EXHIBIT 3.17

                            CERTIFICATE OF FORMATION
                                       OF
                   BUILDERS FIRSTSOURCE - COLORADO GROUP, LLC

      This Certificate of Formation of Builders FirstSource - Colorado Group,
LLC (the "Company"), dated as of the 23rd day of December, 2003, is being duly
executed and filed by the undersigned, as an authorized person, to form a
limited liability company under the Delaware Limited Liability Company Act (6
Del.C. Section 18-101, et seq.).

      1.    The name of the limited liability company formed hereby is Builders
            FirstSource - Colorado Group, LLC.

      2.    The address of the registered office of the Company in the State of
            Delaware is 1209 Orange Street, Wilmington, Delaware 19801.

      3.    The name and address of the registered agent for service of process
            on the Company in the State of Delaware is The Corporation Trust
            Company, 1209 Orange Street, Wilmington, Delaware 19801.

      4.    The future effective date and time of formation of the Company is
            11:59 p.m. on December 31, 2003.

      IN WITNESS WHEREOF, the undersigned has executed this Certificate of
Formation as of the date first above written.

                                          By: /s/ Jeffrey A. Wier
                                              -------------------
                                              Jeffrey A. Wier,
                                              Authorized Person

                                                               State of Delaware
                                                              Secretary of State
                                                        Division of Corporations
                                                   Delivered 08:00 PM 12/23/2003
                                                       FILED 07:15 PM 12/23/2003
                                                    SRV 030833301 - 3744620 FILE