PHI-2024 Division 04 Masonry- Brick MasonryHistoric New England Specifications
Exterior Preservation Project
Phillips House- Carriage Barn, Salem, MA
SECTION 04 21 13 – BRICK MASONRY Page 1 of 4
DIVISION 04
MASONRY
SECTION 04 21 13 – BRICK MASONRY
SECTION I – GENERAL
1.1 RELATED DOCUMENTS
A. Division 00 Procurement and Contracting Requirements
B. Division 01 General Requirements
C. Project Drawings and Photos
1.2 DESCRIPTION OF WORK
A. The extent of masonry work includes, but is not limited to, the following on the four
elevations and one chimney of the structure (see Project Price Proposal for quantity
details):
a. North, east, south, and west elevations: Spot repoint and spot replace bricks.
b. Chimney: Spot repoint and investigate and recaulk cap.
B. If subcontractor is used, they must meet bid pre-qualification requirements.
1.3 PRODUCT STORAGE
A. Store mortar and masonry materials off the ground on skids or pallets.
a. Place materials on skids/ pallets in such a manner as to prevent any damage
and/or breakage.
b. Distribute weight of materials on skids/ pallets evenly as best as possible.
c. Cover with non-staining, waterproof membrane.
i. Allow air to circulate around stored materials.
B. Place and stack skids/ pallets in a safe manner.
1.4 ENVIROMENTAL CONDITIONS
A. Do not undertake masonry projects when the temperature is 40°F or below unless
acceptable protective measures are implemented.
a. Protect work area during work and partially completed work upon the workday’s
end when temperature of the surrounding air is 40°F and falling.
i. Cover with strong, waterproof, non-staining membrane and hold securely
in place.
b. No types of antifreeze compounds or air entraining agents will be introduced into
the mortar.
B. Do not use frozen materials or materials mixed or coated with ice or frost.
C. Do not build on frozen work.
D. Remove and replace masonry work damaged by frost or freezing.
Historic New England Specifications
Exterior Preservation Project
Phillips House- Carriage Barn, Salem, MA
SECTION 04 21 13 – BRICK MASONRY Page 2 of 4
1.5 SUBMITTALS
A. Samples of mortar mix components.
B. Air-dried mortar samples.
C. Three samples of replacement bricks.
C. Mockup of mortar removal efforts not less than one square foot.
D. Mockup of repointing efforts of not less than one square foot.
SECTION II – PRODUCTS
2.1 BRICKS
A. Match existing.
2.2 MORTAR
A. Type K: 1:3:10-12 (Portland:lime:sand)
1. Portland Cement- Type 1
2. Lime- Hydrated Type S
3. Sand- Fine Aggregate
2.3 WATER
A. Clean and free from deleterious amounts of acids, alkalis, or organic materials.
2.4 CAULK
A. TBD, elastomeric sealant.
SECTION III – EXECUTION
3.1 PREPARATION OF MORTAR
A. Measure and thoroughly mix dry ingredients (i.e. sand, cement, and lime).
a. Measure by volume.
B. Add half amount of water and mix for roughly five (5) minutes.
a. Continue to add the remaining water in small portions until the mortar has
reached the desired consistency for use.
C. Ensure uniformity of visual and physical characteristics.
D. Do not use mortar that has stood more than one (1) hour after its preparation.
a. Do not retemper mortar.
3.2 PREPARATION OF MASONRY
Historic New England Specifications
Exterior Preservation Project
Phillips House- Carriage Barn, Salem, MA
SECTION 04 21 13 – BRICK MASONRY Page 3 of 4
A. Rake out compromised and ill-suited (hard, incompatible) mortar to a depth of at least 2.5
times the width of the joint (minimum ¼”) and remove deteriorated bricks.
a. Hand tools, such as chisels and hammers, are preferred.
b. Handheld mechanical tools, such as pneumatically-powered chisels, can be used
at the discretion of the Project Manager.
i. No power saws or grinders are allowed.
B. Compromised mortar includes the following:
a. Joint has eroded back more than ¼” from the masonry face.
b. Vertical and/ or horizontal cracks run through the mortar.
c. Mortar bonds are broken or have pulled away from the masonry.
d. Mortar has fallen out of joints.
e. Mortar is excessively soft, powdery, or crumbling.
C. Leave a clean, square face at the back of the joints.
D. Carefully clean out prepared joints with a soft or stiff bristle brush, or blow them clean
with low-pressure compressed air (40-60 psi).
E. Thoroughly flush out joints with water.
3.3 POINTING
A. Ensure where mortar is to be placed is clean of all loose particles, dust, and debris.
B. Damp areas where mortar is to be placed.
a. Ensure no standing water is present.
C. Fill joints as needed building up mortar to reach appropriate thickness.
a. Tool mortar into joints in layers no thicker than 1/4”.
b. Apply additional layers only once subsequent layers have become thumbprint
hard.
c. Compact mortar well into crevices filling all voids.
d. When final layer of mortar is thumb print hard, strike joint duplicating the contour
of original sound joints.
i. Aim for a slightly struck joint.
1. No special tooling is required on any joints as they originally did
not have any.
D. Lay replacement bricks matching adjacent bonds.
3.4 MASONRY CLEANING
A. As Work proceeds and after completion of Work, prior to initial set of mortar (1-2 hours),
remove excess mortar, droppings, smears, stains, and other soiling substances resulting
from the Work of this Section with a stiff natural bristle or nylon brush.
B. After mortar is thoroughly set, clean masonry with a stiff natural bristle or nylon brush an
80% solution of acetic acid (vinegar).
a. Rinse thoroughly afterwards with water.
3.5 CHIMNEY CAPS
Historic New England Specifications
Exterior Preservation Project
Phillips House- Carriage Barn, Salem, MA
SECTION 04 21 13 – BRICK MASONRY Page 4 of 4
A. Investigate conditions of chimney cap and inform Project Manager.
B. Recaulk where caps meet masonry.
END OF SECTION