houses, Uncategorized

Painting tips

Painting Tips from BPC Painters and Renovators

Drop-Sheeting The first thing on everybody’s list when you want to paint should be drop-sheeting. There is no such thing as a clean paint job and protecting adjacent surfaces should always be a priority. Make sure that everything that is not to be painted is covered and that the sheeting is held firmly in place by masking tape. Tools When it comes to the equipment you should buy to paint a house, there are a number of things you need: - Long-hair 'classic' roller – exterior walls - Polypile roller – interior walls and ceilings - 25mm, 50mm, 75mm brushes - 80 grit sandpaper for interior walls and woodwork - 60 grit sandpaper for course exterior walls - Scraper and speckle set - Turps and thinners - Caulking gun - Rags Exterior surfaces The best way to prepare the exterior surfaces when repainting is by using a high-pressure washer. The intense water jet applied over all the surfaces doubles as a cleanser and abrades the surface. When surfaces are dry and all blemishes are opened, you can prime open cracks to bind the possibly friable substrates. The appropriate filler is then speckled into the blemishes, allowed to dry and sanded to a smooth finish. The filled areas are then primed one final time. Paint for exterior surfaces When dealing with harsh weather conditions, one must apply a paint which maintains flexibility (from temperature fluctuations), is water and UV resistant, and maintains its bond to the substrates. There are a number of quality acrylic exterior paints on the market which claim to have these traits, but the current market trend is Prominent’s Neuklad. Plascon’s Wall and All is also a quality product. Quantities of paint The easiest way to determine paint quantity is to do the basic calculation of square metres to be covered (walk out a good stride to get a rough measure of a metre and multiply this by the height of the wall). Most paints will display the area covered by 1 litre on the packaging, but one can work with an average of about 7m” per litre. Types of paint Water-based Acrylic paint varies vastly in grade and type for application to all walls, ceilings and even roofs. Enamels are traditionally solvent-based paints applied to hard-wearing trimmings like doors, windows and skirting. They are however becoming more popular in their water-based counterparts, which provide better flexibility with fewer pollutants and easier clean-up. Preparing to paint The single most important aspect of painting is correct and thorough preparation for the substrates prior to painting. You can apply the best paint available, but if the preparation was not correct it will not perform. Dealing with problem walls When dealing with problematic walls ensure the following: - The masonry is moisture free - If the point of water ingress is determined, seal with suitable product and allow sufficient drying time - The walls are properly abraded (waterjet, scraping, sanding) and then prime the surface to bind - Use ONLY cement-based fillers like Polycell Masonry Patching Plaster that do not lose their integrity like gypsum based fillers ('polyfilla') when moisture is a problem - Prime the filled areas again when fully dry and overcoat with a quality exterior acrylic Number of coats On a raw wall (newly plastered) the standard coating system is 3 coats. That being a primer and two topcoats. When doing a repaint of a wall, blemishes are prepared, spot-primed and two topcoats applied over the entire surface. Colours Paint can literally be mixed in any colour imaginable; however, most of us want to stick to more natural tones for our homes. From white to off-whites and 'pastel' colours, these offer better UV stability than darker tones, show up blemishes and dirt less and will simply last longer in harsh conditions. Time it takes This will depend heavily on the conditions one is painting under with regards to atmospheric moisture, temperature, ventilation and sunlight. But you can roughly work on 2-4 hours for Acrylic Wall Coats and 4-8 hours for Enamels. Painting wood When it comes to the preparation of painting wood, there are a few things to remember. Raw wood will need a full coat pink wood primer, one coat universal undercoat, one coat enamel of choice upon drying, light sand with 100-150 grit sandpaper upon drying and a final coat of enamel. For varnished wood, one would use sand paper to remove gloss or shine and provide key, one full coat universal undercoat and two coats chosen enamel. The types of enamels one can apply to wood vary in finish (gloss/velvet/satin) and of course water/solvent based. Water based enamels are becoming more and more popular for all types of applications. Fascias Wooden fascia boards are prepared and painted with enamel and prepared as mentioned previously for wood. Fibre-cement-based fascia boards are far easier which can be coated directly with a quality exterior acrylic such as Plascon’s Wall & All. Gutters When it comes to gutters and the colour thereof, the norms are white or the colour of the walls. Also quite popular is that the downpipes and plumbing against the walls are done in the wall colour and as they link with the gutters against the fascia they follow the colour of the fascia (most often white). The type of paint used for gutters depends again largely on the substrate one is dealing with. For fibre cement gutters, PVC gutters and aluminium gutters, one would use Wall & All or similar acrylic. For any gutter coated in enamel a solvent based gloss enamel or undercoat and waterbased coating would be used. Painting tips provided by BPC Painters and Renovators. If you have any further queries visit bpcpainters.co.za or contact 021-946-4868 or Info.ct@bpcpainters.co.za. Image credit: David Ross