Bostik Concrete Sealer 5L. It has many uses, and is suitable for most porous. Simple to use, just mix with water. Screwfix Community Forum. Totally forgot as was so busy myself and only had a spare few days to do it. Click & Collect. Paint it on and when its dry, do it again, as the wall has sucked all the moisture from the render that you had put on earlier and that is why it's 'crumbly'. 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. Hello. 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. General purpose, solvent-based. Seeking a bit of advice, been waiting for my plasterer to come and do my external rendering. Not available for delivery. BEfore dry (as the instructions suggest), I was then going to render to approx 10mm with a 5:1 rendering sand:cement mix with a waterproofed within. 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. Phil the Paver Screwfix Select. Buy Jointing Tape at Screwfix. com. 5/1 sand & cement if the house is that old i would add a waterproofer too. Contact the team today by calling 0161 509 9009 or emailing info@emperorpaint. The wall is not tanked with any waterproof membrane. £3. Shapeable to Repair Without Formwork. Waterproofer in Render? Discussion in 'Builders' Talk' started by TDav, Sep 9, 2018. Any advice would be greatly received, we dont want to knock it down. External wall is rendered. Bostik 1kg Cementone Colours for Cement - Buff (47) £9. 99Inc Vat. Seeking a bit of advice, been waiting for my plasterer to come and do my external rendering. 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. 3/when dry, three coats bitumen. 6/5. Add for Delivery. Screwfix Community Forum. Substrates which are highly absorbent or gypsum must be pre-treated with Primer G (usually diluted with water at a ratio of 1:1 or 1:2 to ensure thorough penetration). Hi there, I need to find a suitable, waterproof render for a wetroom. 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. . 1. Render up to (or very slightly below) the damp course, finishing with a 25° slope down and outwards from the dpc. I have used a slurry coat first of. But it has no brick exterior wall. This would be better off in plastering forum. 8. hi what is the best mix ratio for rendering internal wall . 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. £9. We are ready for your call 24/7. Its a painted concrete block wall, about 60m by 2m. Can be brushed or spray applied. Touch-Dry in 6 Hours, Fully Dry in 24 Hours. They have for example render products which are waterproof, yet breathable. #2. ★★★★★ ★★★★★. Cementone Freeflo Plasticiser is a retarding waterproofer and plasticiser. Neville the tap dancing gibbon, Sep 2, 2006. First of all you need to get the mix right first coat needs to be 4-1-1, 4 sand 1 cement and 1 lime and 1 cup of waterproofer. From waterproof adhesive to glass adhesive, it is important to choose the right glue for the job. com. 4 use mechanical fixings to fix this system to the wall. Add 1 cup of a waterproofing render mix per bucket full of water you mix. Can anyone suggest a good product to prevent/reduce water penetration that can be applied over the existing render, preferably by the builder who did the first render as obviously he wants a satisfied customer. too much suction 4:1 will do you. Buy Cement Mix at Screwfix. Give them a good scrub or pressure wash and tidy up the pointing. This time, its butting up against 12mm plasterboard (painted) which was dabbed directly to the brick (no render). all external work is sand and cement render and is a two coat process the frirst coat applied is called a scratch coat and is about 9. 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. The waterproofs range offers you a selection of colours and sizes to suit your needs while keeping you dry throughout your working day. Sika 1 Waterproofer is an aqueous solution containing complex colloidal silicates. Repels water on wood, brick, concrete, paving, asbestos and cement. Additional information. DIYDave22 New Member. Ask a question. I intend on having the front of the wall rendered so it is important that it is sealed correctly. cautious New Member. Option No. This process is best carried out using a pumping system and water fed pole with a brush attachment. Sanitary Fixings Kits. Choose this handy pre-mixed sand and cement render from Weber to cover brickwork, blockwork, concrete and other suitable surfaces. Â New Member. Choose from rapid or fast set cement for small commercial or domestic jobs. Screwfix Community Forum. Need to paint render which was applied about 4 years ago apparently with waterproofing element included. 5mm plasterboard to the wall, and then skim. 2. 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. Stormdry Masonry Protection Cream is a colorless waterproofing cream for application to brick, stone, mortar, render and masonry. Softwashing is the best way of cleaning your render. This is the only part on the whole house which shows this and I belive I. There are only three walls as it backs on to to a neighbours shed. DIYDave22 New Member. It produces a superior. SBR modified render will probebly be good enough soverine chemicals also do a product called K11 I think never used it but told by one who had it worked a treat,Otherwise, admixes can give some increased protection against water ingress for external render, or try a cement based render for the inside bay, which should keep water at bay moreso than plaster. FREE Click & Collect within 30 minutes. Daveukleics Member. (£5. 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. FREE next day delivery available, free collection in 1 minute. Read more. Low Odour & Solvented. My plan is: 1) Cut back the render from the ground. Our team of experts are on hand to help you at every step of the process. Discussion in 'Builders' Talk' started by Victor Lek, May 24, 2022. Brick waterproofer to help prevent damp on bricks & masonry. I added Sika MaxMix concentrated integral waterproofer, but not sure I used enough as I added it to the gauging water and not the weight of the mix and the sand was damp. Product Type. PVA is a water-insoluble resin which is typically white at the point of application, but dries colourless and has a high bonding strength. dougalhouse Member. Buy Roof Repair Products at Screwfix. From what I’ve read on this very helpful forum, it’s a water/salt problem. You can use this all-in-one primer and sealer to form a waterproof layer on outdoor surfaces such as concrete, lightweight. Rendering of chimney. Once Stormdry has been applied to the wall surface in a single coat and will permeate deeply before curing to form a. Went on white. Screwfix Community Forum. 1. Ideal for emergency repairs, filling and patching. It is all studded then waterproof membrane & has expanded mesh over it and then its rendered. 99 Inc Vat. The fine aggregates are suspended in a unique. Total Product Weight. Sika Proof Liquid Waterproofer 5L £7. Im asking for some advice on the best way to repair this. INNER WORLD DESIGN & BUILD LIMITED. I intend on having the front of the wall rendered so it is important that it is sealed correctly. When diluted with water it produces a gauging solution for improved adhesion, workability and waterproofing of mortars and cementitious mixes. Extremely durable and will adhere to any substrate for filling and repairs with no depth limit. Screwfix Community Forum. I am also used 3:1 evermix plasticizer / waterproofer / retardant in the mix towards a strong ratio. 99 Inc Vat. Click and collect in as little as 1 minute. 202 Integral Liquid Waterproofer is a liquid additive that provides long term water protection to mortar, concrete and rendering. Screwfix Community Forum. rogerk101 Screwfix Select. Screwfix customers rate this product 4. Preparation of the surface to be painted with gloss. Apply directly to damp surfaces. Render mix. he says his shower has been leaking against the wall to which it is mounted. today he's applying top coat with no waterproofer. 5 kg. There is a white crystal deposit under left on the exposed render. Mix approximately 4 to 5 litres of water per 25kg bag using an electrically driven mixer until you achieve a workable consistency. No waterproofer in render scratch coat. Hi handy 007 1/2. common sense tells you that this system will go nowhere and it wont. Screwfix - Rapid-setting waterproof cement. £21. Product information. com. Water Seal. Crack & Frost-Resistant. Product code: 252325. 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. 99Inc Vat. Provides superb weather protection for bricks, mortar and concrete. This not painted at the time as suspected water ingress problem however this issue now resolved. #2. Single application waterproofing compound for emergency repair and general maintenance of most roof types. My builder is advising to render and d&d, but this seems like more work to me for no real reason. 1st coat scratch 1:1:4 (OPC:lime:sand), 2nd coat 1:1:5. Wet room Kits consists of a mix of products which are needed when creating an open plan showering area. VAT £15. KIAB, Sep 18, 2015. Thanks. I understand that the waterproofer will do what it says on the tin, but only if in the first coat and then covered by another coat of render. (76 products) Aggregates and Chemicals are the components of a composite material which will resist stress providing a bulk to the composite material. 90. Hi Guys. Light Grey. 400 ml. However on the upside the materials that are available mean that working with sand and cement with added lime and waterproofer (for the record) and the ability to ashlar, and form all manner of quoins and window reveals/bands etc take far more skill than the average. For Cement Based Mixes. £ 28. 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. • Air entraining plasticiser • Prevents shrinking and cracking during curing • Water reducing • Chloride freeMortar plasticiser for stronger, easier to use brick and block-laying mortar. Designed for use in fully. Apply the render with a steel plastering trowel and scooping it from a plasterers hawk. Fast-setting, polymer-enhanced, cement-based repair mortar. Discussion in ' Builders' Talk ' started by Fussy Spark, Dec 27, 2020 . com. Waterproof PVA. At certain points the garden is upto a foot higher than. It Is single skinned and with render onto boards which were lined with fibreglass mesh. Choose from top trade brands. For easy application Tarmac One Coat Renders contain polymers. Buy online & collect in store in as little as 1 minute. 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. Less water in your mix, by making sure the plas does its intended job gives a lighter easier to spread render and will also float much earlier and will also rule off with ease which means it will hardly even need a float. Discussion in 'Builders' Talk' started by Gary hunt, Oct 23, 2016. Delivery. You use a wire scratcher to form a key in this while its wet to form a good key for your second coat. Is Artex Render Waterproof? Discussion in 'Builders' Talk' started by DIYDave22, Nov 8, 2023 at 5:34 PM. Good Luck. KIAB Super Member. For Interior & Exterior Use. Screwfix customers rate this product 4. 250 cement board. With regards the tile adhesive Devils advocate is sound advice. Rub up the render with a plastic or wood float ( an off-cut of 2" x 4" will work as a float trowel) and tile straight on to it. The original poster asked if there was any reason he should not add lime to a mix with a waterproofing plasticiser additive and not as you are labouring under the impression of, a waterproofer anda plasticiser, nor any. Click & Collect. (former damp problems)And install 22mm insulated plasterboard over that. com. 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. This sealant is suitable for for repelling water on porous surfaces. right quick little question, got to render gable end of a house. The pointing needs raking out 25mm deep, and re-pointing with a 4:1 sand & lime mix. The shed is 5m x 2m high & has 2 end walls about a metre wide. Click & Collect. Acrylic frame sealant is ideal for internal use to fill. Stops freeze thaw damage. Add for Delivery. Ask a question. Screwfix - Rapid-setting waterproof cement. 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. The PVA glue can be dilated up to 5:1 with water for maximum use. 2) Fit a bellcast. In terms of damage to your external walls, if any water that has gotten into your brickwork freezes, it will expand outwards within the brick, creating cracks (or more cracks) in your brickwork. Many rubble stone buildings in South Gloucestershire were originally lime-rendered, and/or lime-washed and render is a distinctive local feature which should be retained. 8m)above newly-fitted french doors to render. When applied, Febtank Super forms crystals preventing water ingress and provides an extremely durable waterproof coating. Sika Proof improves the impermeability and absorption. We encourage you to debate the topics and issues of the day in a friendly manner, whether related to trade/DIY or not. View all: Mapei Shower Waterproofing Kits. Once the wall is cleaned off treat it with an external sealer diluted to 2 parts sealer to 1 part water and mix thoroughly. Home Forums > Screwfix Community Forum > Builders' Talk > Help with Rendering please Discussion in ' Builders' Talk ' started by mikethesmoke , Apr 26, 2009 . Air entraining – will not “flatten” the mix. Come back the next day if you like, and see what sort of waterfall you have running down the back of the wall. Scratch coat is 1 part cement, 1 hydrated lime, 5 plastering sand, with fibreglass mesh embedded. Create a smooth base. Covers up to 4m². Light grey colour when dry. I know this is not the best route to go in waterproofing a wall normally. 25 Inc Vat. B. Forms a transparent, waterproof barrier. I don't see why not to both questions. Creates smooth, easy to work with mortar. It is a solution for nothing. Designed to be used for plasterboard internal corners. View all:. com. Most can be used on all common surfaces, and as a decorative trim or door paint. The pointing needs raking out 25mm deep, and re-pointing with a 4:1 sand & lime mix. Discussion in 'Painters' Talk' started by Joelfc89uk, May 24, 2018. 99. Light Grey. 25 Year Waterproofing from a Single Coat . 80/Ltr)I am building an outdoor kitchen for gas bbq etc. Ideal for Use in Basements/Cellars but may also be Used as an External Coating for Concrete, Brick, Block & Bonded Renders. Often soft in texture, when applied these substances harden. Login to save for later. You shouldn't use PVA for external render however they do make an external grade one but this isn't necessary. One Coat Render is a high quality, pre-blended formulation, for single coat application reducing total drying time. The render around the mock Tudor beams on the outside of a property I am looking at is cracked. ★★★★★ ★★★★★. Im an old skool plasterer ( 34 years old ) And when i am rendering i use sand,cement and waterproofer/feb. only one left wet. Page 1 of 2 1 2 Next > Gary hunt New Member. Depending on the ratio you used for waterproofer/water in your mix you should find that the render is virtually weatherproof. I've heard bad things about Sika, re: not being suitable for moxing in a cement mixer: online at Screwfix. £8. Includes 2 Countersunk Screw Holes for Workbench Fixing. And all this after the walls were skimmed and painted. 99Inc Vat. BS 4887. the rendering is the easy bit. i now have to patch it up, about a 2 inch strip. Extremely durable and will adhere to any substrate for filling and repairs with no depth limit. Suitable for brush application only. It incorporates a Polymer bonding aid allowing the results. Sika Bond SBR+ Waterproof Bonding Agent and Mortar Admixture - 25L (6) £99. Ready to Use. Will fill without depth limit and repair without formwork. By getting the finish coat on within 8. 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. Soudal Repair Express Plaster Filler White 250ml (125RG) (4) compare. The. 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. This sealant is suitable for for repelling water on porous surfaces. com. Delivery. 4) Remove the damp plasterboard internally, remove the wet sand, waterproof paint the brick internally and. Phil the Paver, Nov 22, 2014. 1-2hrs Approximate Setting Time. 5 apply new finish. Mr. In fact, cracks are still appearing now, nearly a year on. Touch-Dry in 6 Hours, Fully Dry in 24 Hours. But overmix using Fairey and the mix becomes a foamy mass of bubbles with very limited final strength. £3. 99. Using 4 :1 first coat and 6:1 second with waterproofer. 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. £2. 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. (the actual water drainage path, which looks like its made of half a sewer pipe is actually in good condition, so its only the. For Interior & Exterior Use. Applied waterproof PVA. Do what the gardener should have done. Done a good job apart from i didn't put waterproofer in. 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. Suitable for brush application only. Order online at Screwfix. DIY_Has123 Active Member. Covers up to 4m². 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. This coat should be applied while the first coat is still. Screwfix Community Forum. Product code. Weather-Resistant. B) To seal around the bathtub - I am planning on using the Schluter Kerdi TS Bath and Shower Sealing Kit. Left it a day, then filled with water. . Order online at Screwfix. Just. the case is, it is a kitchen area, i have plastered 4 walls, 3 dried completely. Home Forums > Screwfix Community Forum > Builders' Talk > Rendering. High Bond Strength. OR 5:1 Good gritty sand, (or as above) cement and a bit of plastisizer in first coat (again scratched) then Rendamix in. Rapid-setting waterproof cement. Hi, I wonder if anyone can help/ offer some advice as we’re at our wits end. One idea was maybe to do a slurry of waterproofer and render and paint in on with a brush and once that becomes tacky, to add the 1st coat / scratch coat? Not sure what product to use though for waterproofing purpose, pls advise! Cheers. #2. I would add some waterproofer as a matter of routine. But i have a job to do, and i am considerong using sbr bond on it first, as im always interested in new methods. £ 28. . 100% Polyethylene Construction. Damp walls can cause salt deposits to appear – these can blow your plaster. 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. 1. 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. Suitable Application. That's not to say lets seal the moisture in the bricks. My sister had her coal cellar done last year, and the guy used Sika 1, then rendered and plastered over it. Provides perfect adhesion without the use of a primer, even on damp substrates. I know when we do the top coat it's gonna suck the moisture out like crazy. Covers Approx. At present it’s a thin coat of sand and cement mix with metal beading that’s rusty, on top of Accrington brick. 1. 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. 3) waterproof paint the bottom exposed brick. £179. Suitable for a Variety of Applications. I have a small area (2. Fillers and Putty are used to fill or seal holes, cracks, or gaps prior to further decorating. com. 7/5. 3. EVeryone seems to have their own opinion and hardly. FInish with horizontal scratches for a key. This waterproofer penetrates deep into the brickwork whilst still allowing the surface to breathe. 80. Blue Circle Hydralime Hydrated Lime 25kg. Wall fillers and flexible fillers create a clean smooth and professional finish. For Indoor Use. today he's applying top coat with no waterproofer. FREE next day delivery available, free. + fill all gaps with new expanding foam.