Render repair

Fill render cracks, patch, seal porous render, inject hollows

Property Repair Systems - 01626 331351 - where you can speak to real people.

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Render Crack and Patch Repairs - render repair

Render repair, which can include plaster repair, is carried out due to damage caused by movement (wall cracks, hollow render patches), dampness (salt penetration, efflorescing salts) and weathering (stress cracks, caused by temperature changes.) You can repair walls, deal with render problems and repair plaster using our epoxy repair products. Please call for free technical advice.

Summary - how to Fill Cracks in render: epoxy putty method

1. Grind or chisel out - cut into the cracks to produce square sided slots to the full depth of the render coatings..

2. Clean - remove all dust by brush, vacuum or compressed air.

3. Prime - apply one coat of Epoxy Primer.

4. Fill - whilst the Primer is still tacky apply Mouldable Epoxy Putty. Smooth with a wet knife.

Crack cut out to square shouldered slot ready for filler

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Summary - how to Patch Areas of damaged render: epoxy mortar method

1. Cut out - cut out patches well clear of the damaged or cracked edges with a masonry grinder to form square edged slots.

2. Remove all dust and debris by brush, vacuum or compressed air.

3. Prime - apply one coat of Epoxy Primer.

4. Fill - whilst the Primer is still tacky apply Epoxy Patching Mortar. Smooth with a wet knife.

Blown Render - needs cutting out, priming and patching

'Blown' render patch - needs to be cut out

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Summary - how to Patch Areas of damaged render: cement based method

1. Cut out - cut out patches well clear of the damaged or cracked edges with a masonry grinder to form square edged slots.

2. Remove all dust and debris by brush, vacuum or compressed air.

3. Wet out with fresh water and prime with BondAcryl.

4. Mix up a mortar of 4:1 sharp, washed sand with fresh Portland Cement, using BondAcryl instead of water. Apply the mix to the primed patch area while the primer is still damp and finish flush

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.Render that has blown can be patched

'Blown' render patch - needs to be cut out

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Cracked Render Filling - render repair with Epoxy Primer and Epoxy Mouldable Putty

How to choose a crack repair method and material in brick, stone, render and concrete.

General principle - cut out the cracks with a masonry grinder, or Allsaw, to form square edged slots, and remove all dust and debris

Repair Thickness - the more material that we can put in to the repair, in terms of width and depth, the better it will be able to accommodate natural movements caused by changing temperatures and therefore the better it will last.

Caution - Always consult a Structural Engineer and the building's Insurers before proceeding.


Fine to medium cracks - hairline to 15mm wide.

Cut out to - 15mm to 25mm in width

Apply Epoxy Primer liquid by brush and whilst tacky lay in the putty-like repair mortar, Mouldable Epoxy Putty.

Epoxy Primer - available in 500cc and 1 litre, two pot, liquids.

Mouldable Epoxy Putty - available in 500cc and 1 litre, two pot, putties.

Cut out cracks to a clean slotMixing Mouldable Epoxy Putty Mortar by hand

Slot correctly cut out, square shouldered, dust blown out, ready to Prime and Fill. Mixing.

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For cosmetic matching of colour or texture:

You can add your own Site dust or chippings to the surface, (or ask for our Mortar Colour Powder), which you can mix into Mouldable Epoxy Putty, used as a surfacing finish.

Apply Epoxy Primer liquid by brush and whilst tacky lay in the putty-like repair mortar, Mouldable Epoxy Putty.

Epoxy Primer - available in 500cc and 1 litre, two pot, liquids.

Mouldable Epoxy Putty - available in 500cc and 1 litre, two pot, putties..

Mixing Mouldable Epoxy Putty Moratr

Mixing Mouldable Epoxy Putty in the gloved hand.

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Render Finishing - seal renders with a waterproof coating

Render Coating

To refinish damaged render, or to seal a 'bund' (to retain chemicals, oils etc.) apply two coats.

Cement Based - Hydradry cementitious 'tanking' coating is a waterproof barrier suitable for indoor and outdoor use. The cement based system is easy to apply to damp and rough surfaces, requires two coats brushed out in different directions (to avoid pin holes) and is rapid drying.

Cement based surface coating - waterproof

Waterproofing with cementitious 'tanking'

 

Cementitious Tanking - Hydradry - available in 25kg plastic tubs, powder, just add water

BondAcryl - available in 1.5, 5 and 25 litre plastic containers, add OPC (cement).

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Render Crack Injection - crack stabilisation using injected epoxy resins - injecting hollow patches

Crack Injection

To treat delamination or hollowness, drill a 5mm - 10mm diameter hole into the crack every 100mm to the depth of the separation between layers. (hollow area). Inject Epoxy Primer/Consolidator , a thin liquid, or Thixotropic Injection Resin , a gel type product, until it exudes from the next hole. Test for hollowness with a plastic hammer until the delaminated areas cease to sound hollow.

Syringe Injection of hollow render

Injecting cracks in masonry using a syringe. Syringes - in 10cc, 20cc and 50cc sizes.

Epoxy Primer - available in 500cc and 1 litre, two pot, liquids.

Thixotropic Epoxy Injection Resin - available in 400cc, two pot, gels, with cartridge kit.

Thixotropic Epoxy Resin for Injection - blue and cream colours show when mixedInjecting Thixotropic Injection resin from a 400cc cartridge

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Property Repair Systems,

Unit 3, Olympus Business Park, Kingsteignton Road, Newton Abbot, Devon, TQ12 2SN

T: 01626 331351 F: 01626 331143

E: help@propertyrepairsystems.co.uk


Other Property Repair Systems free advice Sites:

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www.dampness-info.co.uk - how to treat penetrating dampness in walls and plaster

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www.dryrot.biz - how to kill Dry Rot in buildings

www.drywallandfloor.co.uk - membranes for lining damp walls, floors, basements and cellars

www.fire-door-paint.co.uk - upgrade doors to 30 minutes fire resistance

www.fire-info.co.uk - fire fabrics for insulation, flame and smoke barriers

www.joist-repair.co.uk - how to quickly repair joists and beams of any size

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www.propertyrepairsystems.co.uk - fire retardant paints, hygiene products, metal bracket manufacture, crack injection

www.steel-fire-paint.co.uk - treat steel with Intumescent Paint to provide fire protection

www.timber.org.uk - systems of repair, with step by step methods

www.timber-repair.co.uk - how to repair timbers in buildings without wrecking the place

www.woodworm-info.co.uk - how to kill and prevent woodworm and death watch beetle

www.wood-worm.co.uk - how to stop common furniture beetle in buildings

www.woodworm-expert-advice-forum.org.uk - answers to your Woodworm questions