Tue, 19 Dec 2023 08:36:59 +0000 http://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17761&Focus=300519#Comment_300519 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17761&Focus=300519#Comment_300519 Tue, 28 Feb 2023 21:08:08 +0000 chrisinbrighton Ive been looking to get salvaged slates for a reroofing project.
Having done some research,it seems the best welsh slates last 130 years after which moisture gets absorbed and frost damage then starts.
Considering most buildings probably get demolished and salvaged after about 140 years doesnt that mean most salvaged slates have a very low shelf life?
Another thought,could something like stormdry stone sealer help prolong slate life?]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17761&Focus=300520#Comment_300520 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17761&Focus=300520#Comment_300520 Tue, 28 Feb 2023 21:21:51 +0000 tony
I have seen Welsh slates that are over 200 years old still going strong. Difficulty will be establishing that they really are Welsh.]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17761&Focus=300529#Comment_300529 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17761&Focus=300529#Comment_300529 Wed, 01 Mar 2023 09:08:19 +0000 Artiglio
But - even welsh slate is very variable from quarry to quarry. Throw is variances in exposure, pollution and manner and construction of the roof they were on and there are no hard and fast rules. I’ve redone an oast roof on which the slates were likely a mix of reclaims when it was done in 1907 ( only one set of holes in the original sarking board, but some slates had 3 lots of holes). Some were rotten and friable, others resembled wet hardboard, about half were reused again.

I got the replacements from a dealer near Dartford, threw very few of what i was sent away.
Nice chap, worth having a chat with him
http://dtslatebuyers.co.uk/

You can get new welsh slate but the advertised prices are eye watering.]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17761&Focus=300534#Comment_300534 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17761&Focus=300534#Comment_300534 Wed, 01 Mar 2023 10:37:25 +0000 revor Posted By: ArtiglioMy mum has a welsh barn , built in 1802 one face of the roof is in the original slates ( locally called “welsh cows”, as they are variable in size , so batten spacing reduces as you move up the roof, takes ages to lay them) reclaimed when the barn was renovated, they’re as hard and solid as day they were first split. Probably last forever.

Usually called random diminishing.

When we did our extension/refurb we took off the front elevation of random diminishing slates numbering them in rows and position with hope of reusing them but we would not have enough and trying to match would have been costly. We resorted to new welsh slate. They must have been old they had been re-fixed with nails but original wood pegs were still evident in some. Property we think was from about 1750. I still have them in storage the biggest slate is about 4' x 3' we have outbuildings we may be able to use them on, So basically you should not be concerned about Welsh slate they last several lifetimes. An experienced slater will be able to tell you if they are welsh and also from what quarry they came from. Make sure what you get are thick around 8mm which is about medium thickness in grade they will taper slightly along their length and good slaters will grade into 3 or so thickness stacks the thicker slates on the first rows working up the roof. When handling the slate they will balance it in their hand so as to put the thinnest edge at the top so that when all laid the roof looks very even.]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17761&Focus=300543#Comment_300543 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17761&Focus=300543#Comment_300543 Wed, 01 Mar 2023 17:33:18 +0000 Artiglio http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17761&Focus=300547#Comment_300547 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17761&Focus=300547#Comment_300547 Wed, 01 Mar 2023 21:08:30 +0000 jamesingram http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17761&Focus=300590#Comment_300590 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17761&Focus=300590#Comment_300590 Sat, 04 Mar 2023 12:34:49 +0000 tony http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17761&Focus=300615#Comment_300615 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17761&Focus=300615#Comment_300615 Sun, 05 Mar 2023 20:13:48 +0000 chrisinbrighton http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17761&Focus=300618#Comment_300618 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17761&Focus=300618#Comment_300618 Mon, 06 Mar 2023 12:01:32 +0000 tony http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17761&Focus=300627#Comment_300627 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17761&Focus=300627#Comment_300627 Mon, 06 Mar 2023 19:55:17 +0000 Nick Parsons http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17761&Focus=300636#Comment_300636 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=17761&Focus=300636#Comment_300636 Tue, 07 Mar 2023 11:23:22 +0000 revor