Skip to content
A low-slope roof section covered in new black modified-bitumen membrane, adjoining a tile roof, above a landscaped desert backyard.

Flat & foam · Low-slope roofing

Patios, parapets, whole mid-century houses — the low-slope roof nobody sees.

Patios, additions, parapet decks and whole mid-century houses. Low-slope roofs fail at the edges and the drains — which is exactly where we spend the time.

Who this is for

Mid-century and desert-modern homes, parapet-walled flat roofs, patio and carport additions, and any house with a low-slope section behind the tile.

The detail

What this work actually involves.

A huge number of Valley homes have a low-slope roof even if the front elevation is all tile — over the patio, over the addition, behind a parapet wall, or across an entire mid-century ranch. Water does not run off these roofs so much as it is escorted off, and every place where the roof turns up a wall or drops into a scupper is a place it can be held instead.

We install torch-applied and self-adhered modified bitumen with a granulated cap sheet, and we work on sprayed polyurethane foam roofs — the tan, seamless surface that covers thousands of Phoenix and Mesa homes. Foam is genuinely well suited to this climate when it is maintained: it is monolithic, it insulates, and it can be re-coated instead of torn off. Left uncoated, the UV eats it.

The details are the whole job. Base flashing that runs up the parapet properly and terminates under counter-flashing rather than a bead of caulk. Scuppers and drains sized and flashed so they actually take water. Positive drainage worked into the field so the roof is not holding ponds three days after a storm. And a clean tie-in where the low-slope meets the tile or metal above it — the single most common leak on a mixed roof.

What's included

Flat & Foam Roofing, line by line.

  • Torch-applied and self-adhered modified bitumen systems
  • Granulated cap sheet in the field
  • Sprayed polyurethane foam roof repair and re-coat
  • Parapet base flashing terminated under counter-flashing
  • Scupper, drain and overflow flashing
  • Ponding areas addressed with slope correction where feasible
  • Clean tie-in detail where low-slope meets tile or metal
  • Metal fascia and edge metal wrapped at the perimeter
  • Patio, carport and addition decks

Our work

Flat & Foam Roofing on real roofs.

Every photo below is a job we did. Nothing on this site is stock.

Full gallery
A low-slope residential roof finished with gray granulated cap sheet, with a propane torch, blower and roofing sealant staged across the deck.
Deep charcoal metal fascia wrapping the roof edge of a modern flat-roof desert home, seen across the tan granulated flat-roof surface.
Cantilevered roof wing wrapped in gray metal fascia projecting over a flat granulated roof deck with freshly flashed parapet base.
Freshly sealed dark flat roof deck on a Phoenix home, with roofing tools, a blower and a sealant can laid out across the surface and a tile roof section visible beyond the parapet.

Questions about this work

Flat & Foam Roofing straight answers.

Water sits on my flat roof for days. Is that normal?

It is common and it is not good. Standing water accelerates the breakdown of any low-slope system and finds every weak seam. Sometimes it is a blocked scupper, sometimes it needs slope built into the field — we will tell you which.

My foam roof is chalky and cracking. Does it need to be torn off?

Often not. Foam that is intact under the surface can usually be prepped and re-coated, which is far cheaper than removal. If the foam is saturated or delaminated from the deck, that section has to come off.

How often does a foam roof need re-coating?

Coatings are a maintenance item in Arizona sun, not a one-time install. The right interval depends on the coating and the exposure — an inspection tells you where yours is in that cycle.

Can you do just the patio section?

Yes. Patio covers, carports and additions are some of the most common low-slope work we do, and the tie-in to the main roof is where the attention goes.

Gray standing-seam metal roof on a desert home with a ladder over the ridge, backed by a saguaro-covered hillside glowing in late-day light

Free estimate

Get someone on the roof who will show you the photos.

Call or text (602) 794-5224, or send photos over WhatsApp. We walk the roof, photograph what we find, and put a written estimate in front of you — including when the honest answer is that you do not need us yet.

G&L Roofing Services LLC · 3336 W Missouri Ave, Phoenix, AZ 85017

Call nowFree estimate