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Hi, I'm moving a shower enclosure from one corner to another. In the new location the tiles are sound but will require some work as there is a small wiindow that I would like to convert to a niche. The wall is solid 9inch without cavity, which has been plastered over and then tiled. A lot of...

Hi, I'm using the same bricks (Ash Multi) - https://www.marshalls.co.uk/gardens-and-driveways/product/marshalite-pitch-faced-garden-walling as this image, but not sure what colour the mortar is or how to achieve. Its either white or a light grey. Any ideas please?

Hi, An extension with a flat roof has been built and BC wants insulated plasterboard installed on top of a vcl for the ceiling. The plasterer suggested rather than using insulated plasterboard 35mm (...

Hi, I'm preparing for a flat roof which slopes to the front. On the side there is a cavity wall, and I'm unsure where the outer wall should end. Must it meet the bottom of the OSB deck (as illustrated), eliminatting any gaps with compo or does a gap not matter?

Hi, Wondering if someone can help me with a gutter situation. I have a cavity wall on a kitchen extension, and the outer wall is on the boundary and I don't wish the gutter to overhang into the neighbours land. I've seen box butter but these are when there is a parapet wall, the external wall...

Hi, The wall is built against the boundary and I should not be overhanging the gutter, hence require gutter flush to the wall. Unfortunately I'm unsure how its done. I know sometimes square gutters made from ply and lined with lead are used or use of an aluminium square gutter. I was wondering...

Hi, I'm having a vaulted ceiling and a Ridge Steel has been fitted. Internally, I want a triangular ceiling. I was wondering how the rafters should be fitted on the steel. I've attached an image with two options. 1. where the rafter fits into web of steel with noggins 2. add a bolted timber...

Hi, I want to keep the roof height to a minimum and thus planned to install a cold roof rather than a warm roof. Because this requires venting, which can be problematic, the inspector suggested an 'inverted warm deck' / hybrid. The cold roof plan was to put in 100mm of insulation between...

I’m having a single storey extension built and have query about the structure required for a gable window. There are two glazed areas, triangular piece of glass for gable and doors below. I would like to keep the horizontal bar between the top glazed section and the doors to a minimum height for...

Hi, I'm constructing a roof for a single storey extension. The roof is composed of two parts, one gable (vaulted ceiling) and one flat roof. I've attached image. I'm under the understanding that usually rafters from an inclined section are connected by a birdsmouth, but internally this will...

Hi, I'm trying to work out the length of steels needed from the plan (attached). This is dictated by the amount of bearing required. The steel in question is highlighted in yellow. Not sure why the SE put in 215 x 215 x 140 padstone on the right and a smaller padstone on the left. I will put in...

Hi, A question whether the OBS board should sit on any of the leaf’s of wall. I’m constructing a vented flat roof, the closest joist will be a few inches from the inner wall. Should the OBS sit on the brickwork to provide additional support? See diagram and note I’ve left the inner wall...

Hi, I'm having a cold flat roof installed. 100mm PIR board to be inserted between the joists and some form of insulation with plasterboard will need to be fitted to the ceiling. I understand a vapour barrier needs to be fitted between bottom of joists (where the 100mm is inserted) and the...

Hi, I'm building an extension with a flat roof and I have a question about the joists. Its a cold roof system. The walls are coming out on the back of the house and the builder put in a steel. Normally the joists fit into the web of the steel and the other side rests on a wall plate. The...

Hi, I'm installing a flat roof on a single storey extension. I'm installing the first rafter and unsure how far it should be from the adjacent wall that runs parallel. Is there a set distance or does butt up to the internal wall ? I will be adding insulation in between the rafters so not sure if...

Hi, I'm working on a single storey extension which has a 3600mm bifold door to be fitted in a 100mm cavity wall. The weight on the lintel will be: 1 course block (up to wall plate) 50mm x 150mm joists boarded and felted. The one side of joists will be on hangers fixed to the original build...

Hi, I'm having a 178 x 102 rsj (160 x 45 internal web) fitted to support an existing wall and want the existing joists (50 x 150mm) to be attached slightly higher than the rsj. The usual designs I've seen are where the joists rest on the rsj or the joists fit inside the rsj (sometimes with a...

Hi, I'm having built single storey extension with a bifold leading to the patio. It will have a flat roof, so not much weight. The opening is 3.6m brick to brick, thermalite inside and concrete block outside, 100mm cavity. I assume this is too wide for a pre-stressed lintel so considering a...

Hi, I am taking a corner out of the kitchen on the ground floor which will be supported by a 'T' RSJ section. The largest RSJ (203 x 203 x52) has a span of 5m. One end will be on the original 9inch brick pier and the other will be on a new 300mm wall (inner leaf - 100mm). The builder has built...

Hi, I have a couple of questions relating to the approved drawings for a single storey 3m extension. A new 5.5m wall will be built next to the neighbours house on the left. Some of the wall will be in the existing garage and it will extend by 3m onto the patio. The original architect added a...