Building projects

House extensions, loft conversions, and interior alterations.

ASL builders are a small building services business with experience, commitment & good working relations with our customers. We have been working in the construction process for over 10 years plus. We have not advertised (until now) and our work has just come from recommendations based on quality of workmanship. Now we are part of ASL Builders Brighton we are refining our projects with Response Service Quality. Our reputation is everything.

Recent building projects

Typical building project breakdown

Why choose building management

Bigger building projects like extensions, loft conversions and interior alterations need coordination of the build. It gets complicated without a trusted team of quality trades people & builders that can be scheduled in at the right time. Experience counts when it comes to resolving problems quickly during the project. There is a lot of choices before and during the building project. There is a lot to be said for tried and tested materials and understanding value & longevity.


For larger projects we work to regular stage payments. We usually work a week or two in advance of a payment. We don’t require upfront

Planning & Schedule

Planning permission may be required. We can make an application to planning applications (Brighton council) Our building work complies with building regulations. ASL are experienced with schedules and when trades tasks can overlap. If your living at the property during the project then we will arrange work times to minimise impact on daily life.

Hiring plant & material schedule

Building site access & safety are important factors especially if you have young children. ASL can hire mixers and diggers with drivers and organise access for lorries with material deliveries and skip placement.

Foundations & drainage

For an extension project the first major task is digging the foundations. Depending on the ground foundations may need strengthening with reinforcements. At this point building control will need to check the foundations. Then services, pipework & drainage can be placed before concrete footing is poured in and levelled, again buildings control will need to approve.


First a damp proofing course. Strengthening lintels or beams maybe required. On the floor area, sand is placed first before a damp-proofing membrane is positioned. Insulation is added and the concrete poured in to create the floor. There will be another inspection by buildings control at this point.

Outside walls

Inner blockwork and brickwork are built up with cavity wall insulation. Current walls are joined with the new extension walls. The traditional method is “toothing” actually inserting alternate bricks so the walls mesh together. A cost saving option is to use wall starter kits or ties which are metal inserts that hold the 2 walls together, this also negates mortar issues that can occur between new and old.

Windows & doors frames (standard & bifold)

UPVC windows & doors can be fitted for better insulation and less maintenance but wood is often used to preserve the appearance of the house design. The frames are first fitted along with lintels are integrated for strength. Bifold doors which can open onto a patio or garden are a great option but they can take around 6 weeks to be manufactured to a specified size.

Roof & Skylight options

Next the roof is built. Most simple extension roofs can be flat or sloped (roof pitch). More complex roof styles are triangular upside down “V” shape with trusses. Extension flat roofs generally consist of joists, the wooden or timber framework overlayed with a vapour barrier, then an insulation membrane to retain heat followed by a waterproof layer.

Skylight windows are becoming popular as great source of natural light to transform a space. We fit skylight windows of different types from Vellux to bespoke designs.

Materials for the top waterproofing layer vary from the use of rubbers for flat roofs to tiles mostly clay but can be slate, concrete & other materials. During construction of a more complicated tiled roof the ridge and valley are added later. Finish details include flashings, fascias, sofits and verges will be primed, stained and painted.

At this point the floor screed can be added.

Windows doors guttering & inside works

External rendering is added if part of the specification. Windows and doors are fitted into their frames. Guttering and connection to drainage. Inside carpentry, any associated plumbing and first fix electrics; wiring and sockets are ongoing. Stud walls can be built and pipework boxed off.

Breaking through dividing wall

The rest of the house is sealed to contain the dust and brickwork that’s demolished. Steel beams with padstones are added to the extension / property structure which have been approved by buildings control. Attention will be focused on joining points.

Internal plastering

Plaster board can now be added to inside walls with insulation between the wooden battens. Plaster is left for around a week depending on drying conditions before the painting & decorating can start.

Electric & plumbing second fix

Sockets made live, switches and lighting are connected up. On the plumbing side pipes are connected and taps added. The floor is laid and any underfloor heating can be setup. If there are kitchen units they will be installed now.

Extension Snagging

Full inspection and checklist is created incase of issues like leaks, electrical problems, sticking doors/windows.

Extension paperwork

Upon completion buildings control sign off the building works with building regulation paperwork. Its important you keep this in a safe place, if when you move house it will be checked by the property buyers solicitor.