Abstract:
Components for a multiple window unit sunroof are pre-assembled at the factory and include a support frame having vertical beam members which have water weep channels on their top faces for routing away from the sunroof moisture entering under the glazing panel adjacent side edges which overlap the drain channel. The support frame is snugly received in a boot. Removable locator jigs are attached to the perimeter frame of the glazing panels to position them and hold them while mounting flanges are being installed.

Description:
CROSS REFERENCE TO A RELATED APPLICATION 
     This application is a continuation-in-part of application Ser. No. 07/342,094 filed Apr. 24, 1989 now U.S. Pat. No. 5,007,215 by Mearl Minter and entitled SUNROOM. 
    
    
     BACKGROUND OF THE INVENTION 
     A sunroof which is of a sunroom is a very popular building feature. A skylight as disclosed in the Mearl Minter U.S. Pat. No. 4,972,638 utilizes a single glazing panel. What is needed is a sunroof utilizing glazing panels interconnected as disclosed in Mearl Minter U.S. Pat. No. 5,007,215 Apr. 16, 1991 assigned to Pella Corporation, Pella, Iowa. It is desirable to factory assemble as much of the sunroof as possible leaving a minimum amount of assembly for the job site. A sunroof assembly at the job site should be &#34;installer friendly&#34;. The sunroof should include as many as four glazing panels and involve a composite frame readily mounted in a roof opening. A built-in water weep system should be provided. Installation jigs are desirable for assuring that the glazing panels are properly positioned on the supporting composite frame. The frame should be mounted in a protective boot. 
     SUMMARY OF THE INVENTION 
     Components for a leakproof sunroof including up to four glazing panels are assembled requiring a minimum of time and effort on the part of the installer at the job site. The individual frame and glazing panel components are packaged and shipped separately thereby reducing the weight of the largest item allowing for one person handling. 
     A factory assembled composite frame is provided on which the multiple glazing panels are secured after the frame has been placed in the roof opening. The glazing panels are accurately and quickly positioned on the frame through use of locator jigs along the top and outside edges. The locator jigs are removed after mounting flanges are screwed in place along the bottom side followed by mounting flanges being screwed in place around the remainder of the exterior periphery. A clip has legs received in channels of adjacent glazing panels to assure a proper predetermined spacing therebetween and to secure the panels to the support frame. A mullion width of up to three inches is possible. 
     The support frame is protected by a factory installed tight fitting boot which covers its entire exterior surface and includes a flange that extends down over the roof which in turn is taped to the roof along its exterior peripheral edge. Below adjacent glazing panel side edges is a vertical frame member in the support frame which includes a water weep channel covered with water resistant plastic. At the lower end of the channel the tape extends downwardly over the boot and is sealed with silicone sealant. The glazing panels include an exterior perimeter frame having oppositely facing twin channels. The horizontal top and bottom twin channels empty any water therein into the vertical frame channel. Any condensation will also be routed away from the window assembly. 
    
    
     DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a fragmentary perspective view of the sunroof in the roof of a building. 
     FIG. 2 is an exploded perspective view of the component parts for the sunroof. 
     FIG. 3 is a fragmentary cross-sectional exploded figure illustrating the component parts. 
     FIG. 4 is a fragmentary enlarged detail view of the upper end of the sunroof as indicated by the line 4--4 in FIG. 1. 
     FIG. 5 is a cross-sectional view taken along line 5--5 in FIG. 4 illustrating the clip for connecting and spacing the glazing panels and securing them to the support frame. 
     FIG. 6 is a fragmentary cross-sectional view taken along line 6--6 in FIG. 4 illustrating the use of the locator jig for positioning the glazing panels on the support frame during installation. 
     FIG. 7 is an enlarged detail fragmentary perspective view of the lower end of the sunroof as indicated by the lines 7--7 in FIG. 1. 
     FIG. 8 is a fragmentary cross-sectional view taken along line 8--8 in FIG. 1. 
     FIG. 9 is a fragmentary cross-sectional view taken along line 9--9 in FIG. 1. 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENT 
     The sunroof of this invention is referred to generally in FIG. 1 by the reference numeral 10 and is shown mounted in a roof 12 having an opening 14 as seen in FIG. 2. 
     The sunroof 10 includes a composite one-piece support frame 16 sized to support four glazing panels 18. An EPDM boot membrane flashing 20 substantially covers the support frame 16. 
     The support frame 16 includes top and bottom frame members 22 and 24 and opposite side frame members 26 and 28. Support frame members 30, 32 and 34 extend between the top and bottom frame members 22 and 24 and include in the top surface a drain channel 36. The channel 36 is protected from moisture by a waterproof membrane 38 as seen in FIG. 7 which includes a flap 40 extending downwardly over the boot 20 and adhesively secured thereto by silicone sealant 42. The boot is cutaway under the flap 40 to allow free flow of water from the channel 36. 
     The support frame 16 is positioned in the opening 14 of the roof 12 and secured to the roof 12 by mounting brackets 44 received in a notch 46 in the frame 16 and held by screws 48. The bracket 44 is then secured to the roof 12 by screws 50. 
     The boot 20 includes a horizontal portion 52 merging into a vertical portion 54 in turn merging into a horizontal portion 56 extending over the top edge of the support frame 16. Three upstanding ribs 58 are provided on the portion 56 to receive silicone sealant 60 as seen in FIGS. 7 and 8 to provide a seal with the glazing panel 18. 
     The support frame members 30, 32 and 34 which give the appearance of beams from the room side are used in Rolscreen Company sunrooms as disclosed in the Mearl Minter U.S. Pat. No. 5,007,215 as seen in FIG. 9. The beam 32 is of laminated wood and includes the upwardly facing channel 36 on its top side. The channel has sidewalls 62 and a base 64. The base 64 includes an upstanding center ridge 66 of wood which spaces apart a pair of steel plates 68 which strengthen the beams and balance them against a strengthening plate 70 on the bottom side held by screws 72. 
     The glazing panels 18 include a peripheral frame 74 having a pair of upwardly facing channels 76 and 78 and downwardly facing channels 80 and 82 as seen in FIG. 5. The horizontal channels 76 and 78 as seen in FIG. 8 have multiple functions including serving as drain channels which empty into the channels 36 as seen, for example, along the lower edge of the glazing panels in FIG. 7. Drainage occurs at the top of the panels 18 in a similar manner. 
     The assembly of the glazing panels 18 to the support frame 16 involves utilizing a locator jig 84 along the top and exterior side edges as seen in FIG. 4. The locator jigs 84 include oppositely extending legs 86 and 88 received in the oppositely facing channels 78 and 82. The jig is adapted to be slid onto the glazing panel exterior frame from any corner as seen in FIG. 4. A downwardly extending leg 90 extends toward the support frame 16 and contacts it at the juncture 92 with an outwardly extending portion 94. It is seen that the locator jigs 84 hold the glazing panel 18 from sliding down the roof and accurately position it on the support frame 16. 
     A sill mounting flange 96 is then screwed to the bottom support frame 24 and engages the bottom glazing panel frame. The mounting flanges 96 as seen in FIG. 7 terminate at drain channels 36. A side mounting flange 98 is then installed followed by removal of the locator jigs 84 and installation of the head mounting flange 100 upon all of the glazing panels 18 having been installed. The glazing panels 18 are spaced a predetermined distance apart as determined by a connecting clip 102 as seen in FIG. 5 which has downwardly extending legs received in the upwardly facing channel 76 of the glazing panel perimeter frame. A screw 104 extending through the clip 102 secures the glazing panels 18 to the beam 34. 
     The next step involves adding the counter flashing 114 along the exterior sides, 116 along the top, and 118 along the bottom. As seen in FIG. 8, the counter flashing 116 includes a top horizontal portion 120 having a foam seal 122 engaging a top face of the glazing panel 18 and a downwardly extending leg 124 extends into the channel 78 of the glazing panel perimeter frame. The remainder of the flashing extends downwardly and outwardly toward the roof 12 and includes an adjustable portion 126 which may be positioned as desired by operation of an adjustment screw 128. The other flashing pieces are attached in a similar fashion although do not have the adjustment feature. 
     A mullion cover 106 having foam seals 108 sealingly engage the top face of the glazing panels 18 as seen in FIG. 9. A screw 110 secures the cover 106 to the support frame member 32 and is in turn covered by a mullion strip 112. 
     As also seen in FIG. 8, a condensation trough 130 is mounted on the bottom support frame member 24 at the lower end of the glazing panels 18. Waterproof tape 132 covers the outer horizontal flange 52 of the boot 20 securing it to the roof 12. 
     It is thus seen that through use of a composite factory assembled multiple window unit support frame 16 up to four glazing panels 18 may be mounted in a roof opening 14. Size and weight are the only limitations. A chance of misassembly is minimized by all component parts required for the sunroof installation being provided ready to be used without further fabrication being required. The sunroof is positively sealed against leakage through use of the protective boot 20 and the beam drain channels 36 between and under the adjacent edges of each pair of glazing panels 18. The use of the locator jigs 84 assures that the glazing panels are accurately positioned on the support frame and held there while the mounting flanges are installed.