Once dry then add a cup full per mix of neat sealer in the water. Hi handy 007 1/2. Use plasticiser on both coats. Waterproof PVA. cautious New Member. 8/5. Water & Weather-Resistant. Single application waterproofing compound for emergency repair and general maintenance of most roof types. The PVA glue can be dilated up to 5:1 with water for maximum use. £8. 1:20 rather than the more dilute 1:40 option. Mr. The fact that it's a retaining wall means that it's going to be damp, almost by definition. Add for Delivery. Then sharp sand fine, lime, cement in 6: 1: 1 ratio as top coat. 96 per L . 30 day money back guarantee. Wire brush the exposed walls to be sure that there is no mould on the. Home Forums > Screwfix Community Forum > Builders' Talk > Waterproofing. . The pointing needs raking out 25mm deep, and re-pointing with a 4:1 sand & lime mix. 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. I'm not expecting a smooth 'craftsmans' finish as other areas of render have a rough finish but look perfectly acceptable once painted. 99 Inc Vat. 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). By getting the finish coat on within 8. (£5. Order online at Screwfix. Discussion in 'Builders' Talk' started by Bungditin. My sister had her coal cellar done last year, and the guy used Sika 1, then rendered and plastered over it. 'A' way to do it is this. Febtank Super is a high performance tanking slurry for masonry and concrete. 1. 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. Light grey colour when dry. Buy Roof Repair Products at Screwfix. I guess the best way to render the bell bead is in two parts. High performance waterproof treatment for exterior. You capture lots of potential issues in one go, including new ties and new DPC, and probably the opportunity for some insulation. £9. Use a coat of 2:1 sand cement with waterproofer followed by a 3:1 and then a 4:1 (all with w. Buy Resins at Screwfix. I don't trust my builder and although he assured me he put waterproof additives within the render I do not believe him. Interior Wood Paints. 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. The formula is solvent-free, making it more environmentally friendly by reducing pollution. Extra grip, render bonding agent that contains a fine aggregate to provide an improved mechanical key before applying render on external concrete, blockwork or brick. It’s in such bad shape that you can push your finger quite easily into it and it comes away like wet sand. This is called Feeze-Thaw action, which allows more water in, gradually. Considering that you nickpuff seem to be the only person that is unable to decipher plain English I will help you out a little. Coverage per Litre: 6m²/Ltr. Heat-Resistant. I want a rustic finish which is why I'm not going for tiles, and ideally would like something like lime render but would like to know if their are any waterproof plasters / cement or whether you can use what you like but simply give it 2/3 coats of a suitable varnish. View all: Thompsons Water Seal. com. weakening its bond with the brickwork/render. Aggregates & Chemicals. Left it a day, then filled with water. He came back and redid that area, and it leaks there worse than ever - it's just like a sponge. Pieces in Pack/Case. This is especially important if you apply a thick traditional multi-coat plaster. 99 Inc Vat. Product Type. This time, its butting up against 12mm plasterboard (painted) which was dabbed directly to the brick (no render). . £ 14. Can anyone tell me which is the best silicon based waterproofer they have used for waterproofing an exterior stone wall. Everbody have different ideas for the perfect render mix, I usually do 1st coat (scratch coat) 3:1 sharp sand with waterproofer, 2nd coat (floating coat) 4:1 sharp sand with waterproofer. Sets in 20 minutes. Shapeable to Repair Without Formwork. After application by brush, roller or spray; Stormdry provides breathable protection against rain penetration on exterior weather-facing walls. Creates smooth, easy to work with mortar. Discussion in 'Builders' Talk' started by questioner, Jul 6. for a half bag mix in a small mixer add one cup full of waterproof and one cupful of placticiser to a bucket of water. Goddo New Member. 90min Approximate Setting Time. Grey. If you bought the paint you can get a refund on it. Scratch the coats with a scrating tool looks a bit like a large afro comb or make one with a bit of batten and some nails. Screwfix Community Forum. FREE Click & Collect within 30 minutes. It sets to a rock-hard finish and can be overcoated in 24 hours. PAGE 1 OF 2. £ 14. Currently in Stock. Order No Nonsense Waterproof PVA 5Ltr at Screwfix. If you don`t want waterproofer at least use a plasticiser or lime. Weberend One-Coat Base Render (OCR) is a versatile pre-blended single coat application render, ideal for rendering brickwork, blockwork and concrete. I’m doing the patio and the. Â, Dec 1, 2007. A waterproof render is more a damp proofer than a waterproofer. 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. It's like comparing a totally waterproof jacket costing £500 with a 'showerproof' jacket costing £25. Over 40,000 products. render SamBeevor96__ New Member Renovating an old cottage which has penetrating damp, looking to apply an internal sand and cement render adding thermoseal/waterproofer to stop the damp coming through. EVeryone seems to have their own opinion and hardly. Add for Delivery. For the coloured top finish you require you use coloured sand and not coloured cement. Click & Collect. common sense tells you that this system will go nowhere and it wont. 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. Over 40,000 products. It sets to a rock-hard finish and can be overcoated in 24 hours. He ended up really busy so we decided i'd. Product code. Can be applied onto a damp. Air entraining – will not “flatten” the mix. 41 Per unit £0. Reduces surface absorption. I will be using metal studs to make the framework and lining it in OSB3. 48. KIAB Super Member. 4:1 with morticiser for scratch you can float next day with 5:1:1 sand, cement, lime + waterproofer in water butt. View all: No Nonsense Cement Mix. Click & Collect. com. FREE next day delivery available, free. Should be ok to overpaint SBR with masonry paint. Dow 791 Weatherproof Silicone Sealant Anthracite 310ml (44836) (42) compare. Apply the render with a steel plastering trowel and scooping it from a plasterers hawk. Order Bostik General Purpose Mortar Grey 5kg at Screwfix. These kitchen areas can be improved by externally insulation, with either Cellotex or Kingspan, and then using metal lathing to render a good cement/lime roughcast to match the existing property. View all: Bostik Cement Mix. Extra grip, render bonding agent that contains a fine aggregate to provide an improved mechanical key before applying render on external. For External Use. Home Forums > Screwfix Community Forum > Builders' Talk > Rendering. com. ALlow to dry for 4 or 5 days and then finish with a render of 6:1:1 rendering sand:cement:lime. Buy 3 for £11 - View Offer. Apply with Brush or Roller. As well as offering protection, exterior wall paint improves the appearance of a property by brightening it up and bringing it back to life. 4m²/Ltr. com. Buy Cable Sleeving at Screwfix. 5 Ltr. He advised waterproof PVA. Contains enough to waterproof a standard sized shower. I intend to apply sandtex stabilising solution and then sandtex fine texture paint which say's it has a breathable waterproofer in it. Let it dry for a couple days. Bricks are non porous, that's why houses are made of them. 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. 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. 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. Includes 2 Countersunk Screw Holes for Workbench Fixing. Wall fillers and flexible fillers create a clean smooth and professional finish. Free returns. Out of stock. The fine aggregates are suspended in a unique waterproof polymer to ensure easy application by roller or brush. Cemenmt render will dmage the wall eventually - its not ok to do it. com. Total Product Weight. Write a review. VAT) Quick. FREE next day delivery available, free collection in 1 minute. External wall is rendered. Finishes are subject to high or low maintenance all of which are discussed at time of consultation. 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. 1/ clean all walls of loose material. The wall has a cavity with no insulation and about 150mm above the damp course. May produce an allergic reaction. Click & Collect. Odourless & Solvent-Free. RECOMMENDATIONS:Alchemy Plastering. Breathable masonry paint is essential for waterproofing your exterior bricks while allowing moisture to escape from inside your house. Been in exact same position 20 years ago, building control wasn't happy with the so called waterproof render on a small extension, I had to run a disc cutter along the line of the damp coarse and fill it with mastic. FREE next. Come back the next day if you like, and see what sort of waterfall you have running down the back of the wall. Good shout? Also, not location of air bricks. 100% Polyethylene Construction. Depending on the ratio you used for waterproofer/water in your mix you should find that the render is virtually weatherproof. £17. Preparation of the surface to be painted with gloss. KIAB Super Member. Click & Collect. Totally forgot as was so busy myself and only had a spare few days to do it. 99 Inc Vat. Sika Waterproof Coating Grey 5kg (83502) (67) compare. Overcoat 48-72 hours after application with any. Volume. Delivery Next day available. ★★★★★ ★★★★★. Waterproof a leaking roof. Suitable Application. My qustion is: Will I need to use a (waterproofing?) additive to the render mix, particularly for the inside surfaces of the drain. Product Type. 99 Inc Vat. I'm painting a house at the moment and the customer wants a more long term solution so I'm cutting away 4" of render either side of the corner. Choose from top trade brands. Weather-Resistant. VAT. After starting he informed me that. Scratch coat is 1 part cement, 1 hydrated lime, 5 plastering sand, with fibreglass mesh embedded. Is it okay to press on with the inside works (batten out, 25mm celotex and 12mm plasterboard) before the rendering is complete? The renderer is proposing to do a scratch coat and then a top coat with waterproofer mixed in, and then it will be painted with something like Dulux Weathershield. 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. Product code: 252325. The garage is being used as a semi heated workshop hence the insulation, but I don't forsee any great generation of moisture within. Not available for delivery. Most if not all are painted with mansonry paint, (Specialist applications excepted, eg. 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. Ready to Use. Scratch coat is 1 part cement, 1 hydrated lime, 5 plastering sand, with fibreglass mesh embedded. 74/kg quantity Collection Set Store. and the level of the intended patio is a brick above the existing damp course in that specific wall. Home Forums > Screwfix Community Forum > Builders' Talk > Help with Rendering please Discussion in ' Builders' Talk ' started by mikethesmoke , Apr 26, 2009 . 7/5. 1/5. Delivery. Never heard of the 4 weeks / mould thing before. Most traditional renders are applied in two coats; a base coat and a topcoat. Good Luck. 99 Inc Vat. Cementone Freeflo Plasticiser is a retarding waterproofer and plasticiser. i now have to patch it up, about a 2 inch strip. Most can be used on all common surfaces, and as a decorative trim or door paint. Product Type. My idea is to remove the lose render from around the window (as I have started to do already) + remove any old foam. 49Inc Vat. setting manholes and repairing rendering and floor screeds. 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. Float at 5:1:1 Builders sand : OPC : LIME with waterproofer in the water How does that sound? 2. PermaSEAL 3 Damp Proof Membrane Kit 10m². He came back and redid that area, and it leaks there worse than ever - it's just like a sponge. Or it could look like an unfinished wall (which, of course, it is ) I think it looks good in these photos. Ideal for use on swimming pools, water tanks, ponds, below ground concrete, as well as for render and floor screeds for water resistant applications. Screwfix Community Forum. We also don’t think it’s had waterproofing mixed in. 5 Ltr. Suitable for Water, Oils & Chemicals. Easy to shape and can be used on a variety of rough masonry surfaces including cement, concrete, breeze blocks, bricks and stones. Phil. the problem comes because one of the old walls has the damp course below of extension. Sanitary Fixings Kits. all the best. 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. Sika Waterproof Coating Grey 5kg (83502) (68) compare. Initially it was agreed that the old render would be removed and a new render put on the bricks. The earth is retained in the garden with another wall. 3/when dry, three coats bitumen. Provides a hard wearing, protective layer on wood, metal and cement. Can be brushed or spray applied. Overcoat with any. 90min Approximate Setting Time. What mortar mix, 3:1? ArthurFirstly internal walls do not need rendering with sand and cement but a base coat of plaster is used instead such as Bonding or Browning. Suitable for a Variety of Applications. That will last. When this is complete, lay the concrete floor with the membrane overlapping the tanking by a generous margine. The Sandtex Brickwork Waterproofer & Protector provides a clear waterproof protective layer for bare brickwork. Reduce cracking and shrinking when mortaring with this SBR bonding agent from Everbuild. 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. 99 Inc Vat. 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. £45. Sharp sand coarse and fine, lime and cement in 2 : 2: 1 :1 ratio for bottom coat ( scratch ) coat, with waterproofer. Product Details. apply the sand and cement to above 1/4 inch of the existing. This process is best carried out using a pumping system and water fed pole with a brush attachment. remove all dust. com. DIYDave22 New Member. 5 apply new finish. The real question is is galvinised mesh ok. Bostik Waterproof Cement Grey 10kg (58196) Bostik Waterproof Cement Grey 10kg. Ideal for Use in Basements/Cellars but may also be Used as an External Coating for Concrete, Brick, Block & Bonded Renders. Can anyone tell me which is the best silicon based waterproofer they have used for waterproofing an exterior stone wall. #9. com. 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. dj. blertsville, Jul 4, 2011. . Choose from top trade brands. 12-16m²/Ltr. Render - smooth finish. 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. 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. Home Forums > Screwfix Community Forum > Painters' Talk > Painting render. 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. Primer Not Required. 99 Inc Vat. Page 1 of 2 1 2 Next > Gary hunt New Member. These products enable a way to effectively aid in water removal as well as keeping other area’s watertight. The 2nd. Fine. 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. Hundreds of stores Nationwide. Screwfix Community Forum. 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. 5 apply new finish. He rendered approx two square mtres at a time before applying dash. £6. DIY_Has123, Feb 3, 2021. I know when we do the top coat it's gonna suck the moisture out like crazy. Apply directly to damp surfaces. I have waterproofer and unibond. Mix it at 5-1 sand - cement with waterproofer. Buy Cement Mix at Screwfix. This will depend on the surface of which it's being applied and the strength of hold required. Screwfix Community Forum. Suitable for ceramic, porcelain and non-moisture. The Bonding coat should not be allowed to dry before application of the render or plaster. • Apply in temperatures from +5°C to +25°C. Render should be fully dry after a few months,doubt they added a water proofer to render, then it will soak up then rain,& then need to dry again, endless cycle. Render mix. Water Seal. Stops freeze thaw damage. 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). I'm no pro on this, but have done a lot of research into it. (76 products) Aggregates and Chemicals are the components of a composite material which will resist stress providing a bulk to the composite material. There is a white crystal deposit under left on the exposed render. Sikagard Facade makes walls and. KIAB, Sep 18, 2015. 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%. Screwfix Community Forum. You would usually add waterproofer to the scratch coat (base coat), & again to final/floating coat (top coat). Dow 791 Weatherproof Silicone Sealant Anthracite 310ml (44836) (42) compare. Frame sealant is flexible and designed to withstand UV, weather and water exposure. Latest Offers At Screwfix. Developed to repair damaged masonry between brick and stonework. 310 ml. Sika Proof improves the impermeability and absorption. Delivery Out of stock for delivery. Any advice would be greatly received, we dont want to knock it down. The front apex has often shown signs of water ingress as the mortar lines underneath are often visible after heavy rain. Available in different variants, it is important that the right basecoat paint is chosen for the job. shazauk New Member. The rest of the garage walls are rendered and painted and I would like to know if I can render over the blocks. The wall has a cavity with no insulation and about 150mm above the damp course. I have a small area (2. PAGE 1 OF 2. Deme23 New Member. £8. Mr. This ready to use Sikagard facade from Sika is a water based impregnation emulsion. , Feb 26, 2008. com. . Designed for use in fully. #3. Ideal for emergency repairs, filling and patching. Stores are open 7 days a week. The paint has been fine until this very wet spring, when it started to bubble and peel in large random areas. You should have. Discussion in 'Builders' Talk' started by Gary hunt, Oct 23, 2016. Mix it strong say 3:1:1 or 3:1 plus plasticiser. High Bond Strength. Buy Plastering items from Screwfix. Rapid-setting waterproof cement. Forms a transparent, waterproof barrier. Can anyone give me advice on rendering over Medium Density Blocks for an external garage. Mr. 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. Delivery Next day available. 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). 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. Ideal for emergency repairs, filling and patching. For a clear coating over bricks to allow. Weber One Coat Base Render 25kg. Best chech out the additive that has been used with the manufacturer. 99Inc Vat. Light grey colour when dry. Hello. Is unibond OK 2. Will depend on the type of silicon, and will only work with oil based paint. 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. You could have asked the plasterer to add a waterproofer to the render mix, but it's obviously too late now. dougalhouse Member. Dried clear. Screwfix Community Forum. Cut back on the admix a little, mix it up stiffish then allow the drum turn for five minutes and let the admix do its stuff, the mix will reach a nice wet consistancy after a few minutes. Mould & Mildew-Resistant. 99 Inc Vat Click & Collect Not available for delivery Buy Bonding Agents at Screwfix. Prepare walls by straightening them out with a two coat render system and a waterproofer agent added to mix. co. the. Fill holes and cracks with ease, suitable for many applications. 8/5. Home Tags > rendering. Cement-based, rapid-setting flexible adhesive. Render is max 10-15mm thick. 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. Water vapour permeable. Try on a couple of places (bottom of wall more likely to have weak adhesion). 5. £30. gauge everything put the water in the mixer then add the lime to the. Bostik 1kg Cementone Colours for Cement - Buff (47) £9. Hang on, it's going white again. A.