Repair Parapet Walls

Fill parapet cracks, joints, holes, re-surface

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

 

 
     

Crack Filling - Parapet repair with Epoxy Primer and Epoxy Mouldable Putty

Parapet Crack Repairs - 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 in parapets - hairline to 15mm wide.

Cut out to - 5mm 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.

Parapet crack in need of cutting outCut out cracks to a clean slot

Cracks need to be correctly cut out, square shouldered, dust blown out, ready to Prime and Fill

Mixing Mouldable Epoxy Putty Mortar by handMouldable Epoxy Putty mixed by hand - ready to repair cracksEpoxy Putty coloured using Mortar Powder

Mixing Mouldable Epoxy Putty in the gloved hand. Ideal for small repairs. It can be coloured to match masonry using our Mortar Powder.

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Larger holes and cracks in parapets - over 15mm wide

Cut out to - 20mm plus in width - can fill holes of any size.

Pour or inject Structural Epoxy Pouring Resin.

Structural Pouring Resin - available in 2.5 litre and 7.5 litre packs, containing two liquids and a powder.

Pouring Structural Epoxy Resin - paddle mix with an electric drill

Pouring Structural Pouring Resin - 7.5 litre.

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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, to be 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 MoratrMouldable Epoxy Putty coloured black using our Mortar powder

Mixing Mouldable Epoxy Putty in the gloved hand. Coloured ball of mixed putty to match masonry.

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Joint Filling - parapet joint repair with primer and cementitious filler

Parapet Joint Filling

Cut out the joint with a masonry grinder or disc cutter, to form a square edged slot and remove all dust and debris. Wet out the slot with fresh water and prime with BondAcryl.

Cut out to - 20mm plus in width - can fill a slot of any size.

Insert a waterproof pointing mix of either Fillet Seal (supplied as a powder) or Bondacryl mixed with sand and cement (no water).

Fillet Seal Powder - available in 25kg packs, or use Bondacryl with your own washed sand and cement - supplied in 2.5, 5.0 and 25 litre bottles.

 

Concrete floor meets brick wall - open damp jointQuarry tile floor meets brick wall - needs 'tanking' below the damp proof course

Typical parapet joint problems - cut out the roof edge and fill. May require 'tanking' as well.

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 slot and finish flush.

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

Parapet 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 or Thixotropic Injection Resin until it comes out of the next hole. Test for hollowness with a plastic hammer until the delaminated areas cease to sound hollow.

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

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

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

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Parapet reinforcement - reinforcement with stainless rods and cementitious mortar

Reinforcing

Rusting reinforcement requires treatment, after full exposure. Give us a call for the cost of special rust proofing treatment.

Cut out the cracks with a masonry grinder to form square edged slots and remove all dust and debris. Wet out the slot with fresh water and inject the shrink compensated repair mortar, W60, using the Grout Master plastic applicator. Insert a length of stainless steel helical reinforcement bar, as per our Data Sheet (available free, on request). Apply further W60 Grout to fill the crack. Finish using the Finger Trowel. Always consult a Structural Engineer and the building's Insurers before proceeding.

Stepped crack in a parapet wall, caused by movement lower down.

Stepped crack in a Parapet Wall - will require Stitching.

 

Helical Bar fo reinforcing concrete repairs

Stainless Helical Bar

 

Supplied complete as a APRs Crack Filling Kit - Grout Master Applicator, Finger Pointing Trowel, W60 Grout, Mixing Paddle, or the materials and tools can be purchased individually.

Concrete repair kitCutting and filling steps for walls and floors

 

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Rebedding and bonding Parapet Coping Stones

Epoxy Bonding for Parapet Copings

Remove the Parapet Copings and re-bed them in Epoxy Patching Mortar.

Parapet coping stone that needs re-beddingEpoxy Patching Mortar Kit, for re-fixing Parapet Copings

For smaller, smooth copings Epoxy Adhesive Paste can be used instead..

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Waterproofing parapet walls

Cement based Tanking for Parapet walls

Clean off all debris and make good all joints and cracks using W60 Flexible Crack Grout. Damp the faces with fresh water.

Apply two coats of Hydradry Tanking Slurry. This can take a Masonry Paint finish, if a non cement colour is required.

Hydradry Slurry Coat 1, bushed in one direction.Slurry coat 2 brushed at 90 degrees, to avoid missing pinholes.

Slurry coats 1 and 2 brushed at 90 degrees to each other onto the damp wall.

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Property Repair Systems

T: 01626 331351

F: 01626 331143

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

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