#10. Phil the Paver Screwfix Select. Tapes suitable for a range of materials stocked. . I then intend to paint on something called a cementone aquaprufe, which is a cold applied bitumen to the wall, and then finally dot and dab standard 12. Show More. This sealant is suitable for for repelling water on porous surfaces. Best chech out the additive that has been used with the manufacturer. (£1. com. Choose from top trade brands. £45. Sets in 20 minutes. Order online at Screwfix. 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. Ideal for locations such as basements. Coverage per Litre: 6m²/Ltr. Bonding is not a good idea on external walls, it attracts water to it. 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. Ensure wall is sound, clean and ready to receive HardieBacker®. Styrene-free, vinylester-hybrid, high performance mortar for the most demanding requirements. Delivery Next day available. Most external decorative renders are painted, most have a combined waterproofer and plasticiser addidive in last coat. Hello. Discussion in 'Builders' Talk' started by questioner, Jul 6, 2007. 12-16m²/Ltr. 4m²/Ltr. Hi handy 007 1/2. 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 i use waterproofer in both the base render and top render? My plan was to prime the brick first with 3:1 unibond and then 1:1 unibond as i offer up the base render. Click & collect in stores nationwide. Handyandy - really. Screwfix Community Forum. Then simply follow the manufacturer's painting guidelines perfectly. Do what the gardener should have done. £ 27. Corrosion-Resistant. Damp walls can cause salt deposits to appear – these can blow your plaster. com. My builder is suggesting cutting 100mm of it away at the bottom to let it breath. 310 ml. Designed to be used for plasterboard internal corners. Click & Collect in as little as a minute. Provides perfect adhesion without the use of a primer, even on damp substrates. VAT. waterproofing paint. I'd get rid of the rusted steel regardless of what you do (unless you tile) as it will bleed through render etc BMC2000 , Oct 10, 2017Hah. Daveukleics Member. Sharp sand coarse and fine, lime and cement in 2 : 2: 1 :1 ratio for bottom coat ( scratch ) coat, with waterproofer. com. Thermalite hedge their bets somewhat on their finishes section. Ka Tanking Slurry Waterproofing Solution Grey 25kg. 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. 3) waterproof paint the bottom exposed brick. Suitable for the damp proofing of interior masonry wall surfaces. dougalhouse Member. Home Forums > Screwfix Community Forum > Builders' Talk > Rendering. Not available for delivery. £30. Handyandy, With your technical knowledge of paint it is a relief that you don't work as as brain surgeon with an equivilent knowledge of neurology. 1. This is called Feeze-Thaw action, which allows more water in, gradually. Bostik 1kg Cementone Colours for Cement - Buff (47) £9. Screwfix Community Forum. com. He came back and redid that area, and it leaks there worse than ever - it's just like a sponge. Designed to function against water penetration in various conditions, it can be used in foundation slabs, tunnels,. Ideal for Use in Basements/Cellars but may also be Used as an External Coating for Concrete, Brick, Block & Bonded Renders. . 5mm² Cables. Suitable for ceramic, porcelain and non-moisture. There are various types for different applications, including quick single coat options. 80/Ltr)I am building an outdoor kitchen for gas bbq etc. 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. 1st coat scratch 1:1:4 (OPC:lime:sand), 2nd coat 1:1:5. Buy Aggregates & Chemicals at Screwfix. B&L, Choose one or the other. Rapid-setting waterproof cement. I’m leaning more towards K rend, as it’s silicone and. Is unibond OK 2. 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. Exterior rendering is, I think, a more manageable beast that, say, internal skimming. damp down the area your about to work on to get rid of the dust. Nail straight pieces of timber vertically & horizontally as required to external corners, window & door reveals. com. You can sand down the corners as far as poss and put a few coats of red oxide or any other number of magical rust cures, I've done it a few times, it will buy you a year or two. Use it after clearing. £6. The old injection attempt has not worked, and neither has the inside attempt to render to 1m ht. com. Once the wall is cleaned off treat it with an external sealer diluted to 2 parts sealer to 1 part water and mix thoroughly. By getting the finish coat on within 8. 90min Approximate Setting Time. Order No Nonsense Anti-Crack Acrylic White 310ml at Screwfix. If it was my place I definately would not paint it. render on lead. Sets in 20 minutes. Colour coded for easy identification. Most traditional renders are applied in two coats; a base coat and a topcoat. Free returns. dj. Good luck. My idea is to remove the lose render from around the window (as I have started to do already) + remove any old foam. £ 24. Morning all, I'm looking to render 3 garden walls, all made from 7. Product code. Screwfix Community Forum. Items are easy to install and use while. We encourage you to debate the topics and issues of the day in a friendly manner, whether related to trade/DIY or not. Need some professional advice on waterproofing my 3ft garden flowerbed retaining wall. The rest of the building had bell beading so it was only about a 4 metre section I had to do. Fillers and Putty are used to fill or seal holes, cracks, or gaps prior to further decorating. Sanitary Fixings Kits. Volume. Home Forums > Screwfix Community Forum > Other Trades Talk > waterproofing internal rendering Discussion in ' Other Trades Talk ' started by woodburner , May 16, 2006 . 5m x 0. The pointing needs raking out 25mm deep, and re-pointing with a 4:1 sand & lime mix. ST100 104Ltr Spill Tray 795mm x 1195mm x 185mm (769HJ) compare. Suitable Application. Voltage Proof at 3000V. waterproof render. Dow 791 Weatherproof Silicone Sealant Anthracite 310ml (44836) (42) compare. 99. When diluted with water it produces a gauging solution for improved adhesion, workability and waterproofing of mortars and cementitious mixes. Choose from top trade brands. Pay your way. Discussion in 'Builders' Talk' started by Victor Lek, May 24, 2022. Scratch coat is 1 part cement, 1 hydrated lime, 5 plastering sand, with fibreglass mesh embedded. FREE next day delivery available, free collection in 1 minute. Over 40,000 products. 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. 7 litres of SBR per 25kg bag of cement to give a totally waterproof render. Delivery Next day available. These can be used for a range of projects, whether it is to create a flat a smooth surface with a compressive strength, preventing water and damp penetration in walls and. The traditional two coat rendering on a porous surface, i. Buy Cement Mix at Screwfix. Buy 3 for £11 - View Offer. Sika Waterproof Coating Grey 5kg (83502) (67) compare. 99. 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. £9. KIAB, Sep 18, 2015. £9. 49 Inc Vat. Waterproofs Plaster, Plasterboard, Plywood, Render & Concrete. This is your 'drip-tray' separating the above and below dpc areas. Is Artex Render Waterproof? Discussion in 'Builders' Talk' started by DIYDave22, Nov 8, 2023 at 5:34 PM. Render, Bricklaying and Floor Screeds. Good Luck. Can anyone tell me which is the best silicon based waterproofer they have used for waterproofing an exterior stone wall. I am after some advice if poss. com. Masonry paints are specifically for exterior use and will protect a property from weathering and pollution. Cement-based, rapid-setting flexible adhesive. ex. Phil the Paver, Nov 22, 2014. Waterproofs Plaster, Plasterboard, Plywood, Render & Concrete. This would be better off in plastering forum. com. Single application waterproofing compound for emergency repair and general maintenance of most roof types. For External Use. 99 Inc Vat. There are many external finishes - Finedown (smooth as in photos), Tyrolean, Pebble dash etc. 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. Ideal for use on swimming pools, water tanks, ponds, below ground concrete, as well as for render and floor screeds for water resistant applications. Buy Cable Sleeving at Screwfix. Handyandy - really Mr. Waterproof a leaking roof. Choose this handy pre-mixed sand and cement render from Weber to cover brickwork, blockwork, concrete and other suitable surfaces. You would usually add waterproofer to the scratch coat (base coat), & again to final/floating coat (top coat). Hi, I wonder if anyone can help/ offer some advice as we’re at our wits end. Step 6 – Apply First Coat of Render to Wall. Contains enough to waterproof a standard sized shower. Delivery. Applying the board directly onto the membrane with thin adhesive and mushroom fixings. The last thing you need for tiling is a skim finish - tiling takes best on a background float such as a 3:1 mix of sand and NH lime. 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. View all: Bostik Specialist Paints. Extremely durable and will adhere to any substrate for filling and repairs with no depth limit. This is to avoid spraying the chemicals which can then drift in. Sealing porous areas and extending coverage with paint sealer will ensure a longer lasting coat. On dense, less absorbent brickwork or render, coverage of the brick waterproofer can be increased by up to 10m² per litre. Key products in the Bostik waterproofing range include: Flexacryl - a flexible, single coat compound for immediate waterproofing over most conventional roofing substrates. 5mm plasterboard to the wall, and then skim. PVA Sealers. I've heard bad things about Sika, re: not being suitable for moxing in a cement mixer: online at Screwfix. 99Inc Vat. 99 Inc Vat. Volume. Light grey colour when dry. Light Grey. The rendering is falling off because it is dead and no longer adheres to the surface of the wall. PVA wall first. ★★★★★ ★★★★★. This coat should be applied while the first coat is still. Another difference is that a proper plasticiser has a limited amount of air entraining ability so that leaving the mix turning too long has no detrimental effect on the mortar. Screwfix Community Forum. Use a firm hand to. Mix approximately 4 to 5 litres of water per 25kg bag using an electrically driven mixer until you achieve a workable consistency. Contains enough to waterproof a standard sized shower. £21. setting manholes and repairing rendering and floor screeds. Fixing sheets with tile adhesive, step 1. AC50 Trade Acoustic Adhesive & Sealant 900ml. Fill in gaps. uk. (former damp problems)And install 22mm insulated plasterboard over that. 8/5. Light Grey. Coverage: Approximately, 1 litre of SBR per sq metre at. FREE next. You shouldn't use PVA for external render however they do make an external grade one but this isn't necessary. Never heard of the 4 weeks / mould thing before. 99Inc Vat. 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 so never gets much sun. PVA Sealers. Buy Fixings & Fastenings at Screwfix. I guess the best way to render the bell bead is in two parts. Charlie Far!ey New Member. If you don`t want waterproofer at least use a plasticiser or lime. Primer Not Required. Currently in Stock. Pieces in Pack/Case. Ideal for emergency repairs, filling and patching. The. Volume. Domestic & commercial use. Dried clear. The Sandtex Brickwork Waterproofer & Protector provides a clear waterproof protective layer for bare brickwork. Supplied in a graduated bucket. when i removed the old wood it crumbled so i pulled it all off. 1 Year Guarantee. The process involves using a detergent to chemically clean the render using next to no pressure at all. 49Inc Vat. 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. horses for courses, take your pick!! good luck. This is your 'drip-tray' separating the above and below dpc areas. Victor Lek Member. A complete crystalline solution for waterproofing masonry and blockwork. From waterproof adhesive to glass adhesive, it is important to choose the right glue for the job. But it has no brick exterior wall. final coat of render needs to. weakening its bond with the brickwork/render. 8/5. 3. Exterior decorators acrylic for sealing around exterior window and door frames in most building substrates. We were looking at using a product like K-rend up to the coping stones. FREE next day delivery available, free collection in 1 minute. Softwashing is the best way of cleaning your render. PVA sealer is an extremely versatile, odourless, waterproof and non-toxic adhesive that is suitable for a multitude of tasks and requirements. Primer Not Required. Order online at Screwfix. Add for Delivery. 5 apply new finish. Product Type. 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. 99Inc Vat. South Gloucestershire Technical Advise Leaflet : Lime Render 2 Introduction Render was originally used to provide a protective covering to stone or brickwork. May produce an allergic reaction. Fast-Drying. 8/5. Forms a transparent, waterproof barrier. It is supplied in the form of a deeply penetrating cream that is applied to the wall surface using a roller or brush. FREE next day delivery available, free collection in 1 minute. Thompson's Water Seal uses a unique micro silicone emulsion to stop water penetration. #2. General Purpose Mortar. 8m)above newly-fitted french doors to render. Went on white. KIAB Super Member. Additional information. Order online at Screwfix. PAGE 1 OF 2. The wall has a land drain behind to reduce hydrostatic pressure. After that, 2 topcoats of a good quality masonary paint, and job done. Just wanted to check what mixture of sand/cement I need to use for the render for this? is it Scratch coat of 4:1 sharp sand to cement and then top coat of 5:1 sharp sand to cement? Do I need to do any waterproofing? Looking to get something like in the attached. + silcone the windows. Cmd38 New Member. Depending on the ratio you used for waterproofer/water in your mix you should find that the render is virtually weatherproof. £8. You capture lots of potential issues in one go, including new ties and new DPC, and probably the opportunity for some insulation. Need to paint render which was applied about 4 years ago apparently with waterproofing element included. Weber One Coat Base Render 25kg. Lead-Free. , Feb 26, 2008. ★★★★★ ★★★★★. Use a coat of 2:1 sand cement with waterproofer followed by a 3:1 and then a 4:1 (all with w. Mix approximately 4 to 5 litres of water per 25kg bag using an electrically driven mixer until you achieve a workable consistency. 5. Pieces in Pack/Case. Then sharp sand fine, lime, cement in 6: 1: 1 ratio as top coat. Using a small grinder, cut out all loose chunks of render - & open all sketchy cracks. I intend on having the front of the wall rendered so it is important that it is sealed correctly. 99 Inc Vat. They have for example render products which are waterproof, yet breathable. The waterproofer acts as a plasticiser also, in fact with a rather coarse sand it is a far better plas than plas! A 10-15mm floating coat is good, use a length of 2x1 roof lath to rule it straight then when it has taken up enough float it all filling in all the slacks (holes) then finish with a damp rung out sponge (optional). If you do not want to change the appearance of these walls then use a masonry waterproofer (two coats). Buy Roof Repair Products at Screwfix. Order online today. Will fill without depth limit and repair without formwork. 1. 24 kg. Designed for use in fully. It has many uses, and is suitable for most porous. 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. The fact that it's a retaining wall means that it's going to be damp, almost by definition. Waterproof. You must be 18 years old or over to buy this product. If you wait then water will get in behind it and more and more will fall off. 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. 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. Adheres to damp masonry and is weather-resistant. View all: Bostik Specialist Paints. The 2nd. Covers approx. Interior Wood Paints. Overcoat 48-72 hours after application with any. Mr. Mix it strong say 3:1:1 or 3:1 plus plasticiser. EVeryone seems to have their own opinion and hardly. Ask a question. 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. com. You could have asked the plasterer to add a waterproofer to the render mix, but it's obviously too late now. Applied waterproof PVA. I'm no pro on this, but have done a lot of research into it. The PVA glue can be dilated up to 5:1 with water for maximum use. G4 Pond Sealer Clear. giving a lighter easier to work gauge of mortar. There is a white crystal deposit under left on the exposed render. We're getting a lot of confusing/conflicting information regarding painting it: How soon can it be painted (weather permitting of course, it's in Brecon) Sandtex tell me their products aren't compatible with PVA, therefore not to use it. No waterproofer in render scratch coat. 5/5. 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. £179. ★★★★★ ★★★★★. PVA is a water-insoluble resin which is typically white at the point of application, but dries colourless and has a high bonding strength. Any advice would be greatly received, we dont want to knock it down. Having said that, there are proper ways to do it - a layer of Tyvek, staple on some. Need some professional advice on waterproofing my 3ft garden flowerbed retaining wall. Screwfix Community Forum. Does any one else have the nightmare of render falling off in patches once the. Most external decorative renders are painted, most have a combined waterproofer and plasticiser addidive in last coat. The paint has been fine until this very wet spring, when it started to bubble and peel in large random areas. 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. Click & Collect. Creates smooth, easy to work with mortar. 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. Cement based coating for preventing water and damp penetration in walls and floors. View all: Thompsons Water Seal. Delivery. Click & Collect. This waterproofer penetrates deep into the brickwork whilst still allowing the surface to breathe. This is an interior wall but yes its a wall with a window and other side is exterior. Ideal for internal and external use as a waterproof render, it is suitable for use on walls prior to plastering and on floors prior to self-levelling. And all this after the walls were skimmed and painted. blertsville, Jul 4, 2011. Just. This is an interior wall but yes its a wall with a window and other side is exterior. 90m x 50mm. Permaproof Waterproofer - Render Additive 5L. Discussion in ' Builders' Talk ' started by roger waters, Sep 11, 2006 . It sets to a rock-hard finish and can be overcoated in 24 hours. Suitable for 2. I have used a slurry coat first of. Fischer FIS V Zero 300T Injection Mortar 300ml (498HL) compare. Not available for delivery. today he's applying top coat with no waterproofer. Given the time since it being applied does this need to have stabilising and/or waterproofing coat before painting?Yes to a mist coat - I generally thin by about 30 - 40%. He advised waterproof PVA. 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. External wall is rendered. 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). Sika Waterproof Coating Grey 5kg (83502) (68) compare. She got the guy back and he said 'oh well, it hasn't worked, you need the place tanking which. To ensure thorough waterproofing of your exterior walls, you need a coating that will actively repel water. Render question. 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. Need to render an external wall or building? The Everbuild 507 Rendagrip bonding agent will help ensure your render sticks firmly to the desired surface. 5:1:1/2 Good gritty sand, (or plastering/rendering sand) cement, lime, in two coats, scratch first coat, no pva just well dampened walls. Sika Bond SBR+ Waterproof Bonding Agent and Mortar Admixture - 25L (6) £99. For Fixing, Sealing & Binding. Dow 791 Weatherproof Silicone Sealant Anthracite 310ml (44836) (42) compare. waterproof finish of say, a gloss paint, and finding that underneath is very soluble. 30 day money back guarantee. Sharp sand coarse and fine, lime and cement in 2 : 2: 1 :1 ratio for bottom coat ( scratch ) coat, with waterproofer. Product code: 139057. PAGE 1 OF 2. Covers up to 4m². Mr. Totally forgot as was so busy myself and only had a spare few days to do it. Cement mix and mortar mix are ideal for a large selection of tasks including pointing brickwork and stone, repairing concrete and render and filling holes or setting posts. • Apply in temperatures from +5°C to +25°C. Use on brick, concrete and stone. 95 Ex VAT. you can use it for rendering but it's much more difficult to rub up. £8. Order online at Screwfix.