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. Home Forums > Screwfix Community Forum > Painters' Talk > Painting render. Most if not all are painted with mansonry paint, (Specialist applications excepted, eg. Tags:. 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. FREE next. Forms a transparent, waterproof barrier. hi what is the best mix ratio for rendering internal wall . Before adding any render, ensure the wall is damp to the touch, but not running with water. 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. Can be used to seal joints between tiles, stone and brick slips and pointing around lead flashing. High Bond Strength. 8/5. com. 40. Change the physical properties of building chemicals to suit the job. Expect someone to come along with more modern alternatives. Completed an extension last summer and the exterior walls were cement rendered the usual way with waterproofer etc. I guess the best way to render the bell bead is in two parts. This would be better off in plastering forum. 1 remove lose stuff. In December I had a 2 foot earth retaining wall built in my garden to separate the garden from the patio. Ideal for Use in Basements/Cellars but may also be Used as an External Coating for Concrete, Brick, Block & Bonded Renders. ★★★★★ ★★★★★. Option No. View all: Bostik Cement Mix. This is an interior wall but yes its a wall with a window and other side is exterior. 99Inc Vat. ALlow to dry for 4 or 5 days and then finish with a render of 6:1:1 rendering sand:cement:lime. Now I am intending to use cement, sika waterproofer and sharp sand and render this wall. it is a little tired in. I have used a slurry coat first of. Good Luck. €28. FREE Click & Collect within 30 minutes. Screwfix customers rate this product 4. The fine aggregates are suspended in a unique waterproof polymer to ensure easy application by roller or brush. He ended up really busy so we decided i'd. Suitable for Water, Oils & Chemicals. Waterproof PVA. Ka Tanking Slurry Waterproofing Solution Grey 25kg. 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). By getting the finish coat on within 8. com. Order No Nonsense Anti-Crack Acrylic White 310ml at Screwfix. Discussion in 'Builders' Talk' started by ssss64, Jan 23, 2007. Ask a question. he says his shower has been leaking against the wall to which it is mounted. Suitable Application. Mould & Mildew-Resistant. 90m x 50mm. I have been trying to use sand and cement with waterproofer (everlast) to level it out but unsure if I'm doing it right. 40 per KG. Sets in 20 minutes. (£5. If the wall is dry (unlikely this year!) lightly damp it without soaking it completely before applying the. Ideal for Use in Basements/Cellars but may also be Used as an External Coating for Concrete, Brick, Block & Bonded Renders. Additional information. Once dry then add a cup full per mix of neat sealer in the water. The exterior is rendered and i'm pretty sure its trapping water in the walls and just driving it in. Cemenmt render will dmage the wall eventually - its not ok to do it. 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. Hi Guys. 4 use mechanical fixings to fix this system to the wall. Are there any issues with MDB's - i know thermalites are a pig but are these any easier?you will need to hack off the external render and re-render with sika No. 99. Discussion in 'Builders' Talk' started by Gary hunt, Oct 23, 2016. Masonry cream is snake oil, it does nothing. 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. Truth be told I've already bought six 10L tubs of Sandtex and the stabilising solution, about over a year ago. 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. Hundreds of stores Nationwide. Extremely durable and will adhere to any substrate for filling and repairs with no depth limit. Out of stock. Artifical Grass Adhesive 5kg. Waterproof a leaking roof. 3-layer spun-bonded waterproof membrane with excellent tensile and tear strength. Discussion in 'Builders' Talk' started by pete12, Jan 26, 2006. £11. 99 Inc Vat. , Feb 26, 2008. (42 products) Gloss paints are used to provide a high shine finish to interior or exterior surfaces. Order Thompsons Drive Seal Black 5Ltr at Screwfix. Tapes suitable for a range of materials stocked. 54/L quantity Collection Set Store. Ideal for emergency repairs, filling and patching. A friend has given me some acrylic render (premixed tubs 25kg) which is a topcoat, and more than enough to do the job. Buy Jointing Tape at Screwfix. Extremely durable and will adhere to any substrate for filling and repairs with no depth limit. Bostik Concrete Sealer 5L. Latest Offers At Screwfix. #9. the. Ask a question. Â New Member. 1 Preparing the substrate. 96 per L . 4:1 with morticiser for scratch you can float next day with 5:1:1 sand, cement, lime + waterproofer in water butt. ssss64 New Member. Using 4 :1 first coat and 6:1 second with waterproofer. handyman 2 New Member. Phil. Microseal Technology. £ 28. DIYDave22 New Member. This can take from between 24 hours up to two days, depending on humidity, temperature, and airflow around the building. Order online at Screwfix. I'm not expecting a smooth 'craftsmans' finish as other areas of render have a rough finish but look perfectly acceptable once painted. To ensure thorough waterproofing of your exterior walls, you need a coating that will actively repel water. Neville the tap dancing gibbon, Sep 2, 2006. £49. FREE next day delivery available, free collection in 1 minute. Buy Exterior Paints at Screwfix. First time doing render and there will be soil behind the wall but only to a depth of 300-400mm, should the back be left unrendered but with some waterproofing and drainage? Also thinking of putting some dpm behind the bottom of render as in attached pics or is this overkill! Any helpful suggestions welcome, thanks in advance!hi all,my mate wants me to re-render his damp bathroom. drill driver New Member. Try on a couple of places (bottom of wall more likely to have weak adhesion). Prop the hose up splashing against the wall and go and have a cup of tea. Customer lives close to coast will the salt in the air have any impact on my. Add for Delivery. com. Order Bostik SBR Admixture White 5Ltr at Screwfix. The wall has a land drain behind to reduce hydrostatic pressure. Search titles only By: Search Advanced search…Eco Prim Grip Plus 5kg. (we could render the side but not the back). thanks, I keep reading that you shouldn't use cement render when a wall is built with lime or cob but because it will not breath but it has already been hard rendered on the outside so therefore it is already been. Stops freeze thaw damage. com. 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. This not painted at the time as suspected water ingress problem however this issue now resolved. They have for example render products which are waterproof, yet breathable. Water & Weather-Resistant. Also for repairing cracks and damaged stone edges. FREE Click & Collect within 30 minutes. Touch-Dry in 6 Hours, Fully Dry in 24 Hours. Never heard of the 4 weeks / mould thing before. Product Type. 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. From what I’ve read on this very helpful forum, it’s a water/salt problem. Don't try and apply render in one coat it will only sag and probably fall off wall. You use a wire scratcher to form a key in this while its wet to form a good key for your second coat. He uses plastering sand and cement mixed at a 3:1 ratio with waterproofer added, no lime or plastisiser. Login to save for later. I don't see why not to both questions. I wouldn't bother with grinding the wall either just scratch 4-1-1 sand-cement-lime with waterproofer. Does any one else have the nightmare of render falling off in patches once the. Then sharp sand fine, lime, cement in 6: 1: 1 ratio as top coat. Thread by: Crooky, Jul 4, 2021, 2 replies, in forum: Builders' Talk. High bond strength. We encourage you to debate the topics and issues of the day in a friendly manner, whether related to trade/DIY or not. Click & Collect. This time, its butting up against 12mm plasterboard (painted) which was dabbed directly to the brick (no render). Use on Plasterwork, Skirting Boards, Windows & Door Frames. Sika Waterproof Coating Grey 5kg (83502) (67) compare. Fine. Buy Cable Sleeving at Screwfix. I’m leaning more towards K rend, as it’s silicone and. 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. • Drying time of around three to four hours. . (the actual water drainage path, which looks like its made of half a sewer pipe is actually in good condition, so its only the. Need some professional advice on waterproofing my 3ft garden flowerbed retaining wall. For interior and exterior floor and wall installations. Discussion in ' Builders' Talk ' started by roger waters, Sep 11, 2006 . common sense tells you that this system will go nowhere and it wont. As per usual there are so many different videos etc on the web it can get confusing. It is all studded then waterproof membrane & has expanded mesh over it and then its rendered. High performance waterproof treatment for exterior porous surfaces. The range has been hand selected from established brands, who manufacture durable products. I intend to apply sandtex stabilising solution and then sandtex fine texture paint which say's it has a breathable waterproofer in it. Sandtex masonary paint is top notch, waterproof and flexible so as long as its put onto a good base (hence the Satabliser solution first), it would do the job and look great. 24 kg. Sets in 20 minutes. Order online at Screwfix. Good luck. If you use an oil based paint, thin it 50/50 and use that as a cover coat. Is Artex Render Waterproof? Discussion in 'Builders' Talk' started by DIYDave22, Nov 8, 2023 at 5:34 PM. 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. 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. Primer Not Required. Screwfix Community Forum. 2/5. She got the guy back and he said 'oh well, it hasn't worked, you need the place tanking which. Hi Guys. £ 28. 90. 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. Screwfix Community Forum. Chemical dpc's are used as a cost cutter and are not really as good as people make you believe. I am after some advice if poss. No waterproofer in render scratch coat. Nail straight pieces of timber vertically & horizontally as required to external corners, window & door reveals. when i removed the old wood it crumbled so i pulled it all off. Volume. Light Grey. Find your nearest Screwfix store and up to date opening times. External wall is rendered. com. 1. Waterproof render for external earth retaining garden wall!!! Discussion in 'Builders' Talk' started by oggie78, Apr 7, 2009. Many thanks!The problem here, is that the render will be 'attacked from behind' by damp from within the beds - unless you're provided adequate drainage for the trapped water in the beds. giving a lighter easier to work gauge of mortar. . Free next day delivery available. 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. £27. Silicone render and waterproofing for penetrating damp. Glazing and frame sealants come in a variety of acrylic and silicone based sealants, used to keep your home free from water ingress. Ideal for use on swimming pools, water tanks, ponds, below ground concrete, as well as for render and floor screeds for water resistant applications. I'm putting a corner shower into the bottom floor (concrete pad) of my house. Product code. I have used a slurry coat first of. 1. It's a concrete block wall, approx 600mm high. sharp is for screeding. FREE next day delivery available, free collection in 1. Click & Collect. Inc. He came back and redid that area, and it leaks there worse than ever - it's just like a sponge. £ 14. Extra grip, render bonding agent that contains a fine aggregate to provide an improved mechanical key before applying render on external. have 2, or even 3 cups of tea. Repels water on wood, brick, concrete, paving, asbestos and cement. Will not corrode steel reinforcement (brick ties etc. Mix approximately 4 to 5 litres of water per 25kg bag using an electrically driven mixer until you achieve a workable consistency. Screwfix customers rate this product 4. Mr. If you don`t want waterproofer at least use a plasticiser or lime. more damp comes through i would like to waterproof the render. £ 27. Bostik Cementone General Purpose Mortar 5kg. AC50 Trade Acoustic Adhesive & Sealant 900ml. View all: Thompsons Water Seal. 5 kg. drill driver, Jun 21, 2005. VAT £15. The fine aggregates are suspended in a unique. Inc. Covers approx. 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. 3. Home Forums > Screwfix Community Forum > Other Trades Talk > waterproofing internal rendering Discussion in ' Other Trades Talk ' started by woodburner , May 16, 2006 . Delivery. Sealing porous areas and extending coverage with paint sealer will ensure a longer lasting coat. I would check adhesion using a piece of rubber, the type used for door stops (screwfix p118), glue it with superglue (allow to cure) rip it off and see what gives. 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. Product information. unfortunately came home yesterday and all covered in scratch coat with no waterproofer. Hi handy 007 1/2. The render mix I plan on using for the scratch is 5 sand, 1 cement, 1 lime, splosh of waterproofer, for the top coat, 6:1:1 but no waterproofer. Buy 3 for £11 - View Offer. UK call centre ready for your call 24/7. Hi i've built some raised flower beds / planters out of dense concrete blocks. com. The process involves using a detergent to chemically clean the render using next to no pressure at all. Offers long term durability with no gusting wind noise. Key products in the Bostik waterproofing range include: Flexacryl - a flexible, single coat compound for immediate waterproofing over most conventional roofing substrates. £ 14. £9. 1st coat scratch 1:1:4 (OPC:lime:sand), 2nd coat 1:1:5. 1. Finishes are subject to high or low maintenance all of which are discussed at time of consultation. 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. Shapeable to Repair Without Formwork. Ive been told 3:1 (2 parts sharp, 1 part builders sand) and not as wet as mortar for bricklaying. For use on solid substrates such as brickwork, blockwork and concrete, in moderate exposure conditions. BS 4887. This will depend on the surface of which it's being applied and the strength of hold required. Screwfix customers rate this product 4. I have seen many threads about lime / no lime and whether you should waterproof on the scratch coat / finish coat etc etc. Dow 791 Weatherproof Silicone Sealant Anthracite 310ml (44836) (42) compare. Suitable for a Variety of Applications. #4. 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 Details. The Sandtex Brickwork Waterproofer & Protector provides a clear waterproof protective layer for bare brickwork. Designed to be used for plasterboard internal corners. 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. 74/kg quantity Collection Set Store. Render mix. Single application waterproofing compound for emergency repair and general maintenance of most roof types. fillyboy Screwfix Select. 49 Inc Vat. com. Suitable as a damp proof membrane on solid concrete floors. weakening its bond with the brickwork/render. com. The rest of the building had bell beading so it was only about a 4 metre section I had to do. this mock tudor job i am doing has part of the render overlapping the lead flashing along the biottom. Many can be painted over to match the colour of your windows or frames. Render Waterproofer. Tarmac Once Coat Render is a pre blended render, just add water to apply. There are many external finishes - Finedown (smooth as in photos), Tyrolean, Pebble dash etc. If in the top coat the waterproofer or water resistance(r) may/fail and then damp has every chance of getting through. 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. 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. Screwfix Community Forum. Light grey colour when dry. Order Bostik General Purpose Mortar Grey 5kg at Screwfix. I've heard bad things about Sika, re: not being suitable for moxing in a cement mixer: online at Screwfix. Mix was about the same consistensy as for laying bricks. 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. unless you do a lot of good drainage behind it and seal it with something more waterproof than render. 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. I'm quite a confident diy'er and wanting to try rendering a garden wall for the first time. UK call centre ready for your call 24/7. What depth should the battons for the scratch coat be? I was looking at 10-15 mm deep off the wall. com. render on lead. Delivered by our approved supplier, Find out. #10. Screwfix customers rate this product 5/5. Screwfix customers rate this product 4. Waterproofs Plaster, Plasterboard, Plywood, Render & Concrete. One Coat Render is a high quality, pre-blended formulation, for single coat application reducing total drying time. Hi, My extension was built and rendered using a sand/cement render around 4 years ago. Adheres to damp masonry and is weather-resistant. 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. Suitable Application. #3. Will adhere without primer even on slightly damp surfaces. OK. Hi there, I need to find a suitable, waterproof render for a wetroom. 5°C. The pointing needs raking out 25mm deep, and re-pointing with a 4:1 sand & lime mix. 8/5. i know its best to take the wall back to brick,but should i add a waterproofer to the floating coat (common sense says yes) as per external render,and if so what type? i have'nt been. Stormdry Masonry Protection Cream is a colorless waterproofing cream for application to brick, stone, mortar, render and masonry. Provides superb weather protection for bricks, mortar and concrete. £9. Suitable for 2. General purpose, solvent-based. . It failed in one area, and cracked off the wall. Use a mixer and measure quatities using a bucket for consistency. Suitable for brush application only. VAT £6. 99 Inc Vat. 5Kg. 99Inc Vat. This would be better off in plastering forum. Use a bitumous tanking primer on the clean stone internally and throw gritty sand at the wet black jack for a key when dry. The pointing needs raking out 25mm deep, and re-pointing with a 4:1 sand & lime mix. Exterior decorators acrylic for sealing around exterior window and door frames in most building substrates. 7 litres of SBR per 25kg bag of cement to give a totally waterproof render. waterproof render. £32. 2017 #2. 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. Items are easy to install and use while. i now have to patch it up, about a 2 inch strip. Handyandy, Oct 23, 2005. 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). Not if you’re using lime, paint a waterproofer on after Watch the weather, spray bottle at the ready keep it damp, and don’t curse when the scratch coat cracks Abrickie , May 21, 2020Plumbcrazy New Member. Neosparks, May 30, 2006. 250 cement board. Still I`d be interested to hear other peoples approach. Choose from top trade brands. Use on brick, concrete and stone. 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. Fill in gaps. Most if not all are painted with mansonry paint, (Specialist applications excepted, eg. £12. Sika Waterproof Coating Grey 5kg (83502) (68) compare. the problem comes because one of the old walls has the damp course below of extension. Choose from rapid or fast set cement for small commercial or domestic jobs. Will this be enough. The Bonding coat should not be allowed to dry before application of the render or plaster. the case is, it is a kitchen area, i have plastered 4 walls, 3 dried completely. cement board and the masonry wall must be wiped down to. Hazard safety codes: Xi, R36, R38, R52, R53. At present it’s a thin coat of sand and cement mix with metal beading that’s rusty, on top of Accrington brick. I'm no pro on this, but have done a lot of research into it. Volume. G4 Pond Sealer Clear. Features include multi-pockets, adjustable designs and reflective tape so that you can be seen. She got the guy back and he said 'oh well, it hasn't worked, you need the place tanking which. com. The formula is solvent-free, making it more environmentally friendly by reducing pollution. blertsville, Jul 4, 2011. Click & collect in stores nationwide. shazauk New Member. uk. Designed for use in fully. Stormdry Masonry Protection Cream is a colorless waterproofing cream for application to brick, stone, mortar, render and masonry. rogerk101 Screwfix Select. Click and collect in as little as 1 minute. Can anyone give me advice on rendering over Medium Density Blocks for an external garage. Contains primer, coating and waterproof jointing tape. Bonding is not a good idea on external walls, it attracts water to it. The render on the outside should waterproof the wall anyway. This is especially important if you apply a thick traditional multi-coat plaster. Provides perfect adhesion without the use of a primer, even on damp substrates. • High performance waterproofer. Hmmm, that could look impressive.