The chimney crown is the top element of every masonry chimney. Unfortunately, the crown, which is supposed to protect the inside of your chimney from water can quickly deteriorate and allow water to wreak havoc on the inside of your chimney.
A simple crown repair again will save you a lot of money down the road. An afternoon job will save you weeks of rebuilding your chimney.
A proper chimney crown should be constructed to provide an overhang to protect the sides of the chimney. This overhang should be a least two inches.
If the concrete is loose and falling apart use the following instructions. But if your crown just has some cracks and is not loose and falling off you can use Crown Saver. This product will save a lot of physical work. It is a flexible sealant that you can apply with a trowel.
Tools Needed For Your Crown Repair Project
Crown Repair Procedures To begin your crown repair you will first want to place a drop cloth on the roof for protection. Using your hammer and chisel, carefully take off the deterriorated crown. Working from the edge in, break apart the concrete and discard in your bucket.
Next, using one bag of masonry cement and 1/2 bag of the pea gravel, create a mixture by slowly adding water to create the proper consistency for your crown mixture. Just before you reach the right thickness (it will be like frosting) add 1 cup of the bonding agent and finish mixing.
Keeping in mind you must carry it up the ladder, shovel the cement into the bucket. Begin by using even amounts and place onto the chimney. Be sure to release any bubbles in the cement by using the edge of the trowel and chopping it. This will make the bond stronger.
If the flue protrudes out of the chimney more than 6 inches, the crown should be formed about 4 inches high where it meets the flue. If it is less than 6 inches, the crown should be built to 2 inches from the top of the flue.
Using your trowel, create a pyramid shape being sure it slopes away from the flue. Place the cement up against the flue and as you work, smooth the mortar.
Once the crown is completely dry a crown sealer should be used. This will allow water to get out but not in.
Purchase a stainless steel chimney cap which will deflect water away from the crown.Chimney-Liner-Central.com Home: The DIY Chimney Repair Resource