dpm

Hey there Due to the clusterf*ck that was the builders who built our extension (whole other story), I've been left which thus threshold that needs to be levelled with the rest of the floor. The door is installed on the outer skin of block work, and there's then 100mm concrete and a 50mm...

Follow-on to previous post. Some developments, these are my thoughts but I would appreciate your opinion. i just had a new door fitted. It is in a different position to the previous one. That was fitted to a collection of rubble in the cavity i.e. acting as a cavity closure. When the old door...

First of all - thanks for reading. I'm an amateur DIYer so please forgive me if I use the wrong terms or just generally sound like I don't have a clue... I basically don't :LOL: I bought a (brand new) new-built house in September 2024 and have had numerous issues with the company - fobbing me...

Hello, I spontaneously decided to tear down my rabbits 12x4 enclosure to make an 11x6 not quite sure if I figured it out. But I’m getting there I’m trying to work on a budget. The timber frame is sitting on block paving right now. The timber frame is pressure treated but I was thinking of...

I have just purchased 1930s semi and have started replacing the kitchen units. The kitchen has a concrete floor with a bitumen layer on top. Upon removing the cabinet under the sink I've noticed a section of the concrete slab is missing. The hardcore/ground where the concrete is missing...

Hi All, Bit of a DPC/DPM conundrum I've got here. Long story short, I'm self-designing an extension which is required to go on a raft slab. I envisioned this would end up on a raft with a boot/stepped edge detail, however my structural engineer has recommended (and designed) a flat raft slab...

I've read a few related threads here but not quite answered my question. I have pretty limited knowledge about this stuff. I have a DPM that was put in on a first floor wall (not wholly certain I wasn't taken for a ride) and then plastered over. It's not decorated yet though so that's something...

The polythene DPM for my wet room will sit beneath layers of insulation and a concrete slab. If the floor gets regularly wet, where will the water go? Presumably it wouldn't be ideal for the concrete and insulation to be waterlogged all the time. Therefore should I leave a few deliberate drain...

Hi Everyone, TLDR; How should a DPM in a new floor slab connect to the DPC in the walls? Does it seem like I should add a DPM to the walls based on the plastering we found? I'm trying to get my head around how the (rising damp) moisture management in my house should work. It's a 1930s semi...

Hi all, I am after some advice with regards to damp in my single skin detached garage. I have had a damp survey done and it confirmed that I have damp bridging into the existing concrete slab floor from the engineering bricks below the DPC. Apparently fairly common in garages. No visible signs...

Hi, So my builder left the slab exposed for 3-4 months after laying it (badly) on a vastly over running build. So now that roof is on its floor insulation time. Weve had heaters and 3 dehumidifiers running 12 hours a day and overnight sometimes. We scrub slab to remove dark mud, clay etc then a...

Hi everyone. I have a concrete slab floor in house, some wooden batons with inch of rigid insulation foam and then a DPM/vapour membrane ontop of it all and then tounge and groove floorboards resting ontop (floating) I need to replace a few meters of the DPM as it’s ripped from floor board...

Right, here we go.. I have a detached garage built in the sixties with a substantial plinth. The garage is now gone allowing me to have a good look at the plinth. It's square and has a depth of over 150mm. It's downside is that there's no DPM. The plan is to build a garden office on top of...

Hi all, I have a question regarding retrofitting services when concrete floors have already been laid (water, elec, gas). I am undertaking some works on a partially completed barn conversion. The floors have been laid (MOT, DPM, insulation, concrete slab), but no service ducts were installed...

Hello I am currently converting my garage to a games room. The external wall side, i will be putting in a timber frame then sliding in PIR insulation... However, as for the floor, it is a concrete slab. I will be laying the DPM then insulation.... I am confused to which step to take...

Hi, Im doing 3m x 5m steel shed base in 2 stages Stage 1 was strip foundation. Shed was put, now I want to pour floor inside. I imagined I will lay out DPM and tape up against the walls and pour concrete over. The problem I have is metal shed profile. Its hollow inside and 45mm high which I...

I have a utility room with a concrete floor. When it rains I've noticed the floor gets wet. Right outside this room are two drains - one is for the kitchen sink and boiler/washing machine waste trap and the other is for the guttering drain pipe from the utility room. There is also another hole...

Could I get your thoughts? Two years ago, a contractor completed phase 1 of my renovation, creating a passage to an annex. This resulted with a 7cm step down. I now plan to raise the floor level but noticed efflorescence on the concrete at the patio doors. Can I use a Bituthene layer to close...

I live in a 1920’s semi-detached house with solid walls. As we’ve moved into winter/wetter weather I’ve noticed a tide line beginning to appear on part of the hallway wall leading to the stairs. The other half of the hallway closer to the front door does not have this issue. We have also...

Good morning, I am looking for some advice regarding my proposed solution to repair a 1920's concrete floor. The internal concrete floor is about 2 courses above the DPC. Consequently, the DPC was being bridged causing damp. I have dug a 6" trench around the perimeter of the room, to...