Tarmac One Coat Render is a pre blended render that can be applied in one coat for patch repairs or larger rendering projects. the walls are new, 3 weeks old. My builder is suggesting cutting 100mm of it away at the bottom to let it breath. View all: Sika Waterproof Sealants. This time, its butting up against 12mm plasterboard (painted) which was dabbed directly to the brick (no render). 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). 4 use mechanical fixings to fix this system to the wall. £6. Use a firm hand to. Weber One Coat Base Render 25kg. Slow setting time makes it ideal for covering large areas in one application. The fine aggregates are suspended in a unique waterproof polymer to ensure easy application by roller or brush. com. Finish second coat with sponge or wooden float. Do what the gardener should have done. 8. For Interior & Exterior Use. External wall is rendered. 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. Bostik Cementone General Purpose Mortar 5kg. I use to put waterproofer in both coats, but some peeps on do scratch coat. View all: Thompsons Water Seal. Recycled Polypropylene Construction. com. Hi, I have an 1910 solid brick, no cavity built house that is all pebble dashed. Will this be enough. The paint has been fine until this very wet spring, when it started to bubble and peel in large random areas. 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. 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. The wall is not tanked with any waterproof membrane. (76 products) Aggregates and Chemicals are the components of a composite material which will resist stress providing a bulk to the composite material. #2. I know this is not the best route to go in waterproofing a wall normally. Render mix. Also for repairing cracks and damaged stone edges. Frame sealant is flexible and designed to withstand UV, weather and water exposure. com. Choose from top trade brands. you can use it for rendering but it's much more difficult to rub up. Presume you have slope away, try to start with nothing at dampcourse (should remain below dampcourse). Mr. thanks gent. Charlie Far!ey New Member. Ricky Johnson New Member. good heavy scratch will help to reduce the suction, dont leave the floating coat after the scratch too long, very important that you reduce the suction or your scratch will turn to dust when it dries out too fast. Weather Shield say leave it until Spring. I understand that the waterproofer will do what it says on the tin, but only if in the first coat and then covered by another coat of render. Chemical dpc's are used as a cost cutter and are not really as good as people make you believe. Suitable for ceramic, porcelain and non-moisture. The wall has been constructed out of 7n concrete breeze blocks and before i backfill i need to waterproof, it needs to be plant friendly. Coverage per Litre: 6m²/Ltr. waterproofing paint. Product code. cautious New Member. #2. 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. Sika Waterproof Coating Grey 5kg (83502) (67) compare. #10. Buy Plastering items from Screwfix. Waterproofer in Render? Discussion in 'Builders' Talk' started by TDav, Sep 9, 2018. But i have a job to do, and i am considerong using sbr bond on it first, as im always interested in new methods. FREE Click & Collect within 30 minutes. I am after some advice if poss. My qustion is: Will I need to use a (waterproofing?) additive to the render mix, particularly for the inside surfaces of the drain. Buy online & collect in store in as little as 1 minute. 99Inc Vat. unfortunately came home yesterday and all covered in scratch coat with no waterproofer. View all: No Nonsense Water Seal. Screwfix customers rate this product 4. Can anyone tell me which is the best silicon based waterproofer they have used for waterproofing an exterior stone wall. Home Forums > Screwfix Community Forum > Builders' Talk > Is Artex Render Waterproof? Discussion in 'Builders' Talk' started by DIYDave22, Nov 8, 2023 at 5:34 PM. Screwfix customers rate this product 4. This is an interior wall but yes its a wall with a window and other side is exterior. Screwfix Community Forum. Easily secure a wide range of applications in place. + fill all gaps with new expanding foam. FREE next day delivery available,. 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. £8. 99 Inc Vat. SKIP19C THOMPSONS WTRSEAL ULTRA WTRPRFG. but the render is now well past its sell by date & is dropping off in lumps. Suitable for the damp proofing of interior masonry wall surfaces. This would be better off in plastering forum. The problem I am having is that the waterproofer in the scratch coat is not allowing the finished coat to go off for up to 8 hours ( wall in shade. Waterproof. No waterproofer in render scratch coat. 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. For External Use. PAGE 1 OF 2. It is a solution for nothing. DIYDave22 New Member. The paint has been fine until this very wet spring, when it started to bubble and peel in large random areas. On dense, less absorbent brickwork or render, coverage of the brick waterproofer can be increased by up to 10m² per litre. 4) Remove the damp plasterboard internally, remove the wet sand, waterproof paint the brick internally and. ie. With 10mm for the scratch coat and 8mm for the top coat. 99 Inc Vat. Pieces in Pack/Case. Hi, My extension was built and rendered using a sand/cement render around 4 years ago. This would improve the temperature somewhat, reduce any condensation and also allow the wall to breathe thanks to the studded membrane. VAT) Quick. 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. 1 remove lose stuff. ALlow to dry for 4 or 5 days and then finish with a render of 6:1:1 rendering sand:cement:lime. blertsville, Jul 4, 2011. Screwfix customers rate this product 4. You must be 18 years old or over to buy this product. Rendering of chimney. Doozergirl said: In a word, no. What depth should the battons for the scratch coat be? I was looking at 10-15 mm deep off the wall. 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. 30 day money back guarantee. #3. Buy Cement Mix at Screwfix. don't pva the wall either first coat with waterproofer in and second coat with waterproofer in also. FREE next day delivery available, free collection in 1 minute. For a clear coating over bricks to allow. Screwfix customers rate this product 4. 5. 49 Inc Vat. Â New Member. rogerk101 Screwfix Select. The biggest problem with a single-skin external wall is condensation which most people confuse with rising damp. 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. Click & Collect. 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. Buy Cement Mix at Screwfix. PVA Sealers. 25 Year Waterproofing from a Single Coat . It's a concrete block wall, approx 600mm high. Total Product Weight. Click & collect in stores nationwide. From what I’ve read on this very helpful forum, it’s a water/salt problem. 1/ clean all walls of loose material. Contains primer, coating and waterproof jointing tape. Thermalite hedge their bets somewhat on their finishes section. 8/5. Order Sandtex Quick-Dry Stabilising Solution 5Ltr at Screwfix. Render Waterproofer. After that, 2 topcoats of a good quality masonary paint, and job done. Suitable for interior and exterior use. drill driver, Jun 21, 2005. 41 Per unit £1. Hi Guys. 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. 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. Product Type. Touch-Dry in 6 Hours, Fully Dry in 24 Hours. Discussion in 'Builders' Talk' started by Pagloss, Apr 6, 2006. Nail straight pieces of timber vertically & horizontally as required to external corners, window & door reveals. Home Forums > Screwfix Community Forum > Builders' Talk > Waterproofing. 12-16m²/Ltr. Use a waterproofer additive. Use on exterior house and building walls, on concrete and brick built surfaces. £49. Extremely durable and will adhere to any substrate for filling and repairs with no depth limit. Good luck. Effective sealer for waterproofing damp walls. They have for example render products which are waterproof, yet breathable. Strong fibreglass mesh tape that helps reinforce plaster coating and protects it from cracking. Febtank Super. Will depend on the type of silicon, and will only work with oil based paint. Discussion in ' Builders' Talk ' started by Fussy Spark, Dec 27, 2020 . Buy Jointing Tape at Screwfix. Suitable Application. 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. I’m doing the patio and the intention is to fill the void. Light Grey. 80/Ltr)I am building an outdoor kitchen for gas bbq etc. right quick little question, got to render gable end of a house. 3. Phil the Paver, Nov 22, 2014. PAGE 1 OF 2. , Feb 26, 2008. The wall is an external leaf, subject to high prevailing salty winds and has had dampness for years. Hazard safety codes: Xi, R36, R38, R52, R53. If you are in a bit of a wild area, then consider epoxy - two-pack - masonry paint. They do say that a suitable bonding agent could be applied prior to the render scratch coat. shazauk New Member. more damp comes through i would like to waterproof the render. very big difference. I know when we do the top coat it's gonna suck the moisture out like crazy. • Gives coverage of approximately 2 – 4 m² per litre per coat. General purpose, solvent-based. Mr. You can use metal beads for all windows and angles and drip beads for your bell. £ 24. FInish with horizontal scratches for a key. whats a good method to clean off the scratch coat which has been exposed for some years and is. Not available for delivery. 90min Approximate Setting Time. Im an old skool plasterer ( 34 years old ) And when i am rendering i use sand,cement and waterproofer/feb. Hazardous Product – Not available for Mail Order/ TCND outside of Mainland UK. 1. Use a bitumous tanking primer on the clean stone internally and throw gritty sand at the wet black jack for a key when dry. These products enable a way to effectively aid in water removal as well as keeping other area’s watertight. Order Thompsons Drive Seal Black 5Ltr at Screwfix. Tarmac One Coat Renders can be applied with a trowel of float. apply the sand and cement to above 1/4 inch of the existing. For Interior & Exterior Use. I would appreciate a little advice on the making of the waterproof render,thanks. Click & Collect. Screwfix Community Forum. 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. Waterproof PVA. I've attached some images. Thanks for the help Alastair. A complete crystalline solution for waterproofing masonry and blockwork. Weather-Resistant. Screwfix Community Forum. By doing it this way you have. Product information. Sandtex Ultra Smooth Masonry Paint Pure Brilliant White 10Ltr (23771) (573) compare. Scud the wall first with 1:1 sand/cement next day dampen down before rendering with the hose, thermalite are a pig to render unless you are quick. Home Forums > Screwfix Community Forum > Builders' Talk > Damp wall render. final coat of render needs to. BS 4887. 99. Contains enough to waterproof a standard sized shower. 5/1 sand & cement if the house is that old i would add a waterproofer too. Breathable masonry paint is essential for waterproofing your exterior bricks while allowing moisture to escape from inside your house. 1. Items are easy to install and use while. 74/kg quantity Collection Set Store. FREE next day delivery available, free collection in 1 minute. Dried clear. Simple to use, just mix with water. the waterproofer will not work!!!!!the top coat must be at least 6 parts WASHED sharp sand 1 part lime 1 part cement {opc}. Delivery. weakening its bond with the brickwork/render. Hmmm, that could look impressive. I intend to apply sandtex stabilising solution and then sandtex fine texture paint which say's it has a breathable waterproofer in it. Asked at the garden centre, what to do to stop it soaking in. Bostik Concrete Sealer 5L. Neosparks, May 30, 2006. £30. £26. Sika Bond SBR+ Waterproof Bonding Agent and Mortar Sika Bond SBR+ is a one component, water based, general purpose, styrene butadiene rubber emulsion bonding agent and mortar admixture. 80. TDav Member. 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. If the wall is dry (unlikely this year!) lightly damp it without soaking it completely before applying the. And all this after the walls were skimmed and painted. 3) waterproof paint the bottom exposed brick. 99 Inc Vat. I would get your render on soon so the block work can dry out. #4. 1:20 rather than the more dilute 1:40 option. . com. Only way to test if it's still wet is with a moisture meter. A-. PAGE 1 OF 2. 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. This not painted at the time as suspected water ingress problem however this issue now resolved. After starting he informed me that. 99 Inc Vat. Click & Collect. KIAB Super Member. Order Bostik General Purpose Mortar Grey 5kg at Screwfix. Light Grey. 4m²/Ltr. Fillers and Putty are used to fill or seal holes, cracks, or gaps prior to further decorating. Is unibond OK 2. This time, its butting up against 12mm plasterboard (painted) which was dabbed directly to the brick (no render). all the best. Hi, My extension was built and rendered using a sand/cement render around 4 years ago. He rendered approx two square mtres at a time before applying dash. Fill in gaps. 24 kg. too much suction 4:1 will do you. General Purpose Mortar. 19 each (Inc. There is a white crystal deposit under left on the exposed render. 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. 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. If others have done it - then they have done the wrong thing. Can be used for rendering, roughcast, pebble dashing, harling and above ground waterproofing. £ 21. £ 14. 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. Buy Ready Mixed Plaster at Screwfix. fillyboy Screwfix Select. 2/ render the walls. VAT. Give them a good scrub or pressure wash and tidy up the pointing. com. (£1. waterproof render. 4 use mechanical fixings to fix this system to the wall. I intend to apply sandtex stabilising solution and then sandtex fine texture paint which say's it has a breathable waterproofer in it. Screwfix Community Forum. So you need to fit a waterporoof membrane undernearth your inner skin over the studding. cautious New Member. 1 remove lose stuff. com. Depending on the ratio you used for waterproofer/water in your mix you should find that the render is virtually weatherproof. We encourage you to debate the topics and issues of the day in a friendly manner, whether related to trade/DIY or not. Big Jumbo, Jul 27, 2009. Done a good job apart from i didn't put waterproofer in. There are specialist products on the market such as those available from Sika or Flexcrete which are technically advanced and suit this purpose. Ideal for emergency repairs, filling and patching. Click & Collect. Hello. Supplied in a graduated bucket. yesterday morning i put on a scratch coat, with rendering sane and castle cement ( ordinary portland cement it say in the bags) i used a 5-1 mix and i mad sure but using buckets, normally i would cut a bag in. We're getting a lot of confusing/conflicting information regarding painting it: How soon can it be painted (weather permitting of course, it's in Brecon) Sandtex tell me their products aren't compatible with PVA, therefore not to use it. OP, Now I can see why the fire wall and the stack have been rendered. I would then like to render it. PayPal accepted online. I intend on having the front of the wall rendered so it is important that it is sealed correctly. 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. Internal Skimming of conservatory walls. Building a stud wall with a damp-proof membrane and insulating it. Pieces in Pack/Case. the rendering is the easy bit. Free next day delivery available. Buy. There is a white crystal deposit under left on the exposed render. Suitable for 2. Don't listen to jim he doesn't know that hes talking about you always 2 coat all render, bricks also. Goddo New Member. Home Forums > Screwfix Community Forum > Builders' Talk > Rendering. Grey colour when dry. I usually rule it off,fill the hollows and then leave it until it starts to get firm (dependent on the background I know). The range has been hand selected from established brands, who manufacture durable products. Delivery. Ideal for Use in Basements/Cellars but may also be Used as an External Coating for Concrete, Brick, Block & Bonded Renders. 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. View all: Bostik Cement Mix. 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. View all:. £45. 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. Interior Wood Paints. (we could render the side but not the back). View all: Bostik Specialist Paints. Hi Guys. The fine aggregates are suspended in a unique. KIAB Super Member. The correct method is as follows:- 1st coat (scratch coat) 3:1 sharp sand with waterproofer and scratched. unfortunately came home yesterday and all covered in scratch coat with no waterproofer. Low Odour & Solvented. Two thin render coats. waterproof render. £11. #2. com. Handyandy - really Mr. Login to save for later. The old injection attempt has not worked, and neither has the inside attempt to render to 1m ht. £9. 1. Suitable for Water, Oils & Chemicals. Victor Lek Member. Product Type. 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. I’m leaning more towards K rend, as it’s silicone and. AC50 Trade Acoustic Adhesive & Sealant 900ml. Its faced brickwork which has been painted, plan is to bead it, mesh it ist coat 4:1 with waterproofer 2nd coar 5:1 no waterproofer. Primer Not Required. com. I have heard i need building paper and mesh before i render. 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. £13. there is a waterproof pva available which some say would work ok, but the consensus here is that either sbr or a sand/cement. Search Activating the button will move focus to the expanded search input fieldContains primer, coating and waterproof jointing tape. Product Details. Add for Delivery. Order online at Screwfix. Sika Proof Liquid Waterproofing Admixture is a general purpose, ready to use, economic waterproofing admixture for mortars and concretes. Soudal Repair Express Plaster Filler White 250ml (125RG) (4) compare. Then sharp sand fine, lime, cement in 6: 1: 1 ratio as top coat. 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. £34. the waterproofer will not work!!!!!the top coat must be at least 6 parts WASHED sharp sand 1 part lime 1 part cement{opc}. The shed is 5m x 2m high & has 2 end walls about a metre wide. OK. com. Most can be used on all common surfaces, and as a decorative trim or door paint. Will this be enough. £21. I am also used 3:1 evermix plasticizer / waterproofer / retardant in the mix towards a strong ratio. Its a painted concrete block wall, about 60m by 2m. Microseal Technology. Good Luck. £ 28. For interior and exterior floor and wall installations. qwas123 Screwfix Select. Time is of the essence as access is via scaffold in my neighbor's yard and they want it gone. Corrosion-Resistant. hi what is the best mix ratio for rendering internal wall . Sets in 20 minutes. 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. Mix approximately 4 to 5 litres of water per 25kg bag using an electrically driven mixer until you achieve a workable consistency.