Pu edge kashe ya ubwoya / ikirahuri ubwoya bwa sandwich ikozwe mubice bibiri byamabara meza yo mu rwego rwohejuru yometseho icyuma cyangwa ikindi cyapa cyanditseho neza, kandi ibikoresho byibanze ni rockwool / ibirahuri, Nyuma yo kuzunguruka, rockwool / ibirahuri nyuma yo gutemba bihinduka Dogere 90 (gukora fibre yayo ihagaritse hejuru yicyuma cyo hejuru no hepfo), Ubwoya bwo murwego rwohejuru / ubwoya bwikirahure buhujwe cyane nicyuma binyuze mumbaraga nyinshi, gufatana hejuru hamwe no gufunga umuriro mwinshi, kandi polyurethane ikoreshwa mugushiraho ikimenyetso impande kumpande zombi kugirango zibe icyapa cyiza, kiringaniye, gikomeye kandi gikomeye.