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 Moldable Epoxy Putty. Smooth with a wet knife.
Clicking on a blue Product Name takes you directly to the Shopping Page,
or Click here to go to our Shopping Pages
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 patch - needs to be cut out
Clicking on a blue Product Name takes you directly to the Shopping Page,
or Click here to go to our Shopping Pages
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
Clicking on a blue Product Name takes you directly to the Shopping Page,
or Click here to go to our Shopping Pages
.
'Blown' render patch - needs to be cut out
Click here to go to our Shopping Pages
Cracked Render Filling - render repair with Epoxy Primer and Epoxy Moldable 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, Moldable Epoxy Putty.
Epoxy Primer - available in 500cc and 1 litre, two pot, liquids.
Moldable Epoxy Putty - available in 500cc and 1 litre, two pot, putties.
Slot correctly cut out, square shouldered, dust blown out, ready to Prime and Fill. Mixing.
Click here to go to our Shopping Pages
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 Moldable Epoxy Putty, used as a surfacing finish.
Apply Epoxy Primer liquid by brush and whilst tacky lay in the putty-like repair mortar, Moldable Epoxy Putty.
Epoxy Primer - available in 500cc and 1 litre, two pot, liquids.
Moldable Epoxy Putty - available in 500cc and 1 litre, two pot, putties..
Mixing Moldable Epoxy Putty in the gloved hand.
Click here to go to our Shopping Pages
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.
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).
Click here to go to our Shopping Pages
Render Crack Injection - crack stabilisation using injected epoxy resins - injecting hollow patches
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.
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.
Click here to go to our Shopping Pages
OUR SHOPPING PAGES
- RESINS SHOP - this Site, for Epoxies and other building repair resins
- TANKING SHOP
- SURVEYING TOOLS SHOP
- MEMBRANE FOR DAMP WALLS & FLOORS SHOP
- FIRE PAINTS SHOP
- RUST CONTROL SHOP
Contact I History I Links I Privacy Policy | Returns Policy I Resins Shop | Technical | References
Property Repair Systems
T: 01626 872886
E: Mail us help@propertyrepairsystems.co.uk
Site written by: David Moore
David Moore, B.A. (Hons.), C.T.I.S., C.R.D.S. Technical Author
Google+
Other Property Repair Systems Sites:
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.joist-repair.co.uk - how to quickly repair joists and beams of any size
www.propertyrepairsystems.co.uk - our Home Site
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 timber beams