It has many uses, and is suitable for most porous. Float at 5:1:1 Builders sand : OPC : LIME with waterproofer in the water How does that sound? 2. com. Order online at Screwfix. At certain points the garden is upto a foot higher than. Easy returns, with 30 day money back guarantee. Suitable Application. 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. My question is what do I need to do to the surface to prime/seal it before the top coat? I intend to finish off with a Dulux exterior weathershield paint. The old one is of crumbling brick and an (equally crumbling) smooth cement render. 5mm² Cables. I intend to apply sandtex stabilising solution and then sandtex fine texture paint which say's it has a breathable waterproofer in it. Volume. This Everbuild 402 Water Seal is a sealant that stops water wear on brickwork, stone masonry, concrete, pebbledash and other exterior walls. I have a small area (2. You might wonder why you need two (or more) coats. Can be used for rendering, roughcast, pebble dashing, harling and above ground waterproofing. 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. 96 per L . Free returns. I am after some advice if poss. Customer lives close to coast will the salt in the air have any impact on my. 49. Order online at Screwfix. This would improve the temperature somewhat, reduce any condensation and also allow the wall to breathe thanks to the studded membrane. Screwfix customers rate this product 4. Light Grey. 8/5. Show More. #2. With regards the tile adhesive Devils advocate is sound advice. Click & Collect. 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. 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. Grey. Available in a variety of options. Using a small grinder, cut out all loose chunks of render - & open all sketchy cracks. Login to save for later. Order Thompsons Drive Seal Black 5Ltr at Screwfix. Includes 2 Countersunk Screw Holes for Workbench Fixing. Run a hose against it. Will this be enough. £21. Easily secure a wide range of applications in place. The old injection attempt has not worked, and neither has the inside attempt to render to 1m ht. If you are in a bit of a wild area, then consider epoxy - two-pack - masonry paint. Quantity: FREE Click & Collect within 30 minutes. The process involves using a detergent to chemically clean the render using next to no pressure at all. BS 4887. 1 Preparing the substrate. 99 Inc Vat. Charlie Far!ey New Member. In my experience you can take of the damaged parts and patch in, but personally I would take it all off and start again, making sure that a good key is achieved in the scratch coat (1st coat of render). Blue Circle Hydralime Hydrated Lime 25kg. waterproofing paint. 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). You should have. £13. 99 Inc Vat. waterproof render. It is a solution for nothing. Ideal for use on swimming pools, water tanks, ponds, below ground concrete, as well as for render and floor screeds for water resistant applications. 5m x 0. Pieces in Pack/Case. 54 Inc VAT. 1. Read more. , Feb 26, 2008. Nail straight pieces of timber vertically & horizontally as required to external corners, window & door reveals. Step 6 – Apply First Coat of Render to Wall. Designed to be used for plasterboard internal corners. common sense tells you that this system will go nowhere and it wont. It failed in one area, and cracked off the wall. 400 ml. 5°C. Depending on the ratio you used for waterproofer/water in your mix you should find that the render is virtually weatherproof. There are many external finishes - Finedown (smooth as in photos), Tyrolean, Pebble dash etc. #9. it is a little tired in. £179. Suitable for Water, Oils & Chemicals. Order online at Screwfix. 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. 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. FREE next day delivery available, free collection in 1 minute. Most if not all are painted with. FREE next. The fact that it's a retaining wall means that it's going to be damp, almost by definition. com. co. If the wall is dry (unlikely this year!) lightly damp it without soaking it completely before applying the. £39. Easy to shape and can be used on a variety of rough masonry surfaces including cement, concrete, breeze blocks, bricks and stones. 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. £18. 1 remove lose stuff. It sets to a rock-hard finish and can be overcoated in 24 hours. 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. Extremely durable and will adhere to any substrate for filling and repairs with no depth limit. Still I`d be interested to hear other peoples approach. Page 1 of 2 1 2 Next > Thread Replastering around doorframe with very uneven brick walls. Sets in 20 minutes. Tarmac One Coat Renders can be applied with a trowel of float. 99 Inc Vat. As well as offering protection, exterior wall paint improves the appearance of a property by brightening it up and bringing it back to life. Also for repairing cracks and damaged stone edges. Extremely durable and will adhere to any substrate for filling and repairs with no depth limit. im rendering onto concrete blocks on the outside of my new shed/workshop. PVA sealer is an extremely versatile, odourless, waterproof and non-toxic adhesive that is suitable for a multitude of tasks and requirements. I would then like to render it. Is there anything I can do now. 'A' way to do it is this. Hazardous Product – Not available for Mail Order/ TCND outside of Mainland UK. Suitable for 127mm Wide Coving. Covers Approx. Tapes suitable for a range of materials stocked. the render has retarder/waterproofer in it. Order online at Screwfix. The rendering is falling off because it is dead and no longer adheres to the surface of the wall. PVA sealer is an extremely versatile, odourless, waterproof and non-toxic adhesive that is suitable for a multitude of tasks and requirements. . So it'll be damp from behind (penetrating damp) and damp from below (rising damp), so not much to be gained by. It sets to a rock-hard finish and can be overcoated in 24 hours. Walls are old super dense concrete blocks. Buy Cement Mix at Screwfix. You can use any Render bonding or gripping to prep & fix all render patches - use Polyurethane sealant for filling the recently opened cracks. Applying the board directly onto the membrane with thin adhesive and mushroom fixings. With regards the tile adhesive Devils advocate is. com. I intend to stipple a further slurry of Unibond, cement and sharp sand before I render the wall to make it suitable for applying tiles in the shower area. Use on brick, concrete and stone. Ideal for Use in Basements/Cellars but may also be Used as an External Coating for Concrete, Brick, Block & Bonded Renders. com. Screwfix Community Forum. The wall is hollow concrete block, backfilled with concrete and reinforced to some rather substantial footings. Bostik 1kg Cementone Colours for Cement - Buff (47) £9. Waterproofing Block Building. 5. Left it a day, then filled with water. Not available for delivery. Ideal for fixings in perforated brick, solid brick, concrete and aerated concrete. Â, Dec 1, 2007. Use it after clearing. Apply Water Seal directly onto damp surfaces to provide long lasting waterproof protection within hours. We stock Everbuild PVA, ideal for use as a contractors PVA due to its high strength. Light Grey. KIAB Super Member. €28. He advised waterproof PVA. The wall has been constructed out of 7n concrete breeze blocks and before i backfill i need to waterproof, it needs to be plant friendly. Screwfix customers rate this product 4. 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. Provides superb weather protection for bricks, mortar and concrete. com. com. Delivery 7 days a week 60 days free credit available. 250 cement board. 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. Adhesive can be manufactured from a range of substances, with each having different properties. Total Product Weight. Once the wall is cleaned off treat it with an external sealer diluted to 2 parts sealer to 1 part water and mix thoroughly. Screwfix Community Forum. 1. Discussion in 'Builders' Talk' started by Bungditin. Hazard safety codes: Xi, R36, R38, R52, R53. Ideal for locations such as basements and cellars or for external coating for concrete, brick, block and bonded renders. Then enjoy! 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. Silicone render and waterproofing for penetrating damp. 99 Inc Vat. Everbuild’s Black Jack paint is perfect for. Sometimes i use wire ( render lathe to all you young spreads ). Corrosion-Resistant. If you use an oil based paint, thin it 50/50 and use that as a cover coat. Screwfix - Rapid-setting waterproof cement. My sister had her coal cellar done last year, and the guy used Sika 1, then rendered and plastered over it. Dow 791 Weatherproof Silicone Sealant Anthracite 310ml (44836) (42) compare. This is your 'drip-tray' separating the above and below dpc areas. Click & Collect. 8/5. The render would or should have had a waterproofer added to the mix when rendered so it will be waterproof, as the render is new it is not necessary to apply a stabilising solution first, just use a hand brush to go over the surface to remove any dusty muck off the surface. 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). He uses plastering sand and cement mixed at a 3:1 ratio with waterproofer added, no lime or plastisiser. 1/ clean all walls of loose material. com. 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. Order Bostik SBR Admixture White 5Ltr at Screwfix. Screwfix customers rate this product 4. 14th edition, Oct 12, 2017 #1. Features include multi-pockets, adjustable designs and reflective tape so that you can be seen. chillimonster Screwfix Select. 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. normal bricks and most blocks, calls for a 1:1:6 mix for the scratch coat; cement, lime and sharp sand (3mm to fines). They do say that a suitable bonding agent could be applied prior to the render scratch coat. ie. Will adhere without primer even on slightly damp surfaces. Using colour dyes to a render coat would not work because the colour would fade over time even if you did achieve a uniformed initial colour when batching up. 99. Considering the size of the job I'll just use the stuff from Screwfix for this. Screwfix - Rapid-setting waterproof cement. Render up to (or very slightly below) the damp course, finishing with a 25° slope down and outwards from the dpc. If it was my place I definately would not paint it. 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. 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. With 10mm for the scratch coat and 8mm for the top coat. Water vapour permeable. i have a freshly scoured brick wall, having recently removed half an inch of old powdery paint layers. High performance waterproof treatment for exterior porous surfaces. £3. Apply with Brush or Roller. £49. I know when we do the top coat it's gonna suck the moisture out like crazy. Screwfix Community Forum. 5 Ltr. Choose from rapid or fast set cement for small commercial or domestic jobs. FREE next. View all: Bostik Specialist Paints. If I render with febond sbr sand and cement render then I can use 10mm travertine tiles. Suitable as a damp proof membrane on solid concrete floors. The Bonding coat should not be allowed to dry before application of the render or plaster. 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. • Air entraining plasticiser • Prevents shrinking and cracking during curing • Water reducing • Chloride freeMortar plasticiser for stronger, easier to use brick and block-laying mortar. Primer Paints. But i have a job to do, and i am considerong using sbr bond on it first, as im always interested in new methods. The inside of the wet solid walls seems to covered in wet sand and a black paint type substance as in the photos. 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. No waterproofer in render scratch coat. My qustion is: Will I need to use a (waterproofing?) additive to the render mix, particularly for the inside surfaces of the drain. • Prevents water penetration in a single coat • Improves resistance to dirt, oil and stains• Seals and stabilises non- structural concrete• Sealer for internal concrete floorBostik Concrete Sealer is a quick drying, low VOC water based sealer that seals and. I have followed the general advice given, 4 : 1 sharp sand / cement with the recommended amount of combined water-proofer / placterciser for good measure for the scratch coat. Suitable for 2. Good shout? Also, not location of air bricks. G4 Pond Sealer Clear. Odourless & Solvent-Free. You use a wire scratcher to form a key in this while its wet to form a good key for your second coat. Went on white. Finishes are subject to high or low maintenance all of which are discussed at time of consultation. Thompson's Water Seal uses a unique micro silicone emulsion to stop water penetration. (76 products) Aggregates and Chemicals are the components of a composite material which will resist stress providing a bulk to the composite material. For External Use. Add 1 cup of a waterproofing render mix per bucket full of water you mix. • High performance waterproofer. Buy Jointing Tape at Screwfix. Delivery Next day available. #2. Only way to test if it's still wet is with a moisture meter. more damp comes through i would like to waterproof the render. Generally, 5 litres of SBR per 25kg bag of cement in an external render for an area of normal exposure. oggie78 New Member. Sika Bond SBR+ Waterproof Bonding Agent and Mortar Admixture - 25L (6) £99. You capture lots of potential issues in one go, including new ties and new DPC, and probably the opportunity for some insulation. Fixing sheets with tile adhesive, step 1. 1. 8/5. Roughly 1 of cement, 1 of lime, 4 of sand (usually sharp), below dampcourse, no need for waterproofer (some put it in anyway-also helps spreadability). blertsville, Jul 4, 2011. £ 14. 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. £ 14. 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. It will also be 'attacked' on its front face if the render is in contact with the soil/lawn - so it might be best to have a 100mm gravel trench at the foot of the wall (or. 45 Inc Vat. Don't use sharp, builders merchants do plastering sand just tell them thats what you need. Interior Wood Paints. But I'll have a go. 4) Remove the damp plasterboard internally, remove the wet sand, waterproof paint the brick internally and. Discussion in 'Builders' Talk' started by questioner, Jul 6, 2007. The fine aggregates are suspended in a unique waterproof polymer to ensure easy application by roller or brush. A-. Bostik Waterproof Cement Grey 10kg (58196) Bostik Waterproof Cement Grey 10kg. The wall is not tanked with any waterproof membrane. koolpc and SeaJay like this. com. 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. 41 Per unit £0. To ensure thorough waterproofing of your exterior walls, you need a coating that will actively repel water. Delivery. You can use this all-in-one primer and sealer to form a waterproof layer on outdoor surfaces such as concrete, lightweight. You could have asked the plasterer to add a waterproofer to the render mix, but it's obviously too late now. Home Forums > Screwfix Community Forum > Builders' Talk >I will need to clean the base coat which is solidly attatched to the block wall and scratch it, probs with a grinder and apply a new top float coat using a mix of sand / cement / waterproofer and maybe lime as per this sites recomendations. Weather-Resistant. FREE next day delivery available, free collection in 1 minute. She got the guy back and he said 'oh well, it hasn't worked, you need the place tanking which. 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. I would add some waterproofer as a matter of routine. The correct method is as follows:- 1st coat (scratch coat) 3:1 sharp sand with waterproofer and scratched. 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. Strong fibreglass mesh tape that helps reinforce plaster coating and protects it from cracking. 7/5. £8. Buy online & collect in store in as little as 1 minute. Discussion in 'Painters' Talk' started by Joelfc89uk, May 24, 2018. Ideal for emergency repairs, filling and patching. 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. common sense tells you that this system will go nowhere and it wont. Provides superb weather protection for bricks, mortar and concrete. 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. drill driver, Jun 21, 2005. I intend to stipple a further slurry of Unibond, cement and sharp sand before I render the wall to make it suitable for applying tiles in the shower area. INNER WORLD DESIGN & BUILD LIMITED. 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. Long-lasting immediate fix. Use a mixer and measure quatities using a bucket for consistency. Most external decorative renders are painted, most have a combined waterproofer and plasticiser addidive in last coat. This is especially important if you apply a thick traditional multi-coat plaster. For easy application Tarmac One Coat Renders contain polymers. Light grey colour when dry. Neville the tap dancing gibbon, Sep 2, 2006. Cold & Heat-Resistant. 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. horses for courses, take your pick!! good luck. £13. General purpose, solvent-based. Screwfix Community Forum. Can anyone give me advice on rendering over Medium Density Blocks for an external garage. This time, its butting up against 12mm plasterboard (painted) which was dabbed directly to the brick (no render). £9. )As long as you have good key you could get away with one coat say 10 mm thick. This sealant is suitable for for repelling water on porous surfaces. He ended up really busy so we decided i'd. , Apr 8, 2005 #2. Apply directly to damp surfaces. With 10mm for the scratch coat and 8mm for the top coat. Add for Delivery. £45. 3) waterproof paint the bottom exposed brick. Brickie might. General purpose, solvent-based. 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. 1. Free next day delivery available. 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. com. Best chech out the additive that has been used with the manufacturer. The shed is 5m x 2m high & has 2 end walls about a metre wide. com. 4/immediately the last coat is on and while still wet, blind with sand. Currently in Stock. Product information. Best chech out the additive that has been used with the manufacturer. Free returns. PermaSEAL 3 Damp Proof Membrane Kit 10m². Febtank Super is a high performance tanking slurry for masonry and concrete. 99 Inc Vat. Buy Multi Purpose Fillers from Screwfix. But I'll have a go. Hello. #10. View all: Bostik Cement Mix. Available in different variants, it is important that the right basecoat paint is chosen for the job. the walls are new, 3 weeks old. Weather Shield say leave it until Spring. com. Render using Lime mortar. 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. 8. Quick-Dry Stabilising Solution. Weber One Coat Base Render 25kg. I know I need to attach mesh to the surface, but a friend has told. 7 litres of SBR per 25kg bag of cement to give a totally waterproof render. Covers up to 4m². 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.