PAINTING EXTERIOR WALLS

Determining your product requirements
Measure area to which paint is to be applied. Depending on surface to which the product is to be applied, determine which products are needed. Check the Theoretical Spread Rates (TSR) on each of the specified products and see how many coats of each are recommended, then calculate what quantities of each product you will require, remembering to make adjustments for the porosity of each surface. TSRs are based on products applied to smooth, sealed surfaces. (e.g. an unsealed scratch plaster surface will absorb more paint than a sealed smooth one, so allow for a lower spread rate). Check out the specifications on all the top coat choices (referring to the relevant data sheets) and decide which is right for you. TSR = Theoretical Spread Rate | NC = Number of Coats | DT = Drying Time
Exterior Walls - Unpainted
If New Good Quality Cement Smooth Plaster or New Plaster after Paintcor’s Damp Proofing has been carried out below Damp Proof Course (D.P.C.) Surface Preparation Ensure plaster is dry and of good quality. Poor quality plaster (plaster that continues to release loose particles when brushed) must be sealed using Paintcor’s AcrySeal and not PlasterPrime. Brush plaster to remove any loose particles. Damp proof below D.P.C as per Tutorial 6 (New plaster) Application Method Apply 1 coat PlasterPrime to all new plaster to be painted. Allow to dry for 6 hours @ 25oC. Overcoat within 7 days. Over coat with 1 coat of Paintcor’s AcrylUnder or (if there are texture differences on the new plaster) SubTex and 2 coats of the top coat of your choice. Note: Should a desirable finish be achieved after application of the PlasterPrime, simply over coat with 2 coats of the top coat of your choice. Related Paintcor Products TSR = Theoretical Spread Rate | NC = Number of Coats | DT = Drying Time Undercoat / Preparation PlasterPrime - TSR: 12 - 15m² per litre | NC: 1 Coat | AM: Brush, Roller or Spray | DT: @ 25°C – 6 hours. Overcoat within 7 days. AcrySeal - TSR: 10 - 15m² per litre | NC: 1 Coat | AM: Brush, Roller or Spray | DT: @ 25°C – 30 minutes AcrylUnder - TSR: 5 - 6m² per litre | NC: 1 Coat | AM: Brush, Roller or Spray | DT: @ 25°C – 30 minutes SubTex - TSR: Ripple Roller: 3m² per litre. Sheep Skin Roller: 4.5 – 5m² per litre | NC: 1 Coat. 2 Coats if necessary | AM: Brush or Roller | DT: @ 25°C – 1 hour Top Coat Choices EleganceMatt - TSR: 8 - 10m² per litre | NC: 2 Coats minimum | AM: Brush, Roller or Spray | DT: @ 25°C ±25 minutes EleganceSilk - TSR: 8 - 10m² per litre | NC: 2 Coats minimum | AM: Brush, Roller or Spray | DT: @ 25°C ±25 minutes Essensual - TSR: 8 - 10m² per litre | NC: 1 or 2 Coats | AM: Brush, Roller or Spray | DT: @ 25°C ±25 minutes EnviroCoat - TSR: 10m² per litre | NC: 1 or 2 Coats | AM: Brush, Roller or Spray | DT: @ 25°C ±30 minutes Luxuriance - TSR: 8 - 9m² per litre | NC: 2 Coats | AM: Brush, Roller or Spray | DT: @ 25°C ±30 minutes Pristina - TSR: New Plaster: 4 - 5m² per litre. Painted Smooth Plaster: 7 - 8m² per litre | NC: 2 Coats | AM: Brush, Roller or Spray | DT: @ 25°C ±30 minutes RippleTex - TSR: Ripple: Sponge Roller: 2,5m² per litre. SemiTextured: SheepSkin Roller: 4 - 4,5m² per litre | NC: 1 – 2 Coats depending on desired finish | AM: Sponge or Sheepskin Roller | DT: @ 25°C ±30 minutes
Exterior Walls - New Scratch Plaster
If New Scratch Plaster Surface Preparation Brush plaster to remove loose friable particles. Damp proofing new plaster below D.P.C as per Tutorial 6 (New Plaster). Application Method Apply 1 liberal coat SealerMix directly to exposed plaster not treated for rising damp with a brush, roller or airless spray. Allow to dry. Apply 1 coat AcrylUnder with a brush, roller or airless spray to plaster not treated for rising damp. Allow to dry. Apply top coat of your choice to all the plaster. Related Paintcor Products TSR = Theoretical Spread Rate | NC = Number of Coats | DT = Drying Time Undercoat / Preparation SealerMix - TSR: 8m² per litre | NC: 1 liberal Coat | AM: Brush, Roller or Spray | DT: @ 25°C – 20 minutes. Allow 45 minutes before overcoat AcrylUnder - TSR: 5 - 6m² per litre | NC: 1 Coat | AM: Brush, Roller or Spray | DT: @ 25°C – 30 minutes Top Coat Choices EleganceMatt - TSR: 8 - 10m² per litre | NC: 2 Coats minimum | AM: Brush, Roller or Spray | DT: @ 25°C ±25 minutes EleganceSilk - TSR: 8 - 10m² per litre | NC: 2 Coats minimum | AM: Brush, Roller or Spray | DT: @ 25°C ±25 minutes Luxuriance - TSR: 8 - 9m² per litre | NC: 2 Coats | AM: Brush, Roller or Spray | DT: @ 25°C ±30 minutes Pristina - TSR: New Plaster: 4 - 5m² per litre. Painted Smooth Plaster: 7 - 8m² per litre | NC: 2 Coats | AM: Brush, Roller or Spray | DT: @ 25°C ±30 minutes
Exterior Walls - One-Coat Cement Plaster (Wood Floated) with Texture Differences
If One-Coat Cement Plaster (Wood Floated) with Texture Differences Surface Preparation Brush plaster to remove loose friable particles. Application Method Apply 1 coat Acryseal diluted 1:1 with water. Allow to dry. Apply 1 coat SubTex with a sponge roller (for a low relief ripple finnish)or with sheepskin roller(for a textured finnish) allow to dry. A second coat of SubTex may be applied if scarring is bad. Apply top coats of your choice. Related Paintcor Products TSR = Theoretical Spread Rate | NC = Number of Coats | DT = Drying Time Undercoat / Preparation SubTex - TSR: Ripple Roller: 3m² per litre. Sheep Skin Roller: 4.5 – 5m² per litre | NC: 1 Coat. 2 Coats if necessary | AM: Brush or Roller | DT: @ 25°C – 1 hour Top Coat Choices EleganceMatt - TSR: 8 - 10m² per litre | NC: 2 Coats minimum | AM: Brush, Roller or Spray | DT: @ 25°C ±25 minutes EleganceSilk - TSR: 8 - 10m² per litre | NC: 2 Coats minimum | AM: Brush, Roller or Spray | DT: @ 25°C ±25 minutes EnduraCoat - TSR: 9m² per litre | NC: 1 Coat | AM: Brush, Roller or Spray | DT: @ 25°C - 3 hours to Touch Dry
Exterior Walls - Previously Painted
If Exterior Walls have been previously painted. Surface Preparation Remove all loose peeling paint if any. Where paint has been removed, feather the edges of remaining paint to zero with sand paper. Remove sanding dust. Wash wall down to remove all dirt ,dust and any old chalking paint. Allow to dry. Open and clean cracks. See crack and skimming tutorial. Application Method Prime exposed plaster and cracks with 1 coat Acryseal diluted 1:1 with water. If the old paint system was chalking and the chalk has been washed off then prime all surfaces to be painted with Acryseal. Allow to dry. Repair cracks with Flashpatch (see crack and skimming tutorial). Allow to dry Apply 1 coat AcrylUnder to all primed exposed cement plaster and repaired cracks. Allow to dry. Apply 1 or 2 top coats of your choice. Allow to dry between coats. Two coats are necessary for long term protection Related Paintcor Products TSR = Theoretical Spread Rate | NC = Number of Coats | DT = Drying Time Undercoat / Preparation AcrySeal - TSR: 10 - 15m² per litre | NC: 1 Coat | AM: Brush, Roller or Spray | DT: @ 25°C – 30 minutes AcrylUnder - TSR: 5 - 6m² per litre | NC: 1 Coat | AM: Brush, Roller or Spray | DT: @ 25°C – 30 minutes FlashPatch - TSR: N/A | NC: N/A | AM: Trowel or Scraper | DT: @ 25°C – 1 hour Top Coat Choices EleganceMatt - TSR: 8 - 10m² per litre | NC: 2 Coats minimum | AM: Brush, Roller or Spray | DT: @ 25°C ±25 minutes EleganceSilk - TSR: 8 - 10m² per litre | NC: 2 Coats minimum | AM: Brush, Roller or Spray | DT: @ 25°C ±25 minutes EnviroCoat - TSR: 10m² per litre | NC: 1 or 2 Coats | AM: Brush, Roller or Spray | DT: @ 25°C ±30 minutes Luxuriance - TSR: 8 - 9m² per litre | NC: 2 Coats | AM: Brush, Roller or Spray | DT: @ 25°C ±30 minutes Pristina - TSR: New Plaster: 4 - 5m² per litre. Painted Smooth Plaster: 7 - 8m² per litre | NC: 2 Coats | AM: Brush, Roller or Spray | DT: @ 25°C ±30 minutes RippleTex - TSR: Ripple: Sponge Roller: 2,5m² per litre. SemiTextured: SheepSkin Roller: 4 - 4,5m² per litre | NC: 1 – 2 Coats depending on desired finish | AM: Sponge or Sheepskin Roller | DT: @ 25°C ±30 minutes
Exterior Walls - Smooth Plaster previously painted in Enamel
If Smooth Plaster previously painted in Enamel. Surface Preparation Where paint has been removed, feather the edges of remaining paint to zero with sand paper. Remove sanding dust. Wash wall down to remove all dirt ,dust and any other contaminants. Allow to dry. Sand existing enamel to a smooth matt finish. Remove sanding dust. Application Method If peeling paint has been removed exposing cement plaster then prime exposed cement plaster with 1 coat AcrySeal diluted 1:1 with water. Allow to dry. If finishing in Enamel then undercoat all areas where paint has been removed and primed with UniSub Allow to dry, then apply enamel of your choice. If finishing in acrylic, first apply 1 coat of AcrylUnder to all the exposed sealed plaster only. Allow to dry. Apply 2 coats of top coat of your choice. Related Paintcor Products TSR = Theoretical Spread Rate | NC = Number of Coats | DT = Drying Time Undercoat / Preparation AcrySeal - TSR: 10 - 15m² per litre | NC: 1 Coat | AM: Brush, Roller or Spray | DT: @ 25°C – 30 minutes AcrylUnder - TSR: 5 - 6m² per litre | NC: 1 Coat | AM: Brush, Roller or Spray | DT: @ 25°C – 30 minutes UniSub - TSR: 8m² per litre | NC: 1 Coat. New Doors 2 Coats | AM: Brush, Roller or Spray | DT: @ 25°C – 1 hour Surface Dry. @ 25°C – 5 hours Hard Dry Top Coat Choices EleganceMatt - TSR: 8 - 10m² per litre | NC: 2 Coats minimum | AM: Brush, Roller or Spray | DT: @ 25°C ±25 minutes EleganceSilk - TSR: 8 - 10m² per litre | NC: 2 Coats minimum | AM: Brush, Roller or Spray | DT: @ 25°C ±25 minutes Essensual - TSR: 8 - 10m² per litre | NC: 1 or 2 Coats | AM: Brush, Roller or Spray | DT: @ 25°C ±25 minutes EnviroCoat - TSR: 10m² per litre | NC: 1 or 2 Coats | AM: Brush, Roller or Spray | DT: @ 25°C ±30 minutes Luxuriance - TSR: 8 - 9m² per litre | NC: 2 Coats | AM: Brush, Roller or Spray | DT: @ 25°C ±30 minutes Pristina - TSR: New Plaster: 4 - 5m² per litre. Painted Smooth Plaster: 7 - 8m² per litre | NC: 2 Coats | AM: Brush, Roller or Spray | DT: @ 25°C ±30 minutes EnduraCoat - TSR: 9m² per litre | NC: 1 Coat | AM: Brush, Roller or Spray | DT: @ 25°C - 3 hours to Touch Dry HiGlo - TSR: 10m² per litre | NC: 1 – 2 Coats | AM: Brush, Roller or Spray | DT: @ 25°C – 2 hours Surface Dry. @ 25°C – 7 hours Hard Dry LoGlo - TSR: 10m² per litre | NC: 1 – 2 Coats | AM: Brush, Roller or Spray | DT: @ 25°C– 2 hours Surface Dry. @ 25°C – 7 hours Hard Dry
Exterior Walls Tutorial - PDF Document
Entire Tutorial covering all Surface Preparation and Application Methods and Related Paintcor Products for Exterior Walls - Painting Exterior Walls - PDF - (4M)
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