A-. 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. Not available for delivery. Wire brush the exposed walls to be sure that there is no mould on the. 90min Approximate Setting Time. 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. £179. It is supplied in the form of a deeply penetrating cream that is applied to the wall surface using a roller or brush. i dont really want to strip it all off and start again as im sure there is something i can do with it and with a bit of luck the answer will be in hear with all the tradesmen. 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. OP, Now I can see why the fire wall and the stack have been rendered. Hi Guys. Render mix. don't pva the wall either first coat with waterproofer in and second coat with waterproofer in also. 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. At minimum, the rear of HardieBacker® 250. As well as offering protection, exterior wall paint improves the appearance of a property by brightening it up and bringing it back to life. 99 Inc Vat. Evening guys. Product Type. (42 products) Gloss paints are used to provide a high shine finish to interior or exterior surfaces. Grey. My plan is: 1) Cut back the render from the ground. The render goes right down to the ground outside. #10. Screwfix Community Forum. Forms a transparent, waterproof barrier. 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. Cementone Freeflo Plasticiser is a retarding waterproofer and plasticiser. B) To seal around the bathtub - I am planning on using the Schluter Kerdi TS Bath and Shower Sealing Kit. 1:20 rather than the more dilute 1:40 option. Provides superb weather protection for bricks, mortar and concrete. The inside of the wet solid walls seems to covered in wet sand and a black paint type substance as in the photos. Is vital that the waterproofer is added in the correct amounts according the the manufactures instructions. common sense tells you that this system will go nowhere and it wont. 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. cautious New Member. Wet room Kits consists of a mix of products which are needed when creating an open plan showering area. Float at 5:1:1 Builders sand : OPC : LIME with waterproofer in the water How does that sound? 2. Doozergirl said: In a word, no. It produces a superior. Covers Approx. What depth should the battons for the scratch coat be? I was looking at 10-15 mm deep off the wall. £3. Use it as a bonding agent, primer, sealer and. Offers long term durability with no gusting wind noise. Question is 1. Ideal for locations such as basements and cellars or for external coating for concrete, brick, block and bonded renders. Delivery. FREE next day delivery available, free. . 5/5. 99Inc 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. 99. ex. Waterproof a leaking roof. when i removed the old wood it crumbled so i pulled it all off. This would be better off in plastering forum. A waterproof render is more a damp proofer than a waterproofer. 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. The internal walls are damp from floor to ceiling and I am told by a specialist damp firm that the damp is due to the cracking. Product Type. Do what the gardener should have done. 1. £ 28. Ka Tanking Slurry Waterproofing Solution Grey 25kg. This coat should be applied while the first coat is still. com. Any advice would be greatly received, we dont want to knock it down. 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. But I'll have a go. Universal Protector Water-Repellent Spray. With regards the tile adhesive Devils advocate is. Cold & Heat-Resistant. Screwfix Community Forum. If it could be dug down far enough then a waterproof render might be enough hallbeck, Jan 24, 2007 #3. Login to save for later. £39. Never heard of the 4 weeks / mould thing before. Coverage: Approximately, 1 litre of SBR per sq metre at. These products enable a way to effectively aid in water removal as well as keeping other area’s watertight. She got the guy back and he said 'oh well, it hasn't worked, you need the place tanking which. This is an interior wall but yes its a wall with a window and other side is exterior. If you do not want to change the appearance of these walls then use a masonry waterproofer (two coats). Fill holes and cracks with ease, suitable for many applications. Low Odour. Screwfix Community Forum. Extremely durable and will adhere to any substrate for filling and repairs with no depth limit. Key products in the Bostik waterproofing range include: Flexacryl - a flexible, single coat compound for immediate waterproofing over most conventional roofing substrates. KIAB Super Member. Then sharp sand fine, lime, cement in 6: 1: 1 ratio as top coat. I use to put waterproofer in both coats, but some peeps on do scratch coat. Handyandy, With your technical knowledge of paint it is a relief that you don't work as as brain surgeon with an equivilent knowledge of neurology. com. Everbuild’s Black Jack paint is perfect for. 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. Order online at Screwfix. Any recommendations based on the wall being made from dense blocks?If you were re-rendering the house you wouldnt put a waterproofer on first. Volume. Heat-Resistant. PermaSEAL 3 Damp Proof Membrane Kit 10m². Forms a transparent, waterproof barrier. • High water and rain resistance • Water reducing • Provides long term water protection• Chloride free New Sika sku available (code 98821)Long term water protection to mortar, concrete and rendering. Internal Skimming of conservatory walls. Our team of experts are on hand to help you at every step of the process. 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). The wall has a land drain behind to reduce hydrostatic pressure. Artifical Grass Adhesive 5kg. Bricks are non porous, that's why houses are made of them. 5/1 sand & cement if the house is that old i would add a waterproofer too. Its a painted concrete block wall, about 60m by 2m. Should be ok to overpaint SBR with masonry paint. 5:1:1/2 Good gritty sand, (or plastering/rendering sand) cement, lime, in two coats, scratch first coat, no pva just well dampened walls. Leaving me a few mm to be skimmed. Buy. 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. He came back and redid that area, and it leaks there worse than ever - it's just like a sponge. Because it's durable, weather-resistant and breathable, Weber one coat render is particularly useful for outside areas that are exposed to the weather, like garages, conservatories or garden walls. Weberend One-Coat Base Render (OCR) is a versatile pre-blended single coat application render, ideal for rendering brickwork, blockwork and concrete. Phil the Paver, Nov 22, 2014. I wouldn't re-render - leave the bricks open to the air. This sealant is suitable for for repelling water on porous surfaces. The paint has been fine until this very wet spring, when it started to bubble and peel in large random areas. The render on your house has cracked due to a number of reasons, it could of been done in poor weather, or not enough mechanical key. The rendering is falling off because it is dead and no longer adheres to the surface of the wall. PVA Sealers. Show More. My idea is to remove the lose render from around the window (as I have started to do already) + remove any old foam. £13. Screwfix customers rate this product 4. i have a freshly scoured brick wall, having recently removed half an inch of old powdery paint layers. Mr. Inc. 5m x 0. com. 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. For use on solid substrates such as brickwork, blockwork and concrete, in moderate exposure conditions. €28. The aesthetics don't concern me too much as when the border is planted again, not much of the wall is going to be seen, so I'm not particularly worried about colour matching the. 2 apply a suitable rendering adhesive (Powerwall make one but so do others it is like a polymer based tile adhesive) 3 bed a fibre glass mesh in the adhesive and trowel flat. There is a white crystal deposit under left on the exposed render. 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. (76 products) Aggregates and Chemicals are the components of a composite material which will resist stress providing a bulk to the composite material. apply the sand and cement to above 1/4 inch of the existing. Weberend One-Coat Base Render (OCR) is a versatile pre-blended single coat application render, ideal for rendering brickwork, blockwork and concrete. Weather-Resistant. High bond strength. Weather Shield say leave it until Spring. Bostik 1kg Cementone Colours for Cement - Buff (47) £9. I'm quite a confident diy'er and wanting to try rendering a garden wall for the first time. 6 January 2021 at 10:22PM. Exterior rendering is, I think, a more manageable beast that, say, internal skimming. 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. Free next day delivery available. Temporary repair required because house goes on market in 10 days time and I dont think I will be able to get anyone in before then (Oxford). PayPal accepted online. The DPC is there to stop raising damp, the rendering should be waterproof so it's not going to cause a raising damp issue, lots of houses have render right down to the ground level, though a lot of them will have a kicker plinth at the point of DPC to stop rain water running down the wall beyond the DPC, this. shazauk New Member. This is your 'drip-tray' separating the above and below dpc areas. 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. High performance waterproof treatment for exterior porous surfaces. Rendering of chimney. Then simply follow the manufacturer's painting guidelines perfectly. Not available for delivery. View all: Bostik Specialist Paints. com. After application by brush, roller or spray; Stormdry provides breathable protection against rain penetration on exterior weather-facing walls. Easily secure a wide range of applications in place. £45. 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. Recycled Polypropylene Construction. 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. 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. 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. All walls were PVAed before rendering. £2. you will then have a render. 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. Weber One Coat Base Render 25kg £18. Odourless & Solvent-Free. the problem comes because one of the old walls has the damp course below of extension. Apply with Brush or Roller. Discussion in ' Builders' Talk ' started by Fussy Spark, Dec 27, 2020 . Hazardous Product – Not available for Mail Order/ TCND outside of Mainland UK. Mix approximately 4 to 5 litres of water per 25kg bag using an electrically driven mixer until you achieve a workable consistency. Delivery. com. Construction Project Manager, May 29, 2015. This has now altered a little and it will often look like a kind of crazy paving which I belive are cracks in the dash which is allowing water into. Fast-Drying. If I render with febond sbr sand and cement render then I can use 10mm travertine tiles. Screwfix Community Forum. Sometimes i use wire ( render lathe to all you young spreads ). If you are in a bit of a wild area, then consider epoxy - two-pack - masonry paint. The garage is being used as a semi heated workshop hence the insulation, but I don't forsee any great generation of moisture within. damp down the area your about to work on to get rid of the dust. £ 14. It's all more controllable, and the 'plaster' ain't setting before your very eyes sending you into a blind panic. Suitable for a Variety of Applications. Glazing and frame sealants come in a variety of acrylic and silicone based sealants, used to keep your home free from water ingress. Reduces water permeability. It is all studded then waterproof membrane & has expanded mesh over it and then its rendered. Protecting from rain, frost, ice and snow, this product is ideal for providing extra protection to your home's exterior. Weber One Coat Base Render 25kg. Discussion in 'Builders' Talk' started by Victor Lek, May 24, 2022. Suitable for new or renovated substrates, either unpainted or painted: gypsum plaster, old painted surfaces, cement, concrete, breeze blocks, bricks, stones, glass and glazed tiles. Page 1 of 2 1 2 Next > Thread Replastering around doorframe with very uneven brick walls. Wait a few minutes, feel the pva. Click & Collect. He rendered approx two square mtres at a time before applying dash. 49. The real question is is galvinised mesh ok. . If it was my place I definately would not paint it. Deme23 New Member. Ideal for Use in Basements/Cellars but may also be Used as an External Coating for Concrete, Brick, Block & Bonded Renders. Choose from rapid or fast set cement for small commercial or domestic jobs. It seems a lot of dampness for such a small amount of cracking but I suppose this is the best place to start to reduce the. 90. Have look at Weber Weberend Aid made for smooth surfaces, will provide a key. Search titles only By: Search Advanced search…Eco Prim Grip Plus 5kg. Hazardous Product – Not available for Mail Order/ TCND outside of Mainland UK. Buy Cement Mix at Screwfix. • Apply in temperatures from +5°C to +25°C. Ideal for emergency repairs, filling and patching. Phil the Paver Screwfix Select. I’m doing the patio and the intention is to fill the void. Bostik Waterproof Cement Grey 10kg (58196) Bostik Waterproof Cement Grey 10kg. Damp walls can cause salt deposits to appear – these can blow your plaster. Asked at the garden centre, what to do to stop it soaking in. I would add some waterproofer as a matter of routine. Extra Rapid Cement is supplied in weatherproof and tear-resistant plastic bags. If you bought the paint you can get a refund on it. Use a bitumous tanking primer on the clean stone internally and throw gritty sand at the wet black jack for a key when dry. 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%. Product Type. 99 Inc Vat. Can be applied onto a damp. Suitable for brush application only. ex. The fact that it's a retaining wall means that it's going to be damp, almost by definition. 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. TDav Member. Suitable for new or renovated substrates, either unpainted or painted: gypsum plaster, old painted surfaces, cement, concrete, breeze blocks, bricks, stones, glass and. Using 4 :1 first coat and 6:1 second with waterproofer. Finishes are subject to high or low maintenance all of which are discussed at time of consultation. Colour coded for easy identification. Prepare walls by straightening them out with a two coat render system and a waterproofer agent added to mix. Product Details. Hydrated Lime seems to be disappearing, I know several places around here no longer stock it. General purpose, solvent-based. Extremely durable and will adhere to any substrate for filling and repairs with no depth limit. Suitable as a damp proof membrane on solid concrete floors. 99 Inc Vat. The pointing needs raking out 25mm deep, and re-pointing with a 4:1 sand & lime mix. FREE next day delivery available, free collection in 1 minute. Provides superb weather protection for bricks, mortar and concrete. Dried clear. When dry paint to match. remove all dust. 25 Year Waterproofing from a Single Coat . My qustion is: Will I need to use a (waterproofing?) additive to the render mix, particularly for the inside surfaces of the drain. Good luck. Cement-based, rapid-setting flexible adhesive. Sealing porous areas and extending coverage with paint sealer will ensure a longer lasting coat. Buy Aggregates & Chemicals at Screwfix. 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. 4) Remove the damp plasterboard internally, remove the wet sand, waterproof paint the brick internally and. qwas123 Screwfix Select. 5 apply new finish. 45 Inc Vat. Float at 5:1:1 Builders sand : OPC : LIME with waterproofer in the water How does that sound? 2. I want to chop off about 500mm from the wall to widen the path and then render the cut end to match the wall - so a small area to render, approx 900mm high by 2 brick widths. giving a lighter easier to work gauge of mortar. 99Inc Vat. Can anyone give me advice on rendering over Medium Density Blocks for an external garage. Apply with Brush or Roller. Two thin render coats. Bonding is not a good idea on external walls, it attracts water to it. Screwfix Community Forum. Covers up to 4m². Morning all, I'm looking to render 3 garden walls, all made from 7. These so called hydrophobic coatings come in a range of different types, and offer all of the qualities that are needed to prevent the issues mentioned above. B. Discussion in 'Painters' Talk' started by Joelfc89uk, May 24, 2018. 4-1 first coat and 5-1 second coat 3-1 is to strong it will be to brittle and might crack. With top trade brands available, offering great quality products, you'll be able to continue working even on the. 99Inc Vat. Click & Collect in as little as 1 minute. I intend on having the front of the wall rendered so it is important that it is sealed correctly. I don't see why not to both questions. . poolthetool is spot on. Contains primer, coating and waterproof jointing tape. 49Inc Vat. 99 Inc Vat. So it'll be damp from behind (penetrating damp) and damp from below (rising damp), so not much to be gained by. PVA is a water-insoluble resin which is typically white at the point of application, but dries colourless and has a high bonding strength. 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'. Waterproof. Delivery Out of stock for delivery. Need some professional advice on waterproofing my 3ft garden flowerbed retaining wall. Mould & Mildew-Resistant. View all: Bostik Cement Mix. He came back and redid that area, and it leaks there worse than ever - it's just like a sponge. 50/Kg)Product Details. Render Waterproofer. Microseal Technology. Contains enough to waterproof a standard sized shower. Styrene-free, vinylester-hybrid, high performance mortar for the most demanding requirements. com. unfortunately came home yesterday and all covered in scratch coat with no waterproofer. It failed in one area, and cracked off the wall. 5. ★★★★★ ★★★★★. The wall is an external leaf, subject to high prevailing salty winds and has had dampness for years. Adhesives are used for bonding a variety of materials. #3. UK call centre ready for your call 24/7. Only way to test if it's still wet is with a moisture meter. Thompson's Water Seal uses a unique micro silicone emulsion to stop water penetration. com. DIY_Has123, Feb 3, 2021. You can use this all-in-one primer and sealer to form a waterproof layer on outdoor surfaces such as concrete, lightweight. Nail straight pieces of timber vertically & horizontally as required to external corners, window & door reveals. Any thoughts anyone? Plumbcrazy,. Considering that you nickpuff seem to be the only person that is unable to decipher plain English I will help you out a little. G4 Pond Sealer Clear. Product Type. £9. Designed to be used for plasterboard internal corners. I would get your render on soon so the block work can dry out. Light Grey. 96 per L . However as an temporary repair would it be OK to remove the loose render, apply unibond and then use Waterproof cement from Evo-stik - idea being this sets in 20 mins. Add for Delivery. Click & collect in stores nationwide. Single application waterproofing compound for emergency repair and general maintenance of most roof types. #2. £ 52. Hazard safety codes: Xi, R36, R38, R52, R53. dougalhouse Member. , Apr 8, 2005 #2. Order online at Screwfix. Click and collect in as little as 1 minute. Use a waterproofer additive. If the wall is wet, not sure trapping the damp in the wall in under new. Cmd38 New Member. Can be used for rendering, roughcast, pebble dashing, harling and above ground waterproofing. MyPetFrog likes this. Screwfix - Rapid-setting waterproof cement. 5mm plasterboard to the wall, and then skim. The 2nd. Click & Collect. FInish with horizontal scratches for a key. 1/5. IKOpro Synthaprufe Trade is easy to apply and provides damp proofing for concrete floors, foundations and masonry walls below, at or above ground level. Reduces surface absorption. Provides a hard wearing, protective layer on wood, metal and cement. Light grey colour when dry. Don't try and apply render in one coat it will only sag and probably fall off wall. com. Free returns. Mix it at 5-1 sand - cement with waterproofer. Fillers and Putty are used to fill or seal holes, cracks, or gaps prior to further decorating. Find directions and contact info, read reviews and browse photos on their 411 business listing. Will fill without depth limit and repair without formwork. Hi, I wonder if anyone can help/ offer some advice as we’re at our wits end. The builder has incorporated PVA into the traditional render. Order Sandtex Quick-Dry Stabilising Solution 5Ltr at Screwfix. Learn more about Graphic Design Architectural Rendering | Victoria, BC. It has many uses, and is suitable for most porous. A nightmare rendering on smooth lightweight blocks, hate it. 'A' way to do it is this. Thread. Add for Delivery. #2. 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. Advice on mix varies. I have used a slurry coat first of. com. 3/when dry, three coats bitumen. Mould & Mildew-Resistant. Secondly, if you did render them then a finish coat of plaster would be nigh on impossible to get right as sand would inevitably break away from the render into the top coat as the plaster is applied. Sets in 20 minutes. Just. Screwfix Community Forum. Long-lasting immediate fix. 99 Inc Vat. You use a wire scratcher to form a key in this while its wet to form a good key for your second coat. Order online at Screwfix. The PVA glue can be dilated up to 5:1 with water for maximum use. Prop the hose up splashing against the wall and go and have a cup of tea.