<PAGE>

                                                                   NO. CW-____

         THE SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE BEEN ACQUIRED FOR
INVESTMENT AND HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS
AMENDED OR ANY STATE SECURITIES LAWS. SUCH SECURITIES MAY NOT BE SOLD OR
TRANSFERRED IN THE ABSENCE OF SUCH REGISTRATION OR AN EXEMPTION THEREFROM UNDER
SAID ACT AND ANY APPLICABLE STATE SECURITIES LAWS.

                       WARRANT TO PURCHASE _______ SHARES
                               OF COMMON STOCK OF
                                IMPROVENET, INC.
                         (VOID AFTER NOVEMBER 23, 2003)

This certifies that ______________ or its assigns (the "HOLDER"), for value
received, is entitled to purchase from IMPROVENET, INC., a Delaware corporation
(the "COMPANY"), having a place of business at 720 Bay Road, Suite 200, Redwood
City, California, a maximum of ________ fully paid and nonassessable shares of
the Company's Common Stock ("COMMON STOCK") for cash at a price equal to $0.01
per share (the "STOCK PURCHASE PRICE") at any time or from time to time up to
and including 5:00 p.m. (Pacific time) five years from the date of this Warrant,
(the "EXPIRATION DATE"), upon surrender to the Company at its principal office
(or at such other location as the Company may advise the Holder in writing) of
this Warrant properly endorsed with the Form of Subscription attached hereto
duly filled in and signed and, if applicable, upon payment in cash or by check
of the aggregate Stock Purchase Price for the number of shares for which this
Warrant is being exercised determined in accordance with the provisions hereof.
The Stock Purchase Price and the number of shares purchasable hereunder are
subject to adjustment as provided in Section 3 of this Warrant.

This Warrant is subject to the following terms and conditions:

         1. EXERCISE; ISSUANCE OF CERTIFICATES; PAYMENT FOR SHARES.

              1.1 GENERAL. This Warrant is exercisable at the option of the
holder of record hereof, at any time or from time to time, up to the Expiration
Date or as specified in Section 3.3 hereto for all or any part of the shares of
Common Stock (but not for a fraction of a share) which may be purchased
hereunder. The Company agrees that the shares of Common Stock purchased under
this Warrant shall be and are deemed to be issued to the Holder hereof as the
record owner of such shares as of the close of business on the date on which
this Warrant shall have been surrendered, properly endorsed, the completed,
executed Form of Subscription delivered and payment made for such shares.
Certificates for the shares of Common Stock so purchased, together with any
other securities or property to which the Holder hereof is entitled upon such
exercise, shall be delivered to the Holder hereof by the Company at the
Company's expense within a reasonable time after the rights represented by this
Warrant have been so exercised. In case of a purchase of less than all the
shares which may be purchased under this Warrant, the Company shall cancel this
Warrant and execute and deliver a new Warrant or Warrants of like tenor for the
balance of the shares purchasable under the Warrant surrendered upon such
purchase to the Holder hereof within a reasonable time. Each stock certificate
so delivered shall be in such denominations of Common Stock as may be requested
by the Holder hereof and shall be registered in the name of such Holder.

<PAGE>

              1.2 NET ISSUE EXERCISE. Notwithstanding any provisions herein to
the contrary, if the fair market value of one share of the Company's Common
Stock is greater than the Stock Purchase Price (at the date of calculation as
set forth below), in lieu of exercising this Warrant for cash, the Holder may
elect to receive shares equal to the value (as determined below) of this Warrant
(or the portion thereof being canceled) by surrender of this Warrant at the
principal office of the Company together with the properly endorsed Form of
Subscription and notice of such election in which event the Company shall issue
to the Holder a number of shares of Common Stock computed using the following
formula:

                           X = Y (A-B)
                               -------
                                  A

                                            Where X = the number of shares of
                                            Common Stock to be issued to the
                                            Holder

                                            Y = the number of shares of Common
                                            Stock purchasable under the Warrant
                                            or, if only a portion of the Warrant
                                            is being exercised, the portion of
                                            the Warrant being canceled (at the
                                            date of such calculation)

                                            A = the fair market value of one
                                            share of the Company's Common Stock
                                            (at the date of such calculation)

                                            B = Stock Purchase Price (as
                                            adjusted to the date of such
                                            calculation)

         For purposes of the above calculation, fair market value of one share
of Common Stock shall be determined by the Company's Board of Directors in good
faith; provided, however, that in the event the Company makes an initial public
offering of its common stock the fair market value per share shall be the per
share offering price to the public of the Company's initial public offering if
this Warrant is exercised prior to or upon the closing of such initial public
offering, and if exercised after the closing of the initial public offering the
fair market value of one share shall be the average of the closing prices quoted
on the Nasdaq National Market or any other exchange in which the Common Stock is
listed, for the five trading dates prior to the date of exercise.

         2. SHARES TO BE FULLY PAID; RESERVATION OF SHARES. The Company
covenants and agrees that all shares of Common Stock which may be issued upon
the exercise of the rights represented by this Warrant will, upon issuance, be
duly authorized, validly issued, fully paid and nonassessable and free from all
preemptive rights of any stockholder and free of all taxes, liens and charges
with respect to the issue thereof. The Company further covenants and agrees
that, during the period within which the rights represented by this Warrant may
be exercised, the Company will at all times have authorized and reserved, for
the purpose of issue or transfer upon exercise of the subscription rights
evidenced by this Warrant, a sufficient number of shares of authorized but
unissued Common Stock, or other securities and property, when and as required to
provide for the exercise of the rights represented by this Warrant. The Company
will take all such action as may be necessary to assure that such shares of
Common Stock may be issued as provided herein without violation of any
applicable law or regulation, or of any requirements of any domestic securities
exchange upon which the Common Stock may be listed; provided, however, that the
Company shall not be required to effect a registration under federal or state
securities laws with respect to such exercise. The Company will not take any
action which would result


                                    2.
<PAGE>

in any adjustment of the Stock Purchase Price (as set forth in Section 3
hereof) if the total number of shares of Common Stock issuable after such
action upon exercise of all outstanding warrants, together with all shares of
Common Stock then outstanding and all shares of Common Stock then issuable
upon exercise of all options and upon the conversion of all convertible
securities then outstanding, would exceed the total number of shares of
Common Stock then authorized by the Company's Third Restated Certificate of
Incorporation.

         3. ADJUSTMENT OF STOCK PURCHASE PRICE AND NUMBER OF SHARES. The Stock
Purchase Price and the number of shares purchasable upon the exercise of this
Warrant shall be subject to adjustment from time to time upon the occurrence of
certain events described in this Section 3. Upon each adjustment of the Stock
Purchase Price, the Holder of this Warrant shall thereafter be entitled to
purchase, at the Stock Purchase Price resulting from such adjustment, the number
of shares obtained by multiplying the Stock Purchase Price in effect immediately
prior to such adjustment by the number of shares purchasable pursuant hereto
immediately prior to such adjustment, and dividing the product thereof by the
Stock Purchase Price resulting from such adjustment.

              3.1 SUBDIVISION OR COMBINATION OF STOCK. In case the Company shall
at any time subdivide its outstanding shares of Common Stock into a greater
number of shares, the Stock Purchase Price in effect immediately prior to such
subdivision shall be proportionately reduced, and conversely, in case the
outstanding shares of Common Stock of the Company shall be combined into a
smaller number of shares, the Stock Purchase Price in effect immediately prior
to such combination shall be proportionately increased.

              3.2 DIVIDENDS IN COMMON STOCK, OTHER STOCK, PROPERTY,
RECLASSIFICATION. If at any time or from time to time the Holders of Common
Stock (or any shares of stock or other securities at the time receivable upon
the exercise of this Warrant) shall have received or become entitled to receive,
without payment therefor,

                  (a) Common Stock or any shares of stock or other securities
which are at any time directly or indirectly convertible into or exchangeable
for Common Stock, or any rights or options to subscribe for, purchase or
otherwise acquire any of the foregoing by way of dividend or other distribution,

                  (b) any cash paid or payable otherwise than as a cash
dividend, or

                  (c) Common Stock or additional stock or other securities or
property (including cash) by way of spinoff, split-up, reclassification,
combination of shares or similar corporate rearrangement, (other than shares of
Common Stock issued as a stock split or adjustments in respect of which shall be
covered by the terms of Section 3.1 above),

then and in each such case, the Holder hereof shall, upon the exercise of this
Warrant, be entitled to receive, in addition to the number of shares of Common
Stock receivable thereupon, and without payment of any additional consideration
therefor, the amount of stock and other securities and property (including cash
in the cases referred to in clauses (b) and (c)) which such Holder would hold on
the date of such exercise had he been the holder of record of such Common Stock
as of the date on which holders of Common Stock received or became entitled to
receive such shares or all other additional stock and other securities and
property.


                                    3.
<PAGE>

              3.3 REORGANIZATION, RECLASSIFICATION, CONSOLIDATION, MERGER OR
SALE. If any recapitalization, reclassification or reorganization of the capital
stock of the Company, or any consolidation or merger of the Company with another
corporation, or the sale of all or substantially all of its assets or other
transaction shall be effected in such a way that holders of Common Stock shall
be entitled to receive stock, securities, or other assets or property (an
"ORGANIC CHANGE"), then, as a condition of such Organic Change, lawful and
adequate provisions shall be made by the Company whereby the Holder hereof shall
thereafter have the right to purchase and receive (in lieu of the shares of the
Common Stock of the Company immediately theretofore purchasable and receivable
upon the exercise of the rights represented hereby) such shares of stock,
securities or other assets or property as may be issued or payable with respect
to or in exchange for a number of outstanding shares of such Common Stock equal
to the number of shares of such stock immediately theretofore purchasable and
receivable upon the exercise of the rights represented hereby; provided,
however, that in the event the value of the stock, securities or other assets or
property (determined in good faith by the Board of Directors of the Company)
issuable or payable with respect to one share of the Common Stock of the Company
immediately theretofore purchasable and receivable upon the exercise of the
rights represented hereby is in excess of the Stock Purchase Price hereof
effective at the time of a merger and securities received in such
reorganization, if any, are publicly traded, then this Warrant shall expire
unless exercised prior to such Organic Change. In the event of any Organic
Change, appropriate provision shall be made by the Company with respect to the
rights and interests of the Holder of this Warrant to the end that the
provisions hereof (including, without limitation, provisions for adjustments of
the Stock Purchase Price and of the number of shares purchasable and receivable
upon the exercise of this Warrant) shall thereafter be applicable, in relation
to any shares of stock, securities or assets thereafter deliverable upon the
exercise hereof. The Company will not effect any such consolidation, merger or
sale unless, prior to the consummation thereof, the successor corporation (if
other than the Company) resulting from such consolidation or the corporation
purchasing such assets shall assume by written instrument reasonably
satisfactory in form and substance to the Holders of a majority of the warrants
to purchase Common Stock then outstanding, executed and mailed or delivered to
the registered Holder hereof at the last address of such Holder appearing on the
books of the Company, the obligation to deliver to such Holder such shares of
stock, securities or assets as, in accordance with the foregoing provisions,
such Holder may be entitled to purchase.

              3.4 CERTAIN EVENTS. If any change in the outstanding Common Stock
of the Company or any other event occurs as to which the other provisions of
this Section 3 are not strictly applicable or if strictly applicable would not
fairly protect the purchase rights of the Holder of the Warrant in accordance
with such provisions, then the Board of Directors of the Company shall make an
adjustment in the number and class of shares available under the Warrant, the
Stock Purchase Price or the application of such provisions, so as to protect
such purchase rights as aforesaid. The adjustment shall be such as will give the
Holder of the Warrant upon exercise for the same aggregate Stock Purchase Price
the total number, class and kind of shares as he would have owned had the
Warrant been exercised prior to the event and had he continued to hold such
shares until after the event requiring adjustment.


                                    4.
<PAGE>

              3.5 NOTICES OF CHANGE.

                  (a) Immediately upon any adjustment in the number or class of
shares subject to this Warrant and of the Stock Purchase Price, the Company
shall give written notice thereof to the Holder, setting forth in reasonable
detail and certifying the calculation of such adjustment.

                  (b) The Company shall give written notice to the Holder at
least ten business days prior to the date on which the Company closes its books
or takes a record for determining rights to receive any dividends or
distributions.

                  (c) The Company shall also give written notice to the Holder
at least thirty (30) business days prior to the date on which an Organic Change
shall take place.

         4. ISSUE TAX. The issuance of certificates for shares of Common Stock
upon the exercise of the Warrant shall be made without charge to the Holder of
the Warrant for any issue tax (other than any applicable income taxes) in
respect thereof; provided, however, that the Company shall not be required to
pay any tax which may be payable in respect of any transfer involved in the
issuance and delivery of any certificate in a name other than that of the then
Holder of the Warrant being exercised.

         5. MARKET STAND-OFF AGREEMENT. The Company (or a representative of the
underwriters) may, in connection with an underwritten registration of the
offering of any securities of the Company under the Act, require that the Holder
not sell, dispose of (other than to donees who agree to be similarly bound),
transfer, make any short sale of, grant any option for the purchase of, or enter
into any hedging or similar transaction with the same economic effect as a sale,
any common stock or other securities of the Company held by the undersigned (the
"RESTRICTED SECURITIES"), for a period of time specified by the underwriters(s)
(not to exceed one hundred eighty (180) days) following the effective date of
the registration statement of the Company filed under the Act relating to the
Company's initial public offering. The Holder agrees to enter into any
agreements as may be reasonably requested by the Company and/or the
underwriter(s) which are consistent with the foregoing or which are necessary to
give further effect thereto. In order to enforce the foregoing covenant, the
Company may impose stop-transfer instructions with respect to the Restricted
Securities held by the Holder until the end of such period.

         6. CLOSING OF BOOKS. The Company will at no time close its transfer
books against the transfer of any warrant or of any shares of Common Stock
issued or issuable upon the exercise of any warrant in any manner which
interferes with the timely exercise of this Warrant.

         7. NO VOTING OR DIVIDEND RIGHTS; LIMITATION OF LIABILITY. Nothing
contained in this Warrant shall be construed as conferring upon the Holder
hereof the right to vote or to consent or to receive notice as a stockholder of
the Company or any other matters or any rights whatsoever as a stockholder of
the Company. No dividends or interest shall be payable or accrued in respect of
this Warrant or the interest represented hereby or the shares purchasable
hereunder until, and only to the extent that, this Warrant shall have been
exercised. No provisions hereof, in the absence of affirmative action by the
holder to purchase shares of Common Stock, and no mere enumeration herein of the
rights or privileges of the holder hereof, shall give rise to any liability of
such Holder for the Stock Purchase Price or as a stockholder of the Company,
whether such liability is asserted by the Company or by its creditors.


                                    5.
<PAGE>

         8. WARRANTS TRANSFERABLE. Subject to compliance with applicable federal
and state securities laws, this Warrant and all rights hereunder are
transferable, in whole or in part, without charge to the holder hereof (except
for transfer taxes), upon surrender of this Warrant properly endorsed. Each
taker and holder of this Warrant, by taking or holding the same, consents and
agrees that this Warrant, when endorsed in blank, shall be deemed negotiable,
and that the holder hereof, when this Warrant shall have been so endorsed, may
be treated by the Company, at the Company's option, and all other persons
dealing with this Warrant as the absolute owner hereof for any purpose and as
the person entitled to exercise the rights represented by this Warrant, or to
the transfer hereof on the books of the Company any notice to the contrary
notwithstanding; but until such transfer on such books, the Company may treat
the registered owner hereof as the owner for all purposes.

         9. RIGHTS AND OBLIGATIONS SURVIVE EXERCISE OF WARRANT. The rights and
obligations of the Company, of the holder of this Warrant and of the holder of
shares of Common Stock issued upon exercise of this Warrant, shall survive the
exercise of this Warrant.

         10. MODIFICATION AND WAIVER. This Warrant and any provision hereof may
be changed, waived, discharged or terminated only by an instrument in writing
signed by the party against which enforcement of the same is sought.

         11. NOTICES. Any notice, request or other document required or
permitted to be given or delivered to the holder hereof or the Company shall be
delivered or shall be sent by certified mail, postage prepaid, to each such
holder at its address as shown on the books of the Company or to the Company at
the address indicated therefor in the first paragraph of this Warrant or such
other address as either may from time to time provide to the other.

         12. BINDING EFFECT ON SUCCESSORS. Except as specified in Section 3.3
hereof, this Warrant shall be binding upon any corporation succeeding the
Company by merger, consolidation or acquisition of all or substantially all of
the Company's assets. All of the obligations of the Company relating to the
Common Stock issuable upon the exercise of this Warrant shall survive the
exercise and termination of this Warrant. All of the covenants and agreements of
the Company shall inure to the benefit of the successors and assigns of the
holder hereof.

         13. DESCRIPTIVE HEADINGS AND GOVERNING LAW. The description headings of
the several sections and paragraphs of this Warrant are inserted for convenience
only and do not constitute a part of this Warrant. This Warrant shall be
construed and enforced in accordance with, and the rights of the parties shall
be governed by, the laws of the State of New York. Each party hereto hereby
irrevocably and unconditionally submits to the exclusive jurisdiction of the
state and federal courts located in the State of New York for any actions, suits
or proceedings arising out of or relating to this Warrant and the transactions
contemplated hereby. Each party hereto agrees not to commence any action, suit
or proceeding relating thereto except in such courts. The parties hereto
irrevocably and unconditionally waive any objection to the laying of venue in
any action, suit or proceeding arising out of this Warrant or the transactions
contemplated hereby, in such state or federal courts aforesaid and hereby
further irrevocably and unconditionally waive and agree not to plead or claim in
any such court that any such action, suit or proceeding brought in any such
court has been brought in an inconvenient forum.


                                    6.
<PAGE>

         THE PARTIES HEREBY WAIVE TRIAL BY JURY IN ANY JUDICIAL PROCEEDING TO
WHICH THEY ARE PARTIES INVOLVING, DIRECTLY OR INDIRECTLY, ANY MATTER IN ANY WAY
ARISING OUT OF, RELATED TO OR CONNECTED WITH THIS WARRANT.

         14. LOST WARRANTS. The Company represents and warrants to the Holder
hereof that upon receipt of evidence reasonably satisfactory to the Company of
the loss, theft, destruction, or mutilation of this Warrant and, in the case of
any such loss, theft or destruction, upon receipt of an indemnity reasonably
satisfactory to the Company, or in the case of any such mutilation upon
surrender and cancellation of such Warrant, the Company, at its expense, will
make and deliver a new Warrant, of like tenor, in lieu of the lost, stolen,
destroyed or mutilated Warrant.

         15. FRACTIONAL SHARES. No fractional shares shall be issued upon
exercise of this Warrant. The Company shall, in lieu of issuing any fractional
share, pay the holder entitled to such fraction a sum in cash equal to such
fraction multiplied by the then effective Stock Purchase Price.



            [THE REMAINDER OF THIS PAGE IS INTENTIONALLY LEFT BLANK.]


                                    7.
<PAGE>

         IN WITNESS WHEREOF, the Company has caused this Warrant to be duly
executed by its officers, thereunto duly authorized this ____ day of November,
1999.

                                                    IMPROVENET, INC.
                                                    a Delaware corporation



                                                    By:
                                                      --------------------------
                                                           President


ATTEST:

-----------------------------
Secretary

<PAGE>

                                    EXHIBIT A

                                SUBSCRIPTION FORM

                                                Date:  _________________, 19___

ImproveNet, Inc.
720 Bay Road, Suite 200
Redwood City, CA 94063-2469

Attn:  President

Ladies and Gentlemen:

/ /      The undersigned hereby elects to exercise the warrant issued to it by
         ImproveNet, Inc. (the "Company") and dated November , 1999 Warrant No.
         CW-4 (the "WARRANT") and to purchase thereunder ______________________
         __________________________________ shares of the Common Stock of the
         Company (the "SHARES") at a purchase price of $0.01 per Share or an
         aggregate purchase price of __________________________________ Dollars
         ($__________) (the "PURCHASE PRICE").

/ /      The undersigned hereby elects to convert _______________________
         percent (____%) of the value of the Warrant pursuant to the provisions
         of Section 1.2 of the Warrant.

         Pursuant to the terms of the Warrant the undersigned has delivered the
Purchase Price herewith in full in cash or by certified check or wire transfer.

                                                  Very truly yours,


                                                  ----------------------------
                                                  By:
                                                    --------------------------
                                                  Title:
                                                       -----------------------


<PAGE>

                      SCHEDULE OF COMMON STOCK WARRANTS

               <TABLE>
               <CAPTION>
               -----------------------------------------------
               NAME                                    SHARES
               <S>                                     <C>
               -----------------------------------------------
               Owens Corning                           150,000
               -----------------------------------------------
               Microsoft Corporation                   100,000
               -----------------------------------------------
               Cendant Finance Holding Corporation      75,000
               -----------------------------------------------
               The Dow Chemical Company                 35,000
               -----------------------------------------------
               E.I. du Pont deNemours and Company       35,000
               -----------------------------------------------
               Armstrong.com Holding Corporation        25,000
               -----------------------------------------------
               </TABLE>