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CSI Specifications
SECTION 06250
Wood Repairs |
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| PART 1. GENERAL |
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1.1 RELATED DOCUMENTS
Drawings and general provisions of the contract, including General
and Supplementary
Conditions and Division 1 Specifications, apply to this section.
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1.2 WORK INCLUDED
Provide labor, materials and equipment necessary to complete the
work of this Section
including, but not limited to the following: |
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1. Removal of exterior finish systems at areas of wood restoration
or repair
2. Preservation and sealing of seams and joints
3. Removal of decayed and contaminated wood
4. Installation of borate wood preservatives
5. Installation of wood repair compound materials
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Extent of wood restoration work is as indicated on the drawings and
as specified herein.
Related Sections: The following sections contain requirements that
relate to this section.
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1.3 SUBMITTALS
General Submit the following according to Conditions of Contract and
Division I
Specification Sections
Product data, installation instructions, and general recommendations
from manufacturer
for types of repair required including technical data sheets
defining performance
properties.
Restoration Schedule: Submit schedule for each window, door,
cornice, or area of wood
trim to be restored, outlining in detail proposed restoration work
to be performed on each
component. Obtain written approval from Architect prior to
commencement of repair
work.
Certification that materials comply with local VOC limitations.
Qualification data for firms and persons specified in the” Quality
Assurance” article to
demonstrate their capabilities and experience. Include a list of
completed projects with
project name, address, names of Architects and Owners, and
information specified.
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1. Five (5) business days after bid opening, submit a written
qualification and
experience of all lead personnel for work on the Project. List
project manager
or foreman’s name and experience relative to this Project.
2. All work shall be performed by persons whose qualifications have
been
submitted and approved.
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1.4 QUALITY ASSURANCE
A. Restorations Specialist: Work must be performed by a firm having
not less than (5)
years successful experience in comparable wood restoration work
including work on
at least three (3) buildings listed in the National Register of
Historic Places under the
direction of federal and state preservation agencies in the last
five (5) years and
employing personnel skilled in the restoration process and
operations indicated.
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1.Restoration Specialist firm must be acceptable to, or certified by,
manufactured of primary restoration materials.
2.Work associated with work of this section, including (but limited
to) paint
removal and substrate preparation, is to be performed by Installer
of the work.
3.Only skilled workers who are thoroughly trained and experienced in
wood
repairs and restoration work at areas as noted, have the skills
required for the
work of this section, and are completely familiar with the materials
and
methods specified shall be used for wood restoration work.
4.At least one skilled worker shall be present at all times during the
execution of
the work and shall personally direct the wood repairs and
restoration work.
5.In acceptance or rejection of the wood restoration work, no
allowance will be
made for lack of skill on the part of the workers.
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B. Field Mock-ups
1. Wood Restoration: following the requirements of the Section,
perform a mock-up of
each type of wood repair system specified to demonstrate materials
and methods
intended to be used in the finished work.
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a) perform mock-ups in areas indicated by the Architect.
b) obtain the Architect’s written approval of each mock-up before
proceeding
with the work of the Section
c) protect the approved mock-ups until the completion of all the
work
d) Approved mock-up shall represent the minimum acceptable standard
for each
type and detail of the restoration work.
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C. Manufacturer: Obtain primary repair materials from a single
manufacturer. Provide
secondary materials as recommended by the manufacturer of the
primary materials.
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1.5 DELIVERY STORAGE AND HANDLING
A. Deliver all materials in original unopened containers labeled
with the manufacturer’s
name, brand name, item name and installation instructions.
B. Store materials in compliance with the manufacturer’s
requirements for temperature,
maximum and minimum, and other conditions. Keep all materials under
cover and
dry. Protect against exposure to the weather.
C. Discard and remove from the job site any materials damaged in
handling or storage
and any materials that have been subjected to conditions contrary to
the
manufacturer’s recommendations or whose maximum shelf life has
expired.
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1.6 PROJECT CONDITIONS
A. Lead: Existing paint may contain lead. Take all necessary
precautions to ensure the
safety of all persons engaged in removing lead-based paint and
dispose of all residues
generated from lead-based paint stripping in a legal manner in
accordance with all
local, state and federal codes.
B. Coordination: Coordinate wood repair with paint stripping so that
the effected
surfaces are exposed for a minimal time to avoid further damage to
bare wood.
Coordinate with painting so that all restored surfaces are primed as
soon as possible
after repair.
C.
Weather: Proceed with the work of this section only when existing
and foreseen
weather conditions permit the work to be performed in accordance
with the
manufacturer’s recommendations for temperature and humidity range,
minimum and
maximum.
D.
Substrate Conditions: Do not proceed with product applications until
substrates have
been inspected and are determined to be in satisfactory conditions.
Substrate
moisture content shall not be in excess of 18°/0 during preparation
and application
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1. Remove all decayed wood to a clean, sound, unaffected substrate
2. Remove all built up paints, and other debris to a clean sound
substrate.
3. Remove all wood sawdust to a clean sound substrate.
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F.
Protection: |
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1.Use all necessary means to protect interior of building from all
damage caused
by precipitation and other environmental conditions during the work
of the
Section
2.Protect all adjacent building surfaces from damage, staining or
deterioration
resulting from wood restoration work.
3.Protect the restoration work in progress to prevent further
deterioration exposed wood surfaces. Protect the completed work
until the time of final inspection and acceptance by the architect.
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G.
Safety: General Contractor shall use all means necessary to ensure
that no person
(whether involved in the work of the Section or not) is harmed or
injured due to the
work of this Section. Comply with all applicable laws codes and
regulations.
H.
Security: Coordinate work with the owners project manager to ensure
that the
building is secured at the end of each work period. Review security
procedures with
the Owner prior to proceeding with the work in this Section.
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| PART 2- PRODUCTS |
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2.1 GENERAL
Compatibility: provide products recommended by the manufacturers to
be fully
compatible with indicated substrate.
2.2 EPOXY REPAIR PRODUCTS
Epoxy repair materials shall consist of 2 separate systems, a 2 part
low viscosity epoxy
primer/coupling agent and a 2 part thixotropic paste meeting the
criteria of Table A and
B.
2.2 MANUFACTURER OF REPAIR PRODUCTS AND EQUIPMENT
Manufacturer: Subject to compliance with the requirements, provide
product of the
following or approved equal.
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1. Advanced Repair Technology
Cherry Valley, NY
2. Window Care Systems
Pembroke, MA
3. or approved equal
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2.3 REPAIR PRODUCTS
1. Low viscosity epoxy coupling/bonding agent
2. Epoxy repair compound
3. Injectable Borate gel
4. Borate rods
2.4 PAINT STRIPPERS
A. Chemical Stripping Agent. Methylene chloride based, Thixotropic
stripper
B. Products: Subject to compliance with requirements, provide the
following, or
approved equal
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1. 509 Stripper
2. ProSoCo
3. or approved equal
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C. Low Temperature heat gun or heat plate, no open flame.
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| PART 3- EXECUTION |
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3.1 INSPECTION
A. Inspect all wood surfaces in conjunction with the Architect to
determine the extent of
restoration and methods to be used.
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1. The Architect’s decision regarding the extent of required repair,
and extent of
profile replication work shall be final.
2. In wood surfaces where decay is present, determine the methods
and treatment
of repair.
3. Areas that do not attach existing profiles, determine the level
of restoration
and replication to be achieved.
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B. Joints, Joinery and edges: Check wood members at joints, seams
and edges for:
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1. Any open seams or failed conditions.
2. Wood moisture content.
3. The presence of wood decay, by probing surfaces.
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C. Sills and Trim
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1. Inspect wood surfaces for natural defects (knots) cracks and
checks.
2. Determine wood moisture content.
3. Probe for the presence for wood decay.
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3.2 REMOVAL
A. Removal of Finishes:
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1. Remove all peeling and loose paint by scraping. Taking care not
to damage
sound wood and profiles.
2. Strip all painted wood surface to bare wood, taking care not to
damage sound
wood and profiles by the application of stripping paste or by the
use of a heat gun
or plate
a) Remove stripper and finishes as directed by manufacturer.
b) Dispose of debris in accordance with approved methods.
3. Wash all surfaces with recommended neutralizing agents to remove
any
foreign particle, dust and chemical residue, allow surface to
thoroughly dry.
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3.3 Preventative Systems
A. Preservation and Sealing of seams and joints. Repair of wood”
checking” due to
weathering.
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1. Open or failed seams and checks shall be dilated to a width of
3/16” and
depth of 1/2”
2. Remove all decayed, soft and weathered wood.
3. Check the moisture content and hardness of wood at and around the
repair,
maximum allowable moisture content 18°/0.
4. Sand bare wood to remove all loose fibers, paint, compounds.
Remove all
sawdust and dirt.
5. Pre-treat bare and sanded wood thoroughly with low viscosity
epoxy
coupling/bonding agent
6. Allow coupling agent to penetrate wood surface for a minimum of
10 minutes
and maximum of 30 minutes, or as recommended by the manufacturer.
Avoid
applying in direct sunlight
7. Remove any excess bonding agent with absorbing paper
8. Apply epoxy repair compound over epoxy bonding agent while still
tacky.
9. Epoxy compound shall have optimal contact with wood
10. Avoid inclusion of air pockets during application
11. Fill joints fill, even and smooth in one application
12. Allow full cure time as specified by manufacturer before
application of paint
or varnish.
13. After curing, sand surface even and smooth. Transitions and
irregularities
between wood and epoxy shall not be visible after sanding
14. If required, smooth any remaining irregularities with an
additional application
of epoxy repair compound. Always sand between coats.
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3.4 CURATIVE SYSTEMS
A. Preservation and Repair of Damaged/Decayed Wood:
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1. Remove all paint and other coatings from area to be repaired.
2. Remove all decayed soft and discolored wood, to sound bright
unaffected
material
3. Check area of removal to determine complete elimination of
decayed material.
a) Remaining wood should be even color without red-brown and/or grayspots.
b) No soft wood, existing brittle compound, or other previous repair
materials should remain.
4. Check moisture content and hardness of the wood in and around the
repair
area
a) Moisture content of wood to be 18°/0 or less
5. Sand bare wood to remove all loose fibers, paint, compounds.
Remove all
sawdust and dirt.
6. Drill holes in effected area to receive borate gel and rods.
Follow
manufacturer’s dose recommendations for dimensional lumber.
7. Inject recommended dose of borate gel. Gel should not come in
contact with
exposed wood surface.
8. Install borate rod in same hole as gel. Gel should not come in
contact with
exposed wood surface.
9. Pre-treat bare and sanded wood thoroughly with low viscosity
epoxy
coupling/bonding agent.
a) Allow coupling/bonding agent to penetrate wood surface for a
minimum of 10 minutes and maximum of 30 minutes, or as
recommended by the manufacturer. Avoid applying in direct sunlight
b) Remove any excess bonding agent with absorbing paper.
7. Apply epoxy repair compound over the uncured epoxy coupling
agent.
a) Epoxy fill shall have optimal contact with wood
b) Avoid inclusion of air pockets during application
c) Fill joints fill, even and smooth in one application
d) Allow full cure time as specified by manufacturer before
preparing for
finishes.
8. After curing, sand surface even and smooth. Transitions and
irregularities
between wood and epoxy shall not be visible after sanding.
9. If required, smooth any remaining irregularities with an
additional application
of epoxy repair compound. Always sand between coats.
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3.5 ADJUSTMENTS
A. Repair or replace all defective work at no additional cost to the
owner. |
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