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                                                                   Exhibit 10.29

                       AMENDMENT TO EMPLOYMENT AGREEMENT
                       ---------------------------------
                    BETWEEN LYDALL, INC. AND MARY TREMBLAY
                    --------------------------------------
                              Dated March 1, 2000
                              -------------------

     This is an Amendment of the Employment Agreement between Lydall, Inc. and
Mary Tremblay dated March 1, 2000. This Amendment is made in consideration of
the mutual agreements and promises hereinafter set forth and for other good and
valuable consideration.

     All provisions of the Employment Agreement are reaffirmed and will remain
in full force and effect except that the following new sections shall be added
as noted:

     3.5 Automobile. During the Employment Period, the Company will provide the
         ----------
     Executive with an automobile in accordance with Company policy.

                                      and

     9.   Benefits Upon Termination Without Cause or For Good Reason (Change of
          ---------------------------------------------------------------------
          Control).
          ---------

               (h)  The Company will pay the Executive a car allowance, in an
          amount equal to Executive's monthly lease allowance at the time of
          termination, per month for 24 months following termination of the
          Executive's employment to replace the Company-leased automobile, which
          leased automobile will be returned to the Company by the Executive on
          the date of termination of the Executive's employment.

     This amendment will be effective as of August 1, 2000.

               IN WITNESS WHEREOF, Lydall, Inc. and Mary Tremblay have caused
this Amendment to the Agreement to be executed in duplicate.

LYDALL, INC.

By
   ----------------------                            ---------------------
        Walter A. Ruschmeyer                         Mary Tremblay
         Executive Vice President -
            Finance and Administration,
         Chief Financial Officer<PAGE>

                                                                   Exhibit 10.30

                       AMENDMENT TO EMPLOYMENT AGREEMENT
                       ---------------------------------
               BETWEEN LYDALL, INC. AND CHRISTOPHER SKOMOROWSKI
               ------------------------------------------------
                              Dated March 1, 2000
                              -------------------

     This is an Amendment of the Employment Agreement between Lydall, Inc. and
Christopher Skomorowski dated March 1, 2000. This Amendment is made in
consideration of the mutual agreements and promises hereinafter set forth and
for other good and valuable consideration.

     All provisions of the Employment Agreement are reaffirmed and will remain
in full force and effect except that the following new section shall be added as
noted:

     9.   Benefits Upon Termination Without Cause or For Good Reason (Change of
          ---------------------------------------------------------------------
          Control).
          ---------

               (h)  The Company will pay the Executive a car allowance, in an
          amount equal to Executive's monthly lease allowance at the time of
          termination, per month for 24 months following termination of the
          Executive's employment to replace the Company-leased automobile, which
          leased automobile will be returned to the Company by the Executive on
          the date of termination of the Executive's employment.

     This amendment will be effective as of August 1, 2000.

               IN WITNESS WHEREOF, Lydall, Inc. and Christopher Skomorowski have
caused this Amendment to the Agreement to be executed in duplicate.

LYDALL, INC.

By
   ----------------------                            ---------------------
        Roger M. Widmann                             Christopher Skomorowski
         Chairman of the Board<PAGE>

                                                                   Exhibit 10.31

                       AMENDMENT TO EMPLOYMENT AGREEMENT
                       ---------------------------------
                  BETWEEN LYDALL, INC. AND WALTER RUSCHMEYER
                  ------------------------------------------
                              Dated March 1, 2000
                              -------------------

     This is an Amendment of the Employment Agreement between Lydall, Inc. and
Walter Ruschmeyer dated March 1, 2000. This Amendment is made in consideration
of the mutual agreements and promises hereinafter set forth and for other good
and valuable consideration.

     All provisions of the Employment Agreement are reaffirmed and will remain
in full force and effect except that the following new section shall be added as
noted:

     9.   Benefits Upon Termination Without Cause or For Good Reason (Change of
          ---------------------------------------------------------------------
          Control).
          ---------

               (h)  The Company will pay the Executive a car allowance, in an
          amount equal to Executive's monthly lease allowance at the time of
          termination, per month for 24 months following termination of the
          Executive's employment to replace the Company-leased automobile, which
          leased automobile will be returned to the Company by the Executive on
          the date of termination of the Executive's employment.

     This amendment will be effective as of August 1, 2000.

               IN WITNESS WHEREOF, Lydall, Inc. and Walter Ruschmeyer have
caused this Amendment to the Agreement to be executed in duplicate.

LYDALL, INC.

By
   ----------------------                            ---------------------
        Christopher Skomorowski                      Walter Ruschmeyer
         President and Chief Executive Officer<PAGE>

                                                                   Exhibit 10.32

                       AMENDMENT TO EMPLOYMENT AGREEMENT
                       ---------------------------------
                    BETWEEN LYDALL, INC. AND JAMES CAROLAN
                    --------------------------------------
                              Dated March 1, 2000
                              -------------------

     This is an Amendment of the Employment Agreement between Lydall, Inc. and
James Carolan dated March 1, 2000. This Amendment is made in consideration of
the mutual agreements and promises hereinafter set forth and for other good and
valuable consideration.

     All provisions of the Employment Agreement are reaffirmed and will remain
in full force and effect except that the following new section shall be added as
noted:

     9.   Benefits Upon Termination Without Cause or For Good Reason (Change of
          ---------------------------------------------------------------------
          Control).
          ---------

               (h)  The Company will pay the Executive a car allowance, in an
          amount equal to Executive's monthly lease allowance at the time of
          termination, per month for 24 months following termination of the
          Executive's employment to replace the Company-leased automobile, which
          leased automobile will be returned to the Company by the Executive on
          the date of termination of the Executive's employment.

     This amendment will be effective as of August 1, 2000.

               IN WITNESS WHEREOF, Lydall, Inc. and James Carolan have caused
this Amendment to the Agreement to be executed in duplicate.

LYDALL, INC.

By
   ----------------------                            ---------------------
        Walter A. Ruschmeyer                         James Carolan
         Executive Vice President -
            Finance and Administration,
            Chief Financial Officer<PAGE>

                                                                   Exhibit 10.33

                       AMENDMENT TO EMPLOYMENT AGREEMENT
                       ---------------------------------
                     BETWEEN LYDALL, INC. AND KEVIN LYNCH
                     ------------------------------------
                              Dated March 1, 2000
                              -------------------

     This is an Amendment of the Employment Agreement between Lydall, Inc. and
Kevin Lynch dated March 1, 2000. This Amendment is made in consideration of the
mutual agreements and promises hereinafter set forth and for other good and
valuable consideration.

     All provisions of the Employment Agreement are reaffirmed and will remain
in full force and effect except that the following new section shall be added as
noted:

     9.   Benefits Upon Termination Without Cause or For Good Reason (Change of
          ---------------------------------------------------------------------
          Control).
          ---------

               (h)  The Company will pay the Executive a car allowance, in an
          amount equal to Executive's monthly lease allowance at the time of
          termination, per month for 24 months following termination of the
          Executive's employment to replace the Company-leased automobile, which
          leased automobile will be returned to the Company by the Executive on
          the date of termination of the Executive's employment.

     This amendment will be effective as of August 1, 2000.

               IN WITNESS WHEREOF, Lydall, Inc. and Kevin Lynch have caused this
Amendment to the Agreement to be executed in duplicate.

LYDALL, INC.

By
   ----------------------                            ---------------------
        Walter A. Ruschmeyer                         Kevin Lynch
         Executive Vice President -
            Finance and Administration,
            Chief Financial Officer

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