two sided adhesive tapes 81 82 as shown in fig4 according to the present invention a discrepancy in the tolerance of the outer wall panels 11 14 or the weatherstrip 67 does not greatly affect the sealing ability of the weatherstrip 67 because the sealing band 70 is easily transformed in accordance with the shape of the outer wall panels 11 14 or the weathestrip 67 furthermore the present invention has another advantage as shown in fig3 there is a discontinuous portion 15 around the corner of the window frame 40 where the rear waist panels 11 21 and the rear side panels 13 23 are joined according to the prior art which uses the sealant as mentioned before the discontinuous portion 15 needs soldering and grinding which require a lot of time and cost to obtain the flat and continuous surface for secure sealing however according to the present invention the discontinuous portion 15 may be left without soldering and grinding because the sealing band 70 and the adhesive tape 81 are transformed in accordance with the shape of the discontinuous portion 15 and securely seal the space between the weatherstrip 67 and the outer wall panels 11 14 fig7 and 8 illustrate.