Top Tips for Rendering

Weber UK

We asked our applications and training team for their top tips when rendering.  These are tips which you might not find in a technical data sheet or have been taught at college, these little pearls of wisdom have come from decades of onsite experience which will hopefully help you to achieve the perfect finish every time.

Read recommendations from the guys that use our render products every day.  If you have your own top tips to add, please feel free to share them with us!

Stuart Owen - Product Demonstrator – Technical Academy

"When scraping down monocouche render wear tinted safety glasses just before finishing to help you spot miss marks as they seem to stand out better with the tinted glasses on.

Also always make sure you check for miss marks before and after brushing it down with a clean soft brush, then once all miss marks have been scraped always remember to brush it down again!"    

Chris Meek – Applications Manager - Scotland and North East

"When dashing if using a bagged chip some can come with excess water content in the bag (some more than others), pierce these bags to drain excess water as dashing with this material can cause lime bloom patches and even slumping.

If dashing from a scaffold the excess chips are usually caught at the bottom in casting trays or sheets which is normal practice.  Some that fall from a height can bounce on the scaffold hops ups and boards then striking the wall creating a line within the overall cast, lay dust sheets or soft material on hop ups / boards to stop the bounce and to stop these marks within the cast.

Plaster mixing baths make excellent chip catchers."

Phill Powell – Applications Manager – South Wales and South West

"Always keep a brand new sharp scratcher in the van just in case you get caught out with an overnight scrape. This will help break the surface of the render.

Keep a thermometer in the van and document the temperature on the job sheet, especially in the warmer months"

Rob Speke – Technical Academy Manager

"Never eat yellow snow"

Lin Twidale – Academy Trainer – Technical Academy

"If using a machine always wet the pipe prior to filling with product as it lubricates the pipe and avoids separation of material.

Preparation is key for rendering, strength, suction and key are all essential."

Dave Hunt – Applications Manager – South London & South East

"When dashing I always place a layer of Weber Standard mesh under the catch trays (usually about a metre long), this also works well in awkward places where trays cannot be used, keeps the waste down.

Also when dashing , use a good quality bucket as a cheap one won't last 2 minutes, once you have your buckets drill a fair few holes in the bottom (6-8mm) , this will release any access water that may be lying in the bottom when they are filled with stones." 

Kevin Grainger – Applications Manager – Northern England

"Never throw away the bags the material comes in, they can be re used for putting waste materials or rubbish in."

Jimmy Wood - Applications Manager - North Wales & Midlands

"Always try and work with the sun in your face and not on the working background to avoid the substrate getting too hot.

When applying weberpral monocouche render keep all material proud of beads to ensure enough render is there when scraping back."

Marc Jackson - Technical Services Team Leader

"When applying weberplast TF or webersil TF, always ensure a wet edge is maintained to avoid dry lines in the finish.

In warmer conditions, have someone follow behind to finish the TF as one puts it on, or if you are on your own do approx. 1-2m² at a time.

Avoid trying to do large sections before finishing with the flat float."

Mike Atthis - Applications Manager - North London & East Anglia

"Always spat/trowel horizontally along where there is going to be a join like at scaffolding height. This will help to eliminate a scarring joint/flat spots. If you spat vertical you might round the wet edge off."

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