Large plaster cracks!!
Conservatories are a great all-round addition to any home. Find help, advice and information on all aspects of this area.

7 posts   •   Page 1 of 1
Jimbo2008
Labourer
Labourer
Posts: 4
Joined: Mon Feb 11, 2008 6:54 am

Large plaster cracks!!

by Jimbo2008 » Tue Jan 27, 2009 8:04 am

Hi

I built my conservatory last year, the dwarf wall was made up of brick externally and lightweight block internally which is plastered. From then until now cracks have appeared and got worse in the 2 internal corners furthest away from the house. Also my skirting scribes have also opened up (gutted, I got them perfect as well). One corner has got really bad and the crack and scribe has opened up by about 10mm. The external bricks have absolutely no cracks at all and all mortar joints are intact.

Any ideas??

Thanks

stoneyboy
Project Manager
Project Manager
Posts: 6397
Joined: Wed Dec 10, 2008 6:44 pm

by stoneyboy » Tue Jan 27, 2009 9:54 pm

Jimbo2008,
Did you build a foundation for the inner and outer walls and is the conservatory mounted on the inner or outer wall?
end

Jimbo2008
Labourer
Labourer
Posts: 4
Joined: Mon Feb 11, 2008 6:54 am

by Jimbo2008 » Wed Jan 28, 2009 3:54 pm

I used a raft foundation and the conservatory is mounted on the outer brick wall and the inner plastered block wall is capped off with a cill board.

stoneyboy
Project Manager
Project Manager
Posts: 6397
Joined: Wed Dec 10, 2008 6:44 pm

by stoneyboy » Wed Jan 28, 2009 6:35 pm

Jimbo2008,
In that case the most likely cause is that the blocks were wet when laid and a strong mortar mix was used. Shrinkage is now occuring and is concentrated in one area because of the strength of the wall.
Sorry - probably not the answer you wanted.
end

Jimbo2008
Labourer
Labourer
Posts: 4
Joined: Mon Feb 11, 2008 6:54 am

by Jimbo2008 » Thu Jan 29, 2009 6:55 am

Hi, thanks for your comments. I did wonder if the blocks were able to shrink. At least it can be remedied easily enough, it's just a bummer having to re-do my skirting.

Thanks again

TheDoctor5
Posts: 1381
Joined: Tue Jan 20, 2009 9:17 am

by TheDoctor5 » Fri Jan 30, 2009 8:59 am

If you type the key words of your question into our search box to the left of the site you may find the answer is already posted or is in the DIY projects section of the website. Every post goes through a monitoring process and using the search box may speed up your answer.

TheDoctor4
Project Manager
Project Manager
Posts: 16777203
Joined: Tue Jul 24, 2007 10:12 am
Location: Somerset in the UK in Shepton mallet

Help from DIY Doctor!

by TheDoctor4 » Mon Jun 28, 2010 9:27 pm

Discover how easy it is to find vetted and insured tradesman local to your area with the help of DIY Doctor. Visit our Find a Tradesman area: https://www.diydoctor.org.uk/find_tradesmen/

7 posts   •   Page 1 of 1
It is currently Sat Feb 17, 2024 5:02 am