Document:

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                                                                   Exhibit 10.30

                               FIRST AMENDMENT TO
                   THIRD AMENDED AND RESTATED CREDIT AGREEMENT

                  THIS FIRST AMENDMENT TO THIRD AMENDED AND RESTATED CREDIT
AGREEMENT (the "FIRST AMENDMENT") dated as of September 29, 2000 by and among
ZARING HOMES, INC. ("ZARING HOMES"), ZARING HOLDINGS, INC., HEARTHSIDE HOMES,
LLC, ZARING NATIONAL LAND HOLDING CORPORATION, ZARING NATIONAL HOMES HOLDING
CORPORATION, and ZARING LEASING, LLC, as Borrowers and Guarantors, ZARING
NATIONAL CORPORATION ("ZARING NATIONAL"), ZARING HOMES OF INDIANA, L.L.C. and
ZARING HOMES KENTUCKY, LLC ("ZARING HOMES KENTUCKY"), as Guarantors, the Banks
set forth below, BANK OF AMERICA, N.A. and BANK ONE, NA, as Co-Agents, and PNC
BANK, NATIONAL ASSOCIATION, in its capacity as Agent for the Banks (the
"AGENT").

                              W I T N E S S E T H:

                  WHEREAS, the Borrowers, the Guarantors, the Banks, the
Co-Agents and the Agent are parties to that certain Third Amended and Restated
Credit Agreement dated as of April 13, 2000 (the "CREDIT AGREEMENT"); and

                  WHEREAS, the Borrowers and the Guarantors have requested that
certain covenants of the Credit Agreement be amended as set forth herein;

                  WHEREAS, the Banks are willing to enter into such amendments
on the terms and subject to the conditions set forth herein.

                  NOW, THEREFORE, the parties hereto, in consideration of their
mutual covenants and agreements hereinafter set forth and intending to be
legally bound hereby, covenant and agree as follows:

         1. DEFINITIONS.

         Defined terms used herein and not otherwise defined herein shall have
the meanings given to them in the Credit Agreement, as amended by this First
Amendment.

         2. AMENDMENT OF CREDIT AGREEMENT.

                  A. Section 8.2(f) [Liquidations, Mergers, Consolidations,
Acquisitions] of the Credit Agreement is hereby amended by deleting such section
in its entirety and inserting in lieu thereof the following:

<PAGE>   2

                  (f) LIQUIDATIONS, MERGERS, CONSOLIDATIONS, ACQUISITIONS

                           Each of the Loan Parties shall not dissolve,
         liquidate or wind up its affairs, or become a party to any merger or
         consolidation, or acquire by purchase, lease or otherwise all or
         substantially all of the assets or capital of any other person;
         PROVIDED that (i) any Loan Party other than the Borrowers may
         consolidate or merge into another Loan Party, (ii) the Loan Parties may
         acquire all or substantially all of the assets or all of the capital
         stock of other persons engaged in the same business as the business of
         the Loan Parties with the prior written consent of the Required Banks,
         such consent to be granted or withheld in their sole discretion, and
         (iii) Zaring Kentucky may sell all or substantially all of its assets
         pursuant to the terms of that certain Asset Purchase Agreement dated as
         of September 29, 2000 by and among Zaring Homes Kentucky, as seller,
         Olympia Homes, LLC as buyer, and Zaring Homes, as indemnitor (the
         "ASSET PURCHASE AGREEMENT").

                  B. Section 8.2(g) [Disposition of Assets or Subsidiaries] of
the Credit Agreement is hereby amended by deleting such section in its entirety
and inserting in lieu thereof the following:

                  (g) DISPOSITION OF ASSETS OR SUBSIDIARIES

                           Each of the Loan Parties shall not sell, convey,
         assign, lease, abandon or otherwise transfer or dispose of, voluntarily
         or involuntarily, any of its properties or assets, tangible or
         intangible (including but not limited to sale, assignment, discount or
         other disposition of accounts, contract rights, chattel paper,
         equipment or general intangibles, with or without recourse, or of
         capital stock, shares of beneficial interest or partnership interests
         of a Subsidiary), except:

                           (i) transactions involving the sale of land and
         building inventory in the ordinary course of business;

                           (ii) any sale, transfer, lease, abandonment or other
         disposition of assets in the ordinary course of business which are no
         longer necessary or required in the conduct of the Loan Party's
         business;

                           (iii) any sale, transfer or lease of assets in the
         ordinary course of business which are replaced by substitute assets
         acquired; and

                           (iv) the asset sales by Zaring Homes Kentucky and
         Zaring Homes described in (a) the Asset Purchase Agreement and (b) that
         certain Termination Agreement dated as of September 29, 2000 by and
         among Zaring Homes, Phillip W. Leigh and Martha R. Leigh (the
         "TERMINATION AGREEMENT" and, together with the Asset Purchase
         Agreement, collectively the "PURCHASE AGREEMENTS").

                                      -2-
<PAGE>   3

         3. CONDITIONS OF EFFECTIVENESS OF THIS FIRST AMENDMENT.

         The effectiveness of this First Amendment is expressly conditioned upon
satisfaction of each of the following conditions precedent:

         (a) REPRESENTATIONS AND WARRANTIES; NO DEFAULTS. The representations
and warranties of the Loan Parties contained in Section 6 of the Credit
Agreement shall be true and accurate on the date hereof with the same effect as
though such representations and warranties had been made on and as of such date
(except representations and warranties which relate solely to an earlier date or
time, which representations and warranties shall be true and correct on and as
of the specific dates or times referred to therein); the Loan Parties shall have
performed and complied with all covenants and conditions of the Credit
Agreement; and no Event of Default or Potential Default under the Credit
Agreement shall have occurred and be continuing or shall exist.

         (b) COUNTERPARTS OF FIRST AMENDMENT. The Agent shall have received
counterparts of this First Amendment duly executed by the Loan Parties and the
Banks. This First Amendment may be executed by the parties hereto in any number
of separate counterparts, each of which when taken together and duly executed
and delivered shall together constitute one and the same instrument.

         (c) SECRETARY'S CERTIFICATE. The Agent shall have received a
certificate signed by the Secretary or Assistant Secretary of Zaring National,
Zaring Homes and Zaring Homes Kentucky certifying as to all action taken by
Zaring National, Zaring Homes and Zaring Homes Kentucky to authorize the
execution, delivery and performance of the Asset Purchase Agreement and the
Termination Agreement and the documents executed in connection therewith.

         (d) CLOSING OF ASSET SALES. The Agent shall have received a fully
executed copy of the Purchase Agreements and the asset sales contemplated by the
Purchase Agreements shall be consummated substantially on the terms set forth in
the drafts of the Purchase Agreements previously provided to the Agent.

         (e) CASH PROCEEDS. All cash proceeds received by any of the Loan
Parties pursuant to the Asset Purchase Agreement shall immediately upon receipt
be applied, first, to prepay the Term Loans and, second, to prepay the Revolving
Credit Loans.

         (f) NOTES. Zaring Homes shall, immediately upon receipt, endorse the
Amenities Notes and the Inventory Note (both as defined in the Termination
Agreement and, collectively, the "NOTES") to the Agent, on behalf of the Banks,
and deliver the original Notes to the Agent, on behalf of the Banks, and assign
the Amenities Mortgage and the Inventory Mortgage to the Agent on behalf of the
Banks.

         4. FORCE AND EFFECT.

         Except as expressly modified by this Amendment, the Credit Agreement
and the other Loan Documents are hereby ratified and confirmed and shall remain
in full force and effect on and after the date hereof.

                                      -3-
<PAGE>   4

         5. GOVERNING LAW.

         This First Amendment shall be deemed to be a contract under the laws of
the State of Ohio and for all purposes shall be governed by and construed and
enforced in accordance with the internal laws of the State of Ohio without
regard to its conflict of laws principles.

         6. FEES AND EXPENSES.

         The Borrower hereby agrees to reimburse the Agent and the Banks on
demand for all fees, costs, expenses and disbursements (including without
limitation attorneys' fees) relating to this First Amendment which are payable
by the Loan Parties as previously agreed to by the Borrower and as provided in
Sections 10 and 11 of the Credit Agreement.

                            [SIGNATURE PAGES FOLLOW]

                                      -4-
<PAGE>   5

                [PAGE 1 OF 3 TO FIRST AMENDMENT TO THIRD AMENDED
                         AND RESTATED CREDIT AGREEMENT]

                               BORROWERS AND GUARANTORS:

                               ZARING HOMES, INC.

                               By:______________________________________________
                               Name:  Ronald G. Gratz
                               Title: Vice President and Chief Financial Officer

                               ZARING HOLDINGS, INC.

                               By:______________________________________________
                               Name: Ronald G. Gratz
                               Title: Treasurer

                               HEARTHSIDE HOMES, LLC
                                 By:  Zaring National Corporation, as member

                               By:______________________________________________
                               Name:  Ronald G. Gratz
                               Title: Secretary/Treasurer

                               ZARING NATIONAL LAND HOLDING CORPORATION

                               By:______________________________________________
                               Name:  Ronald G. Gratz
                               Title: Secretary/Treasurer

                               ZARING NATIONAL HOMES HOLDING CORPORATION

                               By:______________________________________________
                               Name:  Ronald G. Gratz
                               Title: Secretary/Treasurer

<PAGE>   6

           [SIGNATURE PAGE 2 OF 3 TO FIRST AMENDMENT TO THIRD AMENDED
                         AND RESTATED CREDIT AGREEMENT]

                             ZARING LEASING, LLC
                               By: Zaring National Corporation, as sole
                               member and manager

                             By:________________________________________________
                             Name:  Ronald G. Gratz
                             Title: Secretary/Treasurer

                             ZARING NATIONAL CORPORATION

                             By:________________________________________________
                             Name:  Ronald G. Gratz
                             Title: Secretary/Treasurer

                             ZARING HOMES OF INDIANA, L.L.C.
                               By: Zaring Homes, Inc., as member

                             By:________________________________________________
                             Name:  Ronald G. Gratz
                             Title: Vice President and Chief Financial Officer

                             ZARING HOMES KENTUCKY, LLC,
                             By: Zaring Holdings, Inc., as manager

                             By:________________________________________________
                             Name:  Ronald G. Gratz
                             Title: Treasurer

<PAGE>   7

           [SIGNATURE PAGE 3 OF 3 TO FIRST AMENDMENT TO THIRD AMENDED
                         AND RESTATED CREDIT AGREEMENT]

                              AGENT:

                              PNC BANK, NATIONAL ASSOCIATION,
                              as Agent and as a Bank

                              By:_______________________________________________
                              Name:  Thomas J. McCool
                              Title: Senior Vice President

                              CO-AGENTS:

                              BANK OF AMERICA, N.A., as a Co-Agent and as a Bank

                              By:_______________________________________________
                              Name:  Michelle Chen
                              Title: Vice President

                              BANK ONE, NA, as a Co-Agent and as a Bank

                              By:_______________________________________________
                              Name:  Thomas T. Bower
                              Title: First Vice President

                              OTHER BANKS:

                              COMERICA BANK,

                              By:_______________________________________________
                              Name:  John F. Regan
                              Title: Vice President

                              THE FIFTH THIRD BANK

                              By:_______________________________________________
                              Name: Brian L. Rogg
                              Title: Vice President<PAGE>   1

                                                                   Exhibit 10.31

                               SECOND AMENDMENT TO
                   THIRD AMENDED AND RESTATED CREDIT AGREEMENT

                  THIS SECOND AMENDMENT TO THIRD AMENDED AND RESTATED CREDIT
AGREEMENT (the "SECOND AMENDMENT") dated as of October 10, 2000 by and among
ZARING HOMES, INC. ("ZARING HOMES"), ZARING HOLDINGS, INC., HEARTHSIDE HOMES,
LLC, ZARING NATIONAL LAND HOLDING CORPORATION, ZARING NATIONAL HOMES HOLDING
CORPORATION, and ZARING LEASING, LLC, as Borrowers and Guarantors, ZARING
NATIONAL CORPORATION ("ZARING NATIONAL"), ZARING HOMES OF INDIANA, L.L.C. and
ZARING HOMES KENTUCKY, LLC ("ZARING HOMES KENTUCKY"), as Guarantors, the Banks
set forth below, BANK OF AMERICA, N.A. and BANK ONE, NA, as Co-Agents, and PNC
BANK, NATIONAL ASSOCIATION, in its capacity as Agent for the Banks (the
"AGENT").

                              W I T N E S S E T H:

                  WHEREAS, the Borrowers, the Guarantors, the Banks, the
Co-Agents and the Agent are parties to that certain Third Amended and Restated
Credit Agreement dated as of April 13, 2000, as amended by First Amendment to
Third Amended and Restated Credit Agreement (the "CREDIT AGREEMENT"); and

                  WHEREAS, the Borrowers and the Guarantors have requested that
certain covenants of the Credit Agreement be amended as set forth herein;

                  WHEREAS, the Banks are willing to enter into such amendments
on the terms and subject to the conditions set forth herein.

                  NOW, THEREFORE, the parties hereto, in consideration of their
mutual covenants and agreements hereinafter set forth and intending to be
legally bound hereby, covenant and agree as follows:

         1. DEFINITIONS.

         Defined terms used herein and not otherwise defined herein shall have
the meanings given to them in the Credit Agreement, as amended by this Second
Amendment.

         2. AMENDMENT OF CREDIT AGREEMENT.

                  A. The first sentence of Section 2.4(a) [Mandatory Reductions]
of the Credit Agreement is hereby deleted and the following is inserted in lieu
thereof:

                           The Revolving Credit Commitment shall be permanently
         reduced on July 1, 2000 to $67,500,000, on October 1, 2000 to
         $62,500,000 and on the date of the closing of the Raleigh Purchase
         Agreement (as defined herein) to

<PAGE>   2

         $52,500,000, and each Bank's Revolving Credit Commitment shall be
         reduced in accordance with its Ratable Share on such dates.

                  B. A new Section 8.1(n) [Certain Letters of Credit] of the
Credit Agreement is hereby inserted immediately following Section 8.1(m) as
follows:

                  (n) CERTAIN LETTERS OF CREDIT

                           On or before December 31, 2000, the Loan Parties
         shall cause all Letters of Credit issued with respect to the assets
         that have been sold pursuant to the Louisville Purchase Agreements and
         the Raleigh Purchase Agreement to be cancelled, replaced or fully cash
         collateralized.

                  C. Section 8.2(g) [Disposition of Assets or Subsidiaries] of
the Credit Agreement is hereby amended by deleting such section in its entirety
and inserting in lieu thereof the following:

                  (g) DISPOSITION OF ASSETS OR SUBSIDIARIES

                           Each of the Loan Parties shall not sell, convey,
         assign, lease, abandon or otherwise transfer or dispose of, voluntarily
         or involuntarily, any of its properties or assets, tangible or
         intangible (including but not limited to sale, assignment, discount or
         other disposition of accounts, contract rights, chattel paper,
         equipment or general intangibles, with or without recourse, or of
         capital stock, shares of beneficial interest or partnership interests
         of a Subsidiary), except:

                           (i) transactions involving the sale of land and
         building inventory in the ordinary course of business;

                           (ii) any sale, transfer, lease, abandonment or other
         disposition of assets in the ordinary course of business which are no
         longer necessary or required in the conduct of the Loan Party's
         business;

                           (iii) any sale, transfer or lease of assets in the
         ordinary course of business which are replaced by substitute assets
         acquired;

                           (iv) the asset sales by Zaring Homes Kentucky and
         Zaring Homes described in (a) the Asset Purchase Agreement and (b) that
         certain Termination Agreement dated as of September 29, 2000 by and
         among Zaring Homes, Phillip W. Leigh and Martha R. Leigh (the
         "TERMINATION AGREEMENT" and, together with the Asset Purchase Agreement
         dated as of September 29, 2000 by and among Zaring Homes Kentucky, as
         seller, Olympia Homes, LLC, as buyer, and Zaring Homes, as indemnitor,
         collectively the "LOUISVILLE PURCHASE AGREEMENTS"); and

                           (v) the asset sales by Zaring Homes described in (a)
         the Asset Purchase Agreement dated on or about October 10, 2000 by and
         between Zaring National and Zaring Homes, as sellers, and the Drees
         Company, as purchaser

                                      -2-
<PAGE>   3

         (the "RALEIGH PURCHASE AGREEMENT") and (b) the Bill of Sale dated as of
         September 30, 2000 by MacroDyne Power, LLC, as buyer, and Zaring Homes,
         Inc., as seller ("BILL OF SALE").

         3. CONDITIONS OF EFFECTIVENESS OF THIS SECOND AMENDMENT.

         The effectiveness of this Second Amendment is expressly conditioned
upon satisfaction of each of the following conditions precedent:

         (a) REPRESENTATIONS AND WARRANTIES; NO DEFAULTS. The representations
and warranties of the Loan Parties contained in Section 6 of the Credit
Agreement shall be true and accurate on the date hereof with the same effect as
though such representations and warranties had been made on and as of such date
(except representations and warranties which relate solely to an earlier date or
time, which representations and warranties shall be true and correct on and as
of the specific dates or times referred to therein); the Loan Parties shall have
performed and complied with all covenants and conditions of the Credit
Agreement; and, except for the violation of Section 8.2(a) [Zaring National Net
Worth] measured at September 30, 2000, resulting from Shareholder Subordinated
Debt not being included in the calculation of Zaring National Net Worth for the
fiscal quarter ending September 30, 2000, no Event of Default or Potential
Default under the Credit Agreement shall have occurred and be continuing or
shall exist.

         (b) COUNTERPARTS OF SECOND AMENDMENT. The Agent shall have received
counterparts of this Second Amendment duly executed by the Loan Parties and the
Banks. This Second Amendment may be executed by the parties hereto in any number
of separate counterparts, each of which when taken together and duly executed
and delivered shall together constitute one and the same instrument.

         (c) SECRETARY'S CERTIFICATE. The Agent shall have received a
certificate signed by the Secretary or Assistant Secretary of Zaring Homes to
authorize the execution, delivery and performance of the Raleigh Purchase
Agreement and the documents executed in connection therewith.

         (d) CLOSING OF ASSET SALES. The Agent shall have received a fully
executed copy of the Raleigh Purchase Agreement and the Bill of Sale and the
asset sales contemplated by the Raleigh Purchase Agreement and the Bill of Sale
shall be consummated substantially on the terms set forth in the drafts of the
Raleigh Purchase Agreement and the Bill of Sale previously provided to the
Agent.

         (e) CASH PROCEEDS. All cash proceeds received by Zaring Homes and
Zaring National pursuant to the Raleigh Purchase Agreement and the Bill of Sale
shall immediately upon receipt be applied to prepay the Revolving Credit Loans.

                                      -3-
<PAGE>   4

         4. FORCE AND EFFECT.

         Except as expressly modified by this Amendment, the Credit Agreement
and the other Loan Documents are hereby ratified and confirmed and shall remain
in full force and effect on and after the date hereof.

         5. GOVERNING LAW.

         This Second Amendment shall be deemed to be a contract under the laws
of the State of Ohio and for all purposes shall be governed by and construed and
enforced in accordance with the internal laws of the State of Ohio without
regard to its conflict of laws principles.

         6. FEES AND EXPENSES.

         The Borrower hereby agrees to reimburse the Agent and the Banks on
demand for all fees, costs, expenses and disbursements (including without
limitation attorneys' fees) relating to this Second Amendment which are payable
by the Loan Parties as previously agreed to by the Borrower and as provided in
Sections 10 and 11 of the Credit Agreement.

                            [SIGNATURE PAGES FOLLOW]

                                      -4-
<PAGE>   5

                [PAGE 1 OF 3 TO SECOND AMENDMENT TO THIRD AMENDED
                         AND RESTATED CREDIT AGREEMENT]

                              BORROWERS AND GUARANTORS:

                              ZARING HOMES, INC.

                              By:_______________________________________________
                              Name:  Ronald G. Gratz
                              Title: Vice President and Chief Financial Officer

                              ZARING HOLDINGS, INC.

                              By:_______________________________________________
                              Name:  Ronald G. Gratz
                              Title: Treasurer

                              HEARTHSIDE HOMES, LLC
                                By: Zaring National Corporation, as member

                              By:_______________________________________________
                              Name:  Ronald G. Gratz
                              Title: Secretary/Treasurer

                              ZARING NATIONAL LAND HOLDING CORPORATION

                              By:_______________________________________________
                              Name:  Ronald G. Gratz
                              Title: Secretary/Treasurer

                              ZARING NATIONAL HOMES HOLDING CORPORATION

                              By:_______________________________________________
                              Name:  Ronald G. Gratz
                              Title: Secretary/Treasurer

<PAGE>   6

           [SIGNATURE PAGE 2 OF 3 TO SECOND AMENDMENT TO THIRD AMENDED
                         AND RESTATED CREDIT AGREEMENT]

                              ZARING LEASING, LLC
                                By: Zaring National Corporation, as sole
                                member and manager

                              By:_______________________________________________
                              Name:  Ronald G. Gratz
                              Title: Secretary/Treasurer

                              ZARING NATIONAL CORPORATION

                              By:_______________________________________________
                              Name:  Ronald G. Gratz
                              Title: Secretary/Treasurer

                              ZARING HOMES OF INDIANA, L.L.C.
                                By: Zaring Homes, Inc., as member

                              By:_______________________________________________
                              Name:  Ronald G. Gratz
                              Title: Vice President and Chief Financial Officer

                              ZARING HOMES KENTUCKY, LLC,
                              By: Zaring Holdings, Inc., as manager

                              By:_______________________________________________
                              Name: Ronald G. Gratz
                              Title: Treasurer

<PAGE>   7

           [SIGNATURE PAGE 3 OF 3 TO SECOND AMENDMENT TO THIRD AMENDED
                         AND RESTATED CREDIT AGREEMENT]

                              AGENT:

                              PNC BANK, NATIONAL ASSOCIATION,
                              as Agent and as a Bank

                              By:_______________________________________________
                              Name:  Thomas J. McCool
                              Title: Senior Vice President

                              CO-AGENTS:

                              BANK OF AMERICA, N.A., as a Co-Agent and as a Bank

                              By:_______________________________________________
                              Name:  Michelle Chen
                              Title: Vice President

                              BANK ONE, NA, as a Co-Agent and as a Bank

                              By:_______________________________________________
                              Name:  Thomas T. Bower
                              Title: First Vice President

                              OTHER BANKS:

                              COMERICA BANK,

                              By:_______________________________________________
                              Name:  John F. Regan
                              Title: Vice President

                              THE FIFTH THIRD BANK

                              By:_______________________________________________
                              Name: Brian L. Rogg
                              Title: Vice President

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