when i removed the old wood it crumbled so i pulled it all off. waterproof render will work however yoy need to overcome the possibility of presure pushing the render off. Dried clear. 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. PVA wall first. £9. 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. Anti-Crack Acrylic. + silcone the windows. Hi Guys. Breathable masonry paint is essential for waterproofing your exterior bricks while allowing moisture to escape from inside your house. Click & Collect. From what I’ve read on this very helpful forum, it’s a water/salt problem. chillimonster Screwfix Select. 8m)above newly-fitted french doors to render. 5m x 0. Scratch coat is 1 part cement, 1 hydrated lime, 5 plastering sand, with fibreglass mesh embedded. Hello. If you don`t want waterproofer at least use a plasticiser or lime. 4 use mechanical fixings to fix this system to the wall. com. Contains enough to waterproof a standard sized shower. Click & Collect. The lime render was there for a reason, its breathable, lobbing in cement isn't a good idea, it may cause problems with moisture depending on the wall, you can buy a lime render mix. Bostik Waterproof Cement Grey 10kg (58196) Bostik Waterproof Cement Grey 10kg. #4. Now I am intending to use cement, sika waterproofer and sharp sand and render this wall. Not available for delivery. com. • High water and rain resistance • Water reducing • Provides long term water protection• Chloride free New Sika sku available (code 98821)Long term water protection to mortar, concrete and rendering. Screwfix Community Forum. Also with spring weather being variable in temperature, would you recommend covering. That will last. What mortar mix, 3:1? ArthurFirstly internal walls do not need rendering with sand and cement but a base coat of plaster is used instead such as Bonding or Browning. Screwfix Community Forum. SKIP19C THOMPSONS WTRSEAL ULTRA WTRPRFG. 5/5. Free returns. Totally forgot as was so busy myself and only had a spare few days to do it. Screwfix Community Forum. com. The fact that it's a retaining wall means that it's going to be damp, almost by definition. Screwfix Community Forum. Extremely durable and will adhere to any substrate for filling and repairs with no depth limit. Need to render an external wall or building? The Everbuild 507 Rendagrip bonding agent will help ensure your render sticks firmly to the desired surface. Been in exact same position 20 years ago, building control wasn't happy with the so called waterproof render on a small extension, I had to run a disc cutter along the line of the damp coarse and fill it with mastic. #2. Hi, My extension was built and rendered using a sand/cement render around 4 years ago. 4/immediately the last coat is on and while still wet, blind with sand. Ideal for emergency repairs, filling and patching. 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. Protect and reinforce joints. Removable Grid Supplied. This process is best carried out using a pumping system and water fed pole with a brush attachment. sharp is for screeding. I intend to apply sandtex stabilising solution and then sandtex fine texture paint which say's it has a breathable waterproofer in it. Read more. After that, 2 topcoats of a good quality masonary paint, and job done. Screwfix customers rate this product 4. Nail straight pieces of timber vertically & horizontally as required to external corners, window & door reveals. Weberend One-Coat Base Render (OCR) is a versatile pre-blended single coat application render, ideal for rendering brickwork, blockwork and concrete. only one left wet. Screwfix Community Forum. Use plasticiser on both coats. Choose from top trade brands. Does any one else have the nightmare of render falling off in patches once the. Advice on mix varies. 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. Click & Collect. Asked at the garden centre, what to do to stop it soaking in. I usually rule it off,fill the hollows and then leave it until it starts to get firm (dependent on the background I know). Provides a hard wearing, protective layer on wood, metal and cement. 99 Inc Vat. Pieces in Pack/Case. 99 Inc Vat. Cemenmt render will dmage the wall eventually - its not ok to do it. 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. Waterproof. Buy Roof Repair Products at Screwfix. Click & Collect. Charlie Far!ey New Member. unfortunately came home yesterday and all covered in scratch coat with no waterproofer. Primer Not Required. 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. Sika Proof improves the impermeability and absorption. Low Odour & Solvented. May produce an allergic reaction. Covers Approx. Fill holes and cracks with ease, suitable for many applications. 69. FREE next day delivery available, free collection in 1 minute. com. Volume. 5 Ltr. Prepare walls by straightening them out with a two coat render system and a waterproofer agent added to mix. Sika Waterproof Coating Grey 5kg (83502) (67) compare. Items are easy to install and use while. Low Odour & Solvented. Product code: 252325. 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. Hi there, I need to find a suitable, waterproof render for a wetroom. I have used a slurry coat first of. 88 Inc VAT-+ Add to Basket. Forms a transparent, waterproof barrier. 90min Approximate Setting Time. OK. Buy Multi Purpose Fillers from Screwfix. One Coat Render can be used For interior and exterior use and has been formulated for single coat. Screwfix customers rate this product 4. Order online at Screwfix. 3) waterproof paint the bottom exposed brick. Colour coded for easy identification. Tapes suitable for a range of materials stocked. #2. 5mm plasterboard to the wall, and then skim. I have a small area (2. 4m²/Ltr. 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. We are ready for your call 24/7. I know when we do the top coat it's gonna suck the moisture out like crazy. Rapid-setting waterproof cement. £9. 1 remove lose stuff. Suitable for interior and exterior use. Cmd38 New Member. High Bond Strength. Discussion in ' Builders' Talk ' started by Fussy Spark, Dec 27, 2020 . Screwfix Community Forum. After starting he informed me that. waterproof render. all the best. the walls are new, 3 weeks old. the problem comes because one of the old walls has the damp course below of extension. Bostik Concrete Sealer 5L. The shed is 5m x 2m high & has 2 end walls about a metre wide. Charlie Far!ey New Member. Most can be used on all common surfaces, and as a decorative trim or door paint. Buy Aggregates & Chemicals at Screwfix. Â New Member. I am also used 3:1 evermix plasticizer / waterproofer / retardant in the mix towards a strong ratio. The render on the outside should waterproof the wall anyway. PermaSEAL 3 Damp Proof Membrane Kit 10m². Order online at Screwfix. At certain points the garden is upto a foot higher than. High bond strength. Walls are old super dense concrete blocks. High performance waterproof treatment for exterior porous surfaces. 41 Per unit £0. Order Bostik SBR Admixture White 5Ltr at Screwfix. Option No. com. Low Odour. If you are going ot paint it, use a Stabiliser solution first to prime the render then apply two coats of a good masonary paint and you shouldn't have any problems. (the actual water drainage path, which looks like its made of half a sewer pipe is actually in good condition, so its only the. It failed in one area, and cracked off the wall. It's all more controllable, and the 'plaster' ain't setting before your very eyes sending you into a blind panic. PVA is a water-insoluble resin which is typically white at the point of application, but dries colourless and has a high bonding strength. Grey. Designed to be used for plasterboard internal corners. Bonding is not a good idea on external walls, it attracts water to it. You can do it. 250 cement board. your. It sets to a rock-hard finish and can be overcoated in 24 hours. Find your nearest Screwfix store and up to date opening times. Protecting from rain, frost, ice and snow, this product is ideal for providing extra protection to your home's exterior. Wall fillers and flexible fillers create a clean smooth and professional finish. This is especially important if you apply a thick traditional multi-coat plaster. Discussion in 'Builders' Talk' started by Gary hunt, Oct 23, 2016. For Fixing, Sealing & Binding. Wire brush the exposed walls to be sure that there is no mould on the. Easy to shape and can be used on a variety of rough masonry surfaces including cement, concrete, breeze blocks, bricks and stones. Delivery Next day available. I've slapped a PVA solution to brickwork on internal walls prior to render, I GUESS that this situation is no different. The 2nd. Waterproof a leaking roof. FREE next day delivery available,. Product Type. 3N dense concrete blocks. For extra certainty use a render bonding agent such as Sika Rendagrip as a priming coat. Apply a bitumen or Pitch Epoxy coating from the outer edge of your 'slope' all over the existing dpc and up the wall 150mm. Order online at Screwfix. Product code. £32. As well as waterproofing, this product also helps to prevent condensation and efflorescence, keeping structures in great condition for longer. I'm putting a corner shower into the bottom floor (concrete pad) of my house. Softwashing is the best way of cleaning your render. It incorporates a Polymer bonding aid allowing the results. Waterproof render (sika 1) on the walls and d&d insulated plasterboard. the waterproofer will not work!!!!!the top coat must be at least 6 parts WASHED sharp sand 1 part lime 1 part cement {opc}. you can hose down the scratch coat just before you. Page 1 of 2 1 2 Next > Gary hunt New Member. Is either expanding foam, or white silicone OK in this situation (inside of course, render with waterproof mix on the. Sharp sand coarse and fine, lime and cement in 2 : 2: 1 :1 ratio for bottom coat ( scratch ) coat, with waterproofer. com. Shapeable to Repair Without Formwork. Over 40,000 products. cautious New Member. The proceedure is:-. common sense tells you that this system will go nowhere and it wont. FREE next day delivery available, free collection in 1 minute. Product information. 1:20 rather than the more dilute 1:40 option. Cement based coating for preventing water and damp penetration in walls and floors. Softwashing Render. She got the guy back and he said 'oh well, it hasn't worked, you need the place tanking which. 6 January 2021 at 10:22PM. Render should be fully dry after a few months,doubt they added a water proofer to render, then it will soak up then rain,& then need to dry again, endless cycle. Ideal for emergency repairs, filling and patching. Using a small grinder, cut out all loose chunks of render - & open all sketchy cracks. Weather-Resistant. Float at 5:1:1 Builders sand : OPC : LIME with waterproofer in the water How does that sound? 2. im rendering onto concrete blocks on the outside of my new shed/workshop. Cement-based, rapid-setting flexible adhesive. Thread by: Crooky, Jul 4, 2021, 2 replies, in forum: Builders' Talk. With top trade brands available, offering great quality products, you'll be able to continue working even on the. Deme23 New Member. Come back the next day if you like, and see what sort of waterfall you have running down the back of the wall. Discussion in ' Builders' Talk ' started by roger waters, Sep 11, 2006 . I know I need to attach mesh to the surface, but a friend has told. Most external decorative renders are painted, most have a combined waterproofer and plasticiser addidive in last coat. 5. Waterproofs Plaster, Plasterboard, Plywood, Render & Concrete. Give them a good scrub or pressure wash and tidy up the pointing. com. FInish with horizontal scratches for a key. Buy Cable Sleeving at Screwfix. Delivery. I've heard bad things about Sika, re: not being suitable for moxing in a cement mixer: online at Screwfix. Supplied in a graduated bucket. £3. This would be better off in plastering forum. Product Details. This is your 'drip-tray' separating the above and below dpc areas. Water & Weather-Resistant. Rapid-setting waterproof cement. . £13. Is unibond OK 2. Inc. Goddo New Member. Page 1 of 2 1 2 Next > Thread Replastering around doorframe with very uneven brick walls. com. 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. Soudal Repair Express Plaster Filler White 250ml (125RG) (4) compare. 48. Not available for delivery. This not painted at the time as suspected water ingress problem however this issue now resolved. Evening guys. i have a freshly scoured brick wall, having recently removed half an inch of old powdery paint layers. Suitable for brush application only. But I'll have a go. ★★★★★ ★★★★★. com. Sika 1 Waterproofer is an aqueous solution containing complex colloidal silicates. 30 day money back guarantee. 'A' way to do it is this. Ka Tanking Slurry Waterproofing Solution Grey 25kg. • High performance waterproofer. • Gives coverage of approximately 2 – 4 m² per litre per coat. Stops penetrating damp on brickwork and masonry. £6. Render up to (or very slightly below) the damp course, finishing with a 25° slope down and outwards from the dpc. Suitable for new or renovated substrates, either unpainted or painted: gypsum plaster, old painted surfaces, cement, concrete, breeze blocks, bricks, stones, glass and glazed tiles. too much suction 4:1 will do you. They have for example render products which are waterproof, yet breathable. drill driver New Member. On dense, less absorbent brickwork or render, coverage of the brick waterproofer can be increased by up to 10m² per litre. ex. I would get your render on soon so the block work can dry out. 1 remove lose stuff. If I render with febond sbr sand and cement render then I can use 10mm travertine tiles. 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. You might wonder why you need two (or more) coats. 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. Use on Plasterwork, Skirting Boards, Windows & Door Frames. qwas123 Screwfix Select. If you wait then water will get in behind it and more and more will fall off. Delivered by our approved supplier, Find out. Will this be enough. Offers long term durability with no gusting wind noise. PVC Construction. That allows the material to be worked easier but as you may be aware render doesnt take a lot of working before it falls off the wall. ssss64 New Member. £3. Read more. I have been trying to use sand and cement with waterproofer (everlast) to level it out but unsure if I'm doing it right. Ideal for Use in Basements/Cellars but may also be Used as an External Coating for Concrete, Brick, Block & Bonded Renders. 45 Inc Vat. 5m x 0. Mr. 80. Dow 791 Weatherproof Silicone Sealant Anthracite 310ml (44836) (42) compare. Depending on the ratio you used for waterproofer/water in your mix you should find that the render is virtually weatherproof. For Interior & Exterior Use. The front apex has often shown signs of water ingress as the mortar lines underneath are often visible after heavy rain. Extremely durable and will adhere to any substrate for filling and repairs with no depth limit. The pointing needs raking out 25mm deep, and re-pointing with a 4:1 sand & lime mix. Primer Not Required. Apply Water Seal directly onto damp surfaces to provide long lasting waterproof protection within hours. waterproofing paint. Sets in 20 minutes. 100% Polyethylene Construction. (former damp problems)And install 22mm insulated plasterboard over that. Touch-Dry in 6 Hours, Fully Dry in 24 Hours. Suitable Application. Handyandy, Oct 23, 2005. For Interior & Exterior Use. Discussion in 'Builders' Talk' started by Victor Lek, May 24, 2022. Handyandy - really Mr. You can use this all-in-one primer and sealer to form a waterproof layer on outdoor surfaces such as concrete, lightweight. 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. Quick-Dry Stabilising Solution. PayPal accepted online. 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. com. Product code. I don't trust my builder and although he assured me he put waterproof additives within the render I do not believe him. Depending on the ratio you used for waterproofer/water in your mix you should find that the render is virtually weatherproof. Contains primer, coating and waterproof jointing tape. And all this after the walls were skimmed and painted. Bostik Cementone General Purpose Mortar 5kg. They do say that a suitable bonding agent could be applied prior to the render scratch coat. Render Waterproofer. Paint it on and when its dry, do it again, as the wall has sucked all the moisture from the render that you had put on earlier and that is why it's 'crumbly'. Light Grey. The render would or should have had a waterproofer added to the mix when rendered so it will be waterproof, as the render is new it is not necessary to apply a stabilising solution first, just use a hand brush to go over the surface to remove any dusty muck off the surface. I intend on having the front of the wall rendered so it is important that it is sealed correctly. Over 40,000 products. Volume. Designed for use in fully. Order online at Screwfix. Click & Collect. Choose this handy pre-mixed sand and cement render from Weber to cover brickwork, blockwork, concrete and other suitable surfaces. blertsville, Jul 4, 2011. At minimum, the rear of HardieBacker® 250. Suitable for new or renovated substrates, either unpainted or painted: gypsum plaster, old painted surfaces, cement, concrete, breeze blocks, bricks, stones, glass and. more damp comes through i would like to waterproof the render. 7 litres of SBR per 25kg bag of cement to give a totally waterproof render. That's not to say lets seal the moisture in the bricks. This ready to use Sikagard facade from Sika is a water based impregnation emulsion. You shouldn't use PVA for external render however they do make an external grade one but this isn't necessary. Includes 2 Countersunk Screw Holes for Workbench Fixing. com. Phil the Paver Screwfix Select. Simple to use, just mix with water. The waterproofs range offers you a selection of colours and sizes to suit your needs while keeping you dry throughout your working day. Any thoughts anyone? Plumbcrazy,. You shouldn't use PVA for external render however they do make an external grade one but this isn't necessary. 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. Use stainless steel bellcast/render stop beads as req. It produces a superior. roof king, Sep 17, 2010. Exterior rendering is, I think, a more manageable beast that, say, internal skimming. PVA Sealers. UK call centre ready for your call 24/7. 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. Totally forgot as was so busy myself and only had a spare few days to do it.