Contact rockcote for more information on 0 736 668 or visit. However there is a few hairline cracks total of 5 spread over a stairwell, above the front door and 1 in the hallway and 2 below the window in the front room. You dont want to see any joints once the job is finished. Repair to cracks in blue board render service central quote. Repair to cracks in blue board render the exterior of our home is mostly rendered blue board. A nonshrinking, ultralight, readymixed filler and spackling compound. Render finish over fc sheet is a bad idea from the getgo. This will often cause cracks to run along the boards joints and can be clearly seen. Our masonry and concrete patching compounds are used to patch and repair concrete on walls and ceilings prior to painting or refurbishing. Dec 27, 2015 movement of the building by any of ways already mentioned. Gday, looking at buying a house with cracking evident in the render appearing in the blue board joins. Anyone know of a blue board manufacturer or whos responsible for meshing the joints before applying the render. These days you can find some very nice cladding boards from james hardie or scyon catalog, dont go vanyl.
Is it the builders job to seal the joints before rendering or the renders. Blue board most commonly used as an external wall cladding, blue board is a strong based 7. However there are a number of problems that could arise with cement particle boards if not fitted properly or if the incorrect render system is applied over it. I was going use textured paint to give a rendered effect, but after researching sites such as the blueboard makers hardie and watching a. We dont want to repeat brick on the extension and we ar. To make it easier, use an 11 trowel if you normally use bigger, as you will find it easier to push the render up onto the ceiling. In older house, lath and plaster ceilings may be countered, this technique was largely replaced by plasterboard in the 1950s. Mar 02, 2019 gypsum board comes in 4footwide panels. Available in a range of different sheet sizes, blue board is now a very common fencing material, and used often in courtyard. Another very common cause is the base plasterboard not being fixed securely.
Gives a smooth finish which dries fast and can usually be over painted with emulsion based paint within minutes. A demo on how to flush joins in blue board sheeting, this must be done before applying any render. The cost is significant, but the results can be stunning. You could tape the joints and the replaster the ceiling, but the cracks may still some back. Basically it is a system designed to protect cement renders and other substrates more information.
Dont do render on blueboard, it only looks good in first few months, later it cracks and looks terrible when sun hits it from side. The important thing for a high quality polymeracrylic render job over your blueboard or harditex base sheet is to get your joints flat to provide a nice smooth surface for your finished coats. We are currently getting quotes for a very large extension. Repairing historic flat plaster walls and ceilings old. Adheres to bushfire attack level requirements to bal29. The system uses gypsumcore panels that are the same size as drywall 4x8 feet, and specially made for veneer plaster. In your case because the cracks are opening up near windows and doors its more likely to be from building movement but you need to get the renderer back to have a look, he can advise. Paper is the most common backing, but aluminum foil backing is available as a vapor barrier where needed. Cracks in newly skimmed overboarded ceiling page 4. That is the reason it is very important that you take good care of your home and make sure you protect it from harsh climatic conditions. Discussion in plastering and rendering started by finch, 10 jun 2007.
They can be installed over furring channels to masonry walls or over old wood lath walls and ceilings. Hairline cracks in wall and ceiling plaster are not a serious cause for concern as long as the underlying plaster is in good condition. The crucial aspect is side lighting from your exterior walls. Sealing up cracks on the outside of your home is important to prevent rainwater from seeping in and causing rot and mold. First published in 1972, the white book is recognised as the leading specification resource for anyone specifying partition, wall lining and ceiling systems within the construction industry.
It is an ideal substrate for directly applied render finishes and can be used for exterior walls in ventilated systems,exterior ceilings and soffits. Rendering over cement particle boards cement particle boards or render boards are normally fitted on timber frame builds and then the rendering is normally carried out over the board. Dulux acratex is a stylish range of high build, granular and nongranular, 100% pure acrylic texture coatings. No nonsense instant plaster filler white 310ml multi. How to identify types of plaster, lath, drywall, beaver board, upson board as a guide to building age. I was going use textured paint to give a rendered effect, but after researching sites such as the blueboard makers hardie and watching a few youtubes, i thought i would give it a go. For cracks that reopen with seasonal humidity change, a slightly different method is used. Perfect render over 20 years experience we service all sydney region small jobs specialises in setting, granosite, acrylic render, rockcote, traditional render, and any of type of render as per customer request small jobs, repairs, cracks, drum, patch up, moisture prevention, renovations fully licensed renderer. How to apply blueboard cladding render kit home basics.
In terms of different types of render, bagging render is the cheapest. Rockcote polymer renders are highly crack resistant and can be used in interior and exterior applications. There is not a cracked ceiling in the entire house and never was until this new ceiling was fitted, i do know that all the ceilings in the house are. Differences between gypsum board and plasterboard hunker. The handwriting of the artisans, the taste of the original occupants, and the evolving styles of decoration are embodied in the fabric of the building. Suitable for application over properly prepared substrates such as brick, block, rockcote render, concrete. Vinly cladding or blue board with render somersoft. Ryley and danny install a huge double window to let the sunlight pour into. May 01, 2012 a demo on how to flush joins in blue board sheeting, this must be done before applying any render. Once it cracks you cant fix the crack, you have to render the whole wall again. Shrinkage cracks are small up to 2mm taking random directions appearing in plaster walls and ceilings, usually these are nothing to worry about as the main structure is still sound, these are basically classified as nonstructural cracks. Fire rating up to 60 minutes when used with hardiesmart wall. The house at the moment has ugly brick exterior which we plan to render.
There are numerous reasons as to why cracks can open up in new render. Hardies fibre cement is resistant to fire, termites, rot and damage from moisture. If paint are applied on it, without attending the cracks,the cracks shall be visible on painted surface. The boards are covered in woodchip paper and have been since i purchased the house in the 80s. Blue board rendering home is that perfect place of rendering where you and your family spend the most beautiful and funfilled time together. Blue board and plastering are underway, and bob gets quick tips from the pros on how to make the job go more smoothly. Originally strips of blueboard were used, with the traditional three layer plaster system as the finish. Discussion in adding value started by knightm, 2nd sep, 2005. From modest farmhouses to great buildings, regardless of the ethnic origins of the occupants, plaster has traditionally been used to finish interior walls. The white book for all partitions, wall lining and ceiling systems. Each render is composed of specially selected graded quartz sand with a pure acrylic. Applying a veneer coat of plaster over blueboard bob vila. Cracks in newly skimmed overboarded ceiling page 4 the. For thicknesses, these are the typical choices and uses.
How to apply blueboard cladding render applying cladding render to the blueboard i had installed on my steel kit home, was not my first choice. They may be filled easily with a patching material see patching materials, page. Sounds like no tape was applied, the plasterer may have filled bits in with adhesive and not taped the joints where the board and adhesive meet, i would get them back in to do it properly they should tape the full wall with some 1 metre wide fiber tape and replaster to sort it out. In the following floor plan interior condition, and taking into account that both surfaces render and gypsum will be paint finish. Plaster in a historic building is like a family album. The other method, is to overboard the ceiling, and then plaster it, but trying to rake out the joints, and just fill them is doomed to failure. The average residential home has about 400 square metres of exterior wall area. Free next day delivery available, free collection in 5 minutes. How to seal outside cracks on your home todays homeowner. Gunnail to timber frames or screw to light gauge steel frames. Blue board must be used with one coat plastering and is the preferred substrate for two coat plastering although sheetrock can also be used with two coat plaster but it does represent additional challenges to the plasterers.
A simple but highly effective method for giving a solid, rendered masonry look to your fibre cement sheet and blueboard projects. Each render is composed of specially selected graded quartz sand with a pure acrylic binder system and other proprietary additives. Known most commonly as blue board, the panels are covered with a special paper compatible with veneer plaster. Ideal for filling and repairing cracks and holes in walls and ceilings. Jun 26, 2007 i have started preparing bedroom number 2 for decorating and noticed a few cracks in the ceiling plasterboard, the cracks appear to be where the boards meet. Drying too fast, too much water in the mix or building movement are some of the reasons. Fire rating up to 60 minutes when used with hardiesmart wall systems. Movement of the building by any of ways already mentioned. Along with drywall, special blueboard was created that was particularly designed to hold up to the higher moisture content of a plaster finish. It has many fine cracks and 3 significant large cracks. It is a comprehensive guide to finding solutions using british gypsum products and systems.
When a ceiling required repair, it is important to understand. Knauf gkb 40 vapour barrier airtight layer 50 elastic sealant 1 50 31 40 3 30 1 2 40 x 80 40 x 60 abbreviations a spacing of the direct ceiling hangers mm. Even if the joins were covered with fibreglass tape etc. Here are some bizzare cracks appearing around window and door frames in my home. Repair to cracks in blue board render service central. Rendering cement sheet and blueboard walls with rockcote. Feb 01, 2012 sound at the end, here i have a job where all the joints had cracked so i repair, using the correct materials and my own best meathod i make the job look like new. Having cracks appear on your wall may just be a cosmetic problem, or it could indicate a more serious, structural issue. Sealing cracks also increases energy efficiency and lowers utility bills by reducing air infiltration into your home. Patching compound for cracks and holes 1 open up cracks by running the edge of a trowel or spatula along the crack and remove any loose particles or dust. Either way we now have a new ceiling which is cracking in several places which replaced a ceiling with no cracks so i am not at all happy with it. Most commonly used as an external wall cladding, blue board is a strong based 7.
I have started preparing bedroom number 2 for decorating and noticed a few cracks in the ceiling plasterboard, the cracks appear to be where the boards meet. Next fill in any hollows left over with more render. Rendering over cement particle boards external rendering. Then use a straight edge to screed, or flatten out, the render. While blueboard has the same makeup as drywall in the core, it is finished with a thicker blue paper that can accommodate the wet plaster. Rockcote acrylic polymer renders are pre mixed, 100% acrylic based renders designed to be flexible and lightweight. Top professional renovators put rendering high on their lists of. Looking at buying a house with cracking evident in the render appearing in the blue board joins. Intended to make the house look nice and fancy over the short term, but will never last. Cracking blue board join movement or render problem. Blueboard although these popular wallboard options are often discussed interchangeably, important differences exist between drywall and blueboard.
Jun 10, 2007 you will have no problems with it sand and cement sticks to bricks whether on a wall, ceiling or floor. Rockcotes patching and jointing compounds assist professionals to prepare just about any substrate including blueboard and fibre cement sheet. If your ceiling is plaster board,the cracks will more than likely be straight ones,usually following the main joists where the plasterboard edges should be fixed. Dulux acratex is the finished tinted product that you would see on the exterior walls of most modern exclusive homes picture above. Plaster ceilings explained lath and plaster or plasterboard. Repaper, but look for fibreglass or reinforced paper. Edges are beveled, rounded, tapered, square or even a tongueandgroove edge. A good indicator of structural damage is looking at how long and large the wall crack is. When the house is completed with the extension it will be a u shape. Youll see the hollows because of their lighter colour. Acrylic renders are especially suitable for application over fibre cement blueboard and painted substrates where tolerance to movement and good adhesion must be considered. Lath and plaster generally used up to the mid1950s.
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