15 RFI Borja Engineering and Construction Inc Response.pdf

FOR OFFICIAL USE ONLY

REQUEST FOR INFORMATION (RFI) FORM

RFI responses will be responded to as necessary in amendment format which will be sent via email and/or posted to SAM.gov.

Telephone requests for information will not be accepted or returned.

SOLICITATION: 36C26126R0018

NOTE: ALL PRE-PROPOSAL INQUIRIES SHALL BE SUBMITTED VIA EMAIL TO

alex.arter@va.gov BY AN EDITABLE USE OF THIS FORM. Please identify, in numerical sequence, each set of inquiries that you send.

Question(s) is/are regarding the solicitation, evaluation factors [ ]

Question(s) is/are regarding the statement of work, technical data [ ]

Company Name and Offeror: BEC

From (person submitting question):

SAMSON BORJA

Date of Inquiry: 2/16/2026

Phone Number: 858.327.0215

Proposal Inquiry: (Type inquiry below)

RFI #1 – In section 01 00 00, Under SOW F. Installation requirements. Please confirm vapor barrier is required? Can you confirm existing is concrete deck? Drawing shows Existing roof is wood? Please confirm where this application will be installed. There is no concrete deck on this project, the deck is plywood, use specifications for plywood deck, install per manufacturers instructions

RFI #2 – What is the R-value for this applicaiton? The specfication are not very clear. Sect 07 22 00 under 2.1 wants an average R-33 and any location R-10, can you clarify? The specification above is correct, for clarity, the R-10 requirement is a minimum R value at any location

RFI #3 - Would it be acceptable to replace the Tremco Kee Membrane with Carlisle Sure-Flex Kee HP membrane system.

See Attached. You may submit on a roofing system that is equal to the Tremco KEE system for VA review.

Add additional as necessary

RFI #4 - please confirm the PoP stated is for construction? Can we request an additional 90 days for design? You may request additional time from the Contracting Officer. However, the design work is noted as a task in the SOW.

mailto:alex.arter@va.gov

800-479-6832 | P.O. Box 7000 | Carlisle, PA 17013 | Fax: 717-245-7053 | www.carlislesyntec.com

Roofing Systems

Sure-Flex

Membrane

KEE HP

Overview

Carlisle’s Sure-Flex KEE HP (High Performance) membrane is manufactured using DuPont® Elvaloy® KEE HP resin modifier. The utilization of KEE HP enhances the performance of poly-vinyl chloride

(PVC) compounds by providing outstanding thermal stability and flexibility for use in more demanding applications. The higher molecular weight of

KEE HP results in slower migration to provide extended low- and high-temperature performance limits, increased chemical resistance, and outstanding microbial growth resistance when compared to standard KEE.

The physical properties of the membrane are enhanced by a tenacious anti-wicking polyester fabric that is encapsulated by thick top and bottom plies. The membrane’s smooth surfaces facilitate a permanent weld for a consistent, watertight, monolithic roof assembly.

Features and Benefits

» KEE HP resin modifier provides enhanced thermal stability, chemical resistance, fire resistance, and microbial growth resistance for use in the most demanding environments

» Fully formulated monolithic top-ply for withstanding long-term rooftop conditions

» Enhanced physical characteristics meeting ASTM D4434

Type IV requirements

» Antimicrobials throughout the polymer for increased resistance to mold, mildew, and algae growth

» Highly flexible with a wide window of weldability for ease of installation

» Wide range of membrane widths and thicknesses available

» Available colors:

White Gray Tan Light Gray

Sustainable Attributes

Carlisle SynTec Systems' focus has always been innovation - Innovation to solve problems, improve performance, reduce labor, and above all, improve sustainability. Carlisle is committed to driving sustainable and efficient processes in the design and manufacturing of our products.

» PVC polymer derived from less than 50% fossil fuels

» Up to 10% pre-consumer recycled content

» Fully recyclable when used in mechanically-attached systems

» 3rd-party verified Environmental Product Declaration available

» California Title 24 compliant*

» See Radiative Properties and LEED Information tables below for additional attributes

*White and light gray only.

Installation

Installation requires minimal labor and few components, making it quick and easy to install. Sheet seams are heat-welded together using hot-air welding equipment to create a monolithic, water-tight roof system.

Sure-Flex KEE HP is suitable for the following roof systems:

Fully-Adhered – membrane is adhered to a suitable substrate utilizing an appropriate bonding adhesive

Mechanically Fastened – membrane is attached to a suitable substrate utilizing plates and fasteners which are overlapped with membrane

Induction-Welded – membrane is attached to a suitable substrate via an induction welding tool being placed over the membrane where a fastened

PVC induction welding plate is located to weld the two components together

Review Carlisle specifications, product data sheets, and details for complete installation information.

http://www.carlislesyntec.com/

Precautions

» Sunglasses that filter out ultraviolet light are strongly recommended when working on reflective membranes. Roofing technicians should dress appropriately and wear sunscreen.

» Exercise caution when walking on wet membranes; membranes may be slippery when wet or due to frost and ice buildup

» Care must be exercised while working close to a roof edge when the surrounding area is snow-covered, as the roof edge may not be clearly visible.

» Use proper stacking procedures to ensure sufficient stability of the materials.

» Store membrane in its original, undisturbed plastic wrap in a cool, shaded area and cover with light-colored, breathable, waterproof tarpaulins.

» Membrane that has been exposed to the weather or contaminated with dirt must be prepared with Sure-Flex PVC/KEE HP Membrane Cleaner prior to hot-air welding.

Supplemental Approvals, Statements and Characteristics

1. KEE HP meets or exceeds the requirements of ASTM D4434 Standard

Specification for Poly(Vinyl Chloride) Sheet Roofing. KEE HP is classified as Type III and/or Type IV as defined by ASTM D4434.

2. UL 2218 Class 4 Rating for impact resistance.

Typical Properties and Characteristics

Physical Property

ASTM D4434

Requirement 50-mil 60-mil 80-mil

Thickness over scrim,

in. (mm) ASTM D4434 optical method average of 3 areas

0.016 min (0.40) 0.024 (0.61) 0.029 (0.74) 0.036 (0.91)

Weight, lbs/ft2 (kg/m2) No requirement 0.33

(1.61)

0.38 (1.86) 0.51 (2.49)

Breaking strength

(MD × CD), lbf (N) ASTM D751 grab method

275 min

(1223)

290 x 290 (1290 x 1290) 320 x 300 (1423 x 1334) 330 x 320 (1468 x 1423)

Elongation break of reinforcement (MD x CD), % ASTM D751 grab method

25 min 30 x 30 30 x 30 30 x 30

Tearing strength (

MD x CD), lbf (N) ASTM D751 proc. B, 8 in. x 8 in.

90 min (400) 120 x 125 (534 x 556) 120 x 125 (534 x 556) 140 x 150 (623 x 667)

Low temperature bend, ASTM D2136, no cracks 5x at -40°C PASS PASS (-46°C) PASS (-46°C) PASS (-46°C)

Linear dimensional change, % ASTM D1204, 6 hours at 176°F ±0.5 max 0.4 typ. 0.4 typ. 0.4 typ.

Ozone resistance, no cracks 7x ASTM D1149, 100pphm, 168 hrs

PASS PASS PASS PASS

Water absorption resistance, mass % ASTM D570, 166 hours at 158°F water

±3.0 max 1.25 0.87 0.89

Puncture resistance – Dynamic, J (ft-lbf) ASTM D5635 20 (14.7) PASS PASS PASS

Puncture resistance – Static, lbf (N) ASTM D5602 33 (145) 63.99* (285*) 99 (440) 99 (440)

Xenon-Arc resistance, no cracks/ crazing 10x, ASTM G155 0.35 W/m2 at 340-nm, 63°C

B.P.T. 12,600 kJ/m2 total radiant exposure 10,000 hours

PASS PASS PASS PASS

Properties after heat aging

ASTM D3045, 56 days at 176°F Breaking strength, % retained

Elongation reinf., % retained

90 min

90 min

90 min

90 min

90 min

90 min

90 min

90 min

Air Permeance, ASTM E2178 No Requirement PASS PASS PASS

Typical properties and characteristics are based on samples tested and are not guaranteed for all samples of this product. This data and information is intended as a guide and does not reflect the specification or specification range for any particular property of this product.

*Maxed out testing equipment

Carlisle and Sure-Flex are trademarks of Carlisle. Elvaloy and DuPont are registered trademarks of DuPont. 10.21.25 © 2025 Carlisle.

REPRINT CODE: 605258 PVC-1016 - “Sure-Flex KEE HP Membrane Product Data Sheet”

Radiative Properties for Cool Roof Rating

Council (CRRC), and LEED

*Rapid Ratings

Physical Property Test Method White

Tan

KEE HP

Gray

KEE HP

Light Gray

KEE HP

CRRC - Initial Solar

Reflectance

ASTM C1549 0.87 0.73 0.58 0.75

CRRC - Solar

Reflectance after

3 years

ASTM C1549

(uncleaned)

0.71 0.64 0.53 0.65*

CRRC - Initial

Thermal Emittance

ASTM C1371 0.89 0.88 0.88 0.89

CRRC - Thermal

Emittance after

3 years

ASTM C1371

(uncleaned)

0.88 0.89 0.88 0.89*

Solar Reflective

Index (SRI)

ASTM E1980 110 90 69 93

Solar Reflective

Index (SRI) SRI after

3 years

ASTM E1980 88 78 61 78*

Pre-Consumer Recycled Content 10%

Post-Consumer Recycled Content 0%

Solar Reflectance Index (SRI) White: 110, Tan: 90, Gray: 69, Light Gray: 93

Global Warming Potential (GWP) 50 mils: 5.5, 60 mils: 6.6, 80 mils: 8.8

Volatile Organic Compounds (VOC) Content N/A

Manufacturing Location(s) Greenville, IL

Corporate Sustainability Report (CSR)

Availability

Yes

Environmental Product Declaration

(EPD) Availability

Green Building Information

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FleeceBACK

Polyester Membrane

Overview

Carlisle’s FleeceBACK KEE HP (High Performance) polyester reinforced membrane is tough, durable, and versatile, making it ideal for a wide variety of re-roofing and new construction projects. Manufactured using a hot-melt extrusion process for complete scrim encapsulation, this product is available in total sheet thicknesses of 105, 115, and 135 mils.

FleeceBACK KEE HP polyester reinforced membrane offers exceptional weatherability, flexibility, and toughness due to its polyester reinforcing scrim, polyester fleece backing, and DuPont® Elvaloy® KEE HP copolymer.

The polyester reinforcing scrim provides the sheet with added breaking strength, tear strength and puncture resistance for fully adhered or mechanically attached applications; the fleece backing adds to the puncture-resistance of the membrane and provides a built-in separation layer against rough concrete decks or existing asphaltic-based roofing systems. Elvaloy

KEE HP, a solid plasticizer that won’t migrate out of the sheet over time, helps to ensure the membrane remains pliable and weldable as it ages and reduces the amount of smoke generated during the welding process.

Features and Benefits

» Available in white, gray, light gray, and tan and offered in 105-, 115-, and 135-mil thicknesses.

- 105-mil roll size = 10' x 100'

- 115-mil roll size = 5' x 100' and 10' x 100'

- 135-mil roll size = 10' x 75'

» Provides superior wind uplift performance and ratings (up to FM 1-990) due to a mechanical bond between the fleece and adhesive

» Labor-saving 10'-wide sheets result in 67% fewer seams than a modified bitumen system of comparable size, when used as a cap sheet

» Fleece backing enhances toughness, durability, and puncture-resistance

» Polyester reinforcing scrim provides exceptional puncture strength

» Low-volatility KEE HP plasticizer won’t migrate out of the sheet over time

» KEE HP membrane is highly resistant to chemical types, such as acids, restaurant oils, fats, and greases

» White and Light Gray KEE HP are California Title 24 compliant

» Passes UL-2218 Class 4 rating

» KEE HP contributes to a wide window of weldability and less smoke during the welding process

» Can contribute to LEED® (Leadership in Energy and Environmental

Design) credits

Installation

FleeceBACK KEE HP polyester reinforced membrane can be installed as a fully adhered or a mechanically attached system.

Mechanically Fastened Roofing System

The mechanically fastened system starts with approved insulation being fastened with a minimum of 5 fasteners per 4' x 8' board. The FleeceBACK KEE

HP membrane is then mechanically fastened to the deck using HP-X™ Fasteners and Piranha™ Plates or HP-XTRA Fasteners and Piranha XTRA Plates. Adjoining sheets of FleeceBACK KEE HP membrane are overlapped over the fasteners and plates and joined together with a minimum 1½"-wide hot-air weld.

Adhered Roofing System – Low Rise Foam

Insulation is mechanically fastened or adhered with Flexible FAST™

Adhesive to the roof deck. Spray-apply, splatter, or extrude adhesive onto the substrate, and allow foam to develop string/body/gel prior to setting

FleeceBACK membrane into the adhesive. Roll FleeceBACK membrane with a 30"-wide, 150-pound (68 kg) segmented weighted roller to ensure full embedment. Splices are hot-air welded.

Adhered Roofing System – Water Based

HydroBond™ can be applied to the approved substrate with a medium nap roller. Once the adhesive has been applied, roll the membrane in place. To prevent over-drying, Carlisle recommends applying the adhesive

3'– 4' at a time ahead of the roll. Immediately broom the membrane starting from the center and working out to the sides of the sheet using a soft bristle push broom to work out any air bubbles. Immediately after brooming, roll the adhered membrane in two directions in a crossways pattern using a minimum 150-lb (68 kg) segmented membrane roller.

Adhered Roofing System – Multiple-Ply

Insulation is mechanically fastened or adhered with Flexible FAST Adhesive, Type III, IV, or modified asphalt to the roof deck. When adhering insulation with asphalt, the insulation boards are limited to 4' x 4'. Cover boards are required over the insulation for hot asphalt installations. If a two-ply system is specified, install the SureMB Modified Base Ply with hot asphalt or Carlisle

Cold Applied Adhesive over an approved substrate. Apply FleeceBACK

KEE HP cap sheet membrane over the base ply substrate with Flexible

FAST Adhesive, Carlisle Cold Applied Adhesive, SBS, or SEBS Type III or IV asphalt. FleeceBACK KEE HP cap sheet membrane may be adhered directly to existing smooth BUR, mineral cap sheet, or SBS modified bitumen after priming the surface with cutback asphalt primer.

Review Carlisle specifications and details for complete installation information.

Radiative Properties for Cool Roof Rating Council (CRRC), and LEED

FleeceBACK KEE HP Polyester Membrane

Supplemental Approvals, Statements, and

Characteristics

» FleeceBACK KEE HP meets or exceeds the requirements of ASTM D4434

Standard Specification for Poly (Vinyl Chloride) Sheet Roofing. FleeceBACK

KEE HP is classified as a Type III or a Type IV as defined by ASTM D4434.

Precautions

» Use proper stacking procedures to ensure sufficient stability of the materials.

» Exercise caution when walking on wet membrane; membranes may be slippery when wet.

» Sunglasses which filter out ultraviolet light are strongly recommended since white surfaces are highly reflective to sunlight. Roofing technicians should dress appropriately and wear sunscreen.

» White surfaces reflect heat and may become slippery due to frost and ice accumulation.

» Care must be exercised when working close to a roof edge, particularly when the surrounding area is snow-covered, as the roof edge may not be clearly visible.

» FleeceBACK membrane rolls must be tarped and elevated to keep them dry prior to installation. If the fleece gets wet, use a wet vac system to help remove moisture from the fleece.

» KEE HP membrane that has been exposed to the weather must be prepared with Carlisle’s PVC & KEE HP Membrane Cleaner prior to hot-air welding.

Physical Property ASTM D4434

Requirement 105-mil 115-mil 135-mil

Thickness over fleece No requirement

50-mil 60-mil 80-mil

Membrane Thickness Over

Scrim, in. (mm) ASTM D4434 optical method, average of 3 areas

0.016 min

(0.40)

0.024 (0.61) 0.029 (0.74) 0.036

(0.91)

Weight, lbs/ft2 (kg/m2) No requirement

0.38 0.46 0.59

Breaking strength (MD x CD), lbf/ in (kN/m) ASTM D751 grab method

200 min

(35)

410 x 360

(72 x 63)

450 x 410

(79 x 72)

500 x 490

(87 x 86)

Elongation break of reinforcement (MD x CD), %

ASTM D751 grab method

15 x 15 min

For reinforcing fabric only

35 x 30 35 x 30 35 x 30

Tearing strength (MD x CD), lbf (N) ASTM D751 proc. B, 8 in. x 8 in.

45 min (200) 178 x 162

(791 x 720)

147 x 174

(653 x 774)

152 x 183

(676 x 814)

Air Permeance (membrane only)

ASTM E2178

Pass Pass Pass

Low temperature bend, ASTM

D2136, no cracks 5x at -40°C

PASS PASS PASS PASS

Linear dimensional change, %

ASTM D1204, 6 hours at 176°F

±0.5 max 0.4 typ. 0.4 typ. 0.4 typ.

Water absorption resistance, mass % ASTM D570, 166 hours at

158°F water

±3.0 max 1.25 0.87 0.89

Puncture resistance - Dynamic, J

(ft-lbf) ASTM D5635

20 (14.7) 32.5 40 42.5

Puncture resistance - Static, lbf (N) ASTM D5602

33 (145) 63.99 63.99 63.99

Puncture Resistance - Federal

Puncture (Max. Load in lbf) FTM 101C

No requirement

332 384 482

Xenon-Arc resistance, no cracks/crazing 10x, ASTM G155

0.35 W/m2 at 340-nm, 63°C

B.P.T. 12,600 kJ/m2 total radiant exposure 10,000 hours

PASS PASS PASS PASS

Properties after heat aging

ASTM D3045, 56 days at 176°F

Breaking strength, % retained

Elongation reinf., % retained

90 min

Typical properties and characteristics are based on samples tested and are not guaranteed for all samples of this product. This data and information is intended as a guide and does not reflect the specification range for any particular property of this product.

Pre-consumer Recycled Content 10%

Post-consumer Recycled Content 0%

Manufacturing Location Greenville, IL

Solar Reflectance Index (SRI), Initial White: 110, Tan: 90, Gray 69, Light Gray: 77

06.23.25 © 2025 Carlisle.

FB-9312 - “FleeceBACK KEE HP Polyester Membrane Product Data Sheet”

800-479-6832 | P.O. Box 7000 | Carlisle, PA 17013 | Fax: 717-245-7053 | www.carlislesyntec.com

Carlisle, FleeceBACK, HydroBond, HP-X, Piranha, and FAST are trademarks of Carlisle.

LEED is a registered trademark owned by the U.S. Green Building Council. Elvaloy is a registered trademark of DuPont. DuPont is a registered trademark of E. I. du Pont de Nemours and Company.

LEED Information

Typical Properties and Characteristics

Physical Property

Test Method

White

KEE HP

Tan

KEE HP

Gray

KEE HP

Light Gray

KEE HP

CRRC -

Initial Solar Reflectance

ASTM C1549 0.87 0.73 0.58 0.75

CRRC -

Solar Reflectance after

3 years

ASTM C1549

(uncleaned)

0.71 0.64 0.53 0.64

CRRC -

Initial Thermal Emittance

ASTM C1371 0.89 0.88 0.88 0.89

CRRC -

Thermal Emittance after

3 years

ASTM C1371

(uncleaned)

0.87 0.89 0.88 0.89

Solar Reflective Index (SRI) ASTM E1980 110 90 69 93

Solar Reflective Index (SRI)

SRI after 3 years

ASTM E1980 88 78 61 77