waterproofing my 3ft garden flowerbed retaining wall. This coat should be applied while the first coat is still. The wall is hollow concrete block, backfilled with concrete and reinforced to some rather substantial footings. Getting the mix spot on is the key!Stormdry is a colourless [1], breathable, water-repellent treatment for brick, concrete and stone [2] walls. Wet room Kits consists of a mix of products which are needed when creating an open plan showering area. £59. Is there anything I can do now. Fine. The moisture will force its way out eventually. Is there anything I can do now. Aggregates & Chemicals. I’m doing the patio and the. Bostik Concrete Sealer 5L. 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. What do you reckon is the prime time to float finish render. Im nervous about it cracking so please can you confirm the correct mix to use. Items are easy to install and use while. The traditional two coat rendering on a porous surface, i. Prop the hose up splashing against the wall and go and have a cup of tea. Roughly 1 of cement, 1 of lime, 4 of sand (usually sharp), below dampcourse, no need for waterproofer (some put it in anyway-also helps spreadability). Waterproof render (sika 1) on the walls and d&d insulated plasterboard. com. 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. 96 per L . I wouldn't bother with grinding the wall either just scratch 4-1-1 sand-cement-lime with waterproofer. 1. Microseal Technology. Extremely durable and will adhere to any substrate for filling and repairs with no depth limit. Protecting from rain, frost, ice and snow, this product is ideal for providing extra protection to your home's exterior. Most external decorative renders are painted, most have a combined waterproofer and plasticiser addidive in last coat. She got the guy back and he said 'oh well, it hasn't worked, you need the place tanking which. We are ready for your call 24/7. Render is max 10-15mm thick. £6. waterproofing paint. 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. 6 January 2021 at 10:22PM. (we could render the side but not the back). PayPal accepted online. 8/5. £ 52. Product Details. 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. Most if not all are painted with mansonry paint, (Specialist applications excepted, eg. Over 40,000 products. Mix approximately 4 to 5 litres of water per 25kg bag using an electrically driven mixer until you achieve a workable consistency. VAT £15. The DPC is there to stop raising damp, the rendering should be waterproof so it's not going to cause a raising damp issue, lots of houses have render right down to the ground level, though a lot of them will have a kicker plinth at the point of DPC to stop rain water running down the wall beyond the DPC, this. General purpose, solvent-based. Buy Cement Mix at Screwfix. Add for Delivery. Im asking for some advice on the best way to repair this. Product code: 252325. Weber One Coat Base Render 25kg £18. Handyandy - really. Suitable for Water, Oils & Chemicals. Overcoat 48-72 hours after application with any. Bostik Roof Repair Compound Black 1kg (57518) Bostik Roof Repair Compound Black 1kg. Thermalite hedge their bets somewhat on their finishes section. Ideal for locations such as basements and cellars or for external coating for concrete, brick, block and bonded renders. Cementone Freeflo Plasticiser is a retarding waterproofer and plasticiser. You shouldn't use PVA for external render however they do make an external grade one but this isn't necessary. Garage, garden, whatever. Sika Waterproof Coating Grey 5kg (83502) (68) compare. If the wall is dry (unlikely this year!) lightly damp it without soaking it completely before applying the. After application by brush, roller or spray; Stormdry provides breathable protection against rain penetration on exterior weather-facing walls. Order No Nonsense Anti-Crack Acrylic White 310ml at Screwfix. Not available for delivery. gauge everything put the water in the mixer then add the lime to the water ,once the sand and cement is added let it MIX!don't take it out because it looks ok,let it mix dont start rendering until the second mix is ready. £ 21. common sense tells you that this system will go nowhere and it wont. So it'll be damp from behind (penetrating damp) and damp from below (rising damp), so not much to be gained by. 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. normal bricks and most blocks, calls for a 1:1:6 mix for the scratch coat; cement, lime and sharp sand (3mm to fines). DIYDave22 New Member. Morning all, I'm looking to render 3 garden walls, all made from 7. This would be better off in plastering forum. Corrosion-Resistant. It looks like I'd need 3 different types to do the job properly with that stuff but it looks like good stuff. Strong fibreglass mesh tape that helps reinforce plaster coating and protects it from cracking. Finish second coat with sponge or wooden float. What depth should the battons for the scratch coat be? I was looking at 10-15 mm deep off the wall. Fixing sheets with tile adhesive, step 1. Handyandy, Oct 23, 2005. Add 1 cup of a waterproofing render mix per bucket full of water you mix. Latest Offers At Screwfix. Can be applied onto a damp. ssss64 New Member. IKOpro Synthaprufe Trade is easy to apply and provides damp proofing for concrete floors, foundations and masonry walls below, at or above ground level. Buy Exterior Paints at Screwfix. Free next day delivery available. . Render, Bricklaying and Floor Screeds. 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. Do what the gardener should have done. Covers up to 4m². Delivery Next day available. com. Home Forums > Screwfix Community Forum > Builders' Talk > Help with Rendering please Discussion in ' Builders' Talk ' started by mikethesmoke , Apr 26, 2009 . Click & Collect. I plan to re-flaunch my chimney in April when weather improves. 99. Buy Multi Purpose Fillers from Screwfix. £2. Many can be painted over to match the colour of your windows or frames. Can any EXPERIENCED plasterer advise if I can render over existing multi finish plastered wall with sand and cement (with added waterproofer) to level it out as its bowed? I don't want to use browning or bonding as it sucks moisture and this is an exterior solid non cavity wall. i now have to patch it up, about a 2 inch strip. 5 apply new finish. com. The Sandtex Brickwork Waterproofer & Protector provides a clear waterproof protective layer for bare brickwork. giving a lighter easier to work gauge of mortar. If the wall is wet, not sure trapping the damp in the wall in under new. final coat of render needs to. Or it could look like an unfinished wall (which, of course, it is ) I think it looks good in these photos. Sharp sand coarse and fine, lime and cement in 2 : 2: 1 :1 ratio for bottom coat ( scratch ) coat, with waterproofer. Corrosion-Resistant. Reduces water penetration without acting as a vapour barrier. 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. General purpose, solvent-based. If you don`t want waterproofer at least use a plasticiser or lime. 99. Screwfix Community Forum. Home Tags > waterproofer. com. Contact the team today by calling 0161 509 9009 or emailing info@emperorpaint. Click & Collect. Buy Cement Mix at Screwfix. Screwfix Community Forum. I don't see why not to both questions. Tarmac One Coat Renders can be applied with a trowel of float. FInish with horizontal scratches for a key. 1. The fine aggregates are suspended in a unique waterproof polymer to ensure easy application by roller or brush. 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. #10. Low Odour. 2. K Rend). It incorporates a Polymer bonding aid allowing the results. Only way to test if it's still wet is with a moisture meter. RECOMMENDATIONS:Alchemy Plastering. there is a waterproof pva available which some say would work ok, but the consensus here is that either sbr or a sand/cement. £49. The fine aggregates are suspended in a unique waterproof polymer to ensure easy application by roller or brush. Crack & Frost-Resistant. You can use metal beads for all windows and angles and drip beads for your bell. Using a small grinder, cut out all loose chunks of render - & open all sketchy cracks. Extra Rapid Cement is supplied in weatherproof and tear-resistant plastic bags. The render goes right down to the ground outside. Ricky Johnson New Member. I have used a slurry coat first of. Two thin render coats. Delivery. DIY_Has123 Active Member. Handyandy Screwfix Select. Click & collect in stores nationwide. + silcone the windows. From what I’ve read on this very helpful forum, it’s a water/salt problem. Option No. For Indoor Use. I will be hacking off and re rendering the whole house, The time between hacking off and rendering, will the house be no longer “waterproof” and get damp inside if it rains?I've done some DIY plastering, but have no knowledge of rendering, so would anyone be able to help me out with some info, please? The bathroom walls were originally rendered half-way up, and its so hard to remove, I would like to leave the existing rendering in place and just add new render the remaining top half. Inc. Is vital that the waterproofer is added in the correct amounts according the the manufactures instructions. Sets in 20 minutes. remove all dust. This sealant is suitable for for repelling water on porous surfaces. Everbuild’s Black Jack paint is perfect for. Screwfix Community Forum. 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. KIAB, Sep 18, 2015. Low toxicity. render on lead. If you do not want to change the appearance of these walls then use a masonry waterproofer (two coats). Totally forgot as was so busy myself and only had a spare few days to do it. don't pva the wall either first coat with waterproofer in and second coat with waterproofer in also. com. com. Discussion in ' Builders' Talk ' started by Fussy Spark, Dec 27, 2020 . (£5. 3N dense concrete blocks. only one left wet. Render up to (or very slightly below) the damp course, finishing with a 25° slope down and outwards from the dpc. To ensure thorough waterproofing of your exterior walls, you need a coating that will actively repel water. Login to save for later. Order Bostik Waterproof Cement Grey 10kg at Screwfix. Must be quite loose, but not too runny. Also for repairing cracks and damaged stone edges. Most external decorative renders are painted, most have a combined waterproofer and plasticiser addidive in last coat. Do I have to waterproof the blocks first or use a waterproofer in the render?As expected all the windows seem to be missing the silcone and allowing water to get in. Will this be enough. SKIP19C THOMPSONS WTRSEAL ULTRA WTRPRFG. Designed for use in fully. It's like comparing a totally waterproof jacket costing £500 with a 'showerproof' jacket costing £25. Cmd38 New Member. 5 Ltr. £18. Screwfix Community Forum. ie. #2. If it's a cavity, before you go down the render route, go find a builder and ask him how much to rebuild the outer skin of the end gable wall. Screwfix Community Forum. 5/ plaster to suit. Products reviewed by the trade and home improvers. £ 28. Will fill without depth limit and repair without formwork. £45. 1. I've panelled it off with 3/4" exterior ply, fitted a stop-bead (or whatever it's called) along the bottom edge, and am now looking for advice on how to prepare the surface for rendering, please. Â, Dec 1, 2007. 99. . Effective sealer for waterproofing damp walls. . 4-1 first coat and 5-1 second coat 3-1 is to strong it will be to brittle and might crack. A complete crystalline solution for waterproofing masonry and blockwork. After application by brush, roller or spray; Stormdry provides breathable protection against rain penetration on exterior weather-facing walls. Product Type. Heat-Resistant. How many coats do you reckon fort he top coat?Water resistant bonding agent for external rendering and screeds; Admixture for concrete repair and tile fixing mortars; For improving resistance to abrasion, chemicals and oils; Reduced shrinkage and cracking; Improved workability, waterproofing and mechanical properties; Approx consumption : 5 - 7 Litres per 25Kg cementOrder online at Screwfix. Seeking a bit of advice, been waiting for my plasterer to come and do my external rendering. apply the sand and cement to above 1/4 inch of the existing. 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. Volume. 95 Ex VAT. Waterproof. . the problem comes because one of the old walls has the damp course below of extension. hi what is the best mix ratio for rendering internal wall . Protect and reinforce joints. This is called Feeze-Thaw action, which allows more water in, gradually. £8. Can I tile onto render that has been made up with plastering sand and Sika1 waterproofer or should I plaster then tile?but im having a nightmare. the waterproofer will not work!!!!!the top coat must be at least 6 parts WASHED sharp sand 1 part lime 1 part cement{opc}.