Delivery. ssss64 New Member. Wire brush the exposed walls to be sure that there is no mould on the. Cover to control drying - maybe damp down occasionally too. Home Forums > Screwfix Community Forum > Other Trades Talk > waterproofing internal rendering Discussion in ' Other Trades Talk ' started by woodburner , May 16, 2006 . 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. Phil the Paver Screwfix Select. Ask a question. Jesus some ridiculous answers. Order Fabsil Universal Protector Water-Repellent Spray 400ml at Screwfix. com. With top trade brands available, offering great quality products, you'll be able to continue working even on the. Cement based coating for preventing water and damp penetration in walls and floors. com. 8/5. You can do it. Is either expanding foam, or white silicone OK in this situation (inside of course, render with waterproof mix on the outside)? Cold & Heat-Resistant. If you wait then water will get in behind it and more and more will fall off. Supplied in a graduated bucket. Covers approx. Buy Cement Mix at Screwfix. Low Odour & Solvented. 90. Product Type. + fill all gaps with new expanding foam. Sharp sand coarse and fine, lime and cement in 2 : 2: 1 :1 ratio for bottom coat ( scratch ) coat, with waterproofer. Adheres to damp masonry and is weather-resistant. £32. com. remove all dust. Dow 791 Weatherproof Silicone Sealant Anthracite 310ml (44836) (42) compare. Currently in Stock. 99. Will fill without depth limit and repair without formwork. The formula is solvent-free, making it more environmentally friendly by reducing pollution. These products are suitable for use on a variety of materials and can be applied by hand with minimal tools. UK call centre ready for your call 24/7. Product code: 252325. The pointing needs raking out 25mm deep, and re-pointing with a 4:1 sand & lime mix. It's like comparing a totally waterproof jacket costing £500 with a 'showerproof' jacket costing £25. FREE Click & Collect within 30 minutes. Choose this handy pre-mixed sand and cement render from Weber to cover brickwork, blockwork, concrete and other suitable surfaces. Goddo New Member. Extremely durable and will adhere to any substrate for filling and repairs with no depth limit. I intend on having the front of the wall rendered so it is important that it is sealed correctly. Truth be told I've already bought six 10L tubs of Sandtex and the stabilising solution, about over a year ago. Thanks. don't pva the wall either first coat with waterproofer in and second coat with waterproofer in also. BS 4887. PVA Sealers. K Rend). all the best. Suitable for 2. Home Forums > Screwfix Community Forum > Painters' Talk > Painting render. If it could be dug down far enough then a waterproof render might be enough hallbeck, Jan 24, 2007 #3. What depth should the battons for the scratch coat be? I was looking at 10-15 mm deep off the wall. 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. £3. 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. Available in different variants, it is important that the right basecoat paint is chosen for the job. com. Covers up to 4m². £ 52. Slow setting time makes it ideal for covering large areas in one application. Volume. Delivered by our approved supplier, Find out. Repels water on wood, brick, concrete, paving, asbestos and cement. i know its best to take the wall back to brick,but should i add a waterproofer to the floating coat (common sense says yes) as per external render,and if so what type? i have'nt been. Don't listen to jim he doesn't know that hes talking about you always 2 coat all render, bricks also. • Drying time of around three to four hours. Easy to shape and can be used on a variety of rough masonry surfaces including cement, concrete, breeze blocks, bricks and stones. Furthermore, the stabilising solution and PVA will both act to keep any moisture within the concrete, hence why you experiencing problems. With regards the tile adhesive Devils advocate is sound advice. Neosparks, May 30, 2006. View all: Mapei Shower Waterproofing Kits. 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. Use a bitumous tanking primer on the clean stone internally and throw gritty sand at the wet black jack for a key when dry. After application by brush, roller or spray; Stormdry provides breathable protection against rain penetration on exterior weather-facing walls. Phil. 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. May produce an allergic reaction. The range has been hand selected from established brands, who manufacture durable products. com. Depending on the ratio you used for waterproofer/water in your mix you should find that the render is virtually weatherproof. For Interior & Exterior Use. The bottom line is you require a waterproof wall; your solution of replacing the existing render with new would still require a waterproof paint, so go the whole hog and improve the insulation value of your wall, you will still get your new render be it 50mm further out, the bonus is you will save on your heating cost by reducing the heat loss. Insulates and protects wiring. Order Bostik General Purpose Mortar Grey 5kg at Screwfix. You capture lots of potential issues in one go, including new ties and new DPC, and probably the opportunity for some insulation. Sharp sand coarse and fine, lime and cement in 2 : 2: 1 :1 ratio for bottom coat ( scratch ) coat, with waterproofer. Stops freeze thaw damage. I know when we do the top coat it's gonna suck the moisture out like crazy. View all: Thompsons Water Seal. 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. £21. Sika Waterproof Coating Grey 5kg (83502) (67) compare. £ 14. Use plasticiser on both coats. setting manholes and repairing rendering and floor screeds. Is either expanding foam, or white silicone OK in this situation (inside of course, render with waterproof mix on the. Screwfix Community Forum. View all: No Nonsense Cement Mix. 1:20 rather than the more dilute 1:40 option. Can I tile onto render that has been made up with plastering sand and Sika1 waterproofer or should I plaster then tile? It is a process that helps make an object or structure waterproof or water-resistant, meaning it remains relatively unaffected by water. Free next day delivery available. Additional information. UK call centre ready for your call 24/7. 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. Screwfix customers rate this product 4. £12. p) may be an overkill but this is how <u>PROPER</u> tanking should be done and hey better overkill now than taking it. com. View all: Bostik Specialist Paints. This is called Feeze-Thaw action, which allows more water in, gradually. View all: Bostik Cement Mix. £8. , Apr 8, 2005 #2. £21. The old one is of crumbling brick and an (equally crumbling) smooth cement render. Ricky Johnson New Member. 45 Inc Vat. High performance waterproof treatment for exterior porous surfaces. 5mm thick maybe more on old uneven walls it has a waterproof addative in the mix. 100% Polyethylene Construction. #2. VAT. Bonding is not a good idea on external walls, it attracts water to it. The rendering is falling off because it is dead and no longer adheres to the surface of the wall. 96 per L . Daveukleics Member. For plinth probably be best to apply in 2 or 3 coats and pretty stong mix with waterproofer 3 sand 1 cement. 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. 1. 1-2hrs Approximate Setting Time. £7. 400 ml. Hi there, I need to find a suitable, waterproof render for a wetroom. Home Forums > Screwfix Community Forum > Builders' Talk > Rendering. Thistle One Coat Plaster 7. The 2nd. This Everbuild 402 Water Seal is a sealant that stops water wear on brickwork, stone masonry, concrete, pebbledash and other exterior walls. Screwfix customers rate this product 4. 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. I know this is not the best route to go in waterproofing a wall normally. Nail straight pieces of timber vertically & horizontally as required to external corners, window & door reveals. Fast-Drying. weakening its bond with the brickwork/render. The real question is is galvinised mesh ok. Im an old skool plasterer ( 34 years old ) And when i am rendering i use sand,cement and waterproofer/feb. TDav Member. com. 54/L quantity Collection Set Store. There's render up to about one metre all the way around the room, then its a 'board & dab' job up to the ceiling. blertsville, Jul 4, 2011. Stormdry Masonry Protection Cream is a colorless waterproofing cream for application to brick, stone, mortar, render and masonry. 1. Contains enough to waterproof a standard sized shower. A friend has given me some acrylic render (premixed tubs 25kg) which is a topcoat, and more than enough to do the job. 54 Inc VAT. 49Inc Vat. Once the wall is cleaned off treat it with an external sealer diluted to 2 parts sealer to 1 part water and mix thoroughly. You could have asked the plasterer to add a waterproofer to the render mix, but it's obviously too late now. poolthetool is spot on. Just soak the walls with a hose pipe scratch with a mix of 4:1 plastering sand : opc and float with 5:1:1 plastering sand : opc : lime, with waterproofer dosed in your butt. Creates smooth, easy to work with mortar. It sets to a rock-hard finish and can be overcoated in 24 hours. Pieces in Pack/Case. 49Inc Vat. Done a good job apart from i didn't put waterproofer in. But overmix using Fairey and the mix becomes a foamy mass of bubbles with very limited final strength. For Interior & Exterior Use. Good Luck. 1/ clean all walls of loose material. The fine aggregates are suspended in a unique. Best chech out the additive that has been used with the manufacturer. The rest of the garage walls are rendered and painted and I would like to know if I can render over the blocks. Most if not all are painted with. Good luck. 8m)above newly-fitted french doors to render. Waterproof PVA. Time is of the essence as access is via scaffold in my neighbor's yard and they want it gone. £49. Hundreds of stores nationwide. I don't trust my builder and although he assured me he put waterproof additives within the render I do not believe him. Most external decorative renders are painted, most have a combined waterproofer and plasticiser addidive in last coat. Mr. Morning all, I'm looking to render 3 garden walls, all made from 7. Volume. 310 ml. 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. Low toxicity. AC50 Trade Acoustic Adhesive & Sealant 900ml. Water Seal. It's all more controllable, and the 'plaster' ain't setting before your very eyes sending you into a blind panic. A couple of potential problems come to mind; concrete on a stud wall will almost certainly crack and fracture over time - I think. Click & Collect in as little as a minute. 99 Inc Vat. All walls were PVAed before rendering. £ 14. Sets in 20 minutes. But i have a job to do, and i am considerong using sbr bond on it first, as im always interested in new methods. Screwfix Community Forum. 2nd coat (floating coat) 4:1 sharp sand with waterproofer as above etc. I would add some waterproofer as a matter of routine. qwas123 Screwfix Select. Frame sealant is flexible and designed to withstand UV, weather and water exposure. 1. 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. 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. For picking up 1" use two coats of 1/2" each. 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. #2. Render Waterproofer. put your water in the mixer and then add a shovel of lime ,let it mix up for a minute and add 6 shovels of sand, half a bag of extra special cement and another 6 shovels of sand. 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. 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. Sikagard Facade makes walls and. com. Discussion in 'Builders' Talk' started by pete12, Jan 26, 2006. I’m leaning more towards K rend, as it’s silicone and. drill driver, Jun 21, 2005. £9. Order online today. I'm putting a corner shower into the bottom floor (concrete pad) of my house. Permaproof Waterproofer - Render Additive 5L. Should be ok to overpaint SBR with masonry paint. Use a waterproofer additive. Mr. IKOpro Synthaprufe Trade is easy to apply and provides damp proofing for concrete floors, foundations and masonry walls below, at or above ground level. Render question. PVA sealer is an extremely versatile, odourless, waterproof and non-toxic adhesive that is suitable for a multitude of tasks and requirements. View all: Sika Waterproof Sealants. My sister had her coal cellar done last year, and the guy used Sika 1, then rendered and plastered over it. Waterproofer in Render? Discussion in 'Builders' Talk' started by TDav, Sep 9, 2018. Render is max 10-15mm thick. MyPetFrog likes this. Weber One Coat Base Render 25kg. 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. After application by brush, roller or spray; Stormdry provides breathable protection against rain penetration on exterior weather-facing walls. Building a stud wall with a damp-proof membrane and insulating it. Go all over it and knock off the loose stuff. Not available for delivery. Fillers and Putty are used to fill or seal holes, cracks, or gaps prior to further decorating. Most external decorative renders are painted, most have a combined waterproofer and plasticiser addidive in last coat. Click & Collect. Overcoat with any. Ka Tanking Slurry Waterproofing Solution Grey 25kg. This process is best carried out using a pumping system and water fed pole with a brush attachment. I know when we do the top coat it's gonna suck the moisture out like crazy. #2. Render, Bricklaying and Floor Screeds. £8. Good shout? Also, not location of air bricks. The fine aggregates are suspended in a unique waterproof polymer to ensure easy application by roller or brush. Fixing sheets with tile adhesive, step 1. B&L, Choose one or the other. Light grey colour when dry. Overcoat 48-72 hours after application with any. Pieces in Pack/Case. 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. 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. com. With 10mm for the scratch coat and 8mm for the top coat. FREE next day delivery available, free collection in 1 minute. Need some professional advice on waterproofing my 3ft garden flowerbed retaining wall. damp down the area your about to work on to get rid of the dust. Volume. 99Inc Vat. Garage, garden, whatever. 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. Key products in the Bostik waterproofing range include: Flexacryl - a flexible, single coat compound for immediate waterproofing over most conventional roofing substrates. View all: Bostik Cement Mix. Water & Weather-Resistant. too much suction 4:1 will do you. The the final coat - 5 sand 1 cement NO WATERPROOFER just feb. Buy Cement Mix at Screwfix. 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. com. My plan is: 1) Cut back the render from the ground. Hi handy 007 1/2. Free returns. e. Product code: 139057. Â, Dec 1, 2007. Extra Rapid Cement is supplied in weatherproof and tear-resistant plastic bags. A. £45. Victor Lek Member. • Air entraining plasticiser • Prevents shrinking and cracking during curing • Water reducing • Chloride freeMortar plasticiser for stronger, easier to use brick and block-laying mortar. Login to save for later. Coverage: Approximately, 1 litre of SBR per sq metre at. Adheres to damp masonry and is weather-resistant. Bostik Concrete Sealer 5L. The old injection attempt has not worked, and neither has the inside attempt to render to 1m ht. Rake out the brickwork joints (say 5mm) to give the render something to 'hang on' to. If the wall is wet, not sure trapping the damp in the wall in under new. 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. Ideal for Use in Basements/Cellars but may also be Used as an External Coating for Concrete, Brick, Block & Bonded Renders. ALlow to dry for 4 or 5 days and then finish with a render of 6:1:1 rendering sand:cement:lime. 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. Low Odour & Solvented. We are ready for your call 24/7. Order online at Screwfix. Click & Collect. Order Bostik Waterproof Cement Grey 10kg at Screwfix. I have seen many threads about lime / no lime and whether you should waterproof on the scratch coat / finish coat etc etc. Weather-Resistant. Screwfix customers rate this product 4. 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 (insisted upon by the local councils conservation officer. 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. Easy returns, with 30 day money back guarantee. 49 Inc Vat. Ideal for emergency repairs, filling and patching. You can use this all-in-one primer and sealer to form a waterproof layer on outdoor surfaces such as concrete, lightweight. If you do not want to change the appearance of these walls then use a masonry waterproofer (two coats). Delivery 7 days a week 60 days free credit available. If you arent going to paint over it then put the water proofing agent in the top coat. For easy application Tarmac One Coat Renders contain polymers. Latest Offers At Screwfix. The process involves using a detergent to chemically clean the render using next to no pressure at all. waterproofing paint. DIYDave22 New Member. I'm quite a confident diy'er and wanting to try rendering a garden wall for the first time. For extra certainty use a render bonding agent such as Sika Rendagrip as a priming coat. 202 Integral Liquid Waterproofer is a liquid additive that provides long term water protection to mortar, concrete and rendering. 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). The front apex has often shown signs of water ingress as the mortar lines underneath are often visible after heavy rain. Apply with Brush or Roller. The proceedure is:-. Hundreds of stores Nationwide. Delivery. 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. The PVA glue can be dilated up to 5:1 with water for maximum use. the walls are new, 3 weeks old. today he's applying top coat with no waterproofer. Forms a transparent, waterproof barrier. If you bought the paint you can get a refund on it. Click & Collect. Advice on mix varies. FREE next. It is all studded then waterproof membrane & has expanded mesh over it and then its rendered. Not available for delivery. 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. 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. 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). (£5. and the level of the intended patio is a brick above the existing damp course in that specific wall. 3N dense concrete blocks. slapiton New Member. com. Many thanks!The problem here, is that the render will be 'attacked from behind' by damp from within the beds - unless you're provided adequate drainage for the trapped water in the beds. Screwfix Community Forum. He rendered approx two square mtres at a time before applying dash. £2. For use on solid substrates such as brickwork, blockwork and concrete, in moderate exposure conditions. shazauk New Member. Order online at Screwfix. you can use it for rendering but it's much more difficult to rub up. When diluted with water it produces a gauging solution for improved adhesion, workability and waterproofing of mortars and cementitious mixes. Are there any issues with MDB's - i know thermalites are a pig but are these any easier?you will need to hack off the external render and re-render with sika No. ★★★★★ ★★★★★. (£1. I have been trying to use sand and cement with waterproofer (everlast) to level it out but unsure if I'm doing it right. Apply the render with a steel plastering trowel and scooping it from a plasterers hawk. £39. There are various types for different applications, including quick single coat options. It failed in one area, and cracked off the wall. These products enable a way to effectively aid in water removal as well as keeping other area’s watertight. Handyandy - really Mr. I've attached some images. 99 Inc Vat. Can anyone give me advice on rendering over Medium Density Blocks for an external garage. unfortunately came home yesterday and all covered in scratch coat with no waterproofer. Screwfix Community Forum. 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. There is a white crystal deposit under left on the exposed render. unfortunately came home yesterday and all covered in scratch coat with no waterproofer. 4/immediately the last coat is on and while still wet, blind with sand. £9. 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. Most if not all are painted with mansonry paint, (Specialist applications excepted, eg. Home Tags > waterproofer. 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. Product information. £ 24. Two thin render coats. £9. Primer Not Required. 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. Free returns. 14th edition, Oct 12, 2017 #1.