Flat Roof Repair & Replacement in Holloway, London

A flat roof with an isolated split, blister or failed upstand over a dry, sound deck can usually be repaired. A roof that has been patched repeatedly, holds standing water, or shows soft or spongy boards underneath is usually near the end of its life. The partner company will survey the surface and check the deck, then set out repair and replacement options in writing. That lets you choose, and avoids paying for a re-cover that was not needed.

Reinforced bitumen felt is built up in layers and sealed at the laps, and is laid to BS 8217 on suitable decks. EPDM is a single synthetic rubber sheet laid cold, with very few joints, while GRP is a liquid resin and glass-fibre laminate cured into one seamless skin. Published London guides put felt and EPDM at roughly £80 to £120 per square metre fitted and GRP at £100 to £130. Which suits you depends on the deck, access and budget.

Ponding usually means the roof does not have enough fall, the deck has sagged, or an outlet is blocked or set too high. BS 6229 sets out the falls and detailing expected on a flat roof so that water leaves quickly. Standing water adds weight, speeds up wear on the covering and often finds a weakness in the seams. The survey should identify the cause, and a re-cover can include tapered insulation to restore a proper fall.

Yes. The Victorian terraces of N4 typically have long rear additions with a flat or low-pitched roof joined to the main wall by a lead flashing. That junction moves with temperature and has often been repaired several times over the decades. Many houses have also been converted to flats or fitted with L-shaped dormer lofts, which add more valleys and upstands. Our N4 roofs covers the area in more detail.

Published 2026 London guides put a small flat roof patch or repair at roughly £250 to £1,000, and a full re-cover in felt or EPDM at around £80 to £120 per square metre fitted. GRP is quoted at about £100 to £130 per square metre. Scaffolding, extra insulation, new outlets and rotten deck boards can add to those figures. They are indicative only, so rely on the partner company's written quote after it has surveyed your roof.

It can. Replacing a significant part of a flat roof covering is notifiable work in many cases, and Building Regulations Part L requires insulation to current standards when a roof is substantially renewed. Part C covers moisture, and Approved Document B can affect roofs close to boundaries. The partner company will tell you at survey whether notification is likely, and a new insulated roof may mean a thicker build-up than the old one.

Repairs and like-for-like covering replacement are normally fine. Changing the shape of a roof, adding a rooflight or altering a visible flat roof can need permission in Islington's conservation areas, where Article 4 directions apply in 40 of 42. The Stroud Green conservation area in Haringey also controls frontages and rooflines, and the Harringay Ladder has its own direction. Check with the relevant council before committing to a design.

A small garage or extension roof is often stripped and re-covered in a day or two, depending on weather and the condition of the deck. A larger or more complex roof with several outlets, upstands and a rotten deck can take longer. Wet weather will stop work on most systems. The partner company will give you a realistic window in the written quote, and will tell you if rain is likely to delay a particular stage.

Yes, if the leak is traced properly. Balcony and terrace roofs above living space often fail at the door threshold, at the upstands or at a drainage outlet, and the waterproof layer beneath the surface finish must be continuous. The partner company will usually lift part of the surface to find the fault. A leak into a flat below can involve more than one party, so it helps to know who owns the structure.

An independently owned partner roofing company does the work, not an in-house crew of ours. It surveys, gives you a written quote, carries out the repair or re-cover, then invoices you directly and takes payment. We handle no payment or invoices. We text you the partner's name before arrival, and if anything goes wrong you ring 07883 305739 and we chase it. The process is set out on our process.