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 MyMason's Case Studies

 Fireplace Case Studies

    Nakkertok Fireplace Surrounds

    Fireplace Surround - Old Wood to New Wood Insert

    Fireplace Surround - Old Wood to New Wood Insert

    Fireplace Fire Brick Replacement

    Fireplace Surround - Natural Stone

    Electric, Natural Stone Fireplace

    Fireplace Hearth Replacement

    Stone Fireplace

    Cultured Stone Fireplace & New Framing

    Cultured Stone Fireplace Surround

    TV Mounted on Stone Fireplace

    Restructuring Fireplace: Wood to Gas

    Drywall to Stone Fireplace

    3-sided fireplace: Cultured Stone

    Fireplace Removal, Damper Removal

 
 Chimneys and Brickwork Case Studies

    Chimney Repair

    Chimney Repair, Articulated Boom

    Custom Scaffold, Chimney Repair

    Lower-Chimney's Removal, Wall Restructuring

    Chimney Flue Replacement

    Concrete Chimney Cap as per Building Code

    Chimney - Sloped Side, Repair

    Chimney - Wobbly Chimney

    Brick Pillar

    Brick Garage Pillar Repair

    Window's Lintel Installation

    Brick Sill Creates Wall Damage

    Brick-to-Stone Window Sill Replacement

    Brick Retaining Wall Rebuild

 
 Stone Work Case Studies

    Stone Wall Rebuild

    Granite Resurfacing of Concrete Stairs

    Stone Step Rebuild

    Stone Stair Rebuild - in Winter

    Stone replaces Brick Door Sill

    Stone Retaining Wall Rebuild

    Dry-Stack Retaining Wall Rebuild

    Dry-Stack Stone Retaining Wall

    Flagstone Patio Rebuild, Expansion

    FlagStone Step Repair

    Stone Replacement

    New Interlocking Stone Walkway

    Re-setting Interlocking Walkway

    Tile Installation

 
 Algonquin College/MyMason Case Studies

    Cold Weather Masonry Rules

    3 New Cases Studies in 2015

    Salt and Concrete Testing

    Concrete Curing Stress Tests

    Concrete and Rebar Stress Tests

 
 Parging Case Studies

    Parging, Cement Board

    Parging Examples & Techniques

 
 Concrete Case Studies

    Broken Concrete Step

    Basement Window, Concrete Cut

    Basement Window, Concrete cut-out

    Concrete Walkway, Landing

    Concrete Stairs and Landing

    Concrete Stairs and Landing

    Concrete Countertop

 

 

 

    Case Study: Stone Stair Replacement

 
        Before and After

   

 
    Stone Stair Replacement:
        Assignment: Rebuild the stair during the winter.

 
Cracked, heaved, curved.
The slight curve resulted from the earth heaving inside the stair.
The inside of the step is just loose filler, which freezes and expands.
The repeated expansion and contraction of the filler breaks the step's cement joints.

 
Inside the stone step
The loose fill absorbs water, freezes, expands.

 
Empty cavity in step
With much of the fill removed, the source of the problem is clearer.

Base of post is rotting
Exposed to the earth, and cement, the wooden support post absorbs water and rots.
Ideally, the post is not surrounded by concrete and earth, not below grade.
Earlier repairs
The stair is completely removed.

Someone else had installed a layer of stone to adjust the walkway height.
Perhaps the original stone were sinking.

The two steps are now 18" high, more than the allowed 15.5".
Someone might trip.

Dry-fit
Stones removed, set in order and photographed.
Some replacement stones may be needed due to horizontal cleaving.

Off site in a warm basement the stair's stone will be cast in concrete.
With rebar reinforcement, this will be a heavy and solid replacement.

Temporary Stair
This solid concrete block stair is temporary.
The stair measures 14" deep, 16" wide, and 7" high.
The slabs have been glued together, in plus 4 degree weather.

Arrival, weighing hundreds of pounds
Carried in my pick-up, from being cured in a warmed garage.

The tailgate is off, a ramp is being used.
Plywood protects the existing walkway.

Straps help move it.

Without the top
Here you can see the step is solid concrete, no loose fill.

Done
Here the stone stair is rebuilt, and cemented in place.

The top step had ten small pieces and one large one, now just three large ones.


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This page last modified: February 6 2012