How to repair sandstone sills and mullions interior built in 1629
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- เผยแพร่เมื่อ 26 ส.ค. 2024
- How to repair sandstone sills- (cills) and mullions windows interior built in 1629.
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I thought sandstone repairs had to be done with lime mortar?????
Your right should never be done with cement
Thomas Kevin Murtagh is correct, you seem very skilled with your hands. I would recommend taking a conservation course though, as this type of repair with any level of cement is inapropriate, inside or out. For historical structures such as this I would recommend engaging or seeking the advice of a heritage professional before carrying out any kind of repair. English heritage also produce a great series of practical publications which I highly recommend (see, Practical Building Conservation: Stone). Organisations such as SPAB, or the 'building limes forum' would be able to point you in the right direction ref courses. You've clearly got the hand skills, I hope that you can put them to use to help save our historic buildings, and help other people learn best practice through here. Best of luck!
You may be correct for exterior mortar joints and rendering near stonework. But this work shown in the video is internal which makes a difference. Have read a lot on this subject and it seems this problem only occurs outside.
Mainly on mortar, it's not anything chemical more to do with weathering the mortar now is a lot more hard so weathers slower than the stone. But it must be having a dramatic effect on how the wind rain and frost affect the stone at the edges near the mortar.
If either side of the wall is not able to breathe it will be effecting the function of the wall by causing problems with the egress of water, the transmission of salts (chemical reations) at and around the interstices. It appears from your images that the (what appears to be) non breathable interior finish shows some bubbling, and this finish may be what has caused, or exacerbated the decay of the stone. Obviously a site visit from a conservation professsional would be appropriate to further determine this. There is a lot of out of date literature out there and your comments suggest that there are some gaps in your understanding. So I would suggest getting up to date or getting in touch with some of the organisations that I mentioned above, as you are clearly keen to do a proper job. In our professions we are always learning, and we should all help each other to develop our skills, especially as our understanding of the materials and their conservation is developing so quickly.
I trust my experience 100% so do my customers.
Understanding the practical side is very important in my game. A cement is a binder, a substance used in construction that sets, hardens and adheres to other materials, binding them together. Cement is seldom used solely, but is used to bind sand and gravel (aggregate) together. Cement is used with fine aggregate to produce mortar for masonry, or with sand and gravel aggregates to produce concrete
www.spab.org.uk/advice/technical-qas/technical-qa-1-dealing-with-inappropriate-cement-renders/
Outstanding job done there, something else, well done.
Thank you very much!
Great music
stone replacements may not of been in the budget and I'm not saying its a bad job. But but the materials used have just increased the weathering process
they will be fine.
Cement based mortar will cause more damage to the soft stone in the future, it's as simple as you. I work this stone every day in case you ask how would I know.
@@willjohnston4320 how would you repair these sandstone sills outside. I have to do some on my property
Top job there mate they look stunning 👌
Thank you.
That was a job & a 1/2 looks good hall the best my friend
Cheers mate.
Nicely shaped end result but it looks like cement and I would use lime mortar.
You made a nice job of that mate 👌
Thanks
Nice work there
Thanks mate.
hi., very useful information here. Would it be correct to use Bulding sand and lime at 3 to 1 ratio for my exterior bay window sandstone pointing/repair on 1900 building.? Many thanks
Yes go for 3 to 1.5 stronger mix for a sill. thanks
There are specialist products out there for this from Conserv who make lime mortars
Sorry but thats the wrong way to do it ! And definitely wrong materials!!
Nice work mate, I bet the customer was happy with it, lucky down hear in London we don't have that sort of work that often
Thanks mate. I do enjoy working on old buildings more style. Customer was very happy will have done all the windows soon.
+Painting and Decorating cool mate, I like working on older buildings to as they have character and with some time spent on them you can make them alive again mate, I'm currently subbing for a builder on a big barn conversation with lots of beams
Hello mate - how long did this take to complete? I noticed there was a lot of filling and oil based coats so just wanted some advice on how you managed to keep yourself busy whilst waiting for things to dry :)
The window prob 2 days if you add the time up. The rest of the room was done as well so plenty to get on with.
Whole job about 10 days. We use heaters and dehumidifier very important to have a dehumidifier.
Very nice job! Would the same theory work on external SANDSTONE cills and what would the mix ratio be?
Yes this would work outside. 3 to 1 ratio and a mortar plasticiser.
That looks stunning top class👍🏻
Ben Taylor Thanks.
These types of buildings have to be "breathable", which won't be the case using PVA and regular cement? This building will be damp in years to come, Just like the building we have currently bought and are putting right someone's else's wrong decisions and wrong materials used.
You're completely wrong and really don't understand your materials. Condensation is the general cause of most damp walls. All the materials used are breathable. Like I say you have no idea, we do this day in day out. Thanks
Does cement dry out when it gets wet? I think so... so it must breath. Also PVA is not a vapour barrier. I know my stuff and the material I use. Day in day out..
Cheers
Sand stone should be done in lime mortar this is completely wrong
Absolutely shocking, butchery.