That's not to say lets seal the moisture in the bricks. We also don’t think it’s had waterproofing mixed in. 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. Screwfix Community Forum. You can use any Render bonding or gripping to prep & fix all render patches - use Polyurethane sealant for filling the recently opened cracks. And all this after the walls were skimmed and painted. Bricks are non porous, that's why houses are made of them. Hazardous Product – Not available for Mail Order/ TCND outside of Mainland UK. Fast-setting, polymer-enhanced, cement-based repair mortar. 99 Inc Vat. 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). Thompson's Water Seal uses a unique micro silicone emulsion to stop water penetration. Ok, I don't know what mix to use, whether to use PVA, or how much waterproofer to add - although all that stuff must be out on the interweb. At present it’s a thin coat of sand and cement mix with metal beading that’s rusty, on top of Accrington brick. Add for Delivery. In fact, cracks are still appearing now, nearly a year on. 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. Heat-Resistant. Home Forums > Screwfix Community Forum > Builders. Volume. com. 8m)above newly-fitted french doors to render. £7. £9. 1. Considering that you nickpuff seem to be the only person that is unable to decipher plain English I will help you out a little. 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). Some wall primers create barriers to stop. When dry paint to match. Click & Collect. alrite mate, if the blocks bricks are sound(no cracks in joints or the bricks)you should wet down the surface(not to much)then scratch coat using a waterproofer and plasticiser,either when this has took up enough or the next day apply second coat again using plasticiser and you should be ok!(plasticiser helps retain air in the mix and. com. ex. Show More. Morning all, I'm looking to render 3 garden walls, all made from 7. Covers up to 4m². Click & Collect. 1st coat scratch 1:1:4 (OPC:lime:sand), 2nd coat 1:1:5. The last thing you need for tiling is a skim finish - tiling takes best on a background float such as a 3:1 mix of sand and NH lime. What do you reckon is the prime time to float finish render. Available in a variety of options. Extremely durable and will adhere to any substrate for filling and repairs with no depth limit. Ask a question. Our team of experts are on hand to help you at every step of the process. Â , Jan 25, 2008For 'normal' render this would be a day or more, but with SBR in the mix, it should be no MORE than 8 hours? I assume that if you did leave it a day between scratch and finish coats, when using SBR in the render, you should prime the scratch coat surface before applying the finish coat with SBR slurry mix. Deme23 New Member. The pointing needs raking out 25mm deep, and re-pointing with a 4:1 sand & lime mix. 'A' way to do it is this. 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. Use plasticiser on both coats. Create a smooth base. 4/immediately the last coat is on and while still wet, blind with sand. I intend to apply sandtex stabilising solution and then sandtex fine texture paint which say's it has a breathable waterproofer in it. Use a waterproofer additive. • Apply in temperatures from +5°C to +25°C. #9. Home Forums > Screwfix Community Forum > Builders' Talk > Rendering. 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. All walls were PVAed before rendering. 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. Hello. 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. Sanitary Fixings Kits. Brick waterproofer to help prevent damp on bricks & masonry. Buy. Suitable Application. This not painted at the time as suspected water ingress problem however this issue now resolved. View all: Mapei Shower Waterproofing Kits. FREE Click & Collect within 30 minutes. Due to the damp problems and salt, I decided to go expensive on bonding and have been caking the surfaces and mortar lines with SBR / cement slurry before rendering. Recycled Polypropylene Construction. Screwfix Community Forum. So I. 90m x 50mm. Delivery. 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. 2) Fit a bellcast. Im an old skool plasterer ( 34 years old ) And when i am rendering i use sand,cement and waterproofer/feb. It is only about 2 months old is it possible I can have a a company in to lay k-rend straight onto the render?The plas will work its way into the mix and soften down the mix as it turns. Product Type. Most if not all are painted with. Will depend on the type of silicon, and will only work with oil based paint. Slow setting time makes it ideal for covering large areas in one application. I don't see why not to both questions. Coverage per Litre: 6m²/Ltr. 99. The front apex has often shown signs of water ingress as the mortar lines underneath are often visible after heavy rain. Screwfix Community Forum. Thread. Does this sound good to you. PVA is a water-insoluble resin which is typically white at the point of application, but dries colourless and has a high bonding strength. The wall has a cavity with no insulation and about 150mm above the damp course. Change the physical properties of building chemicals to suit the job. This is your 'drip-tray' separating the above and below dpc areas. The product can also be used to protect retaining wall structures. Discussion in 'Builders' Talk' started by Bungditin. Login to save for later. com. . View all: Bostik Specialist Paints. Whether you’re looking to stop a leak, repair an existing roof, or fit a new roof, Bostik has a solution to support the step-by-step process of your next waterproofing project. The wall is an external leaf, subject to high prevailing salty winds and has had dampness for years. i now have to patch it up, about a 2 inch strip. com. 99 Inc Vat. I have rendered walls in my bathroom and want to glue the acrylic panels directly to them what would be the best primer to use?Pieces in Pack/Case. Light grey colour when dry. £13. Coverage: Approximately, 1 litre of SBR per sq metre at. Hi, I have an 1910 solid brick, no cavity built house that is all pebble dashed. Mix it at 5-1 sand - cement with waterproofer. You could remove all the damp affected render and plaster back to stone and then render with a 4:1 mix of sand and NH lime. Sika Waterproof Coating Grey 5kg (83502) (68) compare. With regards the tile adhesive Devils advocate is. Sika Proof Liquid Waterproofing Admixture is a general purpose, ready to use, economic waterproofing admixture for mortars and concretes. You would usually add waterproofer to the scratch coat (base coat), & again to final/floating coat (top coat). The range has been hand selected from established brands, who manufacture durable products. Protect your outdoor surfaces from the weather by coating them with black bitumen paint from Everbuild. Light grey colour when dry. This is an interior wall but yes its a wall with a window and other side is exterior. 99Inc Vat. FREE next day delivery available, free collection in 1 minute. Home Tags > rendering. Buy Aggregates & Chemicals at Screwfix. Render using Lime mortar. giving a lighter easier to work gauge of mortar. The fine aggregates are suspended in a unique. 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. Extremely durable and will adhere to any substrate for filling and repairs with no depth limit. Live in an old stone cottage,just chopped a load of original lime/horsehair plaster off some of the kitchen walls,rendered it couple off weeks ago with 1st coat 3 sharp 1 soft 1 cement and redermix aditive,put the soft in as did a 3. 5mm thick maybe more on old uneven walls it has a waterproof addative in the mix. Use a firm hand to. Home Forums > Screwfix Community Forum > Builders' Talk > Damp wall render. Product Type. View all: Bostik Specialist Paints. Will fill without depth limit and repair without formwork. 99 Inc Vat. For Cement Based Mixes. Everbuild Solvented Grab Adhesive 350ml (6048H) (245) compare. A nightmare rendering on smooth lightweight blocks, hate it. £179. £ 14. Waterproofs Plaster, Plasterboard, Plywood, Render & Concrete. It incorporates a Polymer bonding aid allowing the results. 99 Inc Vat. PayPal accepted online. My builder is advising to render and d&d, but this seems like more work to me for no real reason. Jesus some ridiculous answers. you can hose down the scratch coat just before you. Product information. Considering the size of the job I'll just use the stuff from Screwfix for this. The render on the outside should waterproof the wall anyway. From what I’ve read on this very helpful forum, it’s a water/salt problem. 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. Low Odour. #3. Buy Cable Sleeving at Screwfix. Or it could look like an unfinished wall (which, of course, it is ) I think it looks good in these photos. Render up to (or very slightly below) the damp course, finishing with a 25° slope down and outwards from the dpc. 99 Inc Vat Click & Collect Not available for delivery Buy Bonding Agents at Screwfix. Order Thompsons Drive Seal Black 5Ltr at Screwfix. Screwfix Community Forum. Ideal for emergency repairs, filling and patching. VAT £15. UK call centre ready for your call 24/7. For Interior & Exterior Use. Use it as a bonding agent, primer, sealer and. Screwfix Community Forum. Render question. Search titles only By: Search Advanced search…Eco Prim Grip Plus 5kg. UK call centre ready for your call 24/7. It Is single skinned and with render onto boards which were lined with fibreglass mesh. 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). One Coat Render is a high quality, pre-blended formulation, for single coat application reducing total drying time. Sharp sand coarse and fine, lime and cement in 2 : 2: 1 :1 ratio for bottom coat ( scratch ) coat, with waterproofer. It sets to a rock-hard finish and can be overcoated in 24 hours. Easy to shape and can be used on a variety of rough masonry surfaces including cement, concrete, breeze blocks, bricks and stones. Do what the gardener should have done. 1. Screwfix Community Forum. Wait several hours until the coating of Primer G is completely dry. 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. 1/ clean all walls of loose material. FREE next day delivery available, free collection in 1 minute. 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. 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. Not available for delivery. The biggest problem with a single-skin external wall is condensation which most people confuse with rising damp. Hmmm, that could look impressive. For External Use. Choose this handy pre-mixed sand and cement render from Weber to cover brickwork, blockwork, concrete and other suitable surfaces. £2. For use on solid substrates such as brickwork, blockwork and concrete, in moderate exposure conditions. (we could render the side but not the back). Run a hose against it. Render thickness seems to be between 5 and 10 mm. Home Forums > Screwfix Community Forum > Builders' Talk > Help with Rendering please Discussion in ' Builders' Talk ' started by mikethesmoke , Apr 26, 2009 . Don't try and apply render in one coat it will only sag and probably fall off wall. Click & Collect. Buy 3 for £11 - View Offer. £21. Cemenmt render will dmage the wall eventually - its not ok to do it. I have waterproofer and unibond. Over 40,000 products. Completed an extension last summer and the exterior walls were cement rendered the usual way with waterproofer etc. SKIP19C THOMPSONS WTRSEAL ULTRA WTRPRFG. Handyandy, Oct 23, 2005. Reduces water penetration without acting as a vapour barrier. Sika Proof Liquid Waterproofer 5L £7. General purpose, solvent-based. Can be used for rendering, roughcast, pebble dashing, harling and above ground waterproofing. This would be better off in plastering forum. Product code: 139057. That will last. cautious New Member. Often soft in texture, when applied these substances harden. 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. Silicone render and waterproofing for penetrating damp. 6/5. A typical mix to produce a water resistant mortar or render would be sand:cement 4:1 using SBR Bonding Agent diluted 1:3 with water as the gauging water Application – Bonding Agent For bonding render or plaster use SBR Diluted with water 1:3 or 4. 99 Inc Vat. Ideal for emergency repairs, filling and patching. render on lead. 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. Right have got to render the side of a concrete pad and would like to mix a rapid hardener and frost-proofer additive together with a waterproofer additive to use in the mix. Suitable Application. The old injection attempt has not worked, and neither has the inside attempt to render to 1m ht. If the wall is wet, not sure trapping the damp in the wall in under new. Volume. Ideal for Use in Basements/Cellars but may also be Used as an External Coating for Concrete, Brick, Block & Bonded Renders. Volume. She got the guy back and he said 'oh well, it hasn't worked, you need the place tanking which. Suitable Application. #2. Use a mixer and measure quatities using a bucket for consistency. Come back the next day if you like, and see what sort of waterfall you have running down the back of the wall. Waterproofer in Render? Discussion in 'Builders' Talk' started by TDav, Sep 9, 2018. that's why i am kind of believe the exterior wall is vulnerable to weather conditions. Can be used to seal joints between tiles, stone and brick slips and pointing around lead flashing. Daveukleics Member. Order online at Screwfix. • High performance waterproofer. Delivery. 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. Click & collect in stores nationwide. Primer Not Required. £9. Exterior rendering is, I think, a more manageable beast that, say, internal skimming. You should have. The 2nd. 49. Expect someone to come along with more modern alternatives. 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. KIAB Super Member. But i have a job to do, and i am considerong using sbr bond on it first, as im always interested in new methods. 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. Mix approximately 4 to 5 litres of water per 25kg bag using an electrically driven mixer until you achieve a workable consistency. . Handyandy - really Mr. Suitable for 127mm Wide Coving. PVA is a water-insoluble resin which is typically white at the point of application, but dries colourless and has a high bonding strength. Most external decorative renders are painted, most have a combined waterproofer and plasticiser addidive in last coat. Victor Lek Member. Bostik Cementone General Purpose Mortar 5kg. Discussion in 'Builders' Talk' started by questioner, Jul 6, 2007. It’s in such bad shape that you can push your finger quite easily into it and it comes away like wet sand. No waterproofer in render scratch coat. Rub up the render with a plastic or wood float ( an off-cut of 2" x 4" will work as a float trowel) and tile straight on to it. ALlow to dry for 4 or 5 days and then finish with a render of 6:1:1 rendering sand:cement:lime. Leaving me a few mm to be skimmed. The fine aggregates are suspended in a unique waterproof polymer to ensure easy application by roller or brush. Discussion in 'Builders' Talk' started by ssss64, Jan 23, 2007. Click & Collect in as little as 1 minute. Soudal Repair Express Plaster Filler White 250ml (125RG) (4) compare. weakening its bond with the brickwork/render. There are specialist products on the market such as those available from Sika or Flexcrete which are technically advanced and suit this purpose. giving a lighter easier to work gauge of mortar. Question is 1. For Fixing, Sealing & Binding. Neosparks, May 30, 2006. Volume. Screwfix customers rate this product 4. I intend on having the front of the wall rendered so it is important that it is sealed correctly. For plinth probably be best to apply in 2 or 3 coats and pretty stong mix with waterproofer 3 sand 1 cement. 4-1 first coat and 5-1 second coat 3-1 is to strong it will be to brittle and might crack. chillimonster Screwfix Select. Mould & Mildew-Resistant. Order online today. Covers Approx. 90 Ex VAT. Buy Cement Mix at Screwfix. Contains enough to waterproof a standard sized shower. My sister had her coal cellar done last year, and the guy used Sika 1, then rendered and plastered over it. Im asking for some advice on the best way to repair this. 1 originaly and it was too rough to work with,managed to get 2 coats on 1 area straight away no probs. dougalhouse Member. IKOpro Synthaprufe Trade is easy to apply and provides damp proofing for concrete floors, foundations and masonry walls below, at or above ground level. At minimum, the rear of HardieBacker® 250. im rendering onto concrete blocks on the outside of my new shed/workshop. In the presence of water these swell and block the capillaries and pores in the applied sand / cement renders, screeds and mortar to provide an effective barrier against the transmission of liquid water with a proven track record for over 100 years. Dow 791 Weatherproof Silicone Sealant Anthracite 310ml (44836) (42) compare. PVA Sealers. com. 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. Ideal for emergency repairs, filling and patching. View all: Bostik Cement Mix. These products are suitable for use on a variety of materials and can be applied by hand with minimal tools. 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. Softwashing is the best way of cleaning your render. 5 kg. 7/5. common sense tells you that this system will go nowhere and it wont. Waterproof. I have been trying to use sand and cement with waterproofer (everlast) to level it out but unsure if I'm doing it right. 99 Inc Vat. 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. Also for repairing cracks and damaged stone edges. 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. Primer Paints. Wait a few minutes, feel the pva. I'd get rid of the rusted steel regardless of what you do (unless you tile) as it will bleed through render etc BMC2000 , Oct 10, 2017Hah. Touch-Dry in 6 Hours, Fully Dry in 24 Hours. Cold & Heat-Resistant. He uses plastering sand and cement mixed at a 3:1 ratio with waterproofer added, no lime or plastisiser. 1. 25 Year Waterproofing from a Single Coat . The proceedure is:-. Quick-Dry Stabilising Solution. I know I need to attach mesh to the surface, but a friend has told. I use to put waterproofer in both coats, but some peeps on do scratch coat. Ideal for Use in Basements/Cellars but may also be Used as an External Coating for Concrete, Brick, Block & Bonded Renders. waterproof finish of say, a gloss paint, and finding that underneath is very soluble. 40. 35°C. Buy Resins at Screwfix. dougalhouse Member. 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. £ 14. 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. He came back and redid that area, and it leaks there worse than ever - it's just like a sponge. Good luck. Can I tile onto render that has been made up with plastering sand and Sika1 waterproofer or should I plaster then tile?but im having a nightmare. Depending on the ratio you used for waterproofer/water in your mix you should find that the render is virtually weatherproof. When diluted with water it produces a gauging solution for improved adhesion, workability and waterproofing of mortars and cementitious mixes. . (£5. 5055492702975. It has many uses, and is suitable for most porous. With top trade brands available, offering great quality products, you'll be able to continue working even on the. These products enable a way to effectively aid in water removal as well as keeping other area’s watertight. waterproof render. 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. Most can be used on all common surfaces, and as a decorative trim or door paint. com. Nail straight pieces of timber vertically & horizontally as required to external corners, window & door reveals. FREE next day delivery available, free collection in 1. Extremely durable and will adhere to any substrate for filling and repairs with no depth limit. 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. 49Inc Vat. There is a white crystal deposit under left on the exposed render. Sets in 20 minutes. com. Will not corrode steel reinforcement (brick ties etc. 5/5. DIY_Has123, Feb 3, 2021. If in the top coat the waterproofer or water resistance(r) may/fail and then damp has every chance of getting through. 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. com. FREE Click & Collect within 30 minutes. 99. thanks gent. Overcoat 48-72 hours after application with any standard water-based masonry paint or mineral. Product Type. 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. 3/when dry, three coats bitumen. Use on brick, concrete and stone. Order online at Screwfix. 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. Good shout? Also, not location of air bricks. For picking up 1" use two coats of 1/2" each. Big Jumbo, Jul 27, 2009. Delivery Next day available. Give them a good scrub or pressure wash and tidy up the pointing. Developed to repair damaged masonry between brick and stonework. e. 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. 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. I have heard i need building paper and mesh before i render. Waterproof. If I render with febond sbr sand and cement render then I can use 10mm travertine tiles. The formula is solvent-free, making it more environmentally friendly by reducing pollution. Just. Most if not all are painted with mansonry paint, (Specialist applications excepted, eg.