IOWA DEPARTMENT OF NATURAL RESOURCES ADDENDUM No. 1

LAND & WATERS BUREAU

6200 PARK AVE., STE. 200, DES MOINES, IA 50321

LAKE OF THREE FIRES STATE PARK

WINDOW REPLACEMENT - REBID

TAYLOR COUNTY, IOWA

PROJECT NUMBER: 26-04-87-03

FEBRUARY 20, 2026

This Addendum is issued to modify, explain or correct the original Drawings and Specifications, and is hereby made a part of the Contract Documents. Please attach this Addendum to the Project Manual in your possession. Insert the number and issue date of this Addendum in the blank space provided on the Proposal Form.

Scope of Work:

1. Revise window schedule:

Window A (Qty. 4 per cabin): 2-2440(4840 overall) Single-Hung(Operable) – Replicate Muntins with similar SDL’s at exterior and interior at all window locations. Include SDL’s in all single-hung windows.

Window B (Qty. 1 per cabin): 3224 Picture Window(Non-Operable) - Replicate Muntins with similar SDL’s at exterior and interior at all window locations. Include SDL’s in all picture windows.

Window C (Qty. 1 per cabin): 2436 Picture Window(Non-Operable) - w/obscure privacy glass @ exterior IGU pane. Exterior SDL’s only and only where existing.

Specifications:

1. Revise Section 2.01 Manufacturers – A. Wood Windows:

1. Pella Corporation; Reserve Traditional; www.pellacommercial.com/#sle.

2. Marvin Windows; Ultimate Windows: www.marvin.com/#sle.

3. Quaker Window Products Company; Brighton or TimberVu;

www.quakerresidentialwindows.com/#sle.

4. Lincoln Windows; www.lincolnwindows.com/

5. Kolbe Windows; Ultra Series: https://www.kolbewindows.com/

6. Andersen Windows; E-Series; www.andersenwindows.com

2. Revise Section 2.02 Wood Windows - A. Wood frame and sash: factory fabricated and assembled:

1. Exterior Finish(Wood or Wood Clad): Factory finished. Colors for interior and exterior to be selected by architect from manufacturers standard line.

2. Interior Finish(Wood): Factory or field finished. Factory finished colors for interior and exterior to be selected by architect from manufacturers standard line. Contractor to submit stain and finish samples of field finished wood to DNR for review prior to finishing work commencing.

3. Configuration: As indicated in window schedule. Replacement windows to match existing window detailing including muntin spacings and profile. Field verify all sizes and dimensions. Standard sized windows closest to original size shall be acceptable so as gaps between existing rough framing and window frame do not exceed 1 1/2”. Existing rough framing at windows shall not be https://www.kolbewindows.com/ http://www.andersenwindows.com/ modified. Trim work at exterior and interior may be modified or replaced but must closely match existing trims in dimension, tone and finish.

4. Factory glazed; dry glazing method.

5. Wood Species: Clear pine or Fir, preservative treated using treatment type suitable for required finish.

6. Frame and Sash Members: Mortise and tenon joints. Glue and steel pin joints to hairline fit, weather tight.

7. Transparent Finish: Finger joints not permitted in units intended for transparent finish.

8. Weather Stop Flange: Continuous at perimeter of unit.

9. Clearances and Shim Spacing: Minimum required for installation and dynamic movement of perimeter seal.

10. Fasteners: Concealed from view.

11. Internal Drainage of Glazing Spaces to Exterior: Weep holes.

12. Insect Screen: Minimal profile metal frame. Color selected by submittal from manufacturers full range of available colors. Location: Exterior at single hung operable.

13. Operable Units: Double weatherstripped.

3. Revise Section 2.03 Components:

A. Glazing: Double glazed, clear, argon filled, with glass thicknesses as recommended by manufacturer for regional wind conditions and related code requirements.

A. Frames: Profile must closely match thickness and shape of existing windows; flush solid wood glass stops of screw fastened type, sloped for positive drainage.

B. Muntins: Must closely match existing window spacings, tone/finish and profile. External wood muntins must be provided where existing window muntins are external. Internal SDL type muntins may be provided only in addition to external muntins.

C. Sills: Wood. sloped for positive drainage; fits under sash and projects at least 1/2 inch (12 mm) beyond exterior face of wall; single piece full width of opening.

D. Insect Screens: Extruded aluminum frame with mitered and reinforced corners; screen mesh taut and secure to frame; secured to window with adjustable supports allowing screen removal without use of tools.

1. Supports: Spring-loaded steel pins; four per screen unit.

2. Screen Mesh: Vinyl-coated fiberglass preferred or window manufacturer's high-transparency mesh.

3. Frame Finish: Baked enamel or manufacturer series standard(color to be determined by

Architect or project Engineer via submittal)

E. Operable Sash Weatherstripping: Wool pile; permanently resilient, profiled to effect weather seal.

F. Fasteners: Stainless steel.

G. Sealant and Backing Materials:

1. Perimeter Sealant: Appropriate for application.

2. Sealant Used Within System (Not Used for Glazing): Appropriate for application.

H. Wood for Casings and Trim: Clear pine or Fir, clear preservative treated, of type suitable for required finish.

1. Finger joints not permitted in transparent finished exposed surfaces.

I. Flashing: Provide related flashings, with necessary anchors and attachment devices.

J. Sealant for Setting Sills, Stools, Aprons, and Sill Flashing: Non-curing butyl type.

4. ADDITIONAL CLARIFICATIONS:

1. It is contractors responsibility to verify windows having muntins. All windows having muntins must be replaced with like windows and per specification requirements.

2. It is contractors option to field finish interior(or exterior) wood frames to match existing. Each manufacturer offers standard finish options that are a close match to existing wood and frames.

Contractor is to submit color options from manufacturers standard offerings or submit field finish stain and varnish products, colors, and proposed finishing procedure for DNR review prior to ordering windows and prior to any finishing work.

3. Please bid using window sizes specified in revised scope of work window schedule only.

Variations or required field adjustments prior to ordering will be handled in the field.