lets start with explaining how brick and mortar works , unlike concrete where the aggregate give the concrete strength, bricks are made to have pressure and/or weight on them , this is why porches and chimneys are the usual spots that failure first on any home even when the house stays tight and strong, porches and chimneys do not have the same weight on them therefore over time a separation from brick and mortar starts with a hairline crack usually unseen without a close up inspection , then inside that hairline crack water gets in and in the winter freezes expanding that crack each winter until complete failure
Bricks like most things in life needs upkeep and monitoring , especially porches and chimneys , as indicated they are the weakest and most exposed area of you homes brick line , so it’s very common for porches to break apart at the Mortar joints ,even one tiny crack in the mortar can cause major damage after time , Each spot for 💦 water getting through increases the chance for failure Starting with a 0.10 of a inch crack. this is especially bad in the winter time as water freezes ,it expands the crack by 10% each time increasing the gap , after allowing water in , it works its way behind the wall (i.e. Bricks ) putting pressure on the back causing it to get pushed out and off the foundation in which it was placed on.
Just as important is the cap and wash collar on your chimney as well as the pitch of the porch slab ( away from the house ) ,its vital to repair or change cracked or damaged porch cap and/or chimney collars ,in our experience cement patching on porch slabs does not work as new concrete will nit bond to old concrete and if attempted will only last until winter very much like the patches they put in the potholes on the road and we all know how well that works , When you have a foundation built or poured, by law it must be vibrated during the pour to avoid seams from two sections curing at different speeds , this means any foundation must be poured all at once and can not have any separation in this same manner is why patching does not work , there for as a general rule wet cement does not stick to dry cement , in fact there are laws for distances for which cement can be raked or poured so as not to break down the molecules in witch the cements is poured so as to not lose strength and its durability rating of 2500 to 3500 lb per square inch
for every one that is wondering how to evaluate in what condition your bricks are in here a couple of self inspection if you find a hairline crack then your right on time to call a qualified mortar specialist to come and repair these areas before it gets any worse , if you see any bricks that are shifted outward or off center of the one below and so on , that brick or course needs to be removed cleaned and reset back to a straight line fashion , in addition if the mortar joints are swollen wider then the rest of the width of the used to install your bricks same rule applies for repairing
We have mortar technicians qualified to determine if and what requirements are needed to close all gapes call today (313)208-8781