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Damp Proofing

Dampness in the wall which is more in contact with the rain

Anonymous user 03/03/2024 - 3.04 PM

Dear Tradesman, I have bought a new refurnished house built in 1900 6 months ago. One of the bedrooms upstairs has two outside walls which feel extremely cold to the touch in the inside and the room feels much colder than the rest even when heating is on. I can feel the cold coming through around the window. Two days ago I discovered a water patch in the middle of one of the walls. The building survey states that the house has been repointed using a very hard mortar mix. I ventilate the room every day by opening the window and I don't dry clothes inside. Based in your experience would you be able to tell me what could be the cause/causes and what could be done to eliminate the problem? I really hope you can help. Best Regards, Carmen ferradas

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2 Answers

ADR Property Maintenance

Rating: 5 out of 5
Boston
Dear Carmen, There are two problems here - allowing any water ingress in the brickwork to escape and finding the source of the water ingress. based on the age of the house it will be a solid brick construction, i.e. no cavity, built with lime mortar if it has been re-pointed with a cement based pointing this is what is causing your problem. As it is a solid brick building with no cavity, the water is transferring from the outside bricks to the inside creating dampness Solution is remove the cement pointing and replace with a N.H.L. natural hydraulic lime, this will allow the walls to breathe. There is no cement in lime mortar. It is also the wrong time of the year to do this job as the outside temperature is too low, main areas for water ingress are drips or dripping gutter, eroded roof felt at the gutter line, cracked or broken roof tiles, unsealed windows. good luck Alex
Answered25 January 2014
0

S&M Maintenance

Rating: 4.9 out of 5
Redruth
Hi In my opinion this is a problem of old and without thermal insulation of walls which also quickly absorb moisture from the outside. Please check the quality of made ​​pointing. Small cracks should be filled with cement mix with the addition of water seal. After that you should cover the entire wall water seal. It's cheap and really good damp proof exterior walls. Inside the building you need to perform thermal wall insulation. After all, the house will be dry and certainly very warm, and also save money on heating. I wish a successful renovation. Slavek
Answered3 February 2014
0