extension

Single story extension is leaking in heavy rain - we have a flat ceiling inside and in heavy rain both spotlights are dripping heavily with water. One towards the back of the extension wall and one towards the front. We’ve also got 2 other wet patches. We’ve been on the roof and inspected the...

We are planning an extension that will abut to our pitched roof. This will involve cutting back rafters and replacing the roof plate with an I-Beam. I would like to understand how this should be installed to continue to support existing rafters please. The below shows 2 options of how I envisage...

Hello, I’m trying to design a crown roof for our rear extension with two of the sides at 270cm (to reduce light impact for the neighbour) and 300cm at the other two side (to allow us to have higher kitchen units). This creates the problem of what to do at the transition between the heights. I’m...

Hello, we are planning a rear extension which will add an new UFH system, one extra radiator, and an extra towel rail. Currently we have a 10 year old Worcester Bosch 25si combi boiler which is doing alright. It has recently been serviced and the gas engineer said it is looking good...

I noticed a couple of small patches of damp around the rear uPVC door in the extension leading to the garden. Additionally the extension is very cold with the floor in particular being cold. The step outside the door is built on a foundation of bricks that are exposed and the gutter above the...

Hello Previous owners had an extension built that basically acts as an independent structure with it's own boiler, consumer unit etc... and it's own roof. Didn't think anything of it when we moved in 2 years back but the valley where the two roofs meet has been a source of leaks, partly due to...

I am looking at getting a second floor on extension which will be open on first floor for just path, so first floor would be a room, would planning permission be need to do this? The attached image shows how I would want it to look like, however my house is a semi and will need a bit of...

Hi all, I'm planning on having a flat roof extension (5x3m) with a parapet style walls but stuck on height requirements for the parapet wall. I'd like to have the parapet style walls with either stone or metal coping to avoid having plastic trims/ visible gutter pipes/etc. but I'm having...

With the 2023 building regulations changes it looks like the external wall width (from exterior brick to finished plastered internal wall) for a new extension would be: 102.5mm - exterior bricks 150mm - cavity for standard insulation (unless using some higher performance / more expensive...

Hello, hoping I can get some feedback on a drainage layout I'm trying to do for our extension. This is an update on an earlier design I posted - I've now removed the internal manhole and it is located outside instead :) We have a private combined drainage system that heads over to our...

Hi, I have recently put proctor roofshield breathable roofing membrane on my 15 degree pitched roof extension. Over the last week with the heavy rain I have noticed water coming through the membrane on to the roof rafters as if where I have nailed the battens to them. The inside of the...

Hello I’m new to this site and am looking for some help please. Currently going through a small extension and remodel of a semi-detached house. The rear elevation of the extension has half with a recessed bifold doors and the other half with a small bay with a projecting glazed bay window...

Hi, Im looking at house extensions on the property (images and current floorplan below) and what ideas people can come up with. The ideal would be to: Retain the garage Making the kitchen/diner more spacious (potentially one space and/or extending it) Create at least one study (2 people work...

Hi, I’m having difficulty finding an answer to what seems a simple question. What is a typical depth for a warm vs cold roof in a rear extension? i.e the measurement from the underside of the ceiling to the top of the roof. Thank you!

Hi, I'm trying to self plan a rear extension to our semi-detached house, and hoping someone could give some feedback on my drainage plan. Currently the rain water pipe (RWP), and soil vent pipe (SVP) connect to a manhole at the rear of the property. This is a private drain, that then runs into...

Hi, we currently have a vertical soil vent pipe. It is in the way of where we would like to build a rear extension. I’m hoping someone could offer some guidance here as without moving this pipe we’d be unable to open up the rear of the house. Is it likely to be acceptable to remove the bottom...

Rear Extension Rear Extension re-development We are thinking about buying a house in England that has a rear extension. The house is from the 1930s, the existing rear extension was built before the current owners moved in so pre 2011, it is 3m in depth and the width on one side of the is...

Hello, Hoping someone might be able to help with our drain connection idea. We currently have a private drain that passes behind our house over to our neighbours garden that is marked on the Thames Water plans. From our neighbours garden it then goes into the main sewer. We'd like to do a rear...

I have had my planning permission for two story side extension approved. I am finding my self very confused now on what to do before the work can start. I called my local council today and they advice me that there are two ways to go about it. 1. Building Notice - simpler and work can begin...

Hi all - planning to have polymer bead insulation injected into cavities of our 1960s brick detached house. Prior to this we likely need to replace cavity ties which are corroded and were advised it makes sense to do this prior to insulating, as otherwise we risk distrubing the beads once...