Rock and fieldstone chimney repair in Bal Bay

The weep screed at the bottom of the stone

On framed walls, a corrosion-resistant weep screed at the base of the veneer gives water behind the stone a way out. The same maker notes that most building codes require one in framed applications and that the barrier laps over its flange.

A screed that is buried, painted over, mortared shut or missing traps water inside the wall. We check the base of every veneer chimney and describe what we find, since loose stones near the bottom of a chase often trace back to this detail.

Why repointing mortar is softer than the stone

Preservation Brief 2 sets out that new mortar must have greater vapor permeability and be softer, measured in compressive strength, than the masonry units, and be as permeable and as soft or softer than the historic mortar.

The reasoning is practical. Joints are meant to be the part that wears and gets repointed. A mortar harder and tighter than the stone forces moisture and stress into the stone faces instead, and the stone pays for it. We choose the mix with that rule in mind.

What a stone chimney estimate lists

A clear stone estimate separates the work so you can see and approve each part. Ours list the stones to reset or replace, the joints to repoint and how deep, the mortar type and how it will be matched, and any access equipment.

Cap, crown, flashing, drainage and flue items sit on their own lines beside the stone work. Each has its own price, and the total does not change later without your approval.

• Stones to reset or replace
• Joints to repoint and depth
• Mortar type and color match
• Access and site protection
• Related items on their own lines

When veneer needs to come off and go back on

Sometimes veneer has failed across a whole chase, with corroded lath, missing barrier layers or trapped water throughout. Resetting stones one by one would leave the real problem in place.

Then the right repair is to remove the veneer, rebuild the barrier, lath and scratch coat to the maker's directions and reinstall the stone, reusing sound pieces. It is a bigger job, and we show you the evidence for it before recommending it.

Save 10% on stone chimney repair booked within 72 hours

Any service booked within 72 hours after your free inspection is 10% off, and stone chimney repair counts. Mention the offer when you book, and it appears on your written estimate before you approve anything.

The discount applies to the service you book, including resetting, repointing and stone replacement when they are part of that job. It is a simple offer from a local business, honored the same way every time.