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2018-06-24

パミール屋根とは?

皆さんは「パミール屋根」という言葉を聞いたことがあるでしょうか?
この屋根は元々ニチハという企業が1996年~2009年に発売していた化粧スレート系の無石綿屋根材です。
無石綿ということもあり、アスベストが配合されていないことから当時注目され、多くの工務店やハウスメーカーでも使われていました。
スレート屋根に使われるアスベストは繊維状になっていてスレートが踏み割れしないように配合されていましたが、発がん性物質として問題となり、パミールができたと言われています。

パミールではアスベストの代わりにパルプ繊維などが配合され、踏み割れを防止しています。
しかし、パルプ繊維を使ったことで吸水性が高まり、結果として早い劣化につながってしまったのです。

パミール屋根事例

 

放置しておくとどうなる?

パミール屋根を放置していると、様々な症状が出てきます。
最初に見られる症状が、先端部分が浮き上がってきてしまうことです。
この状態だとただの経年劣化だから仕方ないと考えてしまうかもしれませんが、屋根材が浮き上がってしまうということは剥がれやすくなるということにもつながります。
パミールが浮き上がったところに雨が降れば雨漏りにつながる可能性も高いです。
また、屋根材が浮き上がったら次に強風が吹いた時に、パミールが剥がれて外を歩いている人に直撃してしまう可能性も否定できません。

もう一つ、放置しておくと見られる症状に層状剥離というものがあります。
層状剥離では、日射や温度差によって剥がれ具合は異なり、南や西、東だと表面がボロボロと細かく剥がれていってしまいます。
北の場合は湿気が多いためか劣化も進みやすく、大きな剥がれを生み出しています。
放置してしまうと、このように様々な症状に見舞われてしまうのです。
そのため、パミール屋根はそのまま放置しないようにメンテナンス、もしくは修理や葺き替えを実施するべきと言えるでしょう。

パミール屋根はアスベストの代わりにパルプ繊維を使ったことで、劣化の進行スピードが早くなります。
修理やメンテナンスは放置せず、早めに実施するようにしましょう。

 

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