G4 Pond Sealer is a moisture cured polyurethane which forms a non-porous seal on concrete rendered ponds, G4 pond sealer uses the moisture in the air and the render to harden, G4 pond sealer can be applied to slightly damp surfaces, but it is important that the render is sufficiently dry to be porous so as to enable the first coat of G4 pond sealer to bond and obtain a. 8/5. Order Bostik SBR Admixture White 5Ltr at Screwfix. The exterior is rendered and i'm pretty sure its trapping water in the walls and just driving it in. I'm no pro on this, but have done a lot of research into it. Contains enough to waterproof a standard sized shower. 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. 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. Discussion in ' Builders' Talk ' started by roger waters, Sep 11, 2006 . com. Offers long term durability with no gusting wind noise. In December I had a 2 foot earth retaining wall built in my garden to separate the garden from the patio. Home Forums > Screwfix Community Forum > Builders' Talk > Waterproofing. She got the guy back and he said 'oh well, it hasn't worked, you need the place tanking which. 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. Screwfix Community Forum. (£5. Scratch coat @ 4 to 1 & Top coat @ 5 to 1, I like to add fibre (adfil) to mix, gives a bit of reinforcing, prevents cracking,etc. Advice on mix varies. But overmix using Fairey and the mix becomes a foamy mass of bubbles with very limited final strength. 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. Bostik Concrete Sealer 5L. She got the guy back and he said 'oh well, it hasn't worked, you need the place tanking which. The inside of the wet solid walls seems to covered in wet sand and a black paint type substance as in the photos. If I render with febond sbr sand and cement render then I can use 10mm travertine tiles. Fixing sheets with tile adhesive, step 1. Cementone Freeflo Plasticiser is a retarding waterproofer and plasticiser. Fast-Drying. It failed in one area, and cracked off the wall. A waterproof render is more a damp proofer than a waterproofer. Rapid-setting waterproof cement. weakening its bond with the brickwork/render. If others have done it - then they have done the wrong thing. These products are suitable for use on a variety of materials and can be applied by hand with minimal tools. Leaving me a few mm to be skimmed. 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. Choose from rapid or fast set cement for small commercial or domestic jobs. Sometimes i use wire ( render lathe to all you young spreads ). final coat of render needs to. You can do it. Free returns. Easily secure a wide range of applications in place. Handyandy - really. It incorporates a Polymer bonding aid allowing the results. Thompsons Water Seal Clear 5Ltr (52043) (184) compare. 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 have waterproofer and unibond. So it'll be damp from behind (penetrating damp) and damp from below (rising damp), so not much to be gained by. 49. 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. Frame sealant is flexible and designed to withstand UV, weather and water exposure. com. 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. 8. 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. We were looking at using a product like K-rend up to the coping stones. com. • Drying time of around three to four hours. The old injection attempt has not worked, and neither has the inside attempt to render to 1m ht. Should you wish to brighten up these surfaces then use the Weathershield masonry paint system (old render may require a coat of stabilising solution first). Order No Nonsense Anti-Crack Acrylic White 310ml at Screwfix. Shapeable to Repair Without Formwork. Evening guys. 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. com. Fine. PVA wall first. Daveukleics Member. I will be hacking off and re rendering the whole house, The time between hacking off and rendering, will the house be no longer “waterproof” and get damp inside if it rains?I've done some DIY plastering, but have no knowledge of rendering, so would anyone be able to help me out with some info, please? The bathroom walls were originally rendered half-way up, and its so hard to remove, I would like to leave the existing rendering in place and just add new render the remaining top half. Mr. com. Choose this handy pre-mixed sand and cement render from Weber to cover brickwork, blockwork, concrete and other suitable surfaces. Sika Proof Liquid Waterproofing Admixture is a general purpose, ready to use, economic waterproofing admixture for mortars and concretes. 99 Inc Vat. Im nervous about it cracking so please can you confirm the correct mix to use. Click & Collect. apply the sand and cement to above 1/4 inch of the existing. 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. Screwfix customers rate this product 4. Quick-Dry Stabilising Solution. I intend to apply sandtex stabilising solution and then sandtex fine texture paint which say's it has a breathable waterproofer in it. more damp comes through i would like to waterproof the render. Use a coat of 2:1 sand cement with waterproofer followed by a 3:1 and then a 4:1 (all with w. Im an old skool plasterer ( 34 years old ) And when i am rendering i use sand,cement and waterproofer/feb. 5055492702975. 5°C. The paint has been fine until this very wet spring, when it started to bubble and peel in large random areas. com. For Fixing, Sealing & Binding. 40. Is Artex Render Waterproof? Discussion in 'Builders' Talk' started by DIYDave22, Nov 8, 2023 at 5:34 PM. External wall is rendered. 1 originaly and it was too rough to work with,managed to get 2 coats on 1 area straight away no probs. It is supplied in the form of a deeply penetrating cream that is applied to the wall surface using a roller or brush. Product information. Contains enough to waterproof a standard sized shower. 41 Per unit £0. £ 14. Hi i've built some raised flower beds / planters out of dense concrete blocks. After application by brush, roller or spray; Stormdry provides breathable protection against rain penetration on exterior weather-facing walls. PVA Sealers. I have used a slurry coat first of. High Bond Strength. Pieces in Pack/Case. com. Good luck. Effective sealer for waterproofing damp walls. Neosparks, May 30, 2006. The biggest problem with a single-skin external wall is condensation which most people confuse with rising damp. £34. Waterproofs Plaster, Plasterboard,. 99 Inc Vat. PVA sealer is an extremely versatile, odourless, waterproof and non-toxic adhesive that is suitable for a multitude of tasks and requirements. £45. waterproofing paint. but the render is now well past its sell by date & is dropping off in lumps. Febtank Super is a high performance tanking slurry for masonry and concrete. Water & Weather-Resistant. 5 Ltr. ★★★★★ ★★★★★. Additional information. Bostik Roof Repair Compound Black 1kg (57518) Bostik Roof Repair Compound Black 1kg. Product Details. today he's applying top coat with no waterproofer. Hazardous Product – Not available for Mail Order/ TCND outside of Mainland UK. Then sharp sand fine, lime, cement in 6: 1: 1 ratio as top coat. Click & Collect. Low toxicity. 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. Suitable for Water, Oils & Chemicals. Will depend on the type of silicon, and will only work with oil based paint. Screwfix Community Forum. 99Inc Vat. Will not corrode steel reinforcement (brick ties etc. com. Will fill without depth limit and repair without formwork. 8m)above newly-fitted french doors to render. Weberend One-Coat Base Render (OCR) is a versatile pre-blended single coat application render, ideal for rendering brickwork, blockwork and concrete. So I think the order from inside to outside should be:- inner skin, waterproof membrane, studding, insulation, blockwork and then your render. Delivery 7 days a week 60 days free credit available. Asked at the garden centre, what to do to stop it soaking in. The real question is is galvinised mesh ok. Read more. 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. 5 apply new finish. Ideal for Use in Basements/Cellars but may also be Used as an External Coating for Concrete, Brick, Block & Bonded Renders. Home Tags > waterproofer. On dense, less absorbent brickwork or render, coverage of the brick waterproofer can be increased by up to 10m² per litre. Mix it at 5-1 sand - cement with waterproofer. Inc. com. gauge everything put the water in the mixer then add the lime to the. With 10mm for the scratch coat and 8mm for the top coat. Hazardous Product – Not available for Mail Order/ TCND outside of Mainland UK. The rest of the building had bell beading so it was only about a 4 metre section I had to do. 35°C. Cemenmt render will dmage the wall eventually - its not ok to do it. B. Screwfix Community Forum. Order Bostik SBR Admixture White 5Ltr at Screwfix. Sika Proof improves the impermeability and absorption. com. I would appreciate a little advice on the making of the waterproof render,thanks. Suitable for brush application only. Buy online & collect in store in as little as 1 minute. Order online at Screwfix. What depth should the battons for the scratch coat be? I was looking at 10-15 mm deep off the wall. Hazardous Product – Not available for Mail Order/ TCND outside of Mainland UK. It is all studded then waterproof membrane & has expanded mesh over it and then its rendered. 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). 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. Home Forums > Screwfix Community Forum > Builders' Talk > Damp wall render. FREE next day delivery available, free collection in 1 minute. uk. Light Grey. Developed to repair damaged masonry between brick and stonework. com. 2nd coat (floating coat) 4:1 sharp sand with waterproofer as above etc. FREE next day delivery available, free collection in 1 minute. Home Forums > Screwfix Community Forum > Builders' Talk > Help with Rendering please Discussion in ' Builders' Talk ' started by mikethesmoke , Apr 26, 2009 . 90min Approximate Setting Time. Aggregates & Chemicals. It failed in one area, and cracked off the wall. Thanks for the help Alastair. Stops freeze thaw damage. 5Kg. 90min Approximate Setting Time. £3. If you do not want to change the appearance of these walls then use a masonry waterproofer (two coats). Wait a few minutes, feel the pva. Suitable for new or renovated substrates, either unpainted or painted: gypsum plaster, old painted surfaces, cement, concrete, breeze blocks, bricks, stones, glass and. Waterproof render (sika 1) on the walls and d&d insulated plasterboard. Buy Fixings & Fastenings at Screwfix. 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. Does any one else have the nightmare of render falling off in patches once the. Product Type. The fact that it's a retaining wall means that it's going to be damp, almost by definition. 30 day money back guarantee. KIAB Super Member. I have heard i need building paper and mesh before i render. Walls are old super dense concrete blocks. But I'll have a go. 1. Weber One Coat Base Render 25kg £18. £ 21. 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. Finish second coat with sponge or wooden float. Do what the gardener should have done. FREE next. PVC Construction. Light Grey. 5 apply new finish. 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. Free returns. Suitable for a Variety of Applications. It has many uses, and is suitable for most porous. Doozergirl said: In a word, no. You must be 18 years old or over to buy this product. Is 3:1 plasterers/rendering sand to cement correct for the scratch coat and what about subsequent coats? What's the maximum thickness of scratch coat and top coats?If you go for this option you'll need to render the stonework first to give you a suitable surface. This sealant is suitable for for repelling water on porous surfaces. Products reviewed by the trade and home improvers. 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. I now have a choice, either to continue with the original plan (not so keen on that idea now) or to re-point the worst bits and then apply a waterproof lime wash. 6/5. The shed is 5m x 2m high & has 2 end walls about a metre wide. com. Apply directly to damp surfaces. Most external decorative renders are painted, most have a combined waterproofer and plasticiser addidive in last coat. Learn more about Graphic Design Architectural Rendering | Victoria, BC. As well as offering protection, exterior wall paint improves the appearance of a property by brightening it up and bringing it back to life. Waterproof. 202 Integral Liquid Waterproofer is a liquid additive that provides long term water protection to mortar, concrete and rendering. Supplied in a graduated bucket. Click & Collect. Fill in gaps. 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. Depending on the ratio you used for waterproofer/water in your mix you should find that the render is virtually weatherproof. 5/1 sand & cement if the house is that old i would add a waterproofer too. Buy Aggregates & Chemicals at Screwfix. Thanks. Thompson's Water Seal uses a unique micro silicone emulsion to stop water penetration. the waterproofer will not work!!!!!the top coat must be at least 6 parts WASHED sharp sand 1 part lime 1 part cement{opc}. £18. Screwfix customers rate this product 4. Pieces in Pack/Case. View all: Bostik Cement Mix. normal bricks and most blocks, calls for a 1:1:6 mix for the scratch coat; cement, lime and sharp sand (3mm to fines). 99Inc Vat. 1st coat scratch 1:1:4 (OPC:lime:sand), 2nd coat 1:1:5. View all: Bostik Specialist Paints. 99 Inc Vat. very big difference. 1. 1:20 rather than the more dilute 1:40 option. £17. Extra grip, render bonding agent that contains a fine aggregate to provide an improved mechanical key before applying render on external. Float at 5:1:1 Builders sand : OPC : LIME with waterproofer in the water How does that sound? 2. Mixing: Add the SBR undiluted to the mix and then adjust the consistency with clean water. 99 Inc Vat. What do you reckon is the prime time to float finish render. unfortunately came home yesterday and all covered in scratch coat with no waterproofer. 74/kg quantity Collection Set Store. Screwfix Community Forum. General Purpose Mortar. don't pva the wall either first coat with waterproofer in and second coat with waterproofer in also. whats a good method to clean off the scratch coat which has been exposed for some years and is. Render up to (or very slightly below) the damp course, finishing with a 25° slope down and outwards from the dpc. We also don’t think it’s had waterproofing mixed in. Delivery Next day available. Bostik 1kg Cementone Colours for Cement - Buff (47) £9. That will last. Click & Collect. 1. Voltage Proof at 3000V. These products enable a way to effectively aid in water removal as well as keeping other area’s watertight. com. Cover to control drying - maybe damp down occasionally too. Provides perfect adhesion without the use of a primer, even on damp substrates. 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. . Totally forgot as was so busy myself and only had a spare few days to do it. com. Dow 791 Weatherproof Silicone Sealant Anthracite 310ml (44836) (42) compare. Discussion in 'Builders' Talk' started by questioner, Jul 6, 2007. Suitable Application. The garage is being used as a semi heated workshop hence the insulation, but I don't forsee any great generation of moisture within. £9. Step 6 – Apply First Coat of Render to Wall. £27. At minimum, the rear of HardieBacker® 250. Applying the board directly onto the membrane with thin adhesive and mushroom fixings. 99. . FREE next day delivery available,. co. 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. The wall is not tanked with any waterproof membrane. Mr. 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. Garage, garden, whatever. Home Forums > Screwfix Community Forum > Builders. 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. Phil the Paver Screwfix Select. PVA Sealers. 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. PVA is a water-insoluble resin which is typically white at the point of application, but dries colourless and has a high bonding strength. cautious New Member. (we could render the side but not the back). Fillers and Putty are used to fill or seal holes, cracks, or gaps prior to further decorating. This'll make sure it's drawn into the render to provide a nice primed surface. Ideal for emergency repairs, filling and patching. £9. This would be better off in plastering forum. This is an interior wall but yes its a wall with a window and other side is exterior. • 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. 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. Overcoat with any. I've heard bad things about Sika, re: not being suitable for moxing in a cement mixer: online at Screwfix. He uses plastering sand and cement mixed at a 3:1 ratio with waterproofer added, no lime or plastisiser. Can be used to seal joints between tiles, stone and brick slips and pointing around lead flashing. Forms a transparent, waterproof barrier. Use on Plasterwork, Skirting Boards, Windows & Door Frames. Waterproofer in Render? Discussion in 'Builders' Talk' started by TDav, Sep 9, 2018. Buy online & collect in hundreds of stores in as little as 1 minute! 30 day money back guarantee. Mix was about the same consistensy as for laying bricks. 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. Most if not all are painted with. Easy to shape and can be used on a variety of rough masonry surfaces including cement, concrete, breeze blocks, bricks and stones. View all: Sika Waterproof Sealants. £9. Air entraining – will not “flatten” the mix. 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 don't see why not to both questions. View all: Mapei Shower Waterproofing Kits. 99 Inc Vat. . Microseal Technology. Use it after clearing. Hello. 5m x 0. Apply with Brush or Roller. 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). . 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). Thistle One Coat Plaster 7. 7 litres of SBR per 25kg bag of cement to give a totally waterproof render. 45 Inc Vat. Waterproof render for external earth retaining garden wall!!! Discussion in 'Builders' Talk' started by oggie78, Apr 7, 2009. 1. com. Now I am intending to use cement, sika waterproofer and sharp sand and render this wall. Is there anything I can do now. A friend has given me some acrylic render (premixed tubs 25kg) which is a topcoat, and more than enough to do the job. Once dry then add a cup full per mix of neat sealer in the water. OK. 100% Polyethylene Construction. 3N dense concrete blocks. and the level of the intended patio is a brick above the existing damp course in that specific wall. There are only three walls as it backs on to to a neighbours shed. If it was my place I definately would not paint it. #2. Hi handy 007 1/2. Handyandy Screwfix Select. I wouldn't re-render - leave the bricks open to the air. • Air entraining plasticiser • Prevents shrinking and cracking during curing • Water reducing • Chloride freeMortar plasticiser for stronger, easier to use brick and block-laying mortar. right quick little question, got to render gable end of a house. Tarmac One Coat Renders can be applied with a trowel of float. Adhesives are used for bonding a variety of materials. VAT £6. 96 per L . It is a solution for nothing. 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. Login to save for later. If it could be dug down far enough then a waterproof render might be enough hallbeck, Jan 24, 2007 #3. 4 use mechanical fixings to fix this system to the wall. 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. ex. Using a small grinder, cut out all loose chunks of render - & open all sketchy cracks. 3) Use an additive in a render mix, like SBR to act as a total waterproofer for walls and ceiling, then lay the concrete floor as above. But it has no brick exterior wall. 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. Time is of the essence as access is via scaffold in my neighbor's yard and they want it gone.